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/******/ ({

/***/ "./node_modules/axios/index.js":
/*!*************************************!*\
  !*** ./node_modules/axios/index.js ***!
  \*************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

module.exports = __webpack_require__(/*! ./lib/axios */ "./node_modules/axios/lib/axios.js");

/***/ }),

/***/ "./node_modules/axios/lib/adapters/xhr.js":
/*!************************************************!*\
  !*** ./node_modules/axios/lib/adapters/xhr.js ***!
  \************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
var settle = __webpack_require__(/*! ./../core/settle */ "./node_modules/axios/lib/core/settle.js");
var buildURL = __webpack_require__(/*! ./../helpers/buildURL */ "./node_modules/axios/lib/helpers/buildURL.js");
var buildFullPath = __webpack_require__(/*! ../core/buildFullPath */ "./node_modules/axios/lib/core/buildFullPath.js");
var parseHeaders = __webpack_require__(/*! ./../helpers/parseHeaders */ "./node_modules/axios/lib/helpers/parseHeaders.js");
var isURLSameOrigin = __webpack_require__(/*! ./../helpers/isURLSameOrigin */ "./node_modules/axios/lib/helpers/isURLSameOrigin.js");
var createError = __webpack_require__(/*! ../core/createError */ "./node_modules/axios/lib/core/createError.js");

module.exports = function xhrAdapter(config) {
  return new Promise(function dispatchXhrRequest(resolve, reject) {
    var requestData = config.data;
    var requestHeaders = config.headers;

    if (utils.isFormData(requestData)) {
      delete requestHeaders['Content-Type']; // Let the browser set it
    }

    var request = new XMLHttpRequest();

    // HTTP basic authentication
    if (config.auth) {
      var username = config.auth.username || '';
      var password = config.auth.password || '';
      requestHeaders.Authorization = 'Basic ' + btoa(username + ':' + password);
    }

    var fullPath = buildFullPath(config.baseURL, config.url);
    request.open(config.method.toUpperCase(), buildURL(fullPath, config.params, config.paramsSerializer), true);

    // Set the request timeout in MS
    request.timeout = config.timeout;

    // Listen for ready state
    request.onreadystatechange = function handleLoad() {
      if (!request || request.readyState !== 4) {
        return;
      }

      // The request errored out and we didn't get a response, this will be
      // handled by onerror instead
      // With one exception: request that using file: protocol, most browsers
      // will return status as 0 even though it's a successful request
      if (request.status === 0 && !(request.responseURL && request.responseURL.indexOf('file:') === 0)) {
        return;
      }

      // Prepare the response
      var responseHeaders = 'getAllResponseHeaders' in request ? parseHeaders(request.getAllResponseHeaders()) : null;
      var responseData = !config.responseType || config.responseType === 'text' ? request.responseText : request.response;
      var response = {
        data: responseData,
        status: request.status,
        statusText: request.statusText,
        headers: responseHeaders,
        config: config,
        request: request
      };

      settle(resolve, reject, response);

      // Clean up request
      request = null;
    };

    // Handle browser request cancellation (as opposed to a manual cancellation)
    request.onabort = function handleAbort() {
      if (!request) {
        return;
      }

      reject(createError('Request aborted', config, 'ECONNABORTED', request));

      // Clean up request
      request = null;
    };

    // Handle low level network errors
    request.onerror = function handleError() {
      // Real errors are hidden from us by the browser
      // onerror should only fire if it's a network error
      reject(createError('Network Error', config, null, request));

      // Clean up request
      request = null;
    };

    // Handle timeout
    request.ontimeout = function handleTimeout() {
      var timeoutErrorMessage = 'timeout of ' + config.timeout + 'ms exceeded';
      if (config.timeoutErrorMessage) {
        timeoutErrorMessage = config.timeoutErrorMessage;
      }
      reject(createError(timeoutErrorMessage, config, 'ECONNABORTED',
        request));

      // Clean up request
      request = null;
    };

    // Add xsrf header
    // This is only done if running in a standard browser environment.
    // Specifically not if we're in a web worker, or react-native.
    if (utils.isStandardBrowserEnv()) {
      var cookies = __webpack_require__(/*! ./../helpers/cookies */ "./node_modules/axios/lib/helpers/cookies.js");

      // Add xsrf header
      var xsrfValue = (config.withCredentials || isURLSameOrigin(fullPath)) && config.xsrfCookieName ?
        cookies.read(config.xsrfCookieName) :
        undefined;

      if (xsrfValue) {
        requestHeaders[config.xsrfHeaderName] = xsrfValue;
      }
    }

    // Add headers to the request
    if ('setRequestHeader' in request) {
      utils.forEach(requestHeaders, function setRequestHeader(val, key) {
        if (typeof requestData === 'undefined' && key.toLowerCase() === 'content-type') {
          // Remove Content-Type if data is undefined
          delete requestHeaders[key];
        } else {
          // Otherwise add header to the request
          request.setRequestHeader(key, val);
        }
      });
    }

    // Add withCredentials to request if needed
    if (!utils.isUndefined(config.withCredentials)) {
      request.withCredentials = !!config.withCredentials;
    }

    // Add responseType to request if needed
    if (config.responseType) {
      try {
        request.responseType = config.responseType;
      } catch (e) {
        // Expected DOMException thrown by browsers not compatible XMLHttpRequest Level 2.
        // But, this can be suppressed for 'json' type as it can be parsed by default 'transformResponse' function.
        if (config.responseType !== 'json') {
          throw e;
        }
      }
    }

    // Handle progress if needed
    if (typeof config.onDownloadProgress === 'function') {
      request.addEventListener('progress', config.onDownloadProgress);
    }

    // Not all browsers support upload events
    if (typeof config.onUploadProgress === 'function' && request.upload) {
      request.upload.addEventListener('progress', config.onUploadProgress);
    }

    if (config.cancelToken) {
      // Handle cancellation
      config.cancelToken.promise.then(function onCanceled(cancel) {
        if (!request) {
          return;
        }

        request.abort();
        reject(cancel);
        // Clean up request
        request = null;
      });
    }

    if (requestData === undefined) {
      requestData = null;
    }

    // Send the request
    request.send(requestData);
  });
};


/***/ }),

/***/ "./node_modules/axios/lib/axios.js":
/*!*****************************************!*\
  !*** ./node_modules/axios/lib/axios.js ***!
  \*****************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./utils */ "./node_modules/axios/lib/utils.js");
var bind = __webpack_require__(/*! ./helpers/bind */ "./node_modules/axios/lib/helpers/bind.js");
var Axios = __webpack_require__(/*! ./core/Axios */ "./node_modules/axios/lib/core/Axios.js");
var mergeConfig = __webpack_require__(/*! ./core/mergeConfig */ "./node_modules/axios/lib/core/mergeConfig.js");
var defaults = __webpack_require__(/*! ./defaults */ "./node_modules/axios/lib/defaults.js");

/**
 * Create an instance of Axios
 *
 * @param {Object} defaultConfig The default config for the instance
 * @return {Axios} A new instance of Axios
 */
function createInstance(defaultConfig) {
  var context = new Axios(defaultConfig);
  var instance = bind(Axios.prototype.request, context);

  // Copy axios.prototype to instance
  utils.extend(instance, Axios.prototype, context);

  // Copy context to instance
  utils.extend(instance, context);

  return instance;
}

// Create the default instance to be exported
var axios = createInstance(defaults);

// Expose Axios class to allow class inheritance
axios.Axios = Axios;

// Factory for creating new instances
axios.create = function create(instanceConfig) {
  return createInstance(mergeConfig(axios.defaults, instanceConfig));
};

// Expose Cancel & CancelToken
axios.Cancel = __webpack_require__(/*! ./cancel/Cancel */ "./node_modules/axios/lib/cancel/Cancel.js");
axios.CancelToken = __webpack_require__(/*! ./cancel/CancelToken */ "./node_modules/axios/lib/cancel/CancelToken.js");
axios.isCancel = __webpack_require__(/*! ./cancel/isCancel */ "./node_modules/axios/lib/cancel/isCancel.js");

// Expose all/spread
axios.all = function all(promises) {
  return Promise.all(promises);
};
axios.spread = __webpack_require__(/*! ./helpers/spread */ "./node_modules/axios/lib/helpers/spread.js");

module.exports = axios;

// Allow use of default import syntax in TypeScript
module.exports.default = axios;


/***/ }),

/***/ "./node_modules/axios/lib/cancel/Cancel.js":
/*!*************************************************!*\
  !*** ./node_modules/axios/lib/cancel/Cancel.js ***!
  \*************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


/**
 * A `Cancel` is an object that is thrown when an operation is canceled.
 *
 * @class
 * @param {string=} message The message.
 */
function Cancel(message) {
  this.message = message;
}

Cancel.prototype.toString = function toString() {
  return 'Cancel' + (this.message ? ': ' + this.message : '');
};

Cancel.prototype.__CANCEL__ = true;

module.exports = Cancel;


/***/ }),

/***/ "./node_modules/axios/lib/cancel/CancelToken.js":
/*!******************************************************!*\
  !*** ./node_modules/axios/lib/cancel/CancelToken.js ***!
  \******************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var Cancel = __webpack_require__(/*! ./Cancel */ "./node_modules/axios/lib/cancel/Cancel.js");

/**
 * A `CancelToken` is an object that can be used to request cancellation of an operation.
 *
 * @class
 * @param {Function} executor The executor function.
 */
function CancelToken(executor) {
  if (typeof executor !== 'function') {
    throw new TypeError('executor must be a function.');
  }

  var resolvePromise;
  this.promise = new Promise(function promiseExecutor(resolve) {
    resolvePromise = resolve;
  });

  var token = this;
  executor(function cancel(message) {
    if (token.reason) {
      // Cancellation has already been requested
      return;
    }

    token.reason = new Cancel(message);
    resolvePromise(token.reason);
  });
}

/**
 * Throws a `Cancel` if cancellation has been requested.
 */
CancelToken.prototype.throwIfRequested = function throwIfRequested() {
  if (this.reason) {
    throw this.reason;
  }
};

/**
 * Returns an object that contains a new `CancelToken` and a function that, when called,
 * cancels the `CancelToken`.
 */
CancelToken.source = function source() {
  var cancel;
  var token = new CancelToken(function executor(c) {
    cancel = c;
  });
  return {
    token: token,
    cancel: cancel
  };
};

module.exports = CancelToken;


/***/ }),

/***/ "./node_modules/axios/lib/cancel/isCancel.js":
/*!***************************************************!*\
  !*** ./node_modules/axios/lib/cancel/isCancel.js ***!
  \***************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


module.exports = function isCancel(value) {
  return !!(value && value.__CANCEL__);
};


/***/ }),

/***/ "./node_modules/axios/lib/core/Axios.js":
/*!**********************************************!*\
  !*** ./node_modules/axios/lib/core/Axios.js ***!
  \**********************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
var buildURL = __webpack_require__(/*! ../helpers/buildURL */ "./node_modules/axios/lib/helpers/buildURL.js");
var InterceptorManager = __webpack_require__(/*! ./InterceptorManager */ "./node_modules/axios/lib/core/InterceptorManager.js");
var dispatchRequest = __webpack_require__(/*! ./dispatchRequest */ "./node_modules/axios/lib/core/dispatchRequest.js");
var mergeConfig = __webpack_require__(/*! ./mergeConfig */ "./node_modules/axios/lib/core/mergeConfig.js");

/**
 * Create a new instance of Axios
 *
 * @param {Object} instanceConfig The default config for the instance
 */
function Axios(instanceConfig) {
  this.defaults = instanceConfig;
  this.interceptors = {
    request: new InterceptorManager(),
    response: new InterceptorManager()
  };
}

/**
 * Dispatch a request
 *
 * @param {Object} config The config specific for this request (merged with this.defaults)
 */
Axios.prototype.request = function request(config) {
  /*eslint no-param-reassign:0*/
  // Allow for axios('example/url'[, config]) a la fetch API
  if (typeof config === 'string') {
    config = arguments[1] || {};
    config.url = arguments[0];
  } else {
    config = config || {};
  }

  config = mergeConfig(this.defaults, config);

  // Set config.method
  if (config.method) {
    config.method = config.method.toLowerCase();
  } else if (this.defaults.method) {
    config.method = this.defaults.method.toLowerCase();
  } else {
    config.method = 'get';
  }

  // Hook up interceptors middleware
  var chain = [dispatchRequest, undefined];
  var promise = Promise.resolve(config);

  this.interceptors.request.forEach(function unshiftRequestInterceptors(interceptor) {
    chain.unshift(interceptor.fulfilled, interceptor.rejected);
  });

  this.interceptors.response.forEach(function pushResponseInterceptors(interceptor) {
    chain.push(interceptor.fulfilled, interceptor.rejected);
  });

  while (chain.length) {
    promise = promise.then(chain.shift(), chain.shift());
  }

  return promise;
};

Axios.prototype.getUri = function getUri(config) {
  config = mergeConfig(this.defaults, config);
  return buildURL(config.url, config.params, config.paramsSerializer).replace(/^\?/, '');
};

// Provide aliases for supported request methods
utils.forEach(['delete', 'get', 'head', 'options'], function forEachMethodNoData(method) {
  /*eslint func-names:0*/
  Axios.prototype[method] = function(url, config) {
    return this.request(utils.merge(config || {}, {
      method: method,
      url: url
    }));
  };
});

utils.forEach(['post', 'put', 'patch'], function forEachMethodWithData(method) {
  /*eslint func-names:0*/
  Axios.prototype[method] = function(url, data, config) {
    return this.request(utils.merge(config || {}, {
      method: method,
      url: url,
      data: data
    }));
  };
});

module.exports = Axios;


/***/ }),

/***/ "./node_modules/axios/lib/core/InterceptorManager.js":
/*!***********************************************************!*\
  !*** ./node_modules/axios/lib/core/InterceptorManager.js ***!
  \***********************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");

function InterceptorManager() {
  this.handlers = [];
}

/**
 * Add a new interceptor to the stack
 *
 * @param {Function} fulfilled The function to handle `then` for a `Promise`
 * @param {Function} rejected The function to handle `reject` for a `Promise`
 *
 * @return {Number} An ID used to remove interceptor later
 */
InterceptorManager.prototype.use = function use(fulfilled, rejected) {
  this.handlers.push({
    fulfilled: fulfilled,
    rejected: rejected
  });
  return this.handlers.length - 1;
};

/**
 * Remove an interceptor from the stack
 *
 * @param {Number} id The ID that was returned by `use`
 */
InterceptorManager.prototype.eject = function eject(id) {
  if (this.handlers[id]) {
    this.handlers[id] = null;
  }
};

/**
 * Iterate over all the registered interceptors
 *
 * This method is particularly useful for skipping over any
 * interceptors that may have become `null` calling `eject`.
 *
 * @param {Function} fn The function to call for each interceptor
 */
InterceptorManager.prototype.forEach = function forEach(fn) {
  utils.forEach(this.handlers, function forEachHandler(h) {
    if (h !== null) {
      fn(h);
    }
  });
};

module.exports = InterceptorManager;


/***/ }),

/***/ "./node_modules/axios/lib/core/buildFullPath.js":
/*!******************************************************!*\
  !*** ./node_modules/axios/lib/core/buildFullPath.js ***!
  \******************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var isAbsoluteURL = __webpack_require__(/*! ../helpers/isAbsoluteURL */ "./node_modules/axios/lib/helpers/isAbsoluteURL.js");
var combineURLs = __webpack_require__(/*! ../helpers/combineURLs */ "./node_modules/axios/lib/helpers/combineURLs.js");

/**
 * Creates a new URL by combining the baseURL with the requestedURL,
 * only when the requestedURL is not already an absolute URL.
 * If the requestURL is absolute, this function returns the requestedURL untouched.
 *
 * @param {string} baseURL The base URL
 * @param {string} requestedURL Absolute or relative URL to combine
 * @returns {string} The combined full path
 */
module.exports = function buildFullPath(baseURL, requestedURL) {
  if (baseURL && !isAbsoluteURL(requestedURL)) {
    return combineURLs(baseURL, requestedURL);
  }
  return requestedURL;
};


/***/ }),

/***/ "./node_modules/axios/lib/core/createError.js":
/*!****************************************************!*\
  !*** ./node_modules/axios/lib/core/createError.js ***!
  \****************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var enhanceError = __webpack_require__(/*! ./enhanceError */ "./node_modules/axios/lib/core/enhanceError.js");

/**
 * Create an Error with the specified message, config, error code, request and response.
 *
 * @param {string} message The error message.
 * @param {Object} config The config.
 * @param {string} [code] The error code (for example, 'ECONNABORTED').
 * @param {Object} [request] The request.
 * @param {Object} [response] The response.
 * @returns {Error} The created error.
 */
module.exports = function createError(message, config, code, request, response) {
  var error = new Error(message);
  return enhanceError(error, config, code, request, response);
};


/***/ }),

/***/ "./node_modules/axios/lib/core/dispatchRequest.js":
/*!********************************************************!*\
  !*** ./node_modules/axios/lib/core/dispatchRequest.js ***!
  \********************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
var transformData = __webpack_require__(/*! ./transformData */ "./node_modules/axios/lib/core/transformData.js");
var isCancel = __webpack_require__(/*! ../cancel/isCancel */ "./node_modules/axios/lib/cancel/isCancel.js");
var defaults = __webpack_require__(/*! ../defaults */ "./node_modules/axios/lib/defaults.js");

/**
 * Throws a `Cancel` if cancellation has been requested.
 */
function throwIfCancellationRequested(config) {
  if (config.cancelToken) {
    config.cancelToken.throwIfRequested();
  }
}

/**
 * Dispatch a request to the server using the configured adapter.
 *
 * @param {object} config The config that is to be used for the request
 * @returns {Promise} The Promise to be fulfilled
 */
module.exports = function dispatchRequest(config) {
  throwIfCancellationRequested(config);

  // Ensure headers exist
  config.headers = config.headers || {};

  // Transform request data
  config.data = transformData(
    config.data,
    config.headers,
    config.transformRequest
  );

  // Flatten headers
  config.headers = utils.merge(
    config.headers.common || {},
    config.headers[config.method] || {},
    config.headers
  );

  utils.forEach(
    ['delete', 'get', 'head', 'post', 'put', 'patch', 'common'],
    function cleanHeaderConfig(method) {
      delete config.headers[method];
    }
  );

  var adapter = config.adapter || defaults.adapter;

  return adapter(config).then(function onAdapterResolution(response) {
    throwIfCancellationRequested(config);

    // Transform response data
    response.data = transformData(
      response.data,
      response.headers,
      config.transformResponse
    );

    return response;
  }, function onAdapterRejection(reason) {
    if (!isCancel(reason)) {
      throwIfCancellationRequested(config);

      // Transform response data
      if (reason && reason.response) {
        reason.response.data = transformData(
          reason.response.data,
          reason.response.headers,
          config.transformResponse
        );
      }
    }

    return Promise.reject(reason);
  });
};


/***/ }),

/***/ "./node_modules/axios/lib/core/enhanceError.js":
/*!*****************************************************!*\
  !*** ./node_modules/axios/lib/core/enhanceError.js ***!
  \*****************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


/**
 * Update an Error with the specified config, error code, and response.
 *
 * @param {Error} error The error to update.
 * @param {Object} config The config.
 * @param {string} [code] The error code (for example, 'ECONNABORTED').
 * @param {Object} [request] The request.
 * @param {Object} [response] The response.
 * @returns {Error} The error.
 */
module.exports = function enhanceError(error, config, code, request, response) {
  error.config = config;
  if (code) {
    error.code = code;
  }

  error.request = request;
  error.response = response;
  error.isAxiosError = true;

  error.toJSON = function() {
    return {
      // Standard
      message: this.message,
      name: this.name,
      // Microsoft
      description: this.description,
      number: this.number,
      // Mozilla
      fileName: this.fileName,
      lineNumber: this.lineNumber,
      columnNumber: this.columnNumber,
      stack: this.stack,
      // Axios
      config: this.config,
      code: this.code
    };
  };
  return error;
};


/***/ }),

/***/ "./node_modules/axios/lib/core/mergeConfig.js":
/*!****************************************************!*\
  !*** ./node_modules/axios/lib/core/mergeConfig.js ***!
  \****************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ../utils */ "./node_modules/axios/lib/utils.js");

/**
 * Config-specific merge-function which creates a new config-object
 * by merging two configuration objects together.
 *
 * @param {Object} config1
 * @param {Object} config2
 * @returns {Object} New object resulting from merging config2 to config1
 */
module.exports = function mergeConfig(config1, config2) {
  // eslint-disable-next-line no-param-reassign
  config2 = config2 || {};
  var config = {};

  var valueFromConfig2Keys = ['url', 'method', 'params', 'data'];
  var mergeDeepPropertiesKeys = ['headers', 'auth', 'proxy'];
  var defaultToConfig2Keys = [
    'baseURL', 'url', 'transformRequest', 'transformResponse', 'paramsSerializer',
    'timeout', 'withCredentials', 'adapter', 'responseType', 'xsrfCookieName',
    'xsrfHeaderName', 'onUploadProgress', 'onDownloadProgress',
    'maxContentLength', 'validateStatus', 'maxRedirects', 'httpAgent',
    'httpsAgent', 'cancelToken', 'socketPath'
  ];

  utils.forEach(valueFromConfig2Keys, function valueFromConfig2(prop) {
    if (typeof config2[prop] !== 'undefined') {
      config[prop] = config2[prop];
    }
  });

  utils.forEach(mergeDeepPropertiesKeys, function mergeDeepProperties(prop) {
    if (utils.isObject(config2[prop])) {
      config[prop] = utils.deepMerge(config1[prop], config2[prop]);
    } else if (typeof config2[prop] !== 'undefined') {
      config[prop] = config2[prop];
    } else if (utils.isObject(config1[prop])) {
      config[prop] = utils.deepMerge(config1[prop]);
    } else if (typeof config1[prop] !== 'undefined') {
      config[prop] = config1[prop];
    }
  });

  utils.forEach(defaultToConfig2Keys, function defaultToConfig2(prop) {
    if (typeof config2[prop] !== 'undefined') {
      config[prop] = config2[prop];
    } else if (typeof config1[prop] !== 'undefined') {
      config[prop] = config1[prop];
    }
  });

  var axiosKeys = valueFromConfig2Keys
    .concat(mergeDeepPropertiesKeys)
    .concat(defaultToConfig2Keys);

  var otherKeys = Object
    .keys(config2)
    .filter(function filterAxiosKeys(key) {
      return axiosKeys.indexOf(key) === -1;
    });

  utils.forEach(otherKeys, function otherKeysDefaultToConfig2(prop) {
    if (typeof config2[prop] !== 'undefined') {
      config[prop] = config2[prop];
    } else if (typeof config1[prop] !== 'undefined') {
      config[prop] = config1[prop];
    }
  });

  return config;
};


/***/ }),

/***/ "./node_modules/axios/lib/core/settle.js":
/*!***********************************************!*\
  !*** ./node_modules/axios/lib/core/settle.js ***!
  \***********************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var createError = __webpack_require__(/*! ./createError */ "./node_modules/axios/lib/core/createError.js");

/**
 * Resolve or reject a Promise based on response status.
 *
 * @param {Function} resolve A function that resolves the promise.
 * @param {Function} reject A function that rejects the promise.
 * @param {object} response The response.
 */
module.exports = function settle(resolve, reject, response) {
  var validateStatus = response.config.validateStatus;
  if (!validateStatus || validateStatus(response.status)) {
    resolve(response);
  } else {
    reject(createError(
      'Request failed with status code ' + response.status,
      response.config,
      null,
      response.request,
      response
    ));
  }
};


/***/ }),

/***/ "./node_modules/axios/lib/core/transformData.js":
/*!******************************************************!*\
  !*** ./node_modules/axios/lib/core/transformData.js ***!
  \******************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");

/**
 * Transform the data for a request or a response
 *
 * @param {Object|String} data The data to be transformed
 * @param {Array} headers The headers for the request or response
 * @param {Array|Function} fns A single function or Array of functions
 * @returns {*} The resulting transformed data
 */
module.exports = function transformData(data, headers, fns) {
  /*eslint no-param-reassign:0*/
  utils.forEach(fns, function transform(fn) {
    data = fn(data, headers);
  });

  return data;
};


/***/ }),

/***/ "./node_modules/axios/lib/defaults.js":
/*!********************************************!*\
  !*** ./node_modules/axios/lib/defaults.js ***!
  \********************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";
/* WEBPACK VAR INJECTION */(function(process) {

var utils = __webpack_require__(/*! ./utils */ "./node_modules/axios/lib/utils.js");
var normalizeHeaderName = __webpack_require__(/*! ./helpers/normalizeHeaderName */ "./node_modules/axios/lib/helpers/normalizeHeaderName.js");

var DEFAULT_CONTENT_TYPE = {
  'Content-Type': 'application/x-www-form-urlencoded'
};

function setContentTypeIfUnset(headers, value) {
  if (!utils.isUndefined(headers) && utils.isUndefined(headers['Content-Type'])) {
    headers['Content-Type'] = value;
  }
}

function getDefaultAdapter() {
  var adapter;
  if (typeof XMLHttpRequest !== 'undefined') {
    // For browsers use XHR adapter
    adapter = __webpack_require__(/*! ./adapters/xhr */ "./node_modules/axios/lib/adapters/xhr.js");
  } else if (typeof process !== 'undefined' && Object.prototype.toString.call(process) === '[object process]') {
    // For node use HTTP adapter
    adapter = __webpack_require__(/*! ./adapters/http */ "./node_modules/axios/lib/adapters/xhr.js");
  }
  return adapter;
}

var defaults = {
  adapter: getDefaultAdapter(),

  transformRequest: [function transformRequest(data, headers) {
    normalizeHeaderName(headers, 'Accept');
    normalizeHeaderName(headers, 'Content-Type');
    if (utils.isFormData(data) ||
      utils.isArrayBuffer(data) ||
      utils.isBuffer(data) ||
      utils.isStream(data) ||
      utils.isFile(data) ||
      utils.isBlob(data)
    ) {
      return data;
    }
    if (utils.isArrayBufferView(data)) {
      return data.buffer;
    }
    if (utils.isURLSearchParams(data)) {
      setContentTypeIfUnset(headers, 'application/x-www-form-urlencoded;charset=utf-8');
      return data.toString();
    }
    if (utils.isObject(data)) {
      setContentTypeIfUnset(headers, 'application/json;charset=utf-8');
      return JSON.stringify(data);
    }
    return data;
  }],

  transformResponse: [function transformResponse(data) {
    /*eslint no-param-reassign:0*/
    if (typeof data === 'string') {
      try {
        data = JSON.parse(data);
      } catch (e) { /* Ignore */ }
    }
    return data;
  }],

  /**
   * A timeout in milliseconds to abort a request. If set to 0 (default) a
   * timeout is not created.
   */
  timeout: 0,

  xsrfCookieName: 'XSRF-TOKEN',
  xsrfHeaderName: 'X-XSRF-TOKEN',

  maxContentLength: -1,

  validateStatus: function validateStatus(status) {
    return status >= 200 && status < 300;
  }
};

defaults.headers = {
  common: {
    'Accept': 'application/json, text/plain, */*'
  }
};

utils.forEach(['delete', 'get', 'head'], function forEachMethodNoData(method) {
  defaults.headers[method] = {};
});

utils.forEach(['post', 'put', 'patch'], function forEachMethodWithData(method) {
  defaults.headers[method] = utils.merge(DEFAULT_CONTENT_TYPE);
});

module.exports = defaults;

/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../../process/browser.js */ "./node_modules/process/browser.js")))

/***/ }),

/***/ "./node_modules/axios/lib/helpers/bind.js":
/*!************************************************!*\
  !*** ./node_modules/axios/lib/helpers/bind.js ***!
  \************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


module.exports = function bind(fn, thisArg) {
  return function wrap() {
    var args = new Array(arguments.length);
    for (var i = 0; i < args.length; i++) {
      args[i] = arguments[i];
    }
    return fn.apply(thisArg, args);
  };
};


/***/ }),

/***/ "./node_modules/axios/lib/helpers/buildURL.js":
/*!****************************************************!*\
  !*** ./node_modules/axios/lib/helpers/buildURL.js ***!
  \****************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");

function encode(val) {
  return encodeURIComponent(val).
    replace(/%40/gi, '@').
    replace(/%3A/gi, ':').
    replace(/%24/g, '$').
    replace(/%2C/gi, ',').
    replace(/%20/g, '+').
    replace(/%5B/gi, '[').
    replace(/%5D/gi, ']');
}

/**
 * Build a URL by appending params to the end
 *
 * @param {string} url The base of the url (e.g., http://www.google.com)
 * @param {object} [params] The params to be appended
 * @returns {string} The formatted url
 */
module.exports = function buildURL(url, params, paramsSerializer) {
  /*eslint no-param-reassign:0*/
  if (!params) {
    return url;
  }

  var serializedParams;
  if (paramsSerializer) {
    serializedParams = paramsSerializer(params);
  } else if (utils.isURLSearchParams(params)) {
    serializedParams = params.toString();
  } else {
    var parts = [];

    utils.forEach(params, function serialize(val, key) {
      if (val === null || typeof val === 'undefined') {
        return;
      }

      if (utils.isArray(val)) {
        key = key + '[]';
      } else {
        val = [val];
      }

      utils.forEach(val, function parseValue(v) {
        if (utils.isDate(v)) {
          v = v.toISOString();
        } else if (utils.isObject(v)) {
          v = JSON.stringify(v);
        }
        parts.push(encode(key) + '=' + encode(v));
      });
    });

    serializedParams = parts.join('&');
  }

  if (serializedParams) {
    var hashmarkIndex = url.indexOf('#');
    if (hashmarkIndex !== -1) {
      url = url.slice(0, hashmarkIndex);
    }

    url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
  }

  return url;
};


/***/ }),

/***/ "./node_modules/axios/lib/helpers/combineURLs.js":
/*!*******************************************************!*\
  !*** ./node_modules/axios/lib/helpers/combineURLs.js ***!
  \*******************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


/**
 * Creates a new URL by combining the specified URLs
 *
 * @param {string} baseURL The base URL
 * @param {string} relativeURL The relative URL
 * @returns {string} The combined URL
 */
module.exports = function combineURLs(baseURL, relativeURL) {
  return relativeURL
    ? baseURL.replace(/\/+$/, '') + '/' + relativeURL.replace(/^\/+/, '')
    : baseURL;
};


/***/ }),

/***/ "./node_modules/axios/lib/helpers/cookies.js":
/*!***************************************************!*\
  !*** ./node_modules/axios/lib/helpers/cookies.js ***!
  \***************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");

module.exports = (
  utils.isStandardBrowserEnv() ?

  // Standard browser envs support document.cookie
    (function standardBrowserEnv() {
      return {
        write: function write(name, value, expires, path, domain, secure) {
          var cookie = [];
          cookie.push(name + '=' + encodeURIComponent(value));

          if (utils.isNumber(expires)) {
            cookie.push('expires=' + new Date(expires).toGMTString());
          }

          if (utils.isString(path)) {
            cookie.push('path=' + path);
          }

          if (utils.isString(domain)) {
            cookie.push('domain=' + domain);
          }

          if (secure === true) {
            cookie.push('secure');
          }

          document.cookie = cookie.join('; ');
        },

        read: function read(name) {
          var match = document.cookie.match(new RegExp('(^|;\\s*)(' + name + ')=([^;]*)'));
          return (match ? decodeURIComponent(match[3]) : null);
        },

        remove: function remove(name) {
          this.write(name, '', Date.now() - 86400000);
        }
      };
    })() :

  // Non standard browser env (web workers, react-native) lack needed support.
    (function nonStandardBrowserEnv() {
      return {
        write: function write() {},
        read: function read() { return null; },
        remove: function remove() {}
      };
    })()
);


/***/ }),

/***/ "./node_modules/axios/lib/helpers/isAbsoluteURL.js":
/*!*********************************************************!*\
  !*** ./node_modules/axios/lib/helpers/isAbsoluteURL.js ***!
  \*********************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


/**
 * Determines whether the specified URL is absolute
 *
 * @param {string} url The URL to test
 * @returns {boolean} True if the specified URL is absolute, otherwise false
 */
module.exports = function isAbsoluteURL(url) {
  // A URL is considered absolute if it begins with "<scheme>://" or "//" (protocol-relative URL).
  // RFC 3986 defines scheme name as a sequence of characters beginning with a letter and followed
  // by any combination of letters, digits, plus, period, or hyphen.
  return /^([a-z][a-z\d\+\-\.]*:)?\/\//i.test(url);
};


/***/ }),

/***/ "./node_modules/axios/lib/helpers/isURLSameOrigin.js":
/*!***********************************************************!*\
  !*** ./node_modules/axios/lib/helpers/isURLSameOrigin.js ***!
  \***********************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");

module.exports = (
  utils.isStandardBrowserEnv() ?

  // Standard browser envs have full support of the APIs needed to test
  // whether the request URL is of the same origin as current location.
    (function standardBrowserEnv() {
      var msie = /(msie|trident)/i.test(navigator.userAgent);
      var urlParsingNode = document.createElement('a');
      var originURL;

      /**
    * Parse a URL to discover it's components
    *
    * @param {String} url The URL to be parsed
    * @returns {Object}
    */
      function resolveURL(url) {
        var href = url;

        if (msie) {
        // IE needs attribute set twice to normalize properties
          urlParsingNode.setAttribute('href', href);
          href = urlParsingNode.href;
        }

        urlParsingNode.setAttribute('href', href);

        // urlParsingNode provides the UrlUtils interface - http://url.spec.whatwg.org/#urlutils
        return {
          href: urlParsingNode.href,
          protocol: urlParsingNode.protocol ? urlParsingNode.protocol.replace(/:$/, '') : '',
          host: urlParsingNode.host,
          search: urlParsingNode.search ? urlParsingNode.search.replace(/^\?/, '') : '',
          hash: urlParsingNode.hash ? urlParsingNode.hash.replace(/^#/, '') : '',
          hostname: urlParsingNode.hostname,
          port: urlParsingNode.port,
          pathname: (urlParsingNode.pathname.charAt(0) === '/') ?
            urlParsingNode.pathname :
            '/' + urlParsingNode.pathname
        };
      }

      originURL = resolveURL(window.location.href);

      /**
    * Determine if a URL shares the same origin as the current location
    *
    * @param {String} requestURL The URL to test
    * @returns {boolean} True if URL shares the same origin, otherwise false
    */
      return function isURLSameOrigin(requestURL) {
        var parsed = (utils.isString(requestURL)) ? resolveURL(requestURL) : requestURL;
        return (parsed.protocol === originURL.protocol &&
            parsed.host === originURL.host);
      };
    })() :

  // Non standard browser envs (web workers, react-native) lack needed support.
    (function nonStandardBrowserEnv() {
      return function isURLSameOrigin() {
        return true;
      };
    })()
);


/***/ }),

/***/ "./node_modules/axios/lib/helpers/normalizeHeaderName.js":
/*!***************************************************************!*\
  !*** ./node_modules/axios/lib/helpers/normalizeHeaderName.js ***!
  \***************************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ../utils */ "./node_modules/axios/lib/utils.js");

module.exports = function normalizeHeaderName(headers, normalizedName) {
  utils.forEach(headers, function processHeader(value, name) {
    if (name !== normalizedName && name.toUpperCase() === normalizedName.toUpperCase()) {
      headers[normalizedName] = value;
      delete headers[name];
    }
  });
};


/***/ }),

/***/ "./node_modules/axios/lib/helpers/parseHeaders.js":
/*!********************************************************!*\
  !*** ./node_modules/axios/lib/helpers/parseHeaders.js ***!
  \********************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");

// Headers whose duplicates are ignored by node
// c.f. https://nodejs.org/api/http.html#http_message_headers
var ignoreDuplicateOf = [
  'age', 'authorization', 'content-length', 'content-type', 'etag',
  'expires', 'from', 'host', 'if-modified-since', 'if-unmodified-since',
  'last-modified', 'location', 'max-forwards', 'proxy-authorization',
  'referer', 'retry-after', 'user-agent'
];

/**
 * Parse headers into an object
 *
 * ```
 * Date: Wed, 27 Aug 2014 08:58:49 GMT
 * Content-Type: application/json
 * Connection: keep-alive
 * Transfer-Encoding: chunked
 * ```
 *
 * @param {String} headers Headers needing to be parsed
 * @returns {Object} Headers parsed into an object
 */
module.exports = function parseHeaders(headers) {
  var parsed = {};
  var key;
  var val;
  var i;

  if (!headers) { return parsed; }

  utils.forEach(headers.split('\n'), function parser(line) {
    i = line.indexOf(':');
    key = utils.trim(line.substr(0, i)).toLowerCase();
    val = utils.trim(line.substr(i + 1));

    if (key) {
      if (parsed[key] && ignoreDuplicateOf.indexOf(key) >= 0) {
        return;
      }
      if (key === 'set-cookie') {
        parsed[key] = (parsed[key] ? parsed[key] : []).concat([val]);
      } else {
        parsed[key] = parsed[key] ? parsed[key] + ', ' + val : val;
      }
    }
  });

  return parsed;
};


/***/ }),

/***/ "./node_modules/axios/lib/helpers/spread.js":
/*!**************************************************!*\
  !*** ./node_modules/axios/lib/helpers/spread.js ***!
  \**************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


/**
 * Syntactic sugar for invoking a function and expanding an array for arguments.
 *
 * Common use case would be to use `Function.prototype.apply`.
 *
 *  ```js
 *  function f(x, y, z) {}
 *  var args = [1, 2, 3];
 *  f.apply(null, args);
 *  ```
 *
 * With `spread` this example can be re-written.
 *
 *  ```js
 *  spread(function(x, y, z) {})([1, 2, 3]);
 *  ```
 *
 * @param {Function} callback
 * @returns {Function}
 */
module.exports = function spread(callback) {
  return function wrap(arr) {
    return callback.apply(null, arr);
  };
};


/***/ }),

/***/ "./node_modules/axios/lib/utils.js":
/*!*****************************************!*\
  !*** ./node_modules/axios/lib/utils.js ***!
  \*****************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var bind = __webpack_require__(/*! ./helpers/bind */ "./node_modules/axios/lib/helpers/bind.js");

/*global toString:true*/

// utils is a library of generic helper functions non-specific to axios

var toString = Object.prototype.toString;

/**
 * Determine if a value is an Array
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is an Array, otherwise false
 */
function isArray(val) {
  return toString.call(val) === '[object Array]';
}

/**
 * Determine if a value is undefined
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if the value is undefined, otherwise false
 */
function isUndefined(val) {
  return typeof val === 'undefined';
}

/**
 * Determine if a value is a Buffer
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a Buffer, otherwise false
 */
function isBuffer(val) {
  return val !== null && !isUndefined(val) && val.constructor !== null && !isUndefined(val.constructor)
    && typeof val.constructor.isBuffer === 'function' && val.constructor.isBuffer(val);
}

/**
 * Determine if a value is an ArrayBuffer
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is an ArrayBuffer, otherwise false
 */
function isArrayBuffer(val) {
  return toString.call(val) === '[object ArrayBuffer]';
}

/**
 * Determine if a value is a FormData
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is an FormData, otherwise false
 */
function isFormData(val) {
  return (typeof FormData !== 'undefined') && (val instanceof FormData);
}

/**
 * Determine if a value is a view on an ArrayBuffer
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a view on an ArrayBuffer, otherwise false
 */
function isArrayBufferView(val) {
  var result;
  if ((typeof ArrayBuffer !== 'undefined') && (ArrayBuffer.isView)) {
    result = ArrayBuffer.isView(val);
  } else {
    result = (val) && (val.buffer) && (val.buffer instanceof ArrayBuffer);
  }
  return result;
}

/**
 * Determine if a value is a String
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a String, otherwise false
 */
function isString(val) {
  return typeof val === 'string';
}

/**
 * Determine if a value is a Number
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a Number, otherwise false
 */
function isNumber(val) {
  return typeof val === 'number';
}

/**
 * Determine if a value is an Object
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is an Object, otherwise false
 */
function isObject(val) {
  return val !== null && typeof val === 'object';
}

/**
 * Determine if a value is a Date
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a Date, otherwise false
 */
function isDate(val) {
  return toString.call(val) === '[object Date]';
}

/**
 * Determine if a value is a File
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a File, otherwise false
 */
function isFile(val) {
  return toString.call(val) === '[object File]';
}

/**
 * Determine if a value is a Blob
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a Blob, otherwise false
 */
function isBlob(val) {
  return toString.call(val) === '[object Blob]';
}

/**
 * Determine if a value is a Function
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a Function, otherwise false
 */
function isFunction(val) {
  return toString.call(val) === '[object Function]';
}

/**
 * Determine if a value is a Stream
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a Stream, otherwise false
 */
function isStream(val) {
  return isObject(val) && isFunction(val.pipe);
}

/**
 * Determine if a value is a URLSearchParams object
 *
 * @param {Object} val The value to test
 * @returns {boolean} True if value is a URLSearchParams object, otherwise false
 */
function isURLSearchParams(val) {
  return typeof URLSearchParams !== 'undefined' && val instanceof URLSearchParams;
}

/**
 * Trim excess whitespace off the beginning and end of a string
 *
 * @param {String} str The String to trim
 * @returns {String} The String freed of excess whitespace
 */
function trim(str) {
  return str.replace(/^\s*/, '').replace(/\s*$/, '');
}

/**
 * Determine if we're running in a standard browser environment
 *
 * This allows axios to run in a web worker, and react-native.
 * Both environments support XMLHttpRequest, but not fully standard globals.
 *
 * web workers:
 *  typeof window -> undefined
 *  typeof document -> undefined
 *
 * react-native:
 *  navigator.product -> 'ReactNative'
 * nativescript
 *  navigator.product -> 'NativeScript' or 'NS'
 */
function isStandardBrowserEnv() {
  if (typeof navigator !== 'undefined' && (navigator.product === 'ReactNative' ||
                                           navigator.product === 'NativeScript' ||
                                           navigator.product === 'NS')) {
    return false;
  }
  return (
    typeof window !== 'undefined' &&
    typeof document !== 'undefined'
  );
}

/**
 * Iterate over an Array or an Object invoking a function for each item.
 *
 * If `obj` is an Array callback will be called passing
 * the value, index, and complete array for each item.
 *
 * If 'obj' is an Object callback will be called passing
 * the value, key, and complete object for each property.
 *
 * @param {Object|Array} obj The object to iterate
 * @param {Function} fn The callback to invoke for each item
 */
function forEach(obj, fn) {
  // Don't bother if no value provided
  if (obj === null || typeof obj === 'undefined') {
    return;
  }

  // Force an array if not already something iterable
  if (typeof obj !== 'object') {
    /*eslint no-param-reassign:0*/
    obj = [obj];
  }

  if (isArray(obj)) {
    // Iterate over array values
    for (var i = 0, l = obj.length; i < l; i++) {
      fn.call(null, obj[i], i, obj);
    }
  } else {
    // Iterate over object keys
    for (var key in obj) {
      if (Object.prototype.hasOwnProperty.call(obj, key)) {
        fn.call(null, obj[key], key, obj);
      }
    }
  }
}

/**
 * Accepts varargs expecting each argument to be an object, then
 * immutably merges the properties of each object and returns result.
 *
 * When multiple objects contain the same key the later object in
 * the arguments list will take precedence.
 *
 * Example:
 *
 * ```js
 * var result = merge({foo: 123}, {foo: 456});
 * console.log(result.foo); // outputs 456
 * ```
 *
 * @param {Object} obj1 Object to merge
 * @returns {Object} Result of all merge properties
 */
function merge(/* obj1, obj2, obj3, ... */) {
  var result = {};
  function assignValue(val, key) {
    if (typeof result[key] === 'object' && typeof val === 'object') {
      result[key] = merge(result[key], val);
    } else {
      result[key] = val;
    }
  }

  for (var i = 0, l = arguments.length; i < l; i++) {
    forEach(arguments[i], assignValue);
  }
  return result;
}

/**
 * Function equal to merge with the difference being that no reference
 * to original objects is kept.
 *
 * @see merge
 * @param {Object} obj1 Object to merge
 * @returns {Object} Result of all merge properties
 */
function deepMerge(/* obj1, obj2, obj3, ... */) {
  var result = {};
  function assignValue(val, key) {
    if (typeof result[key] === 'object' && typeof val === 'object') {
      result[key] = deepMerge(result[key], val);
    } else if (typeof val === 'object') {
      result[key] = deepMerge({}, val);
    } else {
      result[key] = val;
    }
  }

  for (var i = 0, l = arguments.length; i < l; i++) {
    forEach(arguments[i], assignValue);
  }
  return result;
}

/**
 * Extends object a by mutably adding to it the properties of object b.
 *
 * @param {Object} a The object to be extended
 * @param {Object} b The object to copy properties from
 * @param {Object} thisArg The object to bind function to
 * @return {Object} The resulting value of object a
 */
function extend(a, b, thisArg) {
  forEach(b, function assignValue(val, key) {
    if (thisArg && typeof val === 'function') {
      a[key] = bind(val, thisArg);
    } else {
      a[key] = val;
    }
  });
  return a;
}

module.exports = {
  isArray: isArray,
  isArrayBuffer: isArrayBuffer,
  isBuffer: isBuffer,
  isFormData: isFormData,
  isArrayBufferView: isArrayBufferView,
  isString: isString,
  isNumber: isNumber,
  isObject: isObject,
  isUndefined: isUndefined,
  isDate: isDate,
  isFile: isFile,
  isBlob: isBlob,
  isFunction: isFunction,
  isStream: isStream,
  isURLSearchParams: isURLSearchParams,
  isStandardBrowserEnv: isStandardBrowserEnv,
  forEach: forEach,
  merge: merge,
  deepMerge: deepMerge,
  extend: extend,
  trim: trim
};


/***/ }),

/***/ "./node_modules/lodash/lodash.js":
/*!***************************************!*\
  !*** ./node_modules/lodash/lodash.js ***!
  \***************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

/* WEBPACK VAR INJECTION */(function(global, module) {var __WEBPACK_AMD_DEFINE_RESULT__;/**
 * @license
 * Lodash <https://lodash.com/>
 * Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
 * Released under MIT license <https://lodash.com/license>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 */
;(function() {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /** Used as the semantic version number. */
  var VERSION = '4.17.15';

  /** Used as the size to enable large array optimizations. */
  var LARGE_ARRAY_SIZE = 200;

  /** Error message constants. */
  var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
      FUNC_ERROR_TEXT = 'Expected a function';

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED = '__lodash_hash_undefined__';

  /** Used as the maximum memoize cache size. */
  var MAX_MEMOIZE_SIZE = 500;

  /** Used as the internal argument placeholder. */
  var PLACEHOLDER = '__lodash_placeholder__';

  /** Used to compose bitmasks for cloning. */
  var CLONE_DEEP_FLAG = 1,
      CLONE_FLAT_FLAG = 2,
      CLONE_SYMBOLS_FLAG = 4;

  /** Used to compose bitmasks for value comparisons. */
  var COMPARE_PARTIAL_FLAG = 1,
      COMPARE_UNORDERED_FLAG = 2;

  /** Used to compose bitmasks for function metadata. */
  var WRAP_BIND_FLAG = 1,
      WRAP_BIND_KEY_FLAG = 2,
      WRAP_CURRY_BOUND_FLAG = 4,
      WRAP_CURRY_FLAG = 8,
      WRAP_CURRY_RIGHT_FLAG = 16,
      WRAP_PARTIAL_FLAG = 32,
      WRAP_PARTIAL_RIGHT_FLAG = 64,
      WRAP_ARY_FLAG = 128,
      WRAP_REARG_FLAG = 256,
      WRAP_FLIP_FLAG = 512;

  /** Used as default options for `_.truncate`. */
  var DEFAULT_TRUNC_LENGTH = 30,
      DEFAULT_TRUNC_OMISSION = '...';

  /** Used to detect hot functions by number of calls within a span of milliseconds. */
  var HOT_COUNT = 800,
      HOT_SPAN = 16;

  /** Used to indicate the type of lazy iteratees. */
  var LAZY_FILTER_FLAG = 1,
      LAZY_MAP_FLAG = 2,
      LAZY_WHILE_FLAG = 3;

  /** Used as references for various `Number` constants. */
  var INFINITY = 1 / 0,
      MAX_SAFE_INTEGER = 9007199254740991,
      MAX_INTEGER = 1.7976931348623157e+308,
      NAN = 0 / 0;

  /** Used as references for the maximum length and index of an array. */
  var MAX_ARRAY_LENGTH = 4294967295,
      MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
      HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;

  /** Used to associate wrap methods with their bit flags. */
  var wrapFlags = [
    ['ary', WRAP_ARY_FLAG],
    ['bind', WRAP_BIND_FLAG],
    ['bindKey', WRAP_BIND_KEY_FLAG],
    ['curry', WRAP_CURRY_FLAG],
    ['curryRight', WRAP_CURRY_RIGHT_FLAG],
    ['flip', WRAP_FLIP_FLAG],
    ['partial', WRAP_PARTIAL_FLAG],
    ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
    ['rearg', WRAP_REARG_FLAG]
  ];

  /** `Object#toString` result references. */
  var argsTag = '[object Arguments]',
      arrayTag = '[object Array]',
      asyncTag = '[object AsyncFunction]',
      boolTag = '[object Boolean]',
      dateTag = '[object Date]',
      domExcTag = '[object DOMException]',
      errorTag = '[object Error]',
      funcTag = '[object Function]',
      genTag = '[object GeneratorFunction]',
      mapTag = '[object Map]',
      numberTag = '[object Number]',
      nullTag = '[object Null]',
      objectTag = '[object Object]',
      promiseTag = '[object Promise]',
      proxyTag = '[object Proxy]',
      regexpTag = '[object RegExp]',
      setTag = '[object Set]',
      stringTag = '[object String]',
      symbolTag = '[object Symbol]',
      undefinedTag = '[object Undefined]',
      weakMapTag = '[object WeakMap]',
      weakSetTag = '[object WeakSet]';

  var arrayBufferTag = '[object ArrayBuffer]',
      dataViewTag = '[object DataView]',
      float32Tag = '[object Float32Array]',
      float64Tag = '[object Float64Array]',
      int8Tag = '[object Int8Array]',
      int16Tag = '[object Int16Array]',
      int32Tag = '[object Int32Array]',
      uint8Tag = '[object Uint8Array]',
      uint8ClampedTag = '[object Uint8ClampedArray]',
      uint16Tag = '[object Uint16Array]',
      uint32Tag = '[object Uint32Array]';

  /** Used to match empty string literals in compiled template source. */
  var reEmptyStringLeading = /\b__p \+= '';/g,
      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

  /** Used to match HTML entities and HTML characters. */
  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
      reUnescapedHtml = /[&<>"']/g,
      reHasEscapedHtml = RegExp(reEscapedHtml.source),
      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);

  /** Used to match template delimiters. */
  var reEscape = /<%-([\s\S]+?)%>/g,
      reEvaluate = /<%([\s\S]+?)%>/g,
      reInterpolate = /<%=([\s\S]+?)%>/g;

  /** Used to match property names within property paths. */
  var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
      reIsPlainProp = /^\w*$/,
      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;

  /**
   * Used to match `RegExp`
   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
   */
  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
      reHasRegExpChar = RegExp(reRegExpChar.source);

  /** Used to match leading and trailing whitespace. */
  var reTrim = /^\s+|\s+$/g,
      reTrimStart = /^\s+/,
      reTrimEnd = /\s+$/;

  /** Used to match wrap detail comments. */
  var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
      reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
      reSplitDetails = /,? & /;

  /** Used to match words composed of alphanumeric characters. */
  var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;

  /** Used to match backslashes in property paths. */
  var reEscapeChar = /\\(\\)?/g;

  /**
   * Used to match
   * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
   */
  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

  /** Used to match `RegExp` flags from their coerced string values. */
  var reFlags = /\w*$/;

  /** Used to detect bad signed hexadecimal string values. */
  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

  /** Used to detect binary string values. */
  var reIsBinary = /^0b[01]+$/i;

  /** Used to detect host constructors (Safari). */
  var reIsHostCtor = /^\[object .+?Constructor\]$/;

  /** Used to detect octal string values. */
  var reIsOctal = /^0o[0-7]+$/i;

  /** Used to detect unsigned integer values. */
  var reIsUint = /^(?:0|[1-9]\d*)$/;

  /** Used to match Latin Unicode letters (excluding mathematical operators). */
  var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;

  /** Used to ensure capturing order of template delimiters. */
  var reNoMatch = /($^)/;

  /** Used to match unescaped characters in compiled string literals. */
  var reUnescapedString = /['\n\r\u2028\u2029\\]/g;

  /** Used to compose unicode character classes. */
  var rsAstralRange = '\\ud800-\\udfff',
      rsComboMarksRange = '\\u0300-\\u036f',
      reComboHalfMarksRange = '\\ufe20-\\ufe2f',
      rsComboSymbolsRange = '\\u20d0-\\u20ff',
      rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
      rsDingbatRange = '\\u2700-\\u27bf',
      rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
      rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
      rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
      rsPunctuationRange = '\\u2000-\\u206f',
      rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
      rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
      rsVarRange = '\\ufe0e\\ufe0f',
      rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;

  /** Used to compose unicode capture groups. */
  var rsApos = "['\u2019]",
      rsAstral = '[' + rsAstralRange + ']',
      rsBreak = '[' + rsBreakRange + ']',
      rsCombo = '[' + rsComboRange + ']',
      rsDigits = '\\d+',
      rsDingbat = '[' + rsDingbatRange + ']',
      rsLower = '[' + rsLowerRange + ']',
      rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
      rsFitz = '\\ud83c[\\udffb-\\udfff]',
      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
      rsNonAstral = '[^' + rsAstralRange + ']',
      rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
      rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
      rsUpper = '[' + rsUpperRange + ']',
      rsZWJ = '\\u200d';

  /** Used to compose unicode regexes. */
  var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
      rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
      rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
      rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
      reOptMod = rsModifier + '?',
      rsOptVar = '[' + rsVarRange + ']?',
      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
      rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
      rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
      rsSeq = rsOptVar + reOptMod + rsOptJoin,
      rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';

  /** Used to match apostrophes. */
  var reApos = RegExp(rsApos, 'g');

  /**
   * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
   * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
   */
  var reComboMark = RegExp(rsCombo, 'g');

  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
  var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');

  /** Used to match complex or compound words. */
  var reUnicodeWord = RegExp([
    rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
    rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
    rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
    rsUpper + '+' + rsOptContrUpper,
    rsOrdUpper,
    rsOrdLower,
    rsDigits,
    rsEmoji
  ].join('|'), 'g');

  /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
  var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');

  /** Used to detect strings that need a more robust regexp to match words. */
  var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;

  /** Used to assign default `context` object properties. */
  var contextProps = [
    'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
    'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
    'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
  ];

  /** Used to make template sourceURLs easier to identify. */
  var templateCounter = -1;

  /** Used to identify `toStringTag` values of typed arrays. */
  var typedArrayTags = {};
  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  typedArrayTags[uint32Tag] = true;
  typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
  typedArrayTags[errorTag] = typedArrayTags[funcTag] =
  typedArrayTags[mapTag] = typedArrayTags[numberTag] =
  typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
  typedArrayTags[setTag] = typedArrayTags[stringTag] =
  typedArrayTags[weakMapTag] = false;

  /** Used to identify `toStringTag` values supported by `_.clone`. */
  var cloneableTags = {};
  cloneableTags[argsTag] = cloneableTags[arrayTag] =
  cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
  cloneableTags[boolTag] = cloneableTags[dateTag] =
  cloneableTags[float32Tag] = cloneableTags[float64Tag] =
  cloneableTags[int8Tag] = cloneableTags[int16Tag] =
  cloneableTags[int32Tag] = cloneableTags[mapTag] =
  cloneableTags[numberTag] = cloneableTags[objectTag] =
  cloneableTags[regexpTag] = cloneableTags[setTag] =
  cloneableTags[stringTag] = cloneableTags[symbolTag] =
  cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
  cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
  cloneableTags[errorTag] = cloneableTags[funcTag] =
  cloneableTags[weakMapTag] = false;

  /** Used to map Latin Unicode letters to basic Latin letters. */
  var deburredLetters = {
    // Latin-1 Supplement block.
    '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
    '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
    '\xc7': 'C',  '\xe7': 'c',
    '\xd0': 'D',  '\xf0': 'd',
    '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
    '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
    '\xcc': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
    '\xec': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
    '\xd1': 'N',  '\xf1': 'n',
    '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
    '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
    '\xd9': 'U',  '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
    '\xf9': 'u',  '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
    '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
    '\xc6': 'Ae', '\xe6': 'ae',
    '\xde': 'Th', '\xfe': 'th',
    '\xdf': 'ss',
    // Latin Extended-A block.
    '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
    '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
    '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
    '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
    '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
    '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
    '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
    '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
    '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
    '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
    '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
    '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
    '\u0134': 'J',  '\u0135': 'j',
    '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
    '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
    '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
    '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
    '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
    '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
    '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
    '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
    '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
    '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
    '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
    '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
    '\u0163': 't',  '\u0165': 't', '\u0167': 't',
    '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
    '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
    '\u0174': 'W',  '\u0175': 'w',
    '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
    '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
    '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
    '\u0132': 'IJ', '\u0133': 'ij',
    '\u0152': 'Oe', '\u0153': 'oe',
    '\u0149': "'n", '\u017f': 's'
  };

  /** Used to map characters to HTML entities. */
  var htmlEscapes = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#39;'
  };

  /** Used to map HTML entities to characters. */
  var htmlUnescapes = {
    '&amp;': '&',
    '&lt;': '<',
    '&gt;': '>',
    '&quot;': '"',
    '&#39;': "'"
  };

  /** Used to escape characters for inclusion in compiled string literals. */
  var stringEscapes = {
    '\\': '\\',
    "'": "'",
    '\n': 'n',
    '\r': 'r',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  /** Built-in method references without a dependency on `root`. */
  var freeParseFloat = parseFloat,
      freeParseInt = parseInt;

  /** Detect free variable `global` from Node.js. */
  var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

  /** Detect free variable `self`. */
  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

  /** Used as a reference to the global object. */
  var root = freeGlobal || freeSelf || Function('return this')();

  /** Detect free variable `exports`. */
  var freeExports =  true && exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Detect free variable `process` from Node.js. */
  var freeProcess = moduleExports && freeGlobal.process;

  /** Used to access faster Node.js helpers. */
  var nodeUtil = (function() {
    try {
      // Use `util.types` for Node.js 10+.
      var types = freeModule && freeModule.require && freeModule.require('util').types;

      if (types) {
        return types;
      }

      // Legacy `process.binding('util')` for Node.js < 10.
      return freeProcess && freeProcess.binding && freeProcess.binding('util');
    } catch (e) {}
  }());

  /* Node.js helper references. */
  var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
      nodeIsDate = nodeUtil && nodeUtil.isDate,
      nodeIsMap = nodeUtil && nodeUtil.isMap,
      nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
      nodeIsSet = nodeUtil && nodeUtil.isSet,
      nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;

  /*--------------------------------------------------------------------------*/

  /**
   * A faster alternative to `Function#apply`, this function invokes `func`
   * with the `this` binding of `thisArg` and the arguments of `args`.
   *
   * @private
   * @param {Function} func The function to invoke.
   * @param {*} thisArg The `this` binding of `func`.
   * @param {Array} args The arguments to invoke `func` with.
   * @returns {*} Returns the result of `func`.
   */
  function apply(func, thisArg, args) {
    switch (args.length) {
      case 0: return func.call(thisArg);
      case 1: return func.call(thisArg, args[0]);
      case 2: return func.call(thisArg, args[0], args[1]);
      case 3: return func.call(thisArg, args[0], args[1], args[2]);
    }
    return func.apply(thisArg, args);
  }

  /**
   * A specialized version of `baseAggregator` for arrays.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} setter The function to set `accumulator` values.
   * @param {Function} iteratee The iteratee to transform keys.
   * @param {Object} accumulator The initial aggregated object.
   * @returns {Function} Returns `accumulator`.
   */
  function arrayAggregator(array, setter, iteratee, accumulator) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      var value = array[index];
      setter(accumulator, value, iteratee(value), array);
    }
    return accumulator;
  }

  /**
   * A specialized version of `_.forEach` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns `array`.
   */
  function arrayEach(array, iteratee) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (iteratee(array[index], index, array) === false) {
        break;
      }
    }
    return array;
  }

  /**
   * A specialized version of `_.forEachRight` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns `array`.
   */
  function arrayEachRight(array, iteratee) {
    var length = array == null ? 0 : array.length;

    while (length--) {
      if (iteratee(array[length], length, array) === false) {
        break;
      }
    }
    return array;
  }

  /**
   * A specialized version of `_.every` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {boolean} Returns `true` if all elements pass the predicate check,
   *  else `false`.
   */
  function arrayEvery(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (!predicate(array[index], index, array)) {
        return false;
      }
    }
    return true;
  }

  /**
   * A specialized version of `_.filter` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {Array} Returns the new filtered array.
   */
  function arrayFilter(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length,
        resIndex = 0,
        result = [];

    while (++index < length) {
      var value = array[index];
      if (predicate(value, index, array)) {
        result[resIndex++] = value;
      }
    }
    return result;
  }

  /**
   * A specialized version of `_.includes` for arrays without support for
   * specifying an index to search from.
   *
   * @private
   * @param {Array} [array] The array to inspect.
   * @param {*} target The value to search for.
   * @returns {boolean} Returns `true` if `target` is found, else `false`.
   */
  function arrayIncludes(array, value) {
    var length = array == null ? 0 : array.length;
    return !!length && baseIndexOf(array, value, 0) > -1;
  }

  /**
   * This function is like `arrayIncludes` except that it accepts a comparator.
   *
   * @private
   * @param {Array} [array] The array to inspect.
   * @param {*} target The value to search for.
   * @param {Function} comparator The comparator invoked per element.
   * @returns {boolean} Returns `true` if `target` is found, else `false`.
   */
  function arrayIncludesWith(array, value, comparator) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (comparator(value, array[index])) {
        return true;
      }
    }
    return false;
  }

  /**
   * A specialized version of `_.map` for arrays without support for iteratee
   * shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns the new mapped array.
   */
  function arrayMap(array, iteratee) {
    var index = -1,
        length = array == null ? 0 : array.length,
        result = Array(length);

    while (++index < length) {
      result[index] = iteratee(array[index], index, array);
    }
    return result;
  }

  /**
   * Appends the elements of `values` to `array`.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {Array} values The values to append.
   * @returns {Array} Returns `array`.
   */
  function arrayPush(array, values) {
    var index = -1,
        length = values.length,
        offset = array.length;

    while (++index < length) {
      array[offset + index] = values[index];
    }
    return array;
  }

  /**
   * A specialized version of `_.reduce` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {*} [accumulator] The initial value.
   * @param {boolean} [initAccum] Specify using the first element of `array` as
   *  the initial value.
   * @returns {*} Returns the accumulated value.
   */
  function arrayReduce(array, iteratee, accumulator, initAccum) {
    var index = -1,
        length = array == null ? 0 : array.length;

    if (initAccum && length) {
      accumulator = array[++index];
    }
    while (++index < length) {
      accumulator = iteratee(accumulator, array[index], index, array);
    }
    return accumulator;
  }

  /**
   * A specialized version of `_.reduceRight` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {*} [accumulator] The initial value.
   * @param {boolean} [initAccum] Specify using the last element of `array` as
   *  the initial value.
   * @returns {*} Returns the accumulated value.
   */
  function arrayReduceRight(array, iteratee, accumulator, initAccum) {
    var length = array == null ? 0 : array.length;
    if (initAccum && length) {
      accumulator = array[--length];
    }
    while (length--) {
      accumulator = iteratee(accumulator, array[length], length, array);
    }
    return accumulator;
  }

  /**
   * A specialized version of `_.some` for arrays without support for iteratee
   * shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {boolean} Returns `true` if any element passes the predicate check,
   *  else `false`.
   */
  function arraySome(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (predicate(array[index], index, array)) {
        return true;
      }
    }
    return false;
  }

  /**
   * Gets the size of an ASCII `string`.
   *
   * @private
   * @param {string} string The string inspect.
   * @returns {number} Returns the string size.
   */
  var asciiSize = baseProperty('length');

  /**
   * Converts an ASCII `string` to an array.
   *
   * @private
   * @param {string} string The string to convert.
   * @returns {Array} Returns the converted array.
   */
  function asciiToArray(string) {
    return string.split('');
  }

  /**
   * Splits an ASCII `string` into an array of its words.
   *
   * @private
   * @param {string} The string to inspect.
   * @returns {Array} Returns the words of `string`.
   */
  function asciiWords(string) {
    return string.match(reAsciiWord) || [];
  }

  /**
   * The base implementation of methods like `_.findKey` and `_.findLastKey`,
   * without support for iteratee shorthands, which iterates over `collection`
   * using `eachFunc`.
   *
   * @private
   * @param {Array|Object} collection The collection to inspect.
   * @param {Function} predicate The function invoked per iteration.
   * @param {Function} eachFunc The function to iterate over `collection`.
   * @returns {*} Returns the found element or its key, else `undefined`.
   */
  function baseFindKey(collection, predicate, eachFunc) {
    var result;
    eachFunc(collection, function(value, key, collection) {
      if (predicate(value, key, collection)) {
        result = key;
        return false;
      }
    });
    return result;
  }

  /**
   * The base implementation of `_.findIndex` and `_.findLastIndex` without
   * support for iteratee shorthands.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {Function} predicate The function invoked per iteration.
   * @param {number} fromIndex The index to search from.
   * @param {boolean} [fromRight] Specify iterating from right to left.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseFindIndex(array, predicate, fromIndex, fromRight) {
    var length = array.length,
        index = fromIndex + (fromRight ? 1 : -1);

    while ((fromRight ? index-- : ++index < length)) {
      if (predicate(array[index], index, array)) {
        return index;
      }
    }
    return -1;
  }

  /**
   * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseIndexOf(array, value, fromIndex) {
    return value === value
      ? strictIndexOf(array, value, fromIndex)
      : baseFindIndex(array, baseIsNaN, fromIndex);
  }

  /**
   * This function is like `baseIndexOf` except that it accepts a comparator.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @param {Function} comparator The comparator invoked per element.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseIndexOfWith(array, value, fromIndex, comparator) {
    var index = fromIndex - 1,
        length = array.length;

    while (++index < length) {
      if (comparator(array[index], value)) {
        return index;
      }
    }
    return -1;
  }

  /**
   * The base implementation of `_.isNaN` without support for number objects.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
   */
  function baseIsNaN(value) {
    return value !== value;
  }

  /**
   * The base implementation of `_.mean` and `_.meanBy` without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} array The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {number} Returns the mean.
   */
  function baseMean(array, iteratee) {
    var length = array == null ? 0 : array.length;
    return length ? (baseSum(array, iteratee) / length) : NAN;
  }

  /**
   * The base implementation of `_.property` without support for deep paths.
   *
   * @private
   * @param {string} key The key of the property to get.
   * @returns {Function} Returns the new accessor function.
   */
  function baseProperty(key) {
    return function(object) {
      return object == null ? undefined : object[key];
    };
  }

  /**
   * The base implementation of `_.propertyOf` without support for deep paths.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Function} Returns the new accessor function.
   */
  function basePropertyOf(object) {
    return function(key) {
      return object == null ? undefined : object[key];
    };
  }

  /**
   * The base implementation of `_.reduce` and `_.reduceRight`, without support
   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
   *
   * @private
   * @param {Array|Object} collection The collection to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {*} accumulator The initial value.
   * @param {boolean} initAccum Specify using the first or last element of
   *  `collection` as the initial value.
   * @param {Function} eachFunc The function to iterate over `collection`.
   * @returns {*} Returns the accumulated value.
   */
  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
    eachFunc(collection, function(value, index, collection) {
      accumulator = initAccum
        ? (initAccum = false, value)
        : iteratee(accumulator, value, index, collection);
    });
    return accumulator;
  }

  /**
   * The base implementation of `_.sortBy` which uses `comparer` to define the
   * sort order of `array` and replaces criteria objects with their corresponding
   * values.
   *
   * @private
   * @param {Array} array The array to sort.
   * @param {Function} comparer The function to define sort order.
   * @returns {Array} Returns `array`.
   */
  function baseSortBy(array, comparer) {
    var length = array.length;

    array.sort(comparer);
    while (length--) {
      array[length] = array[length].value;
    }
    return array;
  }

  /**
   * The base implementation of `_.sum` and `_.sumBy` without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} array The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {number} Returns the sum.
   */
  function baseSum(array, iteratee) {
    var result,
        index = -1,
        length = array.length;

    while (++index < length) {
      var current = iteratee(array[index]);
      if (current !== undefined) {
        result = result === undefined ? current : (result + current);
      }
    }
    return result;
  }

  /**
   * The base implementation of `_.times` without support for iteratee shorthands
   * or max array length checks.
   *
   * @private
   * @param {number} n The number of times to invoke `iteratee`.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns the array of results.
   */
  function baseTimes(n, iteratee) {
    var index = -1,
        result = Array(n);

    while (++index < n) {
      result[index] = iteratee(index);
    }
    return result;
  }

  /**
   * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
   * of key-value pairs for `object` corresponding to the property names of `props`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Array} props The property names to get values for.
   * @returns {Object} Returns the key-value pairs.
   */
  function baseToPairs(object, props) {
    return arrayMap(props, function(key) {
      return [key, object[key]];
    });
  }

  /**
   * The base implementation of `_.unary` without support for storing metadata.
   *
   * @private
   * @param {Function} func The function to cap arguments for.
   * @returns {Function} Returns the new capped function.
   */
  function baseUnary(func) {
    return function(value) {
      return func(value);
    };
  }

  /**
   * The base implementation of `_.values` and `_.valuesIn` which creates an
   * array of `object` property values corresponding to the property names
   * of `props`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Array} props The property names to get values for.
   * @returns {Object} Returns the array of property values.
   */
  function baseValues(object, props) {
    return arrayMap(props, function(key) {
      return object[key];
    });
  }

  /**
   * Checks if a `cache` value for `key` exists.
   *
   * @private
   * @param {Object} cache The cache to query.
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function cacheHas(cache, key) {
    return cache.has(key);
  }

  /**
   * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
   * that is not found in the character symbols.
   *
   * @private
   * @param {Array} strSymbols The string symbols to inspect.
   * @param {Array} chrSymbols The character symbols to find.
   * @returns {number} Returns the index of the first unmatched string symbol.
   */
  function charsStartIndex(strSymbols, chrSymbols) {
    var index = -1,
        length = strSymbols.length;

    while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
    return index;
  }

  /**
   * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
   * that is not found in the character symbols.
   *
   * @private
   * @param {Array} strSymbols The string symbols to inspect.
   * @param {Array} chrSymbols The character symbols to find.
   * @returns {number} Returns the index of the last unmatched string symbol.
   */
  function charsEndIndex(strSymbols, chrSymbols) {
    var index = strSymbols.length;

    while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
    return index;
  }

  /**
   * Gets the number of `placeholder` occurrences in `array`.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} placeholder The placeholder to search for.
   * @returns {number} Returns the placeholder count.
   */
  function countHolders(array, placeholder) {
    var length = array.length,
        result = 0;

    while (length--) {
      if (array[length] === placeholder) {
        ++result;
      }
    }
    return result;
  }

  /**
   * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
   * letters to basic Latin letters.
   *
   * @private
   * @param {string} letter The matched letter to deburr.
   * @returns {string} Returns the deburred letter.
   */
  var deburrLetter = basePropertyOf(deburredLetters);

  /**
   * Used by `_.escape` to convert characters to HTML entities.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  var escapeHtmlChar = basePropertyOf(htmlEscapes);

  /**
   * Used by `_.template` to escape characters for inclusion in compiled string literals.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  function escapeStringChar(chr) {
    return '\\' + stringEscapes[chr];
  }

  /**
   * Gets the value at `key` of `object`.
   *
   * @private
   * @param {Object} [object] The object to query.
   * @param {string} key The key of the property to get.
   * @returns {*} Returns the property value.
   */
  function getValue(object, key) {
    return object == null ? undefined : object[key];
  }

  /**
   * Checks if `string` contains Unicode symbols.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {boolean} Returns `true` if a symbol is found, else `false`.
   */
  function hasUnicode(string) {
    return reHasUnicode.test(string);
  }

  /**
   * Checks if `string` contains a word composed of Unicode symbols.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {boolean} Returns `true` if a word is found, else `false`.
   */
  function hasUnicodeWord(string) {
    return reHasUnicodeWord.test(string);
  }

  /**
   * Converts `iterator` to an array.
   *
   * @private
   * @param {Object} iterator The iterator to convert.
   * @returns {Array} Returns the converted array.
   */
  function iteratorToArray(iterator) {
    var data,
        result = [];

    while (!(data = iterator.next()).done) {
      result.push(data.value);
    }
    return result;
  }

  /**
   * Converts `map` to its key-value pairs.
   *
   * @private
   * @param {Object} map The map to convert.
   * @returns {Array} Returns the key-value pairs.
   */
  function mapToArray(map) {
    var index = -1,
        result = Array(map.size);

    map.forEach(function(value, key) {
      result[++index] = [key, value];
    });
    return result;
  }

  /**
   * Creates a unary function that invokes `func` with its argument transformed.
   *
   * @private
   * @param {Function} func The function to wrap.
   * @param {Function} transform The argument transform.
   * @returns {Function} Returns the new function.
   */
  function overArg(func, transform) {
    return function(arg) {
      return func(transform(arg));
    };
  }

  /**
   * Replaces all `placeholder` elements in `array` with an internal placeholder
   * and returns an array of their indexes.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {*} placeholder The placeholder to replace.
   * @returns {Array} Returns the new array of placeholder indexes.
   */
  function replaceHolders(array, placeholder) {
    var index = -1,
        length = array.length,
        resIndex = 0,
        result = [];

    while (++index < length) {
      var value = array[index];
      if (value === placeholder || value === PLACEHOLDER) {
        array[index] = PLACEHOLDER;
        result[resIndex++] = index;
      }
    }
    return result;
  }

  /**
   * Converts `set` to an array of its values.
   *
   * @private
   * @param {Object} set The set to convert.
   * @returns {Array} Returns the values.
   */
  function setToArray(set) {
    var index = -1,
        result = Array(set.size);

    set.forEach(function(value) {
      result[++index] = value;
    });
    return result;
  }

  /**
   * Converts `set` to its value-value pairs.
   *
   * @private
   * @param {Object} set The set to convert.
   * @returns {Array} Returns the value-value pairs.
   */
  function setToPairs(set) {
    var index = -1,
        result = Array(set.size);

    set.forEach(function(value) {
      result[++index] = [value, value];
    });
    return result;
  }

  /**
   * A specialized version of `_.indexOf` which performs strict equality
   * comparisons of values, i.e. `===`.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function strictIndexOf(array, value, fromIndex) {
    var index = fromIndex - 1,
        length = array.length;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }

  /**
   * A specialized version of `_.lastIndexOf` which performs strict equality
   * comparisons of values, i.e. `===`.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function strictLastIndexOf(array, value, fromIndex) {
    var index = fromIndex + 1;
    while (index--) {
      if (array[index] === value) {
        return index;
      }
    }
    return index;
  }

  /**
   * Gets the number of symbols in `string`.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {number} Returns the string size.
   */
  function stringSize(string) {
    return hasUnicode(string)
      ? unicodeSize(string)
      : asciiSize(string);
  }

  /**
   * Converts `string` to an array.
   *
   * @private
   * @param {string} string The string to convert.
   * @returns {Array} Returns the converted array.
   */
  function stringToArray(string) {
    return hasUnicode(string)
      ? unicodeToArray(string)
      : asciiToArray(string);
  }

  /**
   * Used by `_.unescape` to convert HTML entities to characters.
   *
   * @private
   * @param {string} chr The matched character to unescape.
   * @returns {string} Returns the unescaped character.
   */
  var unescapeHtmlChar = basePropertyOf(htmlUnescapes);

  /**
   * Gets the size of a Unicode `string`.
   *
   * @private
   * @param {string} string The string inspect.
   * @returns {number} Returns the string size.
   */
  function unicodeSize(string) {
    var result = reUnicode.lastIndex = 0;
    while (reUnicode.test(string)) {
      ++result;
    }
    return result;
  }

  /**
   * Converts a Unicode `string` to an array.
   *
   * @private
   * @param {string} string The string to convert.
   * @returns {Array} Returns the converted array.
   */
  function unicodeToArray(string) {
    return string.match(reUnicode) || [];
  }

  /**
   * Splits a Unicode `string` into an array of its words.
   *
   * @private
   * @param {string} The string to inspect.
   * @returns {Array} Returns the words of `string`.
   */
  function unicodeWords(string) {
    return string.match(reUnicodeWord) || [];
  }

  /*--------------------------------------------------------------------------*/

  /**
   * Create a new pristine `lodash` function using the `context` object.
   *
   * @static
   * @memberOf _
   * @since 1.1.0
   * @category Util
   * @param {Object} [context=root] The context object.
   * @returns {Function} Returns a new `lodash` function.
   * @example
   *
   * _.mixin({ 'foo': _.constant('foo') });
   *
   * var lodash = _.runInContext();
   * lodash.mixin({ 'bar': lodash.constant('bar') });
   *
   * _.isFunction(_.foo);
   * // => true
   * _.isFunction(_.bar);
   * // => false
   *
   * lodash.isFunction(lodash.foo);
   * // => false
   * lodash.isFunction(lodash.bar);
   * // => true
   *
   * // Create a suped-up `defer` in Node.js.
   * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
   */
  var runInContext = (function runInContext(context) {
    context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));

    /** Built-in constructor references. */
    var Array = context.Array,
        Date = context.Date,
        Error = context.Error,
        Function = context.Function,
        Math = context.Math,
        Object = context.Object,
        RegExp = context.RegExp,
        String = context.String,
        TypeError = context.TypeError;

    /** Used for built-in method references. */
    var arrayProto = Array.prototype,
        funcProto = Function.prototype,
        objectProto = Object.prototype;

    /** Used to detect overreaching core-js shims. */
    var coreJsData = context['__core-js_shared__'];

    /** Used to resolve the decompiled source of functions. */
    var funcToString = funcProto.toString;

    /** Used to check objects for own properties. */
    var hasOwnProperty = objectProto.hasOwnProperty;

    /** Used to generate unique IDs. */
    var idCounter = 0;

    /** Used to detect methods masquerading as native. */
    var maskSrcKey = (function() {
      var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
      return uid ? ('Symbol(src)_1.' + uid) : '';
    }());

    /**
     * Used to resolve the
     * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
     * of values.
     */
    var nativeObjectToString = objectProto.toString;

    /** Used to infer the `Object` constructor. */
    var objectCtorString = funcToString.call(Object);

    /** Used to restore the original `_` reference in `_.noConflict`. */
    var oldDash = root._;

    /** Used to detect if a method is native. */
    var reIsNative = RegExp('^' +
      funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
      .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
    );

    /** Built-in value references. */
    var Buffer = moduleExports ? context.Buffer : undefined,
        Symbol = context.Symbol,
        Uint8Array = context.Uint8Array,
        allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
        getPrototype = overArg(Object.getPrototypeOf, Object),
        objectCreate = Object.create,
        propertyIsEnumerable = objectProto.propertyIsEnumerable,
        splice = arrayProto.splice,
        spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
        symIterator = Symbol ? Symbol.iterator : undefined,
        symToStringTag = Symbol ? Symbol.toStringTag : undefined;

    var defineProperty = (function() {
      try {
        var func = getNative(Object, 'defineProperty');
        func({}, '', {});
        return func;
      } catch (e) {}
    }());

    /** Mocked built-ins. */
    var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
        ctxNow = Date && Date.now !== root.Date.now && Date.now,
        ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;

    /* Built-in method references for those with the same name as other `lodash` methods. */
    var nativeCeil = Math.ceil,
        nativeFloor = Math.floor,
        nativeGetSymbols = Object.getOwnPropertySymbols,
        nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
        nativeIsFinite = context.isFinite,
        nativeJoin = arrayProto.join,
        nativeKeys = overArg(Object.keys, Object),
        nativeMax = Math.max,
        nativeMin = Math.min,
        nativeNow = Date.now,
        nativeParseInt = context.parseInt,
        nativeRandom = Math.random,
        nativeReverse = arrayProto.reverse;

    /* Built-in method references that are verified to be native. */
    var DataView = getNative(context, 'DataView'),
        Map = getNative(context, 'Map'),
        Promise = getNative(context, 'Promise'),
        Set = getNative(context, 'Set'),
        WeakMap = getNative(context, 'WeakMap'),
        nativeCreate = getNative(Object, 'create');

    /** Used to store function metadata. */
    var metaMap = WeakMap && new WeakMap;

    /** Used to lookup unminified function names. */
    var realNames = {};

    /** Used to detect maps, sets, and weakmaps. */
    var dataViewCtorString = toSource(DataView),
        mapCtorString = toSource(Map),
        promiseCtorString = toSource(Promise),
        setCtorString = toSource(Set),
        weakMapCtorString = toSource(WeakMap);

    /** Used to convert symbols to primitives and strings. */
    var symbolProto = Symbol ? Symbol.prototype : undefined,
        symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
        symbolToString = symbolProto ? symbolProto.toString : undefined;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object which wraps `value` to enable implicit method
     * chain sequences. Methods that operate on and return arrays, collections,
     * and functions can be chained together. Methods that retrieve a single value
     * or may return a primitive value will automatically end the chain sequence
     * and return the unwrapped value. Otherwise, the value must be unwrapped
     * with `_#value`.
     *
     * Explicit chain sequences, which must be unwrapped with `_#value`, may be
     * enabled using `_.chain`.
     *
     * The execution of chained methods is lazy, that is, it's deferred until
     * `_#value` is implicitly or explicitly called.
     *
     * Lazy evaluation allows several methods to support shortcut fusion.
     * Shortcut fusion is an optimization to merge iteratee calls; this avoids
     * the creation of intermediate arrays and can greatly reduce the number of
     * iteratee executions. Sections of a chain sequence qualify for shortcut
     * fusion if the section is applied to an array and iteratees accept only
     * one argument. The heuristic for whether a section qualifies for shortcut
     * fusion is subject to change.
     *
     * Chaining is supported in custom builds as long as the `_#value` method is
     * directly or indirectly included in the build.
     *
     * In addition to lodash methods, wrappers have `Array` and `String` methods.
     *
     * The wrapper `Array` methods are:
     * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
     *
     * The wrapper `String` methods are:
     * `replace` and `split`
     *
     * The wrapper methods that support shortcut fusion are:
     * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
     * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
     * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
     *
     * The chainable wrapper methods are:
     * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
     * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
     * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
     * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
     * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
     * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
     * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
     * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
     * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
     * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
     * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
     * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
     * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
     * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
     * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
     * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
     * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
     * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
     * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
     * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
     * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
     * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
     * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
     * `zipObject`, `zipObjectDeep`, and `zipWith`
     *
     * The wrapper methods that are **not** chainable by default are:
     * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
     * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
     * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
     * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
     * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
     * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
     * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
     * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
     * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
     * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
     * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
     * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
     * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
     * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
     * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
     * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
     * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
     * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
     * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
     * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
     * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
     * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
     * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
     * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
     * `upperFirst`, `value`, and `words`
     *
     * @name _
     * @constructor
     * @category Seq
     * @param {*} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var wrapped = _([1, 2, 3]);
     *
     * // Returns an unwrapped value.
     * wrapped.reduce(_.add);
     * // => 6
     *
     * // Returns a wrapped value.
     * var squares = wrapped.map(square);
     *
     * _.isArray(squares);
     * // => false
     *
     * _.isArray(squares.value());
     * // => true
     */
    function lodash(value) {
      if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
        if (value instanceof LodashWrapper) {
          return value;
        }
        if (hasOwnProperty.call(value, '__wrapped__')) {
          return wrapperClone(value);
        }
      }
      return new LodashWrapper(value);
    }

    /**
     * The base implementation of `_.create` without support for assigning
     * properties to the created object.
     *
     * @private
     * @param {Object} proto The object to inherit from.
     * @returns {Object} Returns the new object.
     */
    var baseCreate = (function() {
      function object() {}
      return function(proto) {
        if (!isObject(proto)) {
          return {};
        }
        if (objectCreate) {
          return objectCreate(proto);
        }
        object.prototype = proto;
        var result = new object;
        object.prototype = undefined;
        return result;
      };
    }());

    /**
     * The function whose prototype chain sequence wrappers inherit from.
     *
     * @private
     */
    function baseLodash() {
      // No operation performed.
    }

    /**
     * The base constructor for creating `lodash` wrapper objects.
     *
     * @private
     * @param {*} value The value to wrap.
     * @param {boolean} [chainAll] Enable explicit method chain sequences.
     */
    function LodashWrapper(value, chainAll) {
      this.__wrapped__ = value;
      this.__actions__ = [];
      this.__chain__ = !!chainAll;
      this.__index__ = 0;
      this.__values__ = undefined;
    }

    /**
     * By default, the template delimiters used by lodash are like those in
     * embedded Ruby (ERB) as well as ES2015 template strings. Change the
     * following template settings to use alternative delimiters.
     *
     * @static
     * @memberOf _
     * @type {Object}
     */
    lodash.templateSettings = {

      /**
       * Used to detect `data` property values to be HTML-escaped.
       *
       * @memberOf _.templateSettings
       * @type {RegExp}
       */
      'escape': reEscape,

      /**
       * Used to detect code to be evaluated.
       *
       * @memberOf _.templateSettings
       * @type {RegExp}
       */
      'evaluate': reEvaluate,

      /**
       * Used to detect `data` property values to inject.
       *
       * @memberOf _.templateSettings
       * @type {RegExp}
       */
      'interpolate': reInterpolate,

      /**
       * Used to reference the data object in the template text.
       *
       * @memberOf _.templateSettings
       * @type {string}
       */
      'variable': '',

      /**
       * Used to import variables into the compiled template.
       *
       * @memberOf _.templateSettings
       * @type {Object}
       */
      'imports': {

        /**
         * A reference to the `lodash` function.
         *
         * @memberOf _.templateSettings.imports
         * @type {Function}
         */
        '_': lodash
      }
    };

    // Ensure wrappers are instances of `baseLodash`.
    lodash.prototype = baseLodash.prototype;
    lodash.prototype.constructor = lodash;

    LodashWrapper.prototype = baseCreate(baseLodash.prototype);
    LodashWrapper.prototype.constructor = LodashWrapper;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
     *
     * @private
     * @constructor
     * @param {*} value The value to wrap.
     */
    function LazyWrapper(value) {
      this.__wrapped__ = value;
      this.__actions__ = [];
      this.__dir__ = 1;
      this.__filtered__ = false;
      this.__iteratees__ = [];
      this.__takeCount__ = MAX_ARRAY_LENGTH;
      this.__views__ = [];
    }

    /**
     * Creates a clone of the lazy wrapper object.
     *
     * @private
     * @name clone
     * @memberOf LazyWrapper
     * @returns {Object} Returns the cloned `LazyWrapper` object.
     */
    function lazyClone() {
      var result = new LazyWrapper(this.__wrapped__);
      result.__actions__ = copyArray(this.__actions__);
      result.__dir__ = this.__dir__;
      result.__filtered__ = this.__filtered__;
      result.__iteratees__ = copyArray(this.__iteratees__);
      result.__takeCount__ = this.__takeCount__;
      result.__views__ = copyArray(this.__views__);
      return result;
    }

    /**
     * Reverses the direction of lazy iteration.
     *
     * @private
     * @name reverse
     * @memberOf LazyWrapper
     * @returns {Object} Returns the new reversed `LazyWrapper` object.
     */
    function lazyReverse() {
      if (this.__filtered__) {
        var result = new LazyWrapper(this);
        result.__dir__ = -1;
        result.__filtered__ = true;
      } else {
        result = this.clone();
        result.__dir__ *= -1;
      }
      return result;
    }

    /**
     * Extracts the unwrapped value from its lazy wrapper.
     *
     * @private
     * @name value
     * @memberOf LazyWrapper
     * @returns {*} Returns the unwrapped value.
     */
    function lazyValue() {
      var array = this.__wrapped__.value(),
          dir = this.__dir__,
          isArr = isArray(array),
          isRight = dir < 0,
          arrLength = isArr ? array.length : 0,
          view = getView(0, arrLength, this.__views__),
          start = view.start,
          end = view.end,
          length = end - start,
          index = isRight ? end : (start - 1),
          iteratees = this.__iteratees__,
          iterLength = iteratees.length,
          resIndex = 0,
          takeCount = nativeMin(length, this.__takeCount__);

      if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
        return baseWrapperValue(array, this.__actions__);
      }
      var result = [];

      outer:
      while (length-- && resIndex < takeCount) {
        index += dir;

        var iterIndex = -1,
            value = array[index];

        while (++iterIndex < iterLength) {
          var data = iteratees[iterIndex],
              iteratee = data.iteratee,
              type = data.type,
              computed = iteratee(value);

          if (type == LAZY_MAP_FLAG) {
            value = computed;
          } else if (!computed) {
            if (type == LAZY_FILTER_FLAG) {
              continue outer;
            } else {
              break outer;
            }
          }
        }
        result[resIndex++] = value;
      }
      return result;
    }

    // Ensure `LazyWrapper` is an instance of `baseLodash`.
    LazyWrapper.prototype = baseCreate(baseLodash.prototype);
    LazyWrapper.prototype.constructor = LazyWrapper;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a hash object.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function Hash(entries) {
      var index = -1,
          length = entries == null ? 0 : entries.length;

      this.clear();
      while (++index < length) {
        var entry = entries[index];
        this.set(entry[0], entry[1]);
      }
    }

    /**
     * Removes all key-value entries from the hash.
     *
     * @private
     * @name clear
     * @memberOf Hash
     */
    function hashClear() {
      this.__data__ = nativeCreate ? nativeCreate(null) : {};
      this.size = 0;
    }

    /**
     * Removes `key` and its value from the hash.
     *
     * @private
     * @name delete
     * @memberOf Hash
     * @param {Object} hash The hash to modify.
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function hashDelete(key) {
      var result = this.has(key) && delete this.__data__[key];
      this.size -= result ? 1 : 0;
      return result;
    }

    /**
     * Gets the hash value for `key`.
     *
     * @private
     * @name get
     * @memberOf Hash
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function hashGet(key) {
      var data = this.__data__;
      if (nativeCreate) {
        var result = data[key];
        return result === HASH_UNDEFINED ? undefined : result;
      }
      return hasOwnProperty.call(data, key) ? data[key] : undefined;
    }

    /**
     * Checks if a hash value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf Hash
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function hashHas(key) {
      var data = this.__data__;
      return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
    }

    /**
     * Sets the hash `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf Hash
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the hash instance.
     */
    function hashSet(key, value) {
      var data = this.__data__;
      this.size += this.has(key) ? 0 : 1;
      data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
      return this;
    }

    // Add methods to `Hash`.
    Hash.prototype.clear = hashClear;
    Hash.prototype['delete'] = hashDelete;
    Hash.prototype.get = hashGet;
    Hash.prototype.has = hashHas;
    Hash.prototype.set = hashSet;

    /*------------------------------------------------------------------------*/

    /**
     * Creates an list cache object.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function ListCache(entries) {
      var index = -1,
          length = entries == null ? 0 : entries.length;

      this.clear();
      while (++index < length) {
        var entry = entries[index];
        this.set(entry[0], entry[1]);
      }
    }

    /**
     * Removes all key-value entries from the list cache.
     *
     * @private
     * @name clear
     * @memberOf ListCache
     */
    function listCacheClear() {
      this.__data__ = [];
      this.size = 0;
    }

    /**
     * Removes `key` and its value from the list cache.
     *
     * @private
     * @name delete
     * @memberOf ListCache
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function listCacheDelete(key) {
      var data = this.__data__,
          index = assocIndexOf(data, key);

      if (index < 0) {
        return false;
      }
      var lastIndex = data.length - 1;
      if (index == lastIndex) {
        data.pop();
      } else {
        splice.call(data, index, 1);
      }
      --this.size;
      return true;
    }

    /**
     * Gets the list cache value for `key`.
     *
     * @private
     * @name get
     * @memberOf ListCache
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function listCacheGet(key) {
      var data = this.__data__,
          index = assocIndexOf(data, key);

      return index < 0 ? undefined : data[index][1];
    }

    /**
     * Checks if a list cache value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf ListCache
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function listCacheHas(key) {
      return assocIndexOf(this.__data__, key) > -1;
    }

    /**
     * Sets the list cache `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf ListCache
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the list cache instance.
     */
    function listCacheSet(key, value) {
      var data = this.__data__,
          index = assocIndexOf(data, key);

      if (index < 0) {
        ++this.size;
        data.push([key, value]);
      } else {
        data[index][1] = value;
      }
      return this;
    }

    // Add methods to `ListCache`.
    ListCache.prototype.clear = listCacheClear;
    ListCache.prototype['delete'] = listCacheDelete;
    ListCache.prototype.get = listCacheGet;
    ListCache.prototype.has = listCacheHas;
    ListCache.prototype.set = listCacheSet;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a map cache object to store key-value pairs.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function MapCache(entries) {
      var index = -1,
          length = entries == null ? 0 : entries.length;

      this.clear();
      while (++index < length) {
        var entry = entries[index];
        this.set(entry[0], entry[1]);
      }
    }

    /**
     * Removes all key-value entries from the map.
     *
     * @private
     * @name clear
     * @memberOf MapCache
     */
    function mapCacheClear() {
      this.size = 0;
      this.__data__ = {
        'hash': new Hash,
        'map': new (Map || ListCache),
        'string': new Hash
      };
    }

    /**
     * Removes `key` and its value from the map.
     *
     * @private
     * @name delete
     * @memberOf MapCache
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function mapCacheDelete(key) {
      var result = getMapData(this, key)['delete'](key);
      this.size -= result ? 1 : 0;
      return result;
    }

    /**
     * Gets the map value for `key`.
     *
     * @private
     * @name get
     * @memberOf MapCache
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function mapCacheGet(key) {
      return getMapData(this, key).get(key);
    }

    /**
     * Checks if a map value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf MapCache
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function mapCacheHas(key) {
      return getMapData(this, key).has(key);
    }

    /**
     * Sets the map `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf MapCache
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the map cache instance.
     */
    function mapCacheSet(key, value) {
      var data = getMapData(this, key),
          size = data.size;

      data.set(key, value);
      this.size += data.size == size ? 0 : 1;
      return this;
    }

    // Add methods to `MapCache`.
    MapCache.prototype.clear = mapCacheClear;
    MapCache.prototype['delete'] = mapCacheDelete;
    MapCache.prototype.get = mapCacheGet;
    MapCache.prototype.has = mapCacheHas;
    MapCache.prototype.set = mapCacheSet;

    /*------------------------------------------------------------------------*/

    /**
     *
     * Creates an array cache object to store unique values.
     *
     * @private
     * @constructor
     * @param {Array} [values] The values to cache.
     */
    function SetCache(values) {
      var index = -1,
          length = values == null ? 0 : values.length;

      this.__data__ = new MapCache;
      while (++index < length) {
        this.add(values[index]);
      }
    }

    /**
     * Adds `value` to the array cache.
     *
     * @private
     * @name add
     * @memberOf SetCache
     * @alias push
     * @param {*} value The value to cache.
     * @returns {Object} Returns the cache instance.
     */
    function setCacheAdd(value) {
      this.__data__.set(value, HASH_UNDEFINED);
      return this;
    }

    /**
     * Checks if `value` is in the array cache.
     *
     * @private
     * @name has
     * @memberOf SetCache
     * @param {*} value The value to search for.
     * @returns {number} Returns `true` if `value` is found, else `false`.
     */
    function setCacheHas(value) {
      return this.__data__.has(value);
    }

    // Add methods to `SetCache`.
    SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
    SetCache.prototype.has = setCacheHas;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a stack cache object to store key-value pairs.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function Stack(entries) {
      var data = this.__data__ = new ListCache(entries);
      this.size = data.size;
    }

    /**
     * Removes all key-value entries from the stack.
     *
     * @private
     * @name clear
     * @memberOf Stack
     */
    function stackClear() {
      this.__data__ = new ListCache;
      this.size = 0;
    }

    /**
     * Removes `key` and its value from the stack.
     *
     * @private
     * @name delete
     * @memberOf Stack
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function stackDelete(key) {
      var data = this.__data__,
          result = data['delete'](key);

      this.size = data.size;
      return result;
    }

    /**
     * Gets the stack value for `key`.
     *
     * @private
     * @name get
     * @memberOf Stack
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function stackGet(key) {
      return this.__data__.get(key);
    }

    /**
     * Checks if a stack value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf Stack
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function stackHas(key) {
      return this.__data__.has(key);
    }

    /**
     * Sets the stack `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf Stack
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the stack cache instance.
     */
    function stackSet(key, value) {
      var data = this.__data__;
      if (data instanceof ListCache) {
        var pairs = data.__data__;
        if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
          pairs.push([key, value]);
          this.size = ++data.size;
          return this;
        }
        data = this.__data__ = new MapCache(pairs);
      }
      data.set(key, value);
      this.size = data.size;
      return this;
    }

    // Add methods to `Stack`.
    Stack.prototype.clear = stackClear;
    Stack.prototype['delete'] = stackDelete;
    Stack.prototype.get = stackGet;
    Stack.prototype.has = stackHas;
    Stack.prototype.set = stackSet;

    /*------------------------------------------------------------------------*/

    /**
     * Creates an array of the enumerable property names of the array-like `value`.
     *
     * @private
     * @param {*} value The value to query.
     * @param {boolean} inherited Specify returning inherited property names.
     * @returns {Array} Returns the array of property names.
     */
    function arrayLikeKeys(value, inherited) {
      var isArr = isArray(value),
          isArg = !isArr && isArguments(value),
          isBuff = !isArr && !isArg && isBuffer(value),
          isType = !isArr && !isArg && !isBuff && isTypedArray(value),
          skipIndexes = isArr || isArg || isBuff || isType,
          result = skipIndexes ? baseTimes(value.length, String) : [],
          length = result.length;

      for (var key in value) {
        if ((inherited || hasOwnProperty.call(value, key)) &&
            !(skipIndexes && (
               // Safari 9 has enumerable `arguments.length` in strict mode.
               key == 'length' ||
               // Node.js 0.10 has enumerable non-index properties on buffers.
               (isBuff && (key == 'offset' || key == 'parent')) ||
               // PhantomJS 2 has enumerable non-index properties on typed arrays.
               (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
               // Skip index properties.
               isIndex(key, length)
            ))) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * A specialized version of `_.sample` for arrays.
     *
     * @private
     * @param {Array} array The array to sample.
     * @returns {*} Returns the random element.
     */
    function arraySample(array) {
      var length = array.length;
      return length ? array[baseRandom(0, length - 1)] : undefined;
    }

    /**
     * A specialized version of `_.sampleSize` for arrays.
     *
     * @private
     * @param {Array} array The array to sample.
     * @param {number} n The number of elements to sample.
     * @returns {Array} Returns the random elements.
     */
    function arraySampleSize(array, n) {
      return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
    }

    /**
     * A specialized version of `_.shuffle` for arrays.
     *
     * @private
     * @param {Array} array The array to shuffle.
     * @returns {Array} Returns the new shuffled array.
     */
    function arrayShuffle(array) {
      return shuffleSelf(copyArray(array));
    }

    /**
     * This function is like `assignValue` except that it doesn't assign
     * `undefined` values.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {string} key The key of the property to assign.
     * @param {*} value The value to assign.
     */
    function assignMergeValue(object, key, value) {
      if ((value !== undefined && !eq(object[key], value)) ||
          (value === undefined && !(key in object))) {
        baseAssignValue(object, key, value);
      }
    }

    /**
     * Assigns `value` to `key` of `object` if the existing value is not equivalent
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {string} key The key of the property to assign.
     * @param {*} value The value to assign.
     */
    function assignValue(object, key, value) {
      var objValue = object[key];
      if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
          (value === undefined && !(key in object))) {
        baseAssignValue(object, key, value);
      }
    }

    /**
     * Gets the index at which the `key` is found in `array` of key-value pairs.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} key The key to search for.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function assocIndexOf(array, key) {
      var length = array.length;
      while (length--) {
        if (eq(array[length][0], key)) {
          return length;
        }
      }
      return -1;
    }

    /**
     * Aggregates elements of `collection` on `accumulator` with keys transformed
     * by `iteratee` and values set by `setter`.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} setter The function to set `accumulator` values.
     * @param {Function} iteratee The iteratee to transform keys.
     * @param {Object} accumulator The initial aggregated object.
     * @returns {Function} Returns `accumulator`.
     */
    function baseAggregator(collection, setter, iteratee, accumulator) {
      baseEach(collection, function(value, key, collection) {
        setter(accumulator, value, iteratee(value), collection);
      });
      return accumulator;
    }

    /**
     * The base implementation of `_.assign` without support for multiple sources
     * or `customizer` functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @returns {Object} Returns `object`.
     */
    function baseAssign(object, source) {
      return object && copyObject(source, keys(source), object);
    }

    /**
     * The base implementation of `_.assignIn` without support for multiple sources
     * or `customizer` functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @returns {Object} Returns `object`.
     */
    function baseAssignIn(object, source) {
      return object && copyObject(source, keysIn(source), object);
    }

    /**
     * The base implementation of `assignValue` and `assignMergeValue` without
     * value checks.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {string} key The key of the property to assign.
     * @param {*} value The value to assign.
     */
    function baseAssignValue(object, key, value) {
      if (key == '__proto__' && defineProperty) {
        defineProperty(object, key, {
          'configurable': true,
          'enumerable': true,
          'value': value,
          'writable': true
        });
      } else {
        object[key] = value;
      }
    }

    /**
     * The base implementation of `_.at` without support for individual paths.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {string[]} paths The property paths to pick.
     * @returns {Array} Returns the picked elements.
     */
    function baseAt(object, paths) {
      var index = -1,
          length = paths.length,
          result = Array(length),
          skip = object == null;

      while (++index < length) {
        result[index] = skip ? undefined : get(object, paths[index]);
      }
      return result;
    }

    /**
     * The base implementation of `_.clamp` which doesn't coerce arguments.
     *
     * @private
     * @param {number} number The number to clamp.
     * @param {number} [lower] The lower bound.
     * @param {number} upper The upper bound.
     * @returns {number} Returns the clamped number.
     */
    function baseClamp(number, lower, upper) {
      if (number === number) {
        if (upper !== undefined) {
          number = number <= upper ? number : upper;
        }
        if (lower !== undefined) {
          number = number >= lower ? number : lower;
        }
      }
      return number;
    }

    /**
     * The base implementation of `_.clone` and `_.cloneDeep` which tracks
     * traversed objects.
     *
     * @private
     * @param {*} value The value to clone.
     * @param {boolean} bitmask The bitmask flags.
     *  1 - Deep clone
     *  2 - Flatten inherited properties
     *  4 - Clone symbols
     * @param {Function} [customizer] The function to customize cloning.
     * @param {string} [key] The key of `value`.
     * @param {Object} [object] The parent object of `value`.
     * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
     * @returns {*} Returns the cloned value.
     */
    function baseClone(value, bitmask, customizer, key, object, stack) {
      var result,
          isDeep = bitmask & CLONE_DEEP_FLAG,
          isFlat = bitmask & CLONE_FLAT_FLAG,
          isFull = bitmask & CLONE_SYMBOLS_FLAG;

      if (customizer) {
        result = object ? customizer(value, key, object, stack) : customizer(value);
      }
      if (result !== undefined) {
        return result;
      }
      if (!isObject(value)) {
        return value;
      }
      var isArr = isArray(value);
      if (isArr) {
        result = initCloneArray(value);
        if (!isDeep) {
          return copyArray(value, result);
        }
      } else {
        var tag = getTag(value),
            isFunc = tag == funcTag || tag == genTag;

        if (isBuffer(value)) {
          return cloneBuffer(value, isDeep);
        }
        if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
          result = (isFlat || isFunc) ? {} : initCloneObject(value);
          if (!isDeep) {
            return isFlat
              ? copySymbolsIn(value, baseAssignIn(result, value))
              : copySymbols(value, baseAssign(result, value));
          }
        } else {
          if (!cloneableTags[tag]) {
            return object ? value : {};
          }
          result = initCloneByTag(value, tag, isDeep);
        }
      }
      // Check for circular references and return its corresponding clone.
      stack || (stack = new Stack);
      var stacked = stack.get(value);
      if (stacked) {
        return stacked;
      }
      stack.set(value, result);

      if (isSet(value)) {
        value.forEach(function(subValue) {
          result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
        });
      } else if (isMap(value)) {
        value.forEach(function(subValue, key) {
          result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
        });
      }

      var keysFunc = isFull
        ? (isFlat ? getAllKeysIn : getAllKeys)
        : (isFlat ? keysIn : keys);

      var props = isArr ? undefined : keysFunc(value);
      arrayEach(props || value, function(subValue, key) {
        if (props) {
          key = subValue;
          subValue = value[key];
        }
        // Recursively populate clone (susceptible to call stack limits).
        assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
      });
      return result;
    }

    /**
     * The base implementation of `_.conforms` which doesn't clone `source`.
     *
     * @private
     * @param {Object} source The object of property predicates to conform to.
     * @returns {Function} Returns the new spec function.
     */
    function baseConforms(source) {
      var props = keys(source);
      return function(object) {
        return baseConformsTo(object, source, props);
      };
    }

    /**
     * The base implementation of `_.conformsTo` which accepts `props` to check.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property predicates to conform to.
     * @returns {boolean} Returns `true` if `object` conforms, else `false`.
     */
    function baseConformsTo(object, source, props) {
      var length = props.length;
      if (object == null) {
        return !length;
      }
      object = Object(object);
      while (length--) {
        var key = props[length],
            predicate = source[key],
            value = object[key];

        if ((value === undefined && !(key in object)) || !predicate(value)) {
          return false;
        }
      }
      return true;
    }

    /**
     * The base implementation of `_.delay` and `_.defer` which accepts `args`
     * to provide to `func`.
     *
     * @private
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @param {Array} args The arguments to provide to `func`.
     * @returns {number|Object} Returns the timer id or timeout object.
     */
    function baseDelay(func, wait, args) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return setTimeout(function() { func.apply(undefined, args); }, wait);
    }

    /**
     * The base implementation of methods like `_.difference` without support
     * for excluding multiple arrays or iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Array} values The values to exclude.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     */
    function baseDifference(array, values, iteratee, comparator) {
      var index = -1,
          includes = arrayIncludes,
          isCommon = true,
          length = array.length,
          result = [],
          valuesLength = values.length;

      if (!length) {
        return result;
      }
      if (iteratee) {
        values = arrayMap(values, baseUnary(iteratee));
      }
      if (comparator) {
        includes = arrayIncludesWith;
        isCommon = false;
      }
      else if (values.length >= LARGE_ARRAY_SIZE) {
        includes = cacheHas;
        isCommon = false;
        values = new SetCache(values);
      }
      outer:
      while (++index < length) {
        var value = array[index],
            computed = iteratee == null ? value : iteratee(value);

        value = (comparator || value !== 0) ? value : 0;
        if (isCommon && computed === computed) {
          var valuesIndex = valuesLength;
          while (valuesIndex--) {
            if (values[valuesIndex] === computed) {
              continue outer;
            }
          }
          result.push(value);
        }
        else if (!includes(values, computed, comparator)) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.forEach` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     */
    var baseEach = createBaseEach(baseForOwn);

    /**
     * The base implementation of `_.forEachRight` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     */
    var baseEachRight = createBaseEach(baseForOwnRight, true);

    /**
     * The base implementation of `_.every` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`
     */
    function baseEvery(collection, predicate) {
      var result = true;
      baseEach(collection, function(value, index, collection) {
        result = !!predicate(value, index, collection);
        return result;
      });
      return result;
    }

    /**
     * The base implementation of methods like `_.max` and `_.min` which accepts a
     * `comparator` to determine the extremum value.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The iteratee invoked per iteration.
     * @param {Function} comparator The comparator used to compare values.
     * @returns {*} Returns the extremum value.
     */
    function baseExtremum(array, iteratee, comparator) {
      var index = -1,
          length = array.length;

      while (++index < length) {
        var value = array[index],
            current = iteratee(value);

        if (current != null && (computed === undefined
              ? (current === current && !isSymbol(current))
              : comparator(current, computed)
            )) {
          var computed = current,
              result = value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.fill` without an iteratee call guard.
     *
     * @private
     * @param {Array} array The array to fill.
     * @param {*} value The value to fill `array` with.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns `array`.
     */
    function baseFill(array, value, start, end) {
      var length = array.length;

      start = toInteger(start);
      if (start < 0) {
        start = -start > length ? 0 : (length + start);
      }
      end = (end === undefined || end > length) ? length : toInteger(end);
      if (end < 0) {
        end += length;
      }
      end = start > end ? 0 : toLength(end);
      while (start < end) {
        array[start++] = value;
      }
      return array;
    }

    /**
     * The base implementation of `_.filter` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     */
    function baseFilter(collection, predicate) {
      var result = [];
      baseEach(collection, function(value, index, collection) {
        if (predicate(value, index, collection)) {
          result.push(value);
        }
      });
      return result;
    }

    /**
     * The base implementation of `_.flatten` with support for restricting flattening.
     *
     * @private
     * @param {Array} array The array to flatten.
     * @param {number} depth The maximum recursion depth.
     * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
     * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
     * @param {Array} [result=[]] The initial result value.
     * @returns {Array} Returns the new flattened array.
     */
    function baseFlatten(array, depth, predicate, isStrict, result) {
      var index = -1,
          length = array.length;

      predicate || (predicate = isFlattenable);
      result || (result = []);

      while (++index < length) {
        var value = array[index];
        if (depth > 0 && predicate(value)) {
          if (depth > 1) {
            // Recursively flatten arrays (susceptible to call stack limits).
            baseFlatten(value, depth - 1, predicate, isStrict, result);
          } else {
            arrayPush(result, value);
          }
        } else if (!isStrict) {
          result[result.length] = value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `baseForOwn` which iterates over `object`
     * properties returned by `keysFunc` and invokes `iteratee` for each property.
     * Iteratee functions may exit iteration early by explicitly returning `false`.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @returns {Object} Returns `object`.
     */
    var baseFor = createBaseFor();

    /**
     * This function is like `baseFor` except that it iterates over properties
     * in the opposite order.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @returns {Object} Returns `object`.
     */
    var baseForRight = createBaseFor(true);

    /**
     * The base implementation of `_.forOwn` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForOwn(object, iteratee) {
      return object && baseFor(object, iteratee, keys);
    }

    /**
     * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForOwnRight(object, iteratee) {
      return object && baseForRight(object, iteratee, keys);
    }

    /**
     * The base implementation of `_.functions` which creates an array of
     * `object` function property names filtered from `props`.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Array} props The property names to filter.
     * @returns {Array} Returns the function names.
     */
    function baseFunctions(object, props) {
      return arrayFilter(props, function(key) {
        return isFunction(object[key]);
      });
    }

    /**
     * The base implementation of `_.get` without support for default values.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to get.
     * @returns {*} Returns the resolved value.
     */
    function baseGet(object, path) {
      path = castPath(path, object);

      var index = 0,
          length = path.length;

      while (object != null && index < length) {
        object = object[toKey(path[index++])];
      }
      return (index && index == length) ? object : undefined;
    }

    /**
     * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
     * `keysFunc` and `symbolsFunc` to get the enumerable property names and
     * symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @param {Function} symbolsFunc The function to get the symbols of `object`.
     * @returns {Array} Returns the array of property names and symbols.
     */
    function baseGetAllKeys(object, keysFunc, symbolsFunc) {
      var result = keysFunc(object);
      return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
    }

    /**
     * The base implementation of `getTag` without fallbacks for buggy environments.
     *
     * @private
     * @param {*} value The value to query.
     * @returns {string} Returns the `toStringTag`.
     */
    function baseGetTag(value) {
      if (value == null) {
        return value === undefined ? undefinedTag : nullTag;
      }
      return (symToStringTag && symToStringTag in Object(value))
        ? getRawTag(value)
        : objectToString(value);
    }

    /**
     * The base implementation of `_.gt` which doesn't coerce arguments.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than `other`,
     *  else `false`.
     */
    function baseGt(value, other) {
      return value > other;
    }

    /**
     * The base implementation of `_.has` without support for deep paths.
     *
     * @private
     * @param {Object} [object] The object to query.
     * @param {Array|string} key The key to check.
     * @returns {boolean} Returns `true` if `key` exists, else `false`.
     */
    function baseHas(object, key) {
      return object != null && hasOwnProperty.call(object, key);
    }

    /**
     * The base implementation of `_.hasIn` without support for deep paths.
     *
     * @private
     * @param {Object} [object] The object to query.
     * @param {Array|string} key The key to check.
     * @returns {boolean} Returns `true` if `key` exists, else `false`.
     */
    function baseHasIn(object, key) {
      return object != null && key in Object(object);
    }

    /**
     * The base implementation of `_.inRange` which doesn't coerce arguments.
     *
     * @private
     * @param {number} number The number to check.
     * @param {number} start The start of the range.
     * @param {number} end The end of the range.
     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
     */
    function baseInRange(number, start, end) {
      return number >= nativeMin(start, end) && number < nativeMax(start, end);
    }

    /**
     * The base implementation of methods like `_.intersection`, without support
     * for iteratee shorthands, that accepts an array of arrays to inspect.
     *
     * @private
     * @param {Array} arrays The arrays to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of shared values.
     */
    function baseIntersection(arrays, iteratee, comparator) {
      var includes = comparator ? arrayIncludesWith : arrayIncludes,
          length = arrays[0].length,
          othLength = arrays.length,
          othIndex = othLength,
          caches = Array(othLength),
          maxLength = Infinity,
          result = [];

      while (othIndex--) {
        var array = arrays[othIndex];
        if (othIndex && iteratee) {
          array = arrayMap(array, baseUnary(iteratee));
        }
        maxLength = nativeMin(array.length, maxLength);
        caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
          ? new SetCache(othIndex && array)
          : undefined;
      }
      array = arrays[0];

      var index = -1,
          seen = caches[0];

      outer:
      while (++index < length && result.length < maxLength) {
        var value = array[index],
            computed = iteratee ? iteratee(value) : value;

        value = (comparator || value !== 0) ? value : 0;
        if (!(seen
              ? cacheHas(seen, computed)
              : includes(result, computed, comparator)
            )) {
          othIndex = othLength;
          while (--othIndex) {
            var cache = caches[othIndex];
            if (!(cache
                  ? cacheHas(cache, computed)
                  : includes(arrays[othIndex], computed, comparator))
                ) {
              continue outer;
            }
          }
          if (seen) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.invert` and `_.invertBy` which inverts
     * `object` with values transformed by `iteratee` and set by `setter`.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} setter The function to set `accumulator` values.
     * @param {Function} iteratee The iteratee to transform values.
     * @param {Object} accumulator The initial inverted object.
     * @returns {Function} Returns `accumulator`.
     */
    function baseInverter(object, setter, iteratee, accumulator) {
      baseForOwn(object, function(value, key, object) {
        setter(accumulator, iteratee(value), key, object);
      });
      return accumulator;
    }

    /**
     * The base implementation of `_.invoke` without support for individual
     * method arguments.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the method to invoke.
     * @param {Array} args The arguments to invoke the method with.
     * @returns {*} Returns the result of the invoked method.
     */
    function baseInvoke(object, path, args) {
      path = castPath(path, object);
      object = parent(object, path);
      var func = object == null ? object : object[toKey(last(path))];
      return func == null ? undefined : apply(func, object, args);
    }

    /**
     * The base implementation of `_.isArguments`.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an `arguments` object,
     */
    function baseIsArguments(value) {
      return isObjectLike(value) && baseGetTag(value) == argsTag;
    }

    /**
     * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
     */
    function baseIsArrayBuffer(value) {
      return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
    }

    /**
     * The base implementation of `_.isDate` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
     */
    function baseIsDate(value) {
      return isObjectLike(value) && baseGetTag(value) == dateTag;
    }

    /**
     * The base implementation of `_.isEqual` which supports partial comparisons
     * and tracks traversed objects.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @param {boolean} bitmask The bitmask flags.
     *  1 - Unordered comparison
     *  2 - Partial comparison
     * @param {Function} [customizer] The function to customize comparisons.
     * @param {Object} [stack] Tracks traversed `value` and `other` objects.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     */
    function baseIsEqual(value, other, bitmask, customizer, stack) {
      if (value === other) {
        return true;
      }
      if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
        return value !== value && other !== other;
      }
      return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
    }

    /**
     * A specialized version of `baseIsEqual` for arrays and objects which performs
     * deep comparisons and tracks traversed objects enabling objects with circular
     * references to be compared.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} [stack] Tracks traversed `object` and `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
      var objIsArr = isArray(object),
          othIsArr = isArray(other),
          objTag = objIsArr ? arrayTag : getTag(object),
          othTag = othIsArr ? arrayTag : getTag(other);

      objTag = objTag == argsTag ? objectTag : objTag;
      othTag = othTag == argsTag ? objectTag : othTag;

      var objIsObj = objTag == objectTag,
          othIsObj = othTag == objectTag,
          isSameTag = objTag == othTag;

      if (isSameTag && isBuffer(object)) {
        if (!isBuffer(other)) {
          return false;
        }
        objIsArr = true;
        objIsObj = false;
      }
      if (isSameTag && !objIsObj) {
        stack || (stack = new Stack);
        return (objIsArr || isTypedArray(object))
          ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
          : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
      }
      if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
        var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
            othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

        if (objIsWrapped || othIsWrapped) {
          var objUnwrapped = objIsWrapped ? object.value() : object,
              othUnwrapped = othIsWrapped ? other.value() : other;

          stack || (stack = new Stack);
          return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
        }
      }
      if (!isSameTag) {
        return false;
      }
      stack || (stack = new Stack);
      return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
    }

    /**
     * The base implementation of `_.isMap` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a map, else `false`.
     */
    function baseIsMap(value) {
      return isObjectLike(value) && getTag(value) == mapTag;
    }

    /**
     * The base implementation of `_.isMatch` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @param {Array} matchData The property names, values, and compare flags to match.
     * @param {Function} [customizer] The function to customize comparisons.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     */
    function baseIsMatch(object, source, matchData, customizer) {
      var index = matchData.length,
          length = index,
          noCustomizer = !customizer;

      if (object == null) {
        return !length;
      }
      object = Object(object);
      while (index--) {
        var data = matchData[index];
        if ((noCustomizer && data[2])
              ? data[1] !== object[data[0]]
              : !(data[0] in object)
            ) {
          return false;
        }
      }
      while (++index < length) {
        data = matchData[index];
        var key = data[0],
            objValue = object[key],
            srcValue = data[1];

        if (noCustomizer && data[2]) {
          if (objValue === undefined && !(key in object)) {
            return false;
          }
        } else {
          var stack = new Stack;
          if (customizer) {
            var result = customizer(objValue, srcValue, key, object, source, stack);
          }
          if (!(result === undefined
                ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
                : result
              )) {
            return false;
          }
        }
      }
      return true;
    }

    /**
     * The base implementation of `_.isNative` without bad shim checks.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a native function,
     *  else `false`.
     */
    function baseIsNative(value) {
      if (!isObject(value) || isMasked(value)) {
        return false;
      }
      var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
      return pattern.test(toSource(value));
    }

    /**
     * The base implementation of `_.isRegExp` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
     */
    function baseIsRegExp(value) {
      return isObjectLike(value) && baseGetTag(value) == regexpTag;
    }

    /**
     * The base implementation of `_.isSet` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a set, else `false`.
     */
    function baseIsSet(value) {
      return isObjectLike(value) && getTag(value) == setTag;
    }

    /**
     * The base implementation of `_.isTypedArray` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
     */
    function baseIsTypedArray(value) {
      return isObjectLike(value) &&
        isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
    }

    /**
     * The base implementation of `_.iteratee`.
     *
     * @private
     * @param {*} [value=_.identity] The value to convert to an iteratee.
     * @returns {Function} Returns the iteratee.
     */
    function baseIteratee(value) {
      // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
      // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
      if (typeof value == 'function') {
        return value;
      }
      if (value == null) {
        return identity;
      }
      if (typeof value == 'object') {
        return isArray(value)
          ? baseMatchesProperty(value[0], value[1])
          : baseMatches(value);
      }
      return property(value);
    }

    /**
     * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function baseKeys(object) {
      if (!isPrototype(object)) {
        return nativeKeys(object);
      }
      var result = [];
      for (var key in Object(object)) {
        if (hasOwnProperty.call(object, key) && key != 'constructor') {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function baseKeysIn(object) {
      if (!isObject(object)) {
        return nativeKeysIn(object);
      }
      var isProto = isPrototype(object),
          result = [];

      for (var key in object) {
        if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.lt` which doesn't coerce arguments.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than `other`,
     *  else `false`.
     */
    function baseLt(value, other) {
      return value < other;
    }

    /**
     * The base implementation of `_.map` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     */
    function baseMap(collection, iteratee) {
      var index = -1,
          result = isArrayLike(collection) ? Array(collection.length) : [];

      baseEach(collection, function(value, key, collection) {
        result[++index] = iteratee(value, key, collection);
      });
      return result;
    }

    /**
     * The base implementation of `_.matches` which doesn't clone `source`.
     *
     * @private
     * @param {Object} source The object of property values to match.
     * @returns {Function} Returns the new spec function.
     */
    function baseMatches(source) {
      var matchData = getMatchData(source);
      if (matchData.length == 1 && matchData[0][2]) {
        return matchesStrictComparable(matchData[0][0], matchData[0][1]);
      }
      return function(object) {
        return object === source || baseIsMatch(object, source, matchData);
      };
    }

    /**
     * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
     *
     * @private
     * @param {string} path The path of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new spec function.
     */
    function baseMatchesProperty(path, srcValue) {
      if (isKey(path) && isStrictComparable(srcValue)) {
        return matchesStrictComparable(toKey(path), srcValue);
      }
      return function(object) {
        var objValue = get(object, path);
        return (objValue === undefined && objValue === srcValue)
          ? hasIn(object, path)
          : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
      };
    }

    /**
     * The base implementation of `_.merge` without support for multiple sources.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {number} srcIndex The index of `source`.
     * @param {Function} [customizer] The function to customize merged values.
     * @param {Object} [stack] Tracks traversed source values and their merged
     *  counterparts.
     */
    function baseMerge(object, source, srcIndex, customizer, stack) {
      if (object === source) {
        return;
      }
      baseFor(source, function(srcValue, key) {
        stack || (stack = new Stack);
        if (isObject(srcValue)) {
          baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
        }
        else {
          var newValue = customizer
            ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
            : undefined;

          if (newValue === undefined) {
            newValue = srcValue;
          }
          assignMergeValue(object, key, newValue);
        }
      }, keysIn);
    }

    /**
     * A specialized version of `baseMerge` for arrays and objects which performs
     * deep merges and tracks traversed objects enabling objects with circular
     * references to be merged.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {string} key The key of the value to merge.
     * @param {number} srcIndex The index of `source`.
     * @param {Function} mergeFunc The function to merge values.
     * @param {Function} [customizer] The function to customize assigned values.
     * @param {Object} [stack] Tracks traversed source values and their merged
     *  counterparts.
     */
    function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
      var objValue = safeGet(object, key),
          srcValue = safeGet(source, key),
          stacked = stack.get(srcValue);

      if (stacked) {
        assignMergeValue(object, key, stacked);
        return;
      }
      var newValue = customizer
        ? customizer(objValue, srcValue, (key + ''), object, source, stack)
        : undefined;

      var isCommon = newValue === undefined;

      if (isCommon) {
        var isArr = isArray(srcValue),
            isBuff = !isArr && isBuffer(srcValue),
            isTyped = !isArr && !isBuff && isTypedArray(srcValue);

        newValue = srcValue;
        if (isArr || isBuff || isTyped) {
          if (isArray(objValue)) {
            newValue = objValue;
          }
          else if (isArrayLikeObject(objValue)) {
            newValue = copyArray(objValue);
          }
          else if (isBuff) {
            isCommon = false;
            newValue = cloneBuffer(srcValue, true);
          }
          else if (isTyped) {
            isCommon = false;
            newValue = cloneTypedArray(srcValue, true);
          }
          else {
            newValue = [];
          }
        }
        else if (isPlainObject(srcValue) || isArguments(srcValue)) {
          newValue = objValue;
          if (isArguments(objValue)) {
            newValue = toPlainObject(objValue);
          }
          else if (!isObject(objValue) || isFunction(objValue)) {
            newValue = initCloneObject(srcValue);
          }
        }
        else {
          isCommon = false;
        }
      }
      if (isCommon) {
        // Recursively merge objects and arrays (susceptible to call stack limits).
        stack.set(srcValue, newValue);
        mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
        stack['delete'](srcValue);
      }
      assignMergeValue(object, key, newValue);
    }

    /**
     * The base implementation of `_.nth` which doesn't coerce arguments.
     *
     * @private
     * @param {Array} array The array to query.
     * @param {number} n The index of the element to return.
     * @returns {*} Returns the nth element of `array`.
     */
    function baseNth(array, n) {
      var length = array.length;
      if (!length) {
        return;
      }
      n += n < 0 ? length : 0;
      return isIndex(n, length) ? array[n] : undefined;
    }

    /**
     * The base implementation of `_.orderBy` without param guards.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
     * @param {string[]} orders The sort orders of `iteratees`.
     * @returns {Array} Returns the new sorted array.
     */
    function baseOrderBy(collection, iteratees, orders) {
      var index = -1;
      iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));

      var result = baseMap(collection, function(value, key, collection) {
        var criteria = arrayMap(iteratees, function(iteratee) {
          return iteratee(value);
        });
        return { 'criteria': criteria, 'index': ++index, 'value': value };
      });

      return baseSortBy(result, function(object, other) {
        return compareMultiple(object, other, orders);
      });
    }

    /**
     * The base implementation of `_.pick` without support for individual
     * property identifiers.
     *
     * @private
     * @param {Object} object The source object.
     * @param {string[]} paths The property paths to pick.
     * @returns {Object} Returns the new object.
     */
    function basePick(object, paths) {
      return basePickBy(object, paths, function(value, path) {
        return hasIn(object, path);
      });
    }

    /**
     * The base implementation of  `_.pickBy` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The source object.
     * @param {string[]} paths The property paths to pick.
     * @param {Function} predicate The function invoked per property.
     * @returns {Object} Returns the new object.
     */
    function basePickBy(object, paths, predicate) {
      var index = -1,
          length = paths.length,
          result = {};

      while (++index < length) {
        var path = paths[index],
            value = baseGet(object, path);

        if (predicate(value, path)) {
          baseSet(result, castPath(path, object), value);
        }
      }
      return result;
    }

    /**
     * A specialized version of `baseProperty` which supports deep paths.
     *
     * @private
     * @param {Array|string} path The path of the property to get.
     * @returns {Function} Returns the new accessor function.
     */
    function basePropertyDeep(path) {
      return function(object) {
        return baseGet(object, path);
      };
    }

    /**
     * The base implementation of `_.pullAllBy` without support for iteratee
     * shorthands.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns `array`.
     */
    function basePullAll(array, values, iteratee, comparator) {
      var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
          index = -1,
          length = values.length,
          seen = array;

      if (array === values) {
        values = copyArray(values);
      }
      if (iteratee) {
        seen = arrayMap(array, baseUnary(iteratee));
      }
      while (++index < length) {
        var fromIndex = 0,
            value = values[index],
            computed = iteratee ? iteratee(value) : value;

        while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
          if (seen !== array) {
            splice.call(seen, fromIndex, 1);
          }
          splice.call(array, fromIndex, 1);
        }
      }
      return array;
    }

    /**
     * The base implementation of `_.pullAt` without support for individual
     * indexes or capturing the removed elements.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {number[]} indexes The indexes of elements to remove.
     * @returns {Array} Returns `array`.
     */
    function basePullAt(array, indexes) {
      var length = array ? indexes.length : 0,
          lastIndex = length - 1;

      while (length--) {
        var index = indexes[length];
        if (length == lastIndex || index !== previous) {
          var previous = index;
          if (isIndex(index)) {
            splice.call(array, index, 1);
          } else {
            baseUnset(array, index);
          }
        }
      }
      return array;
    }

    /**
     * The base implementation of `_.random` without support for returning
     * floating-point numbers.
     *
     * @private
     * @param {number} lower The lower bound.
     * @param {number} upper The upper bound.
     * @returns {number} Returns the random number.
     */
    function baseRandom(lower, upper) {
      return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
    }

    /**
     * The base implementation of `_.range` and `_.rangeRight` which doesn't
     * coerce arguments.
     *
     * @private
     * @param {number} start The start of the range.
     * @param {number} end The end of the range.
     * @param {number} step The value to increment or decrement by.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Array} Returns the range of numbers.
     */
    function baseRange(start, end, step, fromRight) {
      var index = -1,
          length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
          result = Array(length);

      while (length--) {
        result[fromRight ? length : ++index] = start;
        start += step;
      }
      return result;
    }

    /**
     * The base implementation of `_.repeat` which doesn't coerce arguments.
     *
     * @private
     * @param {string} string The string to repeat.
     * @param {number} n The number of times to repeat the string.
     * @returns {string} Returns the repeated string.
     */
    function baseRepeat(string, n) {
      var result = '';
      if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
        return result;
      }
      // Leverage the exponentiation by squaring algorithm for a faster repeat.
      // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
      do {
        if (n % 2) {
          result += string;
        }
        n = nativeFloor(n / 2);
        if (n) {
          string += string;
        }
      } while (n);

      return result;
    }

    /**
     * The base implementation of `_.rest` which doesn't validate or coerce arguments.
     *
     * @private
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @returns {Function} Returns the new function.
     */
    function baseRest(func, start) {
      return setToString(overRest(func, start, identity), func + '');
    }

    /**
     * The base implementation of `_.sample`.
     *
     * @private
     * @param {Array|Object} collection The collection to sample.
     * @returns {*} Returns the random element.
     */
    function baseSample(collection) {
      return arraySample(values(collection));
    }

    /**
     * The base implementation of `_.sampleSize` without param guards.
     *
     * @private
     * @param {Array|Object} collection The collection to sample.
     * @param {number} n The number of elements to sample.
     * @returns {Array} Returns the random elements.
     */
    function baseSampleSize(collection, n) {
      var array = values(collection);
      return shuffleSelf(array, baseClamp(n, 0, array.length));
    }

    /**
     * The base implementation of `_.set`.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @param {Function} [customizer] The function to customize path creation.
     * @returns {Object} Returns `object`.
     */
    function baseSet(object, path, value, customizer) {
      if (!isObject(object)) {
        return object;
      }
      path = castPath(path, object);

      var index = -1,
          length = path.length,
          lastIndex = length - 1,
          nested = object;

      while (nested != null && ++index < length) {
        var key = toKey(path[index]),
            newValue = value;

        if (index != lastIndex) {
          var objValue = nested[key];
          newValue = customizer ? customizer(objValue, key, nested) : undefined;
          if (newValue === undefined) {
            newValue = isObject(objValue)
              ? objValue
              : (isIndex(path[index + 1]) ? [] : {});
          }
        }
        assignValue(nested, key, newValue);
        nested = nested[key];
      }
      return object;
    }

    /**
     * The base implementation of `setData` without support for hot loop shorting.
     *
     * @private
     * @param {Function} func The function to associate metadata with.
     * @param {*} data The metadata.
     * @returns {Function} Returns `func`.
     */
    var baseSetData = !metaMap ? identity : function(func, data) {
      metaMap.set(func, data);
      return func;
    };

    /**
     * The base implementation of `setToString` without support for hot loop shorting.
     *
     * @private
     * @param {Function} func The function to modify.
     * @param {Function} string The `toString` result.
     * @returns {Function} Returns `func`.
     */
    var baseSetToString = !defineProperty ? identity : function(func, string) {
      return defineProperty(func, 'toString', {
        'configurable': true,
        'enumerable': false,
        'value': constant(string),
        'writable': true
      });
    };

    /**
     * The base implementation of `_.shuffle`.
     *
     * @private
     * @param {Array|Object} collection The collection to shuffle.
     * @returns {Array} Returns the new shuffled array.
     */
    function baseShuffle(collection) {
      return shuffleSelf(values(collection));
    }

    /**
     * The base implementation of `_.slice` without an iteratee call guard.
     *
     * @private
     * @param {Array} array The array to slice.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the slice of `array`.
     */
    function baseSlice(array, start, end) {
      var index = -1,
          length = array.length;

      if (start < 0) {
        start = -start > length ? 0 : (length + start);
      }
      end = end > length ? length : end;
      if (end < 0) {
        end += length;
      }
      length = start > end ? 0 : ((end - start) >>> 0);
      start >>>= 0;

      var result = Array(length);
      while (++index < length) {
        result[index] = array[index + start];
      }
      return result;
    }

    /**
     * The base implementation of `_.some` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     */
    function baseSome(collection, predicate) {
      var result;

      baseEach(collection, function(value, index, collection) {
        result = predicate(value, index, collection);
        return !result;
      });
      return !!result;
    }

    /**
     * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
     * performs a binary search of `array` to determine the index at which `value`
     * should be inserted into `array` in order to maintain its sort order.
     *
     * @private
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     */
    function baseSortedIndex(array, value, retHighest) {
      var low = 0,
          high = array == null ? low : array.length;

      if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
        while (low < high) {
          var mid = (low + high) >>> 1,
              computed = array[mid];

          if (computed !== null && !isSymbol(computed) &&
              (retHighest ? (computed <= value) : (computed < value))) {
            low = mid + 1;
          } else {
            high = mid;
          }
        }
        return high;
      }
      return baseSortedIndexBy(array, value, identity, retHighest);
    }

    /**
     * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
     * which invokes `iteratee` for `value` and each element of `array` to compute
     * their sort ranking. The iteratee is invoked with one argument; (value).
     *
     * @private
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} iteratee The iteratee invoked per element.
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     */
    function baseSortedIndexBy(array, value, iteratee, retHighest) {
      value = iteratee(value);

      var low = 0,
          high = array == null ? 0 : array.length,
          valIsNaN = value !== value,
          valIsNull = value === null,
          valIsSymbol = isSymbol(value),
          valIsUndefined = value === undefined;

      while (low < high) {
        var mid = nativeFloor((low + high) / 2),
            computed = iteratee(array[mid]),
            othIsDefined = computed !== undefined,
            othIsNull = computed === null,
            othIsReflexive = computed === computed,
            othIsSymbol = isSymbol(computed);

        if (valIsNaN) {
          var setLow = retHighest || othIsReflexive;
        } else if (valIsUndefined) {
          setLow = othIsReflexive && (retHighest || othIsDefined);
        } else if (valIsNull) {
          setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
        } else if (valIsSymbol) {
          setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
        } else if (othIsNull || othIsSymbol) {
          setLow = false;
        } else {
          setLow = retHighest ? (computed <= value) : (computed < value);
        }
        if (setLow) {
          low = mid + 1;
        } else {
          high = mid;
        }
      }
      return nativeMin(high, MAX_ARRAY_INDEX);
    }

    /**
     * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
     * support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     */
    function baseSortedUniq(array, iteratee) {
      var index = -1,
          length = array.length,
          resIndex = 0,
          result = [];

      while (++index < length) {
        var value = array[index],
            computed = iteratee ? iteratee(value) : value;

        if (!index || !eq(computed, seen)) {
          var seen = computed;
          result[resIndex++] = value === 0 ? 0 : value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.toNumber` which doesn't ensure correct
     * conversions of binary, hexadecimal, or octal string values.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {number} Returns the number.
     */
    function baseToNumber(value) {
      if (typeof value == 'number') {
        return value;
      }
      if (isSymbol(value)) {
        return NAN;
      }
      return +value;
    }

    /**
     * The base implementation of `_.toString` which doesn't convert nullish
     * values to empty strings.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {string} Returns the string.
     */
    function baseToString(value) {
      // Exit early for strings to avoid a performance hit in some environments.
      if (typeof value == 'string') {
        return value;
      }
      if (isArray(value)) {
        // Recursively convert values (susceptible to call stack limits).
        return arrayMap(value, baseToString) + '';
      }
      if (isSymbol(value)) {
        return symbolToString ? symbolToString.call(value) : '';
      }
      var result = (value + '');
      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
    }

    /**
     * The base implementation of `_.uniqBy` without support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     */
    function baseUniq(array, iteratee, comparator) {
      var index = -1,
          includes = arrayIncludes,
          length = array.length,
          isCommon = true,
          result = [],
          seen = result;

      if (comparator) {
        isCommon = false;
        includes = arrayIncludesWith;
      }
      else if (length >= LARGE_ARRAY_SIZE) {
        var set = iteratee ? null : createSet(array);
        if (set) {
          return setToArray(set);
        }
        isCommon = false;
        includes = cacheHas;
        seen = new SetCache;
      }
      else {
        seen = iteratee ? [] : result;
      }
      outer:
      while (++index < length) {
        var value = array[index],
            computed = iteratee ? iteratee(value) : value;

        value = (comparator || value !== 0) ? value : 0;
        if (isCommon && computed === computed) {
          var seenIndex = seen.length;
          while (seenIndex--) {
            if (seen[seenIndex] === computed) {
              continue outer;
            }
          }
          if (iteratee) {
            seen.push(computed);
          }
          result.push(value);
        }
        else if (!includes(seen, computed, comparator)) {
          if (seen !== result) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.unset`.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {Array|string} path The property path to unset.
     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
     */
    function baseUnset(object, path) {
      path = castPath(path, object);
      object = parent(object, path);
      return object == null || delete object[toKey(last(path))];
    }

    /**
     * The base implementation of `_.update`.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to update.
     * @param {Function} updater The function to produce the updated value.
     * @param {Function} [customizer] The function to customize path creation.
     * @returns {Object} Returns `object`.
     */
    function baseUpdate(object, path, updater, customizer) {
      return baseSet(object, path, updater(baseGet(object, path)), customizer);
    }

    /**
     * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
     * without support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to query.
     * @param {Function} predicate The function invoked per iteration.
     * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Array} Returns the slice of `array`.
     */
    function baseWhile(array, predicate, isDrop, fromRight) {
      var length = array.length,
          index = fromRight ? length : -1;

      while ((fromRight ? index-- : ++index < length) &&
        predicate(array[index], index, array)) {}

      return isDrop
        ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
        : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
    }

    /**
     * The base implementation of `wrapperValue` which returns the result of
     * performing a sequence of actions on the unwrapped `value`, where each
     * successive action is supplied the return value of the previous.
     *
     * @private
     * @param {*} value The unwrapped value.
     * @param {Array} actions Actions to perform to resolve the unwrapped value.
     * @returns {*} Returns the resolved value.
     */
    function baseWrapperValue(value, actions) {
      var result = value;
      if (result instanceof LazyWrapper) {
        result = result.value();
      }
      return arrayReduce(actions, function(result, action) {
        return action.func.apply(action.thisArg, arrayPush([result], action.args));
      }, result);
    }

    /**
     * The base implementation of methods like `_.xor`, without support for
     * iteratee shorthands, that accepts an array of arrays to inspect.
     *
     * @private
     * @param {Array} arrays The arrays to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of values.
     */
    function baseXor(arrays, iteratee, comparator) {
      var length = arrays.length;
      if (length < 2) {
        return length ? baseUniq(arrays[0]) : [];
      }
      var index = -1,
          result = Array(length);

      while (++index < length) {
        var array = arrays[index],
            othIndex = -1;

        while (++othIndex < length) {
          if (othIndex != index) {
            result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
          }
        }
      }
      return baseUniq(baseFlatten(result, 1), iteratee, comparator);
    }

    /**
     * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
     *
     * @private
     * @param {Array} props The property identifiers.
     * @param {Array} values The property values.
     * @param {Function} assignFunc The function to assign values.
     * @returns {Object} Returns the new object.
     */
    function baseZipObject(props, values, assignFunc) {
      var index = -1,
          length = props.length,
          valsLength = values.length,
          result = {};

      while (++index < length) {
        var value = index < valsLength ? values[index] : undefined;
        assignFunc(result, props[index], value);
      }
      return result;
    }

    /**
     * Casts `value` to an empty array if it's not an array like object.
     *
     * @private
     * @param {*} value The value to inspect.
     * @returns {Array|Object} Returns the cast array-like object.
     */
    function castArrayLikeObject(value) {
      return isArrayLikeObject(value) ? value : [];
    }

    /**
     * Casts `value` to `identity` if it's not a function.
     *
     * @private
     * @param {*} value The value to inspect.
     * @returns {Function} Returns cast function.
     */
    function castFunction(value) {
      return typeof value == 'function' ? value : identity;
    }

    /**
     * Casts `value` to a path array if it's not one.
     *
     * @private
     * @param {*} value The value to inspect.
     * @param {Object} [object] The object to query keys on.
     * @returns {Array} Returns the cast property path array.
     */
    function castPath(value, object) {
      if (isArray(value)) {
        return value;
      }
      return isKey(value, object) ? [value] : stringToPath(toString(value));
    }

    /**
     * A `baseRest` alias which can be replaced with `identity` by module
     * replacement plugins.
     *
     * @private
     * @type {Function}
     * @param {Function} func The function to apply a rest parameter to.
     * @returns {Function} Returns the new function.
     */
    var castRest = baseRest;

    /**
     * Casts `array` to a slice if it's needed.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {number} start The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the cast slice.
     */
    function castSlice(array, start, end) {
      var length = array.length;
      end = end === undefined ? length : end;
      return (!start && end >= length) ? array : baseSlice(array, start, end);
    }

    /**
     * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
     *
     * @private
     * @param {number|Object} id The timer id or timeout object of the timer to clear.
     */
    var clearTimeout = ctxClearTimeout || function(id) {
      return root.clearTimeout(id);
    };

    /**
     * Creates a clone of  `buffer`.
     *
     * @private
     * @param {Buffer} buffer The buffer to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Buffer} Returns the cloned buffer.
     */
    function cloneBuffer(buffer, isDeep) {
      if (isDeep) {
        return buffer.slice();
      }
      var length = buffer.length,
          result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

      buffer.copy(result);
      return result;
    }

    /**
     * Creates a clone of `arrayBuffer`.
     *
     * @private
     * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
     * @returns {ArrayBuffer} Returns the cloned array buffer.
     */
    function cloneArrayBuffer(arrayBuffer) {
      var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
      new Uint8Array(result).set(new Uint8Array(arrayBuffer));
      return result;
    }

    /**
     * Creates a clone of `dataView`.
     *
     * @private
     * @param {Object} dataView The data view to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the cloned data view.
     */
    function cloneDataView(dataView, isDeep) {
      var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
      return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
    }

    /**
     * Creates a clone of `regexp`.
     *
     * @private
     * @param {Object} regexp The regexp to clone.
     * @returns {Object} Returns the cloned regexp.
     */
    function cloneRegExp(regexp) {
      var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
      result.lastIndex = regexp.lastIndex;
      return result;
    }

    /**
     * Creates a clone of the `symbol` object.
     *
     * @private
     * @param {Object} symbol The symbol object to clone.
     * @returns {Object} Returns the cloned symbol object.
     */
    function cloneSymbol(symbol) {
      return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
    }

    /**
     * Creates a clone of `typedArray`.
     *
     * @private
     * @param {Object} typedArray The typed array to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the cloned typed array.
     */
    function cloneTypedArray(typedArray, isDeep) {
      var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
      return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
    }

    /**
     * Compares values to sort them in ascending order.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {number} Returns the sort order indicator for `value`.
     */
    function compareAscending(value, other) {
      if (value !== other) {
        var valIsDefined = value !== undefined,
            valIsNull = value === null,
            valIsReflexive = value === value,
            valIsSymbol = isSymbol(value);

        var othIsDefined = other !== undefined,
            othIsNull = other === null,
            othIsReflexive = other === other,
            othIsSymbol = isSymbol(other);

        if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
            (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
            (valIsNull && othIsDefined && othIsReflexive) ||
            (!valIsDefined && othIsReflexive) ||
            !valIsReflexive) {
          return 1;
        }
        if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
            (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
            (othIsNull && valIsDefined && valIsReflexive) ||
            (!othIsDefined && valIsReflexive) ||
            !othIsReflexive) {
          return -1;
        }
      }
      return 0;
    }

    /**
     * Used by `_.orderBy` to compare multiple properties of a value to another
     * and stable sort them.
     *
     * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
     * specify an order of "desc" for descending or "asc" for ascending sort order
     * of corresponding values.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {boolean[]|string[]} orders The order to sort by for each property.
     * @returns {number} Returns the sort order indicator for `object`.
     */
    function compareMultiple(object, other, orders) {
      var index = -1,
          objCriteria = object.criteria,
          othCriteria = other.criteria,
          length = objCriteria.length,
          ordersLength = orders.length;

      while (++index < length) {
        var result = compareAscending(objCriteria[index], othCriteria[index]);
        if (result) {
          if (index >= ordersLength) {
            return result;
          }
          var order = orders[index];
          return result * (order == 'desc' ? -1 : 1);
        }
      }
      // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
      // that causes it, under certain circumstances, to provide the same value for
      // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
      // for more details.
      //
      // This also ensures a stable sort in V8 and other engines.
      // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
      return object.index - other.index;
    }

    /**
     * Creates an array that is the composition of partially applied arguments,
     * placeholders, and provided arguments into a single array of arguments.
     *
     * @private
     * @param {Array} args The provided arguments.
     * @param {Array} partials The arguments to prepend to those provided.
     * @param {Array} holders The `partials` placeholder indexes.
     * @params {boolean} [isCurried] Specify composing for a curried function.
     * @returns {Array} Returns the new array of composed arguments.
     */
    function composeArgs(args, partials, holders, isCurried) {
      var argsIndex = -1,
          argsLength = args.length,
          holdersLength = holders.length,
          leftIndex = -1,
          leftLength = partials.length,
          rangeLength = nativeMax(argsLength - holdersLength, 0),
          result = Array(leftLength + rangeLength),
          isUncurried = !isCurried;

      while (++leftIndex < leftLength) {
        result[leftIndex] = partials[leftIndex];
      }
      while (++argsIndex < holdersLength) {
        if (isUncurried || argsIndex < argsLength) {
          result[holders[argsIndex]] = args[argsIndex];
        }
      }
      while (rangeLength--) {
        result[leftIndex++] = args[argsIndex++];
      }
      return result;
    }

    /**
     * This function is like `composeArgs` except that the arguments composition
     * is tailored for `_.partialRight`.
     *
     * @private
     * @param {Array} args The provided arguments.
     * @param {Array} partials The arguments to append to those provided.
     * @param {Array} holders The `partials` placeholder indexes.
     * @params {boolean} [isCurried] Specify composing for a curried function.
     * @returns {Array} Returns the new array of composed arguments.
     */
    function composeArgsRight(args, partials, holders, isCurried) {
      var argsIndex = -1,
          argsLength = args.length,
          holdersIndex = -1,
          holdersLength = holders.length,
          rightIndex = -1,
          rightLength = partials.length,
          rangeLength = nativeMax(argsLength - holdersLength, 0),
          result = Array(rangeLength + rightLength),
          isUncurried = !isCurried;

      while (++argsIndex < rangeLength) {
        result[argsIndex] = args[argsIndex];
      }
      var offset = argsIndex;
      while (++rightIndex < rightLength) {
        result[offset + rightIndex] = partials[rightIndex];
      }
      while (++holdersIndex < holdersLength) {
        if (isUncurried || argsIndex < argsLength) {
          result[offset + holders[holdersIndex]] = args[argsIndex++];
        }
      }
      return result;
    }

    /**
     * Copies the values of `source` to `array`.
     *
     * @private
     * @param {Array} source The array to copy values from.
     * @param {Array} [array=[]] The array to copy values to.
     * @returns {Array} Returns `array`.
     */
    function copyArray(source, array) {
      var index = -1,
          length = source.length;

      array || (array = Array(length));
      while (++index < length) {
        array[index] = source[index];
      }
      return array;
    }

    /**
     * Copies properties of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy properties from.
     * @param {Array} props The property identifiers to copy.
     * @param {Object} [object={}] The object to copy properties to.
     * @param {Function} [customizer] The function to customize copied values.
     * @returns {Object} Returns `object`.
     */
    function copyObject(source, props, object, customizer) {
      var isNew = !object;
      object || (object = {});

      var index = -1,
          length = props.length;

      while (++index < length) {
        var key = props[index];

        var newValue = customizer
          ? customizer(object[key], source[key], key, object, source)
          : undefined;

        if (newValue === undefined) {
          newValue = source[key];
        }
        if (isNew) {
          baseAssignValue(object, key, newValue);
        } else {
          assignValue(object, key, newValue);
        }
      }
      return object;
    }

    /**
     * Copies own symbols of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy symbols from.
     * @param {Object} [object={}] The object to copy symbols to.
     * @returns {Object} Returns `object`.
     */
    function copySymbols(source, object) {
      return copyObject(source, getSymbols(source), object);
    }

    /**
     * Copies own and inherited symbols of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy symbols from.
     * @param {Object} [object={}] The object to copy symbols to.
     * @returns {Object} Returns `object`.
     */
    function copySymbolsIn(source, object) {
      return copyObject(source, getSymbolsIn(source), object);
    }

    /**
     * Creates a function like `_.groupBy`.
     *
     * @private
     * @param {Function} setter The function to set accumulator values.
     * @param {Function} [initializer] The accumulator object initializer.
     * @returns {Function} Returns the new aggregator function.
     */
    function createAggregator(setter, initializer) {
      return function(collection, iteratee) {
        var func = isArray(collection) ? arrayAggregator : baseAggregator,
            accumulator = initializer ? initializer() : {};

        return func(collection, setter, getIteratee(iteratee, 2), accumulator);
      };
    }

    /**
     * Creates a function like `_.assign`.
     *
     * @private
     * @param {Function} assigner The function to assign values.
     * @returns {Function} Returns the new assigner function.
     */
    function createAssigner(assigner) {
      return baseRest(function(object, sources) {
        var index = -1,
            length = sources.length,
            customizer = length > 1 ? sources[length - 1] : undefined,
            guard = length > 2 ? sources[2] : undefined;

        customizer = (assigner.length > 3 && typeof customizer == 'function')
          ? (length--, customizer)
          : undefined;

        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
          customizer = length < 3 ? undefined : customizer;
          length = 1;
        }
        object = Object(object);
        while (++index < length) {
          var source = sources[index];
          if (source) {
            assigner(object, source, index, customizer);
          }
        }
        return object;
      });
    }

    /**
     * Creates a `baseEach` or `baseEachRight` function.
     *
     * @private
     * @param {Function} eachFunc The function to iterate over a collection.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new base function.
     */
    function createBaseEach(eachFunc, fromRight) {
      return function(collection, iteratee) {
        if (collection == null) {
          return collection;
        }
        if (!isArrayLike(collection)) {
          return eachFunc(collection, iteratee);
        }
        var length = collection.length,
            index = fromRight ? length : -1,
            iterable = Object(collection);

        while ((fromRight ? index-- : ++index < length)) {
          if (iteratee(iterable[index], index, iterable) === false) {
            break;
          }
        }
        return collection;
      };
    }

    /**
     * Creates a base function for methods like `_.forIn` and `_.forOwn`.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new base function.
     */
    function createBaseFor(fromRight) {
      return function(object, iteratee, keysFunc) {
        var index = -1,
            iterable = Object(object),
            props = keysFunc(object),
            length = props.length;

        while (length--) {
          var key = props[fromRight ? length : ++index];
          if (iteratee(iterable[key], key, iterable) === false) {
            break;
          }
        }
        return object;
      };
    }

    /**
     * Creates a function that wraps `func` to invoke it with the optional `this`
     * binding of `thisArg`.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createBind(func, bitmask, thisArg) {
      var isBind = bitmask & WRAP_BIND_FLAG,
          Ctor = createCtor(func);

      function wrapper() {
        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
        return fn.apply(isBind ? thisArg : this, arguments);
      }
      return wrapper;
    }

    /**
     * Creates a function like `_.lowerFirst`.
     *
     * @private
     * @param {string} methodName The name of the `String` case method to use.
     * @returns {Function} Returns the new case function.
     */
    function createCaseFirst(methodName) {
      return function(string) {
        string = toString(string);

        var strSymbols = hasUnicode(string)
          ? stringToArray(string)
          : undefined;

        var chr = strSymbols
          ? strSymbols[0]
          : string.charAt(0);

        var trailing = strSymbols
          ? castSlice(strSymbols, 1).join('')
          : string.slice(1);

        return chr[methodName]() + trailing;
      };
    }

    /**
     * Creates a function like `_.camelCase`.
     *
     * @private
     * @param {Function} callback The function to combine each word.
     * @returns {Function} Returns the new compounder function.
     */
    function createCompounder(callback) {
      return function(string) {
        return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
      };
    }

    /**
     * Creates a function that produces an instance of `Ctor` regardless of
     * whether it was invoked as part of a `new` expression or by `call` or `apply`.
     *
     * @private
     * @param {Function} Ctor The constructor to wrap.
     * @returns {Function} Returns the new wrapped function.
     */
    function createCtor(Ctor) {
      return function() {
        // Use a `switch` statement to work with class constructors. See
        // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
        // for more details.
        var args = arguments;
        switch (args.length) {
          case 0: return new Ctor;
          case 1: return new Ctor(args[0]);
          case 2: return new Ctor(args[0], args[1]);
          case 3: return new Ctor(args[0], args[1], args[2]);
          case 4: return new Ctor(args[0], args[1], args[2], args[3]);
          case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
          case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
          case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
        }
        var thisBinding = baseCreate(Ctor.prototype),
            result = Ctor.apply(thisBinding, args);

        // Mimic the constructor's `return` behavior.
        // See https://es5.github.io/#x13.2.2 for more details.
        return isObject(result) ? result : thisBinding;
      };
    }

    /**
     * Creates a function that wraps `func` to enable currying.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {number} arity The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createCurry(func, bitmask, arity) {
      var Ctor = createCtor(func);

      function wrapper() {
        var length = arguments.length,
            args = Array(length),
            index = length,
            placeholder = getHolder(wrapper);

        while (index--) {
          args[index] = arguments[index];
        }
        var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
          ? []
          : replaceHolders(args, placeholder);

        length -= holders.length;
        if (length < arity) {
          return createRecurry(
            func, bitmask, createHybrid, wrapper.placeholder, undefined,
            args, holders, undefined, undefined, arity - length);
        }
        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
        return apply(fn, this, args);
      }
      return wrapper;
    }

    /**
     * Creates a `_.find` or `_.findLast` function.
     *
     * @private
     * @param {Function} findIndexFunc The function to find the collection index.
     * @returns {Function} Returns the new find function.
     */
    function createFind(findIndexFunc) {
      return function(collection, predicate, fromIndex) {
        var iterable = Object(collection);
        if (!isArrayLike(collection)) {
          var iteratee = getIteratee(predicate, 3);
          collection = keys(collection);
          predicate = function(key) { return iteratee(iterable[key], key, iterable); };
        }
        var index = findIndexFunc(collection, predicate, fromIndex);
        return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
      };
    }

    /**
     * Creates a `_.flow` or `_.flowRight` function.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new flow function.
     */
    function createFlow(fromRight) {
      return flatRest(function(funcs) {
        var length = funcs.length,
            index = length,
            prereq = LodashWrapper.prototype.thru;

        if (fromRight) {
          funcs.reverse();
        }
        while (index--) {
          var func = funcs[index];
          if (typeof func != 'function') {
            throw new TypeError(FUNC_ERROR_TEXT);
          }
          if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
            var wrapper = new LodashWrapper([], true);
          }
        }
        index = wrapper ? index : length;
        while (++index < length) {
          func = funcs[index];

          var funcName = getFuncName(func),
              data = funcName == 'wrapper' ? getData(func) : undefined;

          if (data && isLaziable(data[0]) &&
                data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
                !data[4].length && data[9] == 1
              ) {
            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
          } else {
            wrapper = (func.length == 1 && isLaziable(func))
              ? wrapper[funcName]()
              : wrapper.thru(func);
          }
        }
        return function() {
          var args = arguments,
              value = args[0];

          if (wrapper && args.length == 1 && isArray(value)) {
            return wrapper.plant(value).value();
          }
          var index = 0,
              result = length ? funcs[index].apply(this, args) : value;

          while (++index < length) {
            result = funcs[index].call(this, result);
          }
          return result;
        };
      });
    }

    /**
     * Creates a function that wraps `func` to invoke it with optional `this`
     * binding of `thisArg`, partial application, and currying.
     *
     * @private
     * @param {Function|string} func The function or method name to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to prepend to those provided to
     *  the new function.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [partialsRight] The arguments to append to those provided
     *  to the new function.
     * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
      var isAry = bitmask & WRAP_ARY_FLAG,
          isBind = bitmask & WRAP_BIND_FLAG,
          isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
          isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
          isFlip = bitmask & WRAP_FLIP_FLAG,
          Ctor = isBindKey ? undefined : createCtor(func);

      function wrapper() {
        var length = arguments.length,
            args = Array(length),
            index = length;

        while (index--) {
          args[index] = arguments[index];
        }
        if (isCurried) {
          var placeholder = getHolder(wrapper),
              holdersCount = countHolders(args, placeholder);
        }
        if (partials) {
          args = composeArgs(args, partials, holders, isCurried);
        }
        if (partialsRight) {
          args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
        }
        length -= holdersCount;
        if (isCurried && length < arity) {
          var newHolders = replaceHolders(args, placeholder);
          return createRecurry(
            func, bitmask, createHybrid, wrapper.placeholder, thisArg,
            args, newHolders, argPos, ary, arity - length
          );
        }
        var thisBinding = isBind ? thisArg : this,
            fn = isBindKey ? thisBinding[func] : func;

        length = args.length;
        if (argPos) {
          args = reorder(args, argPos);
        } else if (isFlip && length > 1) {
          args.reverse();
        }
        if (isAry && ary < length) {
          args.length = ary;
        }
        if (this && this !== root && this instanceof wrapper) {
          fn = Ctor || createCtor(fn);
        }
        return fn.apply(thisBinding, args);
      }
      return wrapper;
    }

    /**
     * Creates a function like `_.invertBy`.
     *
     * @private
     * @param {Function} setter The function to set accumulator values.
     * @param {Function} toIteratee The function to resolve iteratees.
     * @returns {Function} Returns the new inverter function.
     */
    function createInverter(setter, toIteratee) {
      return function(object, iteratee) {
        return baseInverter(object, setter, toIteratee(iteratee), {});
      };
    }

    /**
     * Creates a function that performs a mathematical operation on two values.
     *
     * @private
     * @param {Function} operator The function to perform the operation.
     * @param {number} [defaultValue] The value used for `undefined` arguments.
     * @returns {Function} Returns the new mathematical operation function.
     */
    function createMathOperation(operator, defaultValue) {
      return function(value, other) {
        var result;
        if (value === undefined && other === undefined) {
          return defaultValue;
        }
        if (value !== undefined) {
          result = value;
        }
        if (other !== undefined) {
          if (result === undefined) {
            return other;
          }
          if (typeof value == 'string' || typeof other == 'string') {
            value = baseToString(value);
            other = baseToString(other);
          } else {
            value = baseToNumber(value);
            other = baseToNumber(other);
          }
          result = operator(value, other);
        }
        return result;
      };
    }

    /**
     * Creates a function like `_.over`.
     *
     * @private
     * @param {Function} arrayFunc The function to iterate over iteratees.
     * @returns {Function} Returns the new over function.
     */
    function createOver(arrayFunc) {
      return flatRest(function(iteratees) {
        iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
        return baseRest(function(args) {
          var thisArg = this;
          return arrayFunc(iteratees, function(iteratee) {
            return apply(iteratee, thisArg, args);
          });
        });
      });
    }

    /**
     * Creates the padding for `string` based on `length`. The `chars` string
     * is truncated if the number of characters exceeds `length`.
     *
     * @private
     * @param {number} length The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padding for `string`.
     */
    function createPadding(length, chars) {
      chars = chars === undefined ? ' ' : baseToString(chars);

      var charsLength = chars.length;
      if (charsLength < 2) {
        return charsLength ? baseRepeat(chars, length) : chars;
      }
      var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
      return hasUnicode(chars)
        ? castSlice(stringToArray(result), 0, length).join('')
        : result.slice(0, length);
    }

    /**
     * Creates a function that wraps `func` to invoke it with the `this` binding
     * of `thisArg` and `partials` prepended to the arguments it receives.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {Array} partials The arguments to prepend to those provided to
     *  the new function.
     * @returns {Function} Returns the new wrapped function.
     */
    function createPartial(func, bitmask, thisArg, partials) {
      var isBind = bitmask & WRAP_BIND_FLAG,
          Ctor = createCtor(func);

      function wrapper() {
        var argsIndex = -1,
            argsLength = arguments.length,
            leftIndex = -1,
            leftLength = partials.length,
            args = Array(leftLength + argsLength),
            fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;

        while (++leftIndex < leftLength) {
          args[leftIndex] = partials[leftIndex];
        }
        while (argsLength--) {
          args[leftIndex++] = arguments[++argsIndex];
        }
        return apply(fn, isBind ? thisArg : this, args);
      }
      return wrapper;
    }

    /**
     * Creates a `_.range` or `_.rangeRight` function.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new range function.
     */
    function createRange(fromRight) {
      return function(start, end, step) {
        if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
          end = step = undefined;
        }
        // Ensure the sign of `-0` is preserved.
        start = toFinite(start);
        if (end === undefined) {
          end = start;
          start = 0;
        } else {
          end = toFinite(end);
        }
        step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
        return baseRange(start, end, step, fromRight);
      };
    }

    /**
     * Creates a function that performs a relational operation on two values.
     *
     * @private
     * @param {Function} operator The function to perform the operation.
     * @returns {Function} Returns the new relational operation function.
     */
    function createRelationalOperation(operator) {
      return function(value, other) {
        if (!(typeof value == 'string' && typeof other == 'string')) {
          value = toNumber(value);
          other = toNumber(other);
        }
        return operator(value, other);
      };
    }

    /**
     * Creates a function that wraps `func` to continue currying.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {Function} wrapFunc The function to create the `func` wrapper.
     * @param {*} placeholder The placeholder value.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to prepend to those provided to
     *  the new function.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
      var isCurry = bitmask & WRAP_CURRY_FLAG,
          newHolders = isCurry ? holders : undefined,
          newHoldersRight = isCurry ? undefined : holders,
          newPartials = isCurry ? partials : undefined,
          newPartialsRight = isCurry ? undefined : partials;

      bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
      bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);

      if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
        bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
      }
      var newData = [
        func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
        newHoldersRight, argPos, ary, arity
      ];

      var result = wrapFunc.apply(undefined, newData);
      if (isLaziable(func)) {
        setData(result, newData);
      }
      result.placeholder = placeholder;
      return setWrapToString(result, func, bitmask);
    }

    /**
     * Creates a function like `_.round`.
     *
     * @private
     * @param {string} methodName The name of the `Math` method to use when rounding.
     * @returns {Function} Returns the new round function.
     */
    function createRound(methodName) {
      var func = Math[methodName];
      return function(number, precision) {
        number = toNumber(number);
        precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
        if (precision && nativeIsFinite(number)) {
          // Shift with exponential notation to avoid floating-point issues.
          // See [MDN](https://mdn.io/round#Examples) for more details.
          var pair = (toString(number) + 'e').split('e'),
              value = func(pair[0] + 'e' + (+pair[1] + precision));

          pair = (toString(value) + 'e').split('e');
          return +(pair[0] + 'e' + (+pair[1] - precision));
        }
        return func(number);
      };
    }

    /**
     * Creates a set object of `values`.
     *
     * @private
     * @param {Array} values The values to add to the set.
     * @returns {Object} Returns the new set.
     */
    var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
      return new Set(values);
    };

    /**
     * Creates a `_.toPairs` or `_.toPairsIn` function.
     *
     * @private
     * @param {Function} keysFunc The function to get the keys of a given object.
     * @returns {Function} Returns the new pairs function.
     */
    function createToPairs(keysFunc) {
      return function(object) {
        var tag = getTag(object);
        if (tag == mapTag) {
          return mapToArray(object);
        }
        if (tag == setTag) {
          return setToPairs(object);
        }
        return baseToPairs(object, keysFunc(object));
      };
    }

    /**
     * Creates a function that either curries or invokes `func` with optional
     * `this` binding and partially applied arguments.
     *
     * @private
     * @param {Function|string} func The function or method name to wrap.
     * @param {number} bitmask The bitmask flags.
     *    1 - `_.bind`
     *    2 - `_.bindKey`
     *    4 - `_.curry` or `_.curryRight` of a bound function
     *    8 - `_.curry`
     *   16 - `_.curryRight`
     *   32 - `_.partial`
     *   64 - `_.partialRight`
     *  128 - `_.rearg`
     *  256 - `_.ary`
     *  512 - `_.flip`
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to be partially applied.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
      var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
      if (!isBindKey && typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var length = partials ? partials.length : 0;
      if (!length) {
        bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
        partials = holders = undefined;
      }
      ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
      arity = arity === undefined ? arity : toInteger(arity);
      length -= holders ? holders.length : 0;

      if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
        var partialsRight = partials,
            holdersRight = holders;

        partials = holders = undefined;
      }
      var data = isBindKey ? undefined : getData(func);

      var newData = [
        func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
        argPos, ary, arity
      ];

      if (data) {
        mergeData(newData, data);
      }
      func = newData[0];
      bitmask = newData[1];
      thisArg = newData[2];
      partials = newData[3];
      holders = newData[4];
      arity = newData[9] = newData[9] === undefined
        ? (isBindKey ? 0 : func.length)
        : nativeMax(newData[9] - length, 0);

      if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
        bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
      }
      if (!bitmask || bitmask == WRAP_BIND_FLAG) {
        var result = createBind(func, bitmask, thisArg);
      } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
        result = createCurry(func, bitmask, arity);
      } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
        result = createPartial(func, bitmask, thisArg, partials);
      } else {
        result = createHybrid.apply(undefined, newData);
      }
      var setter = data ? baseSetData : setData;
      return setWrapToString(setter(result, newData), func, bitmask);
    }

    /**
     * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
     * of source objects to the destination object for all destination properties
     * that resolve to `undefined`.
     *
     * @private
     * @param {*} objValue The destination value.
     * @param {*} srcValue The source value.
     * @param {string} key The key of the property to assign.
     * @param {Object} object The parent object of `objValue`.
     * @returns {*} Returns the value to assign.
     */
    function customDefaultsAssignIn(objValue, srcValue, key, object) {
      if (objValue === undefined ||
          (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
        return srcValue;
      }
      return objValue;
    }

    /**
     * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
     * objects into destination objects that are passed thru.
     *
     * @private
     * @param {*} objValue The destination value.
     * @param {*} srcValue The source value.
     * @param {string} key The key of the property to merge.
     * @param {Object} object The parent object of `objValue`.
     * @param {Object} source The parent object of `srcValue`.
     * @param {Object} [stack] Tracks traversed source values and their merged
     *  counterparts.
     * @returns {*} Returns the value to assign.
     */
    function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
      if (isObject(objValue) && isObject(srcValue)) {
        // Recursively merge objects and arrays (susceptible to call stack limits).
        stack.set(srcValue, objValue);
        baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
        stack['delete'](srcValue);
      }
      return objValue;
    }

    /**
     * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
     * objects.
     *
     * @private
     * @param {*} value The value to inspect.
     * @param {string} key The key of the property to inspect.
     * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
     */
    function customOmitClone(value) {
      return isPlainObject(value) ? undefined : value;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for arrays with support for
     * partial deep comparisons.
     *
     * @private
     * @param {Array} array The array to compare.
     * @param {Array} other The other array to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} stack Tracks traversed `array` and `other` objects.
     * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
     */
    function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
          arrLength = array.length,
          othLength = other.length;

      if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
        return false;
      }
      // Assume cyclic values are equal.
      var stacked = stack.get(array);
      if (stacked && stack.get(other)) {
        return stacked == other;
      }
      var index = -1,
          result = true,
          seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;

      stack.set(array, other);
      stack.set(other, array);

      // Ignore non-index properties.
      while (++index < arrLength) {
        var arrValue = array[index],
            othValue = other[index];

        if (customizer) {
          var compared = isPartial
            ? customizer(othValue, arrValue, index, other, array, stack)
            : customizer(arrValue, othValue, index, array, other, stack);
        }
        if (compared !== undefined) {
          if (compared) {
            continue;
          }
          result = false;
          break;
        }
        // Recursively compare arrays (susceptible to call stack limits).
        if (seen) {
          if (!arraySome(other, function(othValue, othIndex) {
                if (!cacheHas(seen, othIndex) &&
                    (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
                  return seen.push(othIndex);
                }
              })) {
            result = false;
            break;
          }
        } else if (!(
              arrValue === othValue ||
                equalFunc(arrValue, othValue, bitmask, customizer, stack)
            )) {
          result = false;
          break;
        }
      }
      stack['delete'](array);
      stack['delete'](other);
      return result;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for comparing objects of
     * the same `toStringTag`.
     *
     * **Note:** This function only supports comparing values with tags of
     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {string} tag The `toStringTag` of the objects to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} stack Tracks traversed `object` and `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
      switch (tag) {
        case dataViewTag:
          if ((object.byteLength != other.byteLength) ||
              (object.byteOffset != other.byteOffset)) {
            return false;
          }
          object = object.buffer;
          other = other.buffer;

        case arrayBufferTag:
          if ((object.byteLength != other.byteLength) ||
              !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
            return false;
          }
          return true;

        case boolTag:
        case dateTag:
        case numberTag:
          // Coerce booleans to `1` or `0` and dates to milliseconds.
          // Invalid dates are coerced to `NaN`.
          return eq(+object, +other);

        case errorTag:
          return object.name == other.name && object.message == other.message;

        case regexpTag:
        case stringTag:
          // Coerce regexes to strings and treat strings, primitives and objects,
          // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
          // for more details.
          return object == (other + '');

        case mapTag:
          var convert = mapToArray;

        case setTag:
          var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
          convert || (convert = setToArray);

          if (object.size != other.size && !isPartial) {
            return false;
          }
          // Assume cyclic values are equal.
          var stacked = stack.get(object);
          if (stacked) {
            return stacked == other;
          }
          bitmask |= COMPARE_UNORDERED_FLAG;

          // Recursively compare objects (susceptible to call stack limits).
          stack.set(object, other);
          var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
          stack['delete'](object);
          return result;

        case symbolTag:
          if (symbolValueOf) {
            return symbolValueOf.call(object) == symbolValueOf.call(other);
          }
      }
      return false;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for objects with support for
     * partial deep comparisons.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} stack Tracks traversed `object` and `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
          objProps = getAllKeys(object),
          objLength = objProps.length,
          othProps = getAllKeys(other),
          othLength = othProps.length;

      if (objLength != othLength && !isPartial) {
        return false;
      }
      var index = objLength;
      while (index--) {
        var key = objProps[index];
        if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
          return false;
        }
      }
      // Assume cyclic values are equal.
      var stacked = stack.get(object);
      if (stacked && stack.get(other)) {
        return stacked == other;
      }
      var result = true;
      stack.set(object, other);
      stack.set(other, object);

      var skipCtor = isPartial;
      while (++index < objLength) {
        key = objProps[index];
        var objValue = object[key],
            othValue = other[key];

        if (customizer) {
          var compared = isPartial
            ? customizer(othValue, objValue, key, other, object, stack)
            : customizer(objValue, othValue, key, object, other, stack);
        }
        // Recursively compare objects (susceptible to call stack limits).
        if (!(compared === undefined
              ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
              : compared
            )) {
          result = false;
          break;
        }
        skipCtor || (skipCtor = key == 'constructor');
      }
      if (result && !skipCtor) {
        var objCtor = object.constructor,
            othCtor = other.constructor;

        // Non `Object` object instances with different constructors are not equal.
        if (objCtor != othCtor &&
            ('constructor' in object && 'constructor' in other) &&
            !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
              typeof othCtor == 'function' && othCtor instanceof othCtor)) {
          result = false;
        }
      }
      stack['delete'](object);
      stack['delete'](other);
      return result;
    }

    /**
     * A specialized version of `baseRest` which flattens the rest array.
     *
     * @private
     * @param {Function} func The function to apply a rest parameter to.
     * @returns {Function} Returns the new function.
     */
    function flatRest(func) {
      return setToString(overRest(func, undefined, flatten), func + '');
    }

    /**
     * Creates an array of own enumerable property names and symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names and symbols.
     */
    function getAllKeys(object) {
      return baseGetAllKeys(object, keys, getSymbols);
    }

    /**
     * Creates an array of own and inherited enumerable property names and
     * symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names and symbols.
     */
    function getAllKeysIn(object) {
      return baseGetAllKeys(object, keysIn, getSymbolsIn);
    }

    /**
     * Gets metadata for `func`.
     *
     * @private
     * @param {Function} func The function to query.
     * @returns {*} Returns the metadata for `func`.
     */
    var getData = !metaMap ? noop : function(func) {
      return metaMap.get(func);
    };

    /**
     * Gets the name of `func`.
     *
     * @private
     * @param {Function} func The function to query.
     * @returns {string} Returns the function name.
     */
    function getFuncName(func) {
      var result = (func.name + ''),
          array = realNames[result],
          length = hasOwnProperty.call(realNames, result) ? array.length : 0;

      while (length--) {
        var data = array[length],
            otherFunc = data.func;
        if (otherFunc == null || otherFunc == func) {
          return data.name;
        }
      }
      return result;
    }

    /**
     * Gets the argument placeholder value for `func`.
     *
     * @private
     * @param {Function} func The function to inspect.
     * @returns {*} Returns the placeholder value.
     */
    function getHolder(func) {
      var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
      return object.placeholder;
    }

    /**
     * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
     * this function returns the custom method, otherwise it returns `baseIteratee`.
     * If arguments are provided, the chosen function is invoked with them and
     * its result is returned.
     *
     * @private
     * @param {*} [value] The value to convert to an iteratee.
     * @param {number} [arity] The arity of the created iteratee.
     * @returns {Function} Returns the chosen function or its result.
     */
    function getIteratee() {
      var result = lodash.iteratee || iteratee;
      result = result === iteratee ? baseIteratee : result;
      return arguments.length ? result(arguments[0], arguments[1]) : result;
    }

    /**
     * Gets the data for `map`.
     *
     * @private
     * @param {Object} map The map to query.
     * @param {string} key The reference key.
     * @returns {*} Returns the map data.
     */
    function getMapData(map, key) {
      var data = map.__data__;
      return isKeyable(key)
        ? data[typeof key == 'string' ? 'string' : 'hash']
        : data.map;
    }

    /**
     * Gets the property names, values, and compare flags of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the match data of `object`.
     */
    function getMatchData(object) {
      var result = keys(object),
          length = result.length;

      while (length--) {
        var key = result[length],
            value = object[key];

        result[length] = [key, value, isStrictComparable(value)];
      }
      return result;
    }

    /**
     * Gets the native function at `key` of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {string} key The key of the method to get.
     * @returns {*} Returns the function if it's native, else `undefined`.
     */
    function getNative(object, key) {
      var value = getValue(object, key);
      return baseIsNative(value) ? value : undefined;
    }

    /**
     * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
     *
     * @private
     * @param {*} value The value to query.
     * @returns {string} Returns the raw `toStringTag`.
     */
    function getRawTag(value) {
      var isOwn = hasOwnProperty.call(value, symToStringTag),
          tag = value[symToStringTag];

      try {
        value[symToStringTag] = undefined;
        var unmasked = true;
      } catch (e) {}

      var result = nativeObjectToString.call(value);
      if (unmasked) {
        if (isOwn) {
          value[symToStringTag] = tag;
        } else {
          delete value[symToStringTag];
        }
      }
      return result;
    }

    /**
     * Creates an array of the own enumerable symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of symbols.
     */
    var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
      if (object == null) {
        return [];
      }
      object = Object(object);
      return arrayFilter(nativeGetSymbols(object), function(symbol) {
        return propertyIsEnumerable.call(object, symbol);
      });
    };

    /**
     * Creates an array of the own and inherited enumerable symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of symbols.
     */
    var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
      var result = [];
      while (object) {
        arrayPush(result, getSymbols(object));
        object = getPrototype(object);
      }
      return result;
    };

    /**
     * Gets the `toStringTag` of `value`.
     *
     * @private
     * @param {*} value The value to query.
     * @returns {string} Returns the `toStringTag`.
     */
    var getTag = baseGetTag;

    // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
    if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
        (Map && getTag(new Map) != mapTag) ||
        (Promise && getTag(Promise.resolve()) != promiseTag) ||
        (Set && getTag(new Set) != setTag) ||
        (WeakMap && getTag(new WeakMap) != weakMapTag)) {
      getTag = function(value) {
        var result = baseGetTag(value),
            Ctor = result == objectTag ? value.constructor : undefined,
            ctorString = Ctor ? toSource(Ctor) : '';

        if (ctorString) {
          switch (ctorString) {
            case dataViewCtorString: return dataViewTag;
            case mapCtorString: return mapTag;
            case promiseCtorString: return promiseTag;
            case setCtorString: return setTag;
            case weakMapCtorString: return weakMapTag;
          }
        }
        return result;
      };
    }

    /**
     * Gets the view, applying any `transforms` to the `start` and `end` positions.
     *
     * @private
     * @param {number} start The start of the view.
     * @param {number} end The end of the view.
     * @param {Array} transforms The transformations to apply to the view.
     * @returns {Object} Returns an object containing the `start` and `end`
     *  positions of the view.
     */
    function getView(start, end, transforms) {
      var index = -1,
          length = transforms.length;

      while (++index < length) {
        var data = transforms[index],
            size = data.size;

        switch (data.type) {
          case 'drop':      start += size; break;
          case 'dropRight': end -= size; break;
          case 'take':      end = nativeMin(end, start + size); break;
          case 'takeRight': start = nativeMax(start, end - size); break;
        }
      }
      return { 'start': start, 'end': end };
    }

    /**
     * Extracts wrapper details from the `source` body comment.
     *
     * @private
     * @param {string} source The source to inspect.
     * @returns {Array} Returns the wrapper details.
     */
    function getWrapDetails(source) {
      var match = source.match(reWrapDetails);
      return match ? match[1].split(reSplitDetails) : [];
    }

    /**
     * Checks if `path` exists on `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @param {Function} hasFunc The function to check properties.
     * @returns {boolean} Returns `true` if `path` exists, else `false`.
     */
    function hasPath(object, path, hasFunc) {
      path = castPath(path, object);

      var index = -1,
          length = path.length,
          result = false;

      while (++index < length) {
        var key = toKey(path[index]);
        if (!(result = object != null && hasFunc(object, key))) {
          break;
        }
        object = object[key];
      }
      if (result || ++index != length) {
        return result;
      }
      length = object == null ? 0 : object.length;
      return !!length && isLength(length) && isIndex(key, length) &&
        (isArray(object) || isArguments(object));
    }

    /**
     * Initializes an array clone.
     *
     * @private
     * @param {Array} array The array to clone.
     * @returns {Array} Returns the initialized clone.
     */
    function initCloneArray(array) {
      var length = array.length,
          result = new array.constructor(length);

      // Add properties assigned by `RegExp#exec`.
      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
        result.index = array.index;
        result.input = array.input;
      }
      return result;
    }

    /**
     * Initializes an object clone.
     *
     * @private
     * @param {Object} object The object to clone.
     * @returns {Object} Returns the initialized clone.
     */
    function initCloneObject(object) {
      return (typeof object.constructor == 'function' && !isPrototype(object))
        ? baseCreate(getPrototype(object))
        : {};
    }

    /**
     * Initializes an object clone based on its `toStringTag`.
     *
     * **Note:** This function only supports cloning values with tags of
     * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
     *
     * @private
     * @param {Object} object The object to clone.
     * @param {string} tag The `toStringTag` of the object to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the initialized clone.
     */
    function initCloneByTag(object, tag, isDeep) {
      var Ctor = object.constructor;
      switch (tag) {
        case arrayBufferTag:
          return cloneArrayBuffer(object);

        case boolTag:
        case dateTag:
          return new Ctor(+object);

        case dataViewTag:
          return cloneDataView(object, isDeep);

        case float32Tag: case float64Tag:
        case int8Tag: case int16Tag: case int32Tag:
        case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
          return cloneTypedArray(object, isDeep);

        case mapTag:
          return new Ctor;

        case numberTag:
        case stringTag:
          return new Ctor(object);

        case regexpTag:
          return cloneRegExp(object);

        case setTag:
          return new Ctor;

        case symbolTag:
          return cloneSymbol(object);
      }
    }

    /**
     * Inserts wrapper `details` in a comment at the top of the `source` body.
     *
     * @private
     * @param {string} source The source to modify.
     * @returns {Array} details The details to insert.
     * @returns {string} Returns the modified source.
     */
    function insertWrapDetails(source, details) {
      var length = details.length;
      if (!length) {
        return source;
      }
      var lastIndex = length - 1;
      details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
      details = details.join(length > 2 ? ', ' : ' ');
      return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
    }

    /**
     * Checks if `value` is a flattenable `arguments` object or array.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
     */
    function isFlattenable(value) {
      return isArray(value) || isArguments(value) ||
        !!(spreadableSymbol && value && value[spreadableSymbol]);
    }

    /**
     * Checks if `value` is a valid array-like index.
     *
     * @private
     * @param {*} value The value to check.
     * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
     * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
     */
    function isIndex(value, length) {
      var type = typeof value;
      length = length == null ? MAX_SAFE_INTEGER : length;

      return !!length &&
        (type == 'number' ||
          (type != 'symbol' && reIsUint.test(value))) &&
            (value > -1 && value % 1 == 0 && value < length);
    }

    /**
     * Checks if the given arguments are from an iteratee call.
     *
     * @private
     * @param {*} value The potential iteratee value argument.
     * @param {*} index The potential iteratee index or key argument.
     * @param {*} object The potential iteratee object argument.
     * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
     *  else `false`.
     */
    function isIterateeCall(value, index, object) {
      if (!isObject(object)) {
        return false;
      }
      var type = typeof index;
      if (type == 'number'
            ? (isArrayLike(object) && isIndex(index, object.length))
            : (type == 'string' && index in object)
          ) {
        return eq(object[index], value);
      }
      return false;
    }

    /**
     * Checks if `value` is a property name and not a property path.
     *
     * @private
     * @param {*} value The value to check.
     * @param {Object} [object] The object to query keys on.
     * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
     */
    function isKey(value, object) {
      if (isArray(value)) {
        return false;
      }
      var type = typeof value;
      if (type == 'number' || type == 'symbol' || type == 'boolean' ||
          value == null || isSymbol(value)) {
        return true;
      }
      return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
        (object != null && value in Object(object));
    }

    /**
     * Checks if `value` is suitable for use as unique object key.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
     */
    function isKeyable(value) {
      var type = typeof value;
      return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
        ? (value !== '__proto__')
        : (value === null);
    }

    /**
     * Checks if `func` has a lazy counterpart.
     *
     * @private
     * @param {Function} func The function to check.
     * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
     *  else `false`.
     */
    function isLaziable(func) {
      var funcName = getFuncName(func),
          other = lodash[funcName];

      if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
        return false;
      }
      if (func === other) {
        return true;
      }
      var data = getData(other);
      return !!data && func === data[0];
    }

    /**
     * Checks if `func` has its source masked.
     *
     * @private
     * @param {Function} func The function to check.
     * @returns {boolean} Returns `true` if `func` is masked, else `false`.
     */
    function isMasked(func) {
      return !!maskSrcKey && (maskSrcKey in func);
    }

    /**
     * Checks if `func` is capable of being masked.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
     */
    var isMaskable = coreJsData ? isFunction : stubFalse;

    /**
     * Checks if `value` is likely a prototype object.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
     */
    function isPrototype(value) {
      var Ctor = value && value.constructor,
          proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;

      return value === proto;
    }

    /**
     * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` if suitable for strict
     *  equality comparisons, else `false`.
     */
    function isStrictComparable(value) {
      return value === value && !isObject(value);
    }

    /**
     * A specialized version of `matchesProperty` for source values suitable
     * for strict equality comparisons, i.e. `===`.
     *
     * @private
     * @param {string} key The key of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new spec function.
     */
    function matchesStrictComparable(key, srcValue) {
      return function(object) {
        if (object == null) {
          return false;
        }
        return object[key] === srcValue &&
          (srcValue !== undefined || (key in Object(object)));
      };
    }

    /**
     * A specialized version of `_.memoize` which clears the memoized function's
     * cache when it exceeds `MAX_MEMOIZE_SIZE`.
     *
     * @private
     * @param {Function} func The function to have its output memoized.
     * @returns {Function} Returns the new memoized function.
     */
    function memoizeCapped(func) {
      var result = memoize(func, function(key) {
        if (cache.size === MAX_MEMOIZE_SIZE) {
          cache.clear();
        }
        return key;
      });

      var cache = result.cache;
      return result;
    }

    /**
     * Merges the function metadata of `source` into `data`.
     *
     * Merging metadata reduces the number of wrappers used to invoke a function.
     * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
     * may be applied regardless of execution order. Methods like `_.ary` and
     * `_.rearg` modify function arguments, making the order in which they are
     * executed important, preventing the merging of metadata. However, we make
     * an exception for a safe combined case where curried functions have `_.ary`
     * and or `_.rearg` applied.
     *
     * @private
     * @param {Array} data The destination metadata.
     * @param {Array} source The source metadata.
     * @returns {Array} Returns `data`.
     */
    function mergeData(data, source) {
      var bitmask = data[1],
          srcBitmask = source[1],
          newBitmask = bitmask | srcBitmask,
          isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);

      var isCombo =
        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
        ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));

      // Exit early if metadata can't be merged.
      if (!(isCommon || isCombo)) {
        return data;
      }
      // Use source `thisArg` if available.
      if (srcBitmask & WRAP_BIND_FLAG) {
        data[2] = source[2];
        // Set when currying a bound function.
        newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
      }
      // Compose partial arguments.
      var value = source[3];
      if (value) {
        var partials = data[3];
        data[3] = partials ? composeArgs(partials, value, source[4]) : value;
        data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
      }
      // Compose partial right arguments.
      value = source[5];
      if (value) {
        partials = data[5];
        data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
        data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
      }
      // Use source `argPos` if available.
      value = source[7];
      if (value) {
        data[7] = value;
      }
      // Use source `ary` if it's smaller.
      if (srcBitmask & WRAP_ARY_FLAG) {
        data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
      }
      // Use source `arity` if one is not provided.
      if (data[9] == null) {
        data[9] = source[9];
      }
      // Use source `func` and merge bitmasks.
      data[0] = source[0];
      data[1] = newBitmask;

      return data;
    }

    /**
     * This function is like
     * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
     * except that it includes inherited enumerable properties.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function nativeKeysIn(object) {
      var result = [];
      if (object != null) {
        for (var key in Object(object)) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * Converts `value` to a string using `Object.prototype.toString`.
     *
     * @private
     * @param {*} value The value to convert.
     * @returns {string} Returns the converted string.
     */
    function objectToString(value) {
      return nativeObjectToString.call(value);
    }

    /**
     * A specialized version of `baseRest` which transforms the rest array.
     *
     * @private
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @param {Function} transform The rest array transform.
     * @returns {Function} Returns the new function.
     */
    function overRest(func, start, transform) {
      start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
      return function() {
        var args = arguments,
            index = -1,
            length = nativeMax(args.length - start, 0),
            array = Array(length);

        while (++index < length) {
          array[index] = args[start + index];
        }
        index = -1;
        var otherArgs = Array(start + 1);
        while (++index < start) {
          otherArgs[index] = args[index];
        }
        otherArgs[start] = transform(array);
        return apply(func, this, otherArgs);
      };
    }

    /**
     * Gets the parent value at `path` of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array} path The path to get the parent value of.
     * @returns {*} Returns the parent value.
     */
    function parent(object, path) {
      return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
    }

    /**
     * Reorder `array` according to the specified indexes where the element at
     * the first index is assigned as the first element, the element at
     * the second index is assigned as the second element, and so on.
     *
     * @private
     * @param {Array} array The array to reorder.
     * @param {Array} indexes The arranged array indexes.
     * @returns {Array} Returns `array`.
     */
    function reorder(array, indexes) {
      var arrLength = array.length,
          length = nativeMin(indexes.length, arrLength),
          oldArray = copyArray(array);

      while (length--) {
        var index = indexes[length];
        array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
      }
      return array;
    }

    /**
     * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
     *
     * @private
     * @param {Object} object The object to query.
     * @param {string} key The key of the property to get.
     * @returns {*} Returns the property value.
     */
    function safeGet(object, key) {
      if (key === 'constructor' && typeof object[key] === 'function') {
        return;
      }

      if (key == '__proto__') {
        return;
      }

      return object[key];
    }

    /**
     * Sets metadata for `func`.
     *
     * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
     * period of time, it will trip its breaker and transition to an identity
     * function to avoid garbage collection pauses in V8. See
     * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
     * for more details.
     *
     * @private
     * @param {Function} func The function to associate metadata with.
     * @param {*} data The metadata.
     * @returns {Function} Returns `func`.
     */
    var setData = shortOut(baseSetData);

    /**
     * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
     *
     * @private
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @returns {number|Object} Returns the timer id or timeout object.
     */
    var setTimeout = ctxSetTimeout || function(func, wait) {
      return root.setTimeout(func, wait);
    };

    /**
     * Sets the `toString` method of `func` to return `string`.
     *
     * @private
     * @param {Function} func The function to modify.
     * @param {Function} string The `toString` result.
     * @returns {Function} Returns `func`.
     */
    var setToString = shortOut(baseSetToString);

    /**
     * Sets the `toString` method of `wrapper` to mimic the source of `reference`
     * with wrapper details in a comment at the top of the source body.
     *
     * @private
     * @param {Function} wrapper The function to modify.
     * @param {Function} reference The reference function.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @returns {Function} Returns `wrapper`.
     */
    function setWrapToString(wrapper, reference, bitmask) {
      var source = (reference + '');
      return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
    }

    /**
     * Creates a function that'll short out and invoke `identity` instead
     * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
     * milliseconds.
     *
     * @private
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new shortable function.
     */
    function shortOut(func) {
      var count = 0,
          lastCalled = 0;

      return function() {
        var stamp = nativeNow(),
            remaining = HOT_SPAN - (stamp - lastCalled);

        lastCalled = stamp;
        if (remaining > 0) {
          if (++count >= HOT_COUNT) {
            return arguments[0];
          }
        } else {
          count = 0;
        }
        return func.apply(undefined, arguments);
      };
    }

    /**
     * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
     *
     * @private
     * @param {Array} array The array to shuffle.
     * @param {number} [size=array.length] The size of `array`.
     * @returns {Array} Returns `array`.
     */
    function shuffleSelf(array, size) {
      var index = -1,
          length = array.length,
          lastIndex = length - 1;

      size = size === undefined ? length : size;
      while (++index < size) {
        var rand = baseRandom(index, lastIndex),
            value = array[rand];

        array[rand] = array[index];
        array[index] = value;
      }
      array.length = size;
      return array;
    }

    /**
     * Converts `string` to a property path array.
     *
     * @private
     * @param {string} string The string to convert.
     * @returns {Array} Returns the property path array.
     */
    var stringToPath = memoizeCapped(function(string) {
      var result = [];
      if (string.charCodeAt(0) === 46 /* . */) {
        result.push('');
      }
      string.replace(rePropName, function(match, number, quote, subString) {
        result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
      });
      return result;
    });

    /**
     * Converts `value` to a string key if it's not a string or symbol.
     *
     * @private
     * @param {*} value The value to inspect.
     * @returns {string|symbol} Returns the key.
     */
    function toKey(value) {
      if (typeof value == 'string' || isSymbol(value)) {
        return value;
      }
      var result = (value + '');
      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
    }

    /**
     * Converts `func` to its source code.
     *
     * @private
     * @param {Function} func The function to convert.
     * @returns {string} Returns the source code.
     */
    function toSource(func) {
      if (func != null) {
        try {
          return funcToString.call(func);
        } catch (e) {}
        try {
          return (func + '');
        } catch (e) {}
      }
      return '';
    }

    /**
     * Updates wrapper `details` based on `bitmask` flags.
     *
     * @private
     * @returns {Array} details The details to modify.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @returns {Array} Returns `details`.
     */
    function updateWrapDetails(details, bitmask) {
      arrayEach(wrapFlags, function(pair) {
        var value = '_.' + pair[0];
        if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
          details.push(value);
        }
      });
      return details.sort();
    }

    /**
     * Creates a clone of `wrapper`.
     *
     * @private
     * @param {Object} wrapper The wrapper to clone.
     * @returns {Object} Returns the cloned wrapper.
     */
    function wrapperClone(wrapper) {
      if (wrapper instanceof LazyWrapper) {
        return wrapper.clone();
      }
      var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
      result.__actions__ = copyArray(wrapper.__actions__);
      result.__index__  = wrapper.__index__;
      result.__values__ = wrapper.__values__;
      return result;
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates an array of elements split into groups the length of `size`.
     * If `array` can't be split evenly, the final chunk will be the remaining
     * elements.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to process.
     * @param {number} [size=1] The length of each chunk
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the new array of chunks.
     * @example
     *
     * _.chunk(['a', 'b', 'c', 'd'], 2);
     * // => [['a', 'b'], ['c', 'd']]
     *
     * _.chunk(['a', 'b', 'c', 'd'], 3);
     * // => [['a', 'b', 'c'], ['d']]
     */
    function chunk(array, size, guard) {
      if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
        size = 1;
      } else {
        size = nativeMax(toInteger(size), 0);
      }
      var length = array == null ? 0 : array.length;
      if (!length || size < 1) {
        return [];
      }
      var index = 0,
          resIndex = 0,
          result = Array(nativeCeil(length / size));

      while (index < length) {
        result[resIndex++] = baseSlice(array, index, (index += size));
      }
      return result;
    }

    /**
     * Creates an array with all falsey values removed. The values `false`, `null`,
     * `0`, `""`, `undefined`, and `NaN` are falsey.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to compact.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.compact([0, 1, false, 2, '', 3]);
     * // => [1, 2, 3]
     */
    function compact(array) {
      var index = -1,
          length = array == null ? 0 : array.length,
          resIndex = 0,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (value) {
          result[resIndex++] = value;
        }
      }
      return result;
    }

    /**
     * Creates a new array concatenating `array` with any additional arrays
     * and/or values.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to concatenate.
     * @param {...*} [values] The values to concatenate.
     * @returns {Array} Returns the new concatenated array.
     * @example
     *
     * var array = [1];
     * var other = _.concat(array, 2, [3], [[4]]);
     *
     * console.log(other);
     * // => [1, 2, 3, [4]]
     *
     * console.log(array);
     * // => [1]
     */
    function concat() {
      var length = arguments.length;
      if (!length) {
        return [];
      }
      var args = Array(length - 1),
          array = arguments[0],
          index = length;

      while (index--) {
        args[index - 1] = arguments[index];
      }
      return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
    }

    /**
     * Creates an array of `array` values not included in the other given arrays
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons. The order and references of result values are
     * determined by the first array.
     *
     * **Note:** Unlike `_.pullAll`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     * @see _.without, _.xor
     * @example
     *
     * _.difference([2, 1], [2, 3]);
     * // => [1]
     */
    var difference = baseRest(function(array, values) {
      return isArrayLikeObject(array)
        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
        : [];
    });

    /**
     * This method is like `_.difference` except that it accepts `iteratee` which
     * is invoked for each element of `array` and `values` to generate the criterion
     * by which they're compared. The order and references of result values are
     * determined by the first array. The iteratee is invoked with one argument:
     * (value).
     *
     * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The values to exclude.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
     * // => [1.2]
     *
     * // The `_.property` iteratee shorthand.
     * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
     * // => [{ 'x': 2 }]
     */
    var differenceBy = baseRest(function(array, values) {
      var iteratee = last(values);
      if (isArrayLikeObject(iteratee)) {
        iteratee = undefined;
      }
      return isArrayLikeObject(array)
        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
        : [];
    });

    /**
     * This method is like `_.difference` except that it accepts `comparator`
     * which is invoked to compare elements of `array` to `values`. The order and
     * references of result values are determined by the first array. The comparator
     * is invoked with two arguments: (arrVal, othVal).
     *
     * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The values to exclude.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     *
     * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
     * // => [{ 'x': 2, 'y': 1 }]
     */
    var differenceWith = baseRest(function(array, values) {
      var comparator = last(values);
      if (isArrayLikeObject(comparator)) {
        comparator = undefined;
      }
      return isArrayLikeObject(array)
        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
        : [];
    });

    /**
     * Creates a slice of `array` with `n` elements dropped from the beginning.
     *
     * @static
     * @memberOf _
     * @since 0.5.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to drop.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.drop([1, 2, 3]);
     * // => [2, 3]
     *
     * _.drop([1, 2, 3], 2);
     * // => [3]
     *
     * _.drop([1, 2, 3], 5);
     * // => []
     *
     * _.drop([1, 2, 3], 0);
     * // => [1, 2, 3]
     */
    function drop(array, n, guard) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      return baseSlice(array, n < 0 ? 0 : n, length);
    }

    /**
     * Creates a slice of `array` with `n` elements dropped from the end.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to drop.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.dropRight([1, 2, 3]);
     * // => [1, 2]
     *
     * _.dropRight([1, 2, 3], 2);
     * // => [1]
     *
     * _.dropRight([1, 2, 3], 5);
     * // => []
     *
     * _.dropRight([1, 2, 3], 0);
     * // => [1, 2, 3]
     */
    function dropRight(array, n, guard) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      n = length - n;
      return baseSlice(array, 0, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` excluding elements dropped from the end.
     * Elements are dropped until `predicate` returns falsey. The predicate is
     * invoked with three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.dropRightWhile(users, function(o) { return !o.active; });
     * // => objects for ['barney']
     *
     * // The `_.matches` iteratee shorthand.
     * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
     * // => objects for ['barney', 'fred']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.dropRightWhile(users, ['active', false]);
     * // => objects for ['barney']
     *
     * // The `_.property` iteratee shorthand.
     * _.dropRightWhile(users, 'active');
     * // => objects for ['barney', 'fred', 'pebbles']
     */
    function dropRightWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), true, true)
        : [];
    }

    /**
     * Creates a slice of `array` excluding elements dropped from the beginning.
     * Elements are dropped until `predicate` returns falsey. The predicate is
     * invoked with three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.dropWhile(users, function(o) { return !o.active; });
     * // => objects for ['pebbles']
     *
     * // The `_.matches` iteratee shorthand.
     * _.dropWhile(users, { 'user': 'barney', 'active': false });
     * // => objects for ['fred', 'pebbles']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.dropWhile(users, ['active', false]);
     * // => objects for ['pebbles']
     *
     * // The `_.property` iteratee shorthand.
     * _.dropWhile(users, 'active');
     * // => objects for ['barney', 'fred', 'pebbles']
     */
    function dropWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), true)
        : [];
    }

    /**
     * Fills elements of `array` with `value` from `start` up to, but not
     * including, `end`.
     *
     * **Note:** This method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 3.2.0
     * @category Array
     * @param {Array} array The array to fill.
     * @param {*} value The value to fill `array` with.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _.fill(array, 'a');
     * console.log(array);
     * // => ['a', 'a', 'a']
     *
     * _.fill(Array(3), 2);
     * // => [2, 2, 2]
     *
     * _.fill([4, 6, 8, 10], '*', 1, 3);
     * // => [4, '*', '*', 10]
     */
    function fill(array, value, start, end) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
        start = 0;
        end = length;
      }
      return baseFill(array, value, start, end);
    }

    /**
     * This method is like `_.find` except that it returns the index of the first
     * element `predicate` returns truthy for instead of the element itself.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.findIndex(users, function(o) { return o.user == 'barney'; });
     * // => 0
     *
     * // The `_.matches` iteratee shorthand.
     * _.findIndex(users, { 'user': 'fred', 'active': false });
     * // => 1
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findIndex(users, ['active', false]);
     * // => 0
     *
     * // The `_.property` iteratee shorthand.
     * _.findIndex(users, 'active');
     * // => 2
     */
    function findIndex(array, predicate, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = fromIndex == null ? 0 : toInteger(fromIndex);
      if (index < 0) {
        index = nativeMax(length + index, 0);
      }
      return baseFindIndex(array, getIteratee(predicate, 3), index);
    }

    /**
     * This method is like `_.findIndex` except that it iterates over elements
     * of `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=array.length-1] The index to search from.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
     * // => 2
     *
     * // The `_.matches` iteratee shorthand.
     * _.findLastIndex(users, { 'user': 'barney', 'active': true });
     * // => 0
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findLastIndex(users, ['active', false]);
     * // => 2
     *
     * // The `_.property` iteratee shorthand.
     * _.findLastIndex(users, 'active');
     * // => 0
     */
    function findLastIndex(array, predicate, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = length - 1;
      if (fromIndex !== undefined) {
        index = toInteger(fromIndex);
        index = fromIndex < 0
          ? nativeMax(length + index, 0)
          : nativeMin(index, length - 1);
      }
      return baseFindIndex(array, getIteratee(predicate, 3), index, true);
    }

    /**
     * Flattens `array` a single level deep.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to flatten.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * _.flatten([1, [2, [3, [4]], 5]]);
     * // => [1, 2, [3, [4]], 5]
     */
    function flatten(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseFlatten(array, 1) : [];
    }

    /**
     * Recursively flattens `array`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to flatten.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * _.flattenDeep([1, [2, [3, [4]], 5]]);
     * // => [1, 2, 3, 4, 5]
     */
    function flattenDeep(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseFlatten(array, INFINITY) : [];
    }

    /**
     * Recursively flatten `array` up to `depth` times.
     *
     * @static
     * @memberOf _
     * @since 4.4.0
     * @category Array
     * @param {Array} array The array to flatten.
     * @param {number} [depth=1] The maximum recursion depth.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * var array = [1, [2, [3, [4]], 5]];
     *
     * _.flattenDepth(array, 1);
     * // => [1, 2, [3, [4]], 5]
     *
     * _.flattenDepth(array, 2);
     * // => [1, 2, 3, [4], 5]
     */
    function flattenDepth(array, depth) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      depth = depth === undefined ? 1 : toInteger(depth);
      return baseFlatten(array, depth);
    }

    /**
     * The inverse of `_.toPairs`; this method returns an object composed
     * from key-value `pairs`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} pairs The key-value pairs.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.fromPairs([['a', 1], ['b', 2]]);
     * // => { 'a': 1, 'b': 2 }
     */
    function fromPairs(pairs) {
      var index = -1,
          length = pairs == null ? 0 : pairs.length,
          result = {};

      while (++index < length) {
        var pair = pairs[index];
        result[pair[0]] = pair[1];
      }
      return result;
    }

    /**
     * Gets the first element of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @alias first
     * @category Array
     * @param {Array} array The array to query.
     * @returns {*} Returns the first element of `array`.
     * @example
     *
     * _.head([1, 2, 3]);
     * // => 1
     *
     * _.head([]);
     * // => undefined
     */
    function head(array) {
      return (array && array.length) ? array[0] : undefined;
    }

    /**
     * Gets the index at which the first occurrence of `value` is found in `array`
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons. If `fromIndex` is negative, it's used as the
     * offset from the end of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.indexOf([1, 2, 1, 2], 2);
     * // => 1
     *
     * // Search from the `fromIndex`.
     * _.indexOf([1, 2, 1, 2], 2, 2);
     * // => 3
     */
    function indexOf(array, value, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = fromIndex == null ? 0 : toInteger(fromIndex);
      if (index < 0) {
        index = nativeMax(length + index, 0);
      }
      return baseIndexOf(array, value, index);
    }

    /**
     * Gets all but the last element of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to query.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.initial([1, 2, 3]);
     * // => [1, 2]
     */
    function initial(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseSlice(array, 0, -1) : [];
    }

    /**
     * Creates an array of unique values that are included in all given arrays
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons. The order and references of result values are
     * determined by the first array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of intersecting values.
     * @example
     *
     * _.intersection([2, 1], [2, 3]);
     * // => [2]
     */
    var intersection = baseRest(function(arrays) {
      var mapped = arrayMap(arrays, castArrayLikeObject);
      return (mapped.length && mapped[0] === arrays[0])
        ? baseIntersection(mapped)
        : [];
    });

    /**
     * This method is like `_.intersection` except that it accepts `iteratee`
     * which is invoked for each element of each `arrays` to generate the criterion
     * by which they're compared. The order and references of result values are
     * determined by the first array. The iteratee is invoked with one argument:
     * (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of intersecting values.
     * @example
     *
     * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
     * // => [2.1]
     *
     * // The `_.property` iteratee shorthand.
     * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }]
     */
    var intersectionBy = baseRest(function(arrays) {
      var iteratee = last(arrays),
          mapped = arrayMap(arrays, castArrayLikeObject);

      if (iteratee === last(mapped)) {
        iteratee = undefined;
      } else {
        mapped.pop();
      }
      return (mapped.length && mapped[0] === arrays[0])
        ? baseIntersection(mapped, getIteratee(iteratee, 2))
        : [];
    });

    /**
     * This method is like `_.intersection` except that it accepts `comparator`
     * which is invoked to compare elements of `arrays`. The order and references
     * of result values are determined by the first array. The comparator is
     * invoked with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of intersecting values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.intersectionWith(objects, others, _.isEqual);
     * // => [{ 'x': 1, 'y': 2 }]
     */
    var intersectionWith = baseRest(function(arrays) {
      var comparator = last(arrays),
          mapped = arrayMap(arrays, castArrayLikeObject);

      comparator = typeof comparator == 'function' ? comparator : undefined;
      if (comparator) {
        mapped.pop();
      }
      return (mapped.length && mapped[0] === arrays[0])
        ? baseIntersection(mapped, undefined, comparator)
        : [];
    });

    /**
     * Converts all elements in `array` into a string separated by `separator`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to convert.
     * @param {string} [separator=','] The element separator.
     * @returns {string} Returns the joined string.
     * @example
     *
     * _.join(['a', 'b', 'c'], '~');
     * // => 'a~b~c'
     */
    function join(array, separator) {
      return array == null ? '' : nativeJoin.call(array, separator);
    }

    /**
     * Gets the last element of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to query.
     * @returns {*} Returns the last element of `array`.
     * @example
     *
     * _.last([1, 2, 3]);
     * // => 3
     */
    function last(array) {
      var length = array == null ? 0 : array.length;
      return length ? array[length - 1] : undefined;
    }

    /**
     * This method is like `_.indexOf` except that it iterates over elements of
     * `array` from right to left.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=array.length-1] The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.lastIndexOf([1, 2, 1, 2], 2);
     * // => 3
     *
     * // Search from the `fromIndex`.
     * _.lastIndexOf([1, 2, 1, 2], 2, 2);
     * // => 1
     */
    function lastIndexOf(array, value, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = length;
      if (fromIndex !== undefined) {
        index = toInteger(fromIndex);
        index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
      }
      return value === value
        ? strictLastIndexOf(array, value, index)
        : baseFindIndex(array, baseIsNaN, index, true);
    }

    /**
     * Gets the element at index `n` of `array`. If `n` is negative, the nth
     * element from the end is returned.
     *
     * @static
     * @memberOf _
     * @since 4.11.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=0] The index of the element to return.
     * @returns {*} Returns the nth element of `array`.
     * @example
     *
     * var array = ['a', 'b', 'c', 'd'];
     *
     * _.nth(array, 1);
     * // => 'b'
     *
     * _.nth(array, -2);
     * // => 'c';
     */
    function nth(array, n) {
      return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
    }

    /**
     * Removes all given values from `array` using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
     * to remove elements from an array by predicate.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {...*} [values] The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
     *
     * _.pull(array, 'a', 'c');
     * console.log(array);
     * // => ['b', 'b']
     */
    var pull = baseRest(pullAll);

    /**
     * This method is like `_.pull` except that it accepts an array of values to remove.
     *
     * **Note:** Unlike `_.difference`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
     *
     * _.pullAll(array, ['a', 'c']);
     * console.log(array);
     * // => ['b', 'b']
     */
    function pullAll(array, values) {
      return (array && array.length && values && values.length)
        ? basePullAll(array, values)
        : array;
    }

    /**
     * This method is like `_.pullAll` except that it accepts `iteratee` which is
     * invoked for each element of `array` and `values` to generate the criterion
     * by which they're compared. The iteratee is invoked with one argument: (value).
     *
     * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
     *
     * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
     * console.log(array);
     * // => [{ 'x': 2 }]
     */
    function pullAllBy(array, values, iteratee) {
      return (array && array.length && values && values.length)
        ? basePullAll(array, values, getIteratee(iteratee, 2))
        : array;
    }

    /**
     * This method is like `_.pullAll` except that it accepts `comparator` which
     * is invoked to compare elements of `array` to `values`. The comparator is
     * invoked with two arguments: (arrVal, othVal).
     *
     * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 4.6.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
     *
     * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
     * console.log(array);
     * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
     */
    function pullAllWith(array, values, comparator) {
      return (array && array.length && values && values.length)
        ? basePullAll(array, values, undefined, comparator)
        : array;
    }

    /**
     * Removes elements from `array` corresponding to `indexes` and returns an
     * array of removed elements.
     *
     * **Note:** Unlike `_.at`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {...(number|number[])} [indexes] The indexes of elements to remove.
     * @returns {Array} Returns the new array of removed elements.
     * @example
     *
     * var array = ['a', 'b', 'c', 'd'];
     * var pulled = _.pullAt(array, [1, 3]);
     *
     * console.log(array);
     * // => ['a', 'c']
     *
     * console.log(pulled);
     * // => ['b', 'd']
     */
    var pullAt = flatRest(function(array, indexes) {
      var length = array == null ? 0 : array.length,
          result = baseAt(array, indexes);

      basePullAt(array, arrayMap(indexes, function(index) {
        return isIndex(index, length) ? +index : index;
      }).sort(compareAscending));

      return result;
    });

    /**
     * Removes all elements from `array` that `predicate` returns truthy for
     * and returns an array of the removed elements. The predicate is invoked
     * with three arguments: (value, index, array).
     *
     * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
     * to pull elements from an array by value.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new array of removed elements.
     * @example
     *
     * var array = [1, 2, 3, 4];
     * var evens = _.remove(array, function(n) {
     *   return n % 2 == 0;
     * });
     *
     * console.log(array);
     * // => [1, 3]
     *
     * console.log(evens);
     * // => [2, 4]
     */
    function remove(array, predicate) {
      var result = [];
      if (!(array && array.length)) {
        return result;
      }
      var index = -1,
          indexes = [],
          length = array.length;

      predicate = getIteratee(predicate, 3);
      while (++index < length) {
        var value = array[index];
        if (predicate(value, index, array)) {
          result.push(value);
          indexes.push(index);
        }
      }
      basePullAt(array, indexes);
      return result;
    }

    /**
     * Reverses `array` so that the first element becomes the last, the second
     * element becomes the second to last, and so on.
     *
     * **Note:** This method mutates `array` and is based on
     * [`Array#reverse`](https://mdn.io/Array/reverse).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _.reverse(array);
     * // => [3, 2, 1]
     *
     * console.log(array);
     * // => [3, 2, 1]
     */
    function reverse(array) {
      return array == null ? array : nativeReverse.call(array);
    }

    /**
     * Creates a slice of `array` from `start` up to, but not including, `end`.
     *
     * **Note:** This method is used instead of
     * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
     * returned.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to slice.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the slice of `array`.
     */
    function slice(array, start, end) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
        start = 0;
        end = length;
      }
      else {
        start = start == null ? 0 : toInteger(start);
        end = end === undefined ? length : toInteger(end);
      }
      return baseSlice(array, start, end);
    }

    /**
     * Uses a binary search to determine the lowest index at which `value`
     * should be inserted into `array` in order to maintain its sort order.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedIndex([30, 50], 40);
     * // => 1
     */
    function sortedIndex(array, value) {
      return baseSortedIndex(array, value);
    }

    /**
     * This method is like `_.sortedIndex` except that it accepts `iteratee`
     * which is invoked for `value` and each element of `array` to compute their
     * sort ranking. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * var objects = [{ 'x': 4 }, { 'x': 5 }];
     *
     * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
     * // => 0
     *
     * // The `_.property` iteratee shorthand.
     * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
     * // => 0
     */
    function sortedIndexBy(array, value, iteratee) {
      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
    }

    /**
     * This method is like `_.indexOf` except that it performs a binary
     * search on a sorted `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
     * // => 1
     */
    function sortedIndexOf(array, value) {
      var length = array == null ? 0 : array.length;
      if (length) {
        var index = baseSortedIndex(array, value);
        if (index < length && eq(array[index], value)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * This method is like `_.sortedIndex` except that it returns the highest
     * index at which `value` should be inserted into `array` in order to
     * maintain its sort order.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
     * // => 4
     */
    function sortedLastIndex(array, value) {
      return baseSortedIndex(array, value, true);
    }

    /**
     * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
     * which is invoked for `value` and each element of `array` to compute their
     * sort ranking. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * var objects = [{ 'x': 4 }, { 'x': 5 }];
     *
     * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
     * // => 1
     *
     * // The `_.property` iteratee shorthand.
     * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
     * // => 1
     */
    function sortedLastIndexBy(array, value, iteratee) {
      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
    }

    /**
     * This method is like `_.lastIndexOf` except that it performs a binary
     * search on a sorted `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
     * // => 3
     */
    function sortedLastIndexOf(array, value) {
      var length = array == null ? 0 : array.length;
      if (length) {
        var index = baseSortedIndex(array, value, true) - 1;
        if (eq(array[index], value)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * This method is like `_.uniq` except that it's designed and optimized
     * for sorted arrays.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.sortedUniq([1, 1, 2]);
     * // => [1, 2]
     */
    function sortedUniq(array) {
      return (array && array.length)
        ? baseSortedUniq(array)
        : [];
    }

    /**
     * This method is like `_.uniqBy` except that it's designed and optimized
     * for sorted arrays.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
     * // => [1.1, 2.3]
     */
    function sortedUniqBy(array, iteratee) {
      return (array && array.length)
        ? baseSortedUniq(array, getIteratee(iteratee, 2))
        : [];
    }

    /**
     * Gets all but the first element of `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.tail([1, 2, 3]);
     * // => [2, 3]
     */
    function tail(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseSlice(array, 1, length) : [];
    }

    /**
     * Creates a slice of `array` with `n` elements taken from the beginning.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to take.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.take([1, 2, 3]);
     * // => [1]
     *
     * _.take([1, 2, 3], 2);
     * // => [1, 2]
     *
     * _.take([1, 2, 3], 5);
     * // => [1, 2, 3]
     *
     * _.take([1, 2, 3], 0);
     * // => []
     */
    function take(array, n, guard) {
      if (!(array && array.length)) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      return baseSlice(array, 0, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` with `n` elements taken from the end.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to take.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.takeRight([1, 2, 3]);
     * // => [3]
     *
     * _.takeRight([1, 2, 3], 2);
     * // => [2, 3]
     *
     * _.takeRight([1, 2, 3], 5);
     * // => [1, 2, 3]
     *
     * _.takeRight([1, 2, 3], 0);
     * // => []
     */
    function takeRight(array, n, guard) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      n = length - n;
      return baseSlice(array, n < 0 ? 0 : n, length);
    }

    /**
     * Creates a slice of `array` with elements taken from the end. Elements are
     * taken until `predicate` returns falsey. The predicate is invoked with
     * three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.takeRightWhile(users, function(o) { return !o.active; });
     * // => objects for ['fred', 'pebbles']
     *
     * // The `_.matches` iteratee shorthand.
     * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
     * // => objects for ['pebbles']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.takeRightWhile(users, ['active', false]);
     * // => objects for ['fred', 'pebbles']
     *
     * // The `_.property` iteratee shorthand.
     * _.takeRightWhile(users, 'active');
     * // => []
     */
    function takeRightWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), false, true)
        : [];
    }

    /**
     * Creates a slice of `array` with elements taken from the beginning. Elements
     * are taken until `predicate` returns falsey. The predicate is invoked with
     * three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.takeWhile(users, function(o) { return !o.active; });
     * // => objects for ['barney', 'fred']
     *
     * // The `_.matches` iteratee shorthand.
     * _.takeWhile(users, { 'user': 'barney', 'active': false });
     * // => objects for ['barney']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.takeWhile(users, ['active', false]);
     * // => objects for ['barney', 'fred']
     *
     * // The `_.property` iteratee shorthand.
     * _.takeWhile(users, 'active');
     * // => []
     */
    function takeWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3))
        : [];
    }

    /**
     * Creates an array of unique values, in order, from all given arrays using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * _.union([2], [1, 2]);
     * // => [2, 1]
     */
    var union = baseRest(function(arrays) {
      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
    });

    /**
     * This method is like `_.union` except that it accepts `iteratee` which is
     * invoked for each element of each `arrays` to generate the criterion by
     * which uniqueness is computed. Result values are chosen from the first
     * array in which the value occurs. The iteratee is invoked with one argument:
     * (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * _.unionBy([2.1], [1.2, 2.3], Math.floor);
     * // => [2.1, 1.2]
     *
     * // The `_.property` iteratee shorthand.
     * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    var unionBy = baseRest(function(arrays) {
      var iteratee = last(arrays);
      if (isArrayLikeObject(iteratee)) {
        iteratee = undefined;
      }
      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
    });

    /**
     * This method is like `_.union` except that it accepts `comparator` which
     * is invoked to compare elements of `arrays`. Result values are chosen from
     * the first array in which the value occurs. The comparator is invoked
     * with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.unionWith(objects, others, _.isEqual);
     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
     */
    var unionWith = baseRest(function(arrays) {
      var comparator = last(arrays);
      comparator = typeof comparator == 'function' ? comparator : undefined;
      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
    });

    /**
     * Creates a duplicate-free version of an array, using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons, in which only the first occurrence of each element
     * is kept. The order of result values is determined by the order they occur
     * in the array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.uniq([2, 1, 2]);
     * // => [2, 1]
     */
    function uniq(array) {
      return (array && array.length) ? baseUniq(array) : [];
    }

    /**
     * This method is like `_.uniq` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the criterion by which
     * uniqueness is computed. The order of result values is determined by the
     * order they occur in the array. The iteratee is invoked with one argument:
     * (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
     * // => [2.1, 1.2]
     *
     * // The `_.property` iteratee shorthand.
     * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    function uniqBy(array, iteratee) {
      return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
    }

    /**
     * This method is like `_.uniq` except that it accepts `comparator` which
     * is invoked to compare elements of `array`. The order of result values is
     * determined by the order they occur in the array.The comparator is invoked
     * with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.uniqWith(objects, _.isEqual);
     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
     */
    function uniqWith(array, comparator) {
      comparator = typeof comparator == 'function' ? comparator : undefined;
      return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
    }

    /**
     * This method is like `_.zip` except that it accepts an array of grouped
     * elements and creates an array regrouping the elements to their pre-zip
     * configuration.
     *
     * @static
     * @memberOf _
     * @since 1.2.0
     * @category Array
     * @param {Array} array The array of grouped elements to process.
     * @returns {Array} Returns the new array of regrouped elements.
     * @example
     *
     * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
     * // => [['a', 1, true], ['b', 2, false]]
     *
     * _.unzip(zipped);
     * // => [['a', 'b'], [1, 2], [true, false]]
     */
    function unzip(array) {
      if (!(array && array.length)) {
        return [];
      }
      var length = 0;
      array = arrayFilter(array, function(group) {
        if (isArrayLikeObject(group)) {
          length = nativeMax(group.length, length);
          return true;
        }
      });
      return baseTimes(length, function(index) {
        return arrayMap(array, baseProperty(index));
      });
    }

    /**
     * This method is like `_.unzip` except that it accepts `iteratee` to specify
     * how regrouped values should be combined. The iteratee is invoked with the
     * elements of each group: (...group).
     *
     * @static
     * @memberOf _
     * @since 3.8.0
     * @category Array
     * @param {Array} array The array of grouped elements to process.
     * @param {Function} [iteratee=_.identity] The function to combine
     *  regrouped values.
     * @returns {Array} Returns the new array of regrouped elements.
     * @example
     *
     * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
     * // => [[1, 10, 100], [2, 20, 200]]
     *
     * _.unzipWith(zipped, _.add);
     * // => [3, 30, 300]
     */
    function unzipWith(array, iteratee) {
      if (!(array && array.length)) {
        return [];
      }
      var result = unzip(array);
      if (iteratee == null) {
        return result;
      }
      return arrayMap(result, function(group) {
        return apply(iteratee, undefined, group);
      });
    }

    /**
     * Creates an array excluding all given values using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * **Note:** Unlike `_.pull`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...*} [values] The values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     * @see _.difference, _.xor
     * @example
     *
     * _.without([2, 1, 2, 3], 1, 2);
     * // => [3]
     */
    var without = baseRest(function(array, values) {
      return isArrayLikeObject(array)
        ? baseDifference(array, values)
        : [];
    });

    /**
     * Creates an array of unique values that is the
     * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
     * of the given arrays. The order of result values is determined by the order
     * they occur in the arrays.
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of filtered values.
     * @see _.difference, _.without
     * @example
     *
     * _.xor([2, 1], [2, 3]);
     * // => [1, 3]
     */
    var xor = baseRest(function(arrays) {
      return baseXor(arrayFilter(arrays, isArrayLikeObject));
    });

    /**
     * This method is like `_.xor` except that it accepts `iteratee` which is
     * invoked for each element of each `arrays` to generate the criterion by
     * which by which they're compared. The order of result values is determined
     * by the order they occur in the arrays. The iteratee is invoked with one
     * argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
     * // => [1.2, 3.4]
     *
     * // The `_.property` iteratee shorthand.
     * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 2 }]
     */
    var xorBy = baseRest(function(arrays) {
      var iteratee = last(arrays);
      if (isArrayLikeObject(iteratee)) {
        iteratee = undefined;
      }
      return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
    });

    /**
     * This method is like `_.xor` except that it accepts `comparator` which is
     * invoked to compare elements of `arrays`. The order of result values is
     * determined by the order they occur in the arrays. The comparator is invoked
     * with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.xorWith(objects, others, _.isEqual);
     * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
     */
    var xorWith = baseRest(function(arrays) {
      var comparator = last(arrays);
      comparator = typeof comparator == 'function' ? comparator : undefined;
      return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
    });

    /**
     * Creates an array of grouped elements, the first of which contains the
     * first elements of the given arrays, the second of which contains the
     * second elements of the given arrays, and so on.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {...Array} [arrays] The arrays to process.
     * @returns {Array} Returns the new array of grouped elements.
     * @example
     *
     * _.zip(['a', 'b'], [1, 2], [true, false]);
     * // => [['a', 1, true], ['b', 2, false]]
     */
    var zip = baseRest(unzip);

    /**
     * This method is like `_.fromPairs` except that it accepts two arrays,
     * one of property identifiers and one of corresponding values.
     *
     * @static
     * @memberOf _
     * @since 0.4.0
     * @category Array
     * @param {Array} [props=[]] The property identifiers.
     * @param {Array} [values=[]] The property values.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.zipObject(['a', 'b'], [1, 2]);
     * // => { 'a': 1, 'b': 2 }
     */
    function zipObject(props, values) {
      return baseZipObject(props || [], values || [], assignValue);
    }

    /**
     * This method is like `_.zipObject` except that it supports property paths.
     *
     * @static
     * @memberOf _
     * @since 4.1.0
     * @category Array
     * @param {Array} [props=[]] The property identifiers.
     * @param {Array} [values=[]] The property values.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
     * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
     */
    function zipObjectDeep(props, values) {
      return baseZipObject(props || [], values || [], baseSet);
    }

    /**
     * This method is like `_.zip` except that it accepts `iteratee` to specify
     * how grouped values should be combined. The iteratee is invoked with the
     * elements of each group: (...group).
     *
     * @static
     * @memberOf _
     * @since 3.8.0
     * @category Array
     * @param {...Array} [arrays] The arrays to process.
     * @param {Function} [iteratee=_.identity] The function to combine
     *  grouped values.
     * @returns {Array} Returns the new array of grouped elements.
     * @example
     *
     * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
     *   return a + b + c;
     * });
     * // => [111, 222]
     */
    var zipWith = baseRest(function(arrays) {
      var length = arrays.length,
          iteratee = length > 1 ? arrays[length - 1] : undefined;

      iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
      return unzipWith(arrays, iteratee);
    });

    /*------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` wrapper instance that wraps `value` with explicit method
     * chain sequences enabled. The result of such sequences must be unwrapped
     * with `_#value`.
     *
     * @static
     * @memberOf _
     * @since 1.3.0
     * @category Seq
     * @param {*} value The value to wrap.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36 },
     *   { 'user': 'fred',    'age': 40 },
     *   { 'user': 'pebbles', 'age': 1 }
     * ];
     *
     * var youngest = _
     *   .chain(users)
     *   .sortBy('age')
     *   .map(function(o) {
     *     return o.user + ' is ' + o.age;
     *   })
     *   .head()
     *   .value();
     * // => 'pebbles is 1'
     */
    function chain(value) {
      var result = lodash(value);
      result.__chain__ = true;
      return result;
    }

    /**
     * This method invokes `interceptor` and returns `value`. The interceptor
     * is invoked with one argument; (value). The purpose of this method is to
     * "tap into" a method chain sequence in order to modify intermediate results.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Seq
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {*} Returns `value`.
     * @example
     *
     * _([1, 2, 3])
     *  .tap(function(array) {
     *    // Mutate input array.
     *    array.pop();
     *  })
     *  .reverse()
     *  .value();
     * // => [2, 1]
     */
    function tap(value, interceptor) {
      interceptor(value);
      return value;
    }

    /**
     * This method is like `_.tap` except that it returns the result of `interceptor`.
     * The purpose of this method is to "pass thru" values replacing intermediate
     * results in a method chain sequence.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Seq
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {*} Returns the result of `interceptor`.
     * @example
     *
     * _('  abc  ')
     *  .chain()
     *  .trim()
     *  .thru(function(value) {
     *    return [value];
     *  })
     *  .value();
     * // => ['abc']
     */
    function thru(value, interceptor) {
      return interceptor(value);
    }

    /**
     * This method is the wrapper version of `_.at`.
     *
     * @name at
     * @memberOf _
     * @since 1.0.0
     * @category Seq
     * @param {...(string|string[])} [paths] The property paths to pick.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
     *
     * _(object).at(['a[0].b.c', 'a[1]']).value();
     * // => [3, 4]
     */
    var wrapperAt = flatRest(function(paths) {
      var length = paths.length,
          start = length ? paths[0] : 0,
          value = this.__wrapped__,
          interceptor = function(object) { return baseAt(object, paths); };

      if (length > 1 || this.__actions__.length ||
          !(value instanceof LazyWrapper) || !isIndex(start)) {
        return this.thru(interceptor);
      }
      value = value.slice(start, +start + (length ? 1 : 0));
      value.__actions__.push({
        'func': thru,
        'args': [interceptor],
        'thisArg': undefined
      });
      return new LodashWrapper(value, this.__chain__).thru(function(array) {
        if (length && !array.length) {
          array.push(undefined);
        }
        return array;
      });
    });

    /**
     * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
     *
     * @name chain
     * @memberOf _
     * @since 0.1.0
     * @category Seq
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * // A sequence without explicit chaining.
     * _(users).head();
     * // => { 'user': 'barney', 'age': 36 }
     *
     * // A sequence with explicit chaining.
     * _(users)
     *   .chain()
     *   .head()
     *   .pick('user')
     *   .value();
     * // => { 'user': 'barney' }
     */
    function wrapperChain() {
      return chain(this);
    }

    /**
     * Executes the chain sequence and returns the wrapped result.
     *
     * @name commit
     * @memberOf _
     * @since 3.2.0
     * @category Seq
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2];
     * var wrapped = _(array).push(3);
     *
     * console.log(array);
     * // => [1, 2]
     *
     * wrapped = wrapped.commit();
     * console.log(array);
     * // => [1, 2, 3]
     *
     * wrapped.last();
     * // => 3
     *
     * console.log(array);
     * // => [1, 2, 3]
     */
    function wrapperCommit() {
      return new LodashWrapper(this.value(), this.__chain__);
    }

    /**
     * Gets the next value on a wrapped object following the
     * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
     *
     * @name next
     * @memberOf _
     * @since 4.0.0
     * @category Seq
     * @returns {Object} Returns the next iterator value.
     * @example
     *
     * var wrapped = _([1, 2]);
     *
     * wrapped.next();
     * // => { 'done': false, 'value': 1 }
     *
     * wrapped.next();
     * // => { 'done': false, 'value': 2 }
     *
     * wrapped.next();
     * // => { 'done': true, 'value': undefined }
     */
    function wrapperNext() {
      if (this.__values__ === undefined) {
        this.__values__ = toArray(this.value());
      }
      var done = this.__index__ >= this.__values__.length,
          value = done ? undefined : this.__values__[this.__index__++];

      return { 'done': done, 'value': value };
    }

    /**
     * Enables the wrapper to be iterable.
     *
     * @name Symbol.iterator
     * @memberOf _
     * @since 4.0.0
     * @category Seq
     * @returns {Object} Returns the wrapper object.
     * @example
     *
     * var wrapped = _([1, 2]);
     *
     * wrapped[Symbol.iterator]() === wrapped;
     * // => true
     *
     * Array.from(wrapped);
     * // => [1, 2]
     */
    function wrapperToIterator() {
      return this;
    }

    /**
     * Creates a clone of the chain sequence planting `value` as the wrapped value.
     *
     * @name plant
     * @memberOf _
     * @since 3.2.0
     * @category Seq
     * @param {*} value The value to plant.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var wrapped = _([1, 2]).map(square);
     * var other = wrapped.plant([3, 4]);
     *
     * other.value();
     * // => [9, 16]
     *
     * wrapped.value();
     * // => [1, 4]
     */
    function wrapperPlant(value) {
      var result,
          parent = this;

      while (parent instanceof baseLodash) {
        var clone = wrapperClone(parent);
        clone.__index__ = 0;
        clone.__values__ = undefined;
        if (result) {
          previous.__wrapped__ = clone;
        } else {
          result = clone;
        }
        var previous = clone;
        parent = parent.__wrapped__;
      }
      previous.__wrapped__ = value;
      return result;
    }

    /**
     * This method is the wrapper version of `_.reverse`.
     *
     * **Note:** This method mutates the wrapped array.
     *
     * @name reverse
     * @memberOf _
     * @since 0.1.0
     * @category Seq
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _(array).reverse().value()
     * // => [3, 2, 1]
     *
     * console.log(array);
     * // => [3, 2, 1]
     */
    function wrapperReverse() {
      var value = this.__wrapped__;
      if (value instanceof LazyWrapper) {
        var wrapped = value;
        if (this.__actions__.length) {
          wrapped = new LazyWrapper(this);
        }
        wrapped = wrapped.reverse();
        wrapped.__actions__.push({
          'func': thru,
          'args': [reverse],
          'thisArg': undefined
        });
        return new LodashWrapper(wrapped, this.__chain__);
      }
      return this.thru(reverse);
    }

    /**
     * Executes the chain sequence to resolve the unwrapped value.
     *
     * @name value
     * @memberOf _
     * @since 0.1.0
     * @alias toJSON, valueOf
     * @category Seq
     * @returns {*} Returns the resolved unwrapped value.
     * @example
     *
     * _([1, 2, 3]).value();
     * // => [1, 2, 3]
     */
    function wrapperValue() {
      return baseWrapperValue(this.__wrapped__, this.__actions__);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` thru `iteratee`. The corresponding value of
     * each key is the number of times the key was returned by `iteratee`. The
     * iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 0.5.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.countBy([6.1, 4.2, 6.3], Math.floor);
     * // => { '4': 1, '6': 2 }
     *
     * // The `_.property` iteratee shorthand.
     * _.countBy(['one', 'two', 'three'], 'length');
     * // => { '3': 2, '5': 1 }
     */
    var countBy = createAggregator(function(result, value, key) {
      if (hasOwnProperty.call(result, key)) {
        ++result[key];
      } else {
        baseAssignValue(result, key, 1);
      }
    });

    /**
     * Checks if `predicate` returns truthy for **all** elements of `collection`.
     * Iteration is stopped once `predicate` returns falsey. The predicate is
     * invoked with three arguments: (value, index|key, collection).
     *
     * **Note:** This method returns `true` for
     * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
     * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
     * elements of empty collections.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`.
     * @example
     *
     * _.every([true, 1, null, 'yes'], Boolean);
     * // => false
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': false },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * // The `_.matches` iteratee shorthand.
     * _.every(users, { 'user': 'barney', 'active': false });
     * // => false
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.every(users, ['active', false]);
     * // => true
     *
     * // The `_.property` iteratee shorthand.
     * _.every(users, 'active');
     * // => false
     */
    function every(collection, predicate, guard) {
      var func = isArray(collection) ? arrayEvery : baseEvery;
      if (guard && isIterateeCall(collection, predicate, guard)) {
        predicate = undefined;
      }
      return func(collection, getIteratee(predicate, 3));
    }

    /**
     * Iterates over elements of `collection`, returning an array of all elements
     * `predicate` returns truthy for. The predicate is invoked with three
     * arguments: (value, index|key, collection).
     *
     * **Note:** Unlike `_.remove`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     * @see _.reject
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * _.filter(users, function(o) { return !o.active; });
     * // => objects for ['fred']
     *
     * // The `_.matches` iteratee shorthand.
     * _.filter(users, { 'age': 36, 'active': true });
     * // => objects for ['barney']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.filter(users, ['active', false]);
     * // => objects for ['fred']
     *
     * // The `_.property` iteratee shorthand.
     * _.filter(users, 'active');
     * // => objects for ['barney']
     */
    function filter(collection, predicate) {
      var func = isArray(collection) ? arrayFilter : baseFilter;
      return func(collection, getIteratee(predicate, 3));
    }

    /**
     * Iterates over elements of `collection`, returning the first element
     * `predicate` returns truthy for. The predicate is invoked with three
     * arguments: (value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36, 'active': true },
     *   { 'user': 'fred',    'age': 40, 'active': false },
     *   { 'user': 'pebbles', 'age': 1,  'active': true }
     * ];
     *
     * _.find(users, function(o) { return o.age < 40; });
     * // => object for 'barney'
     *
     * // The `_.matches` iteratee shorthand.
     * _.find(users, { 'age': 1, 'active': true });
     * // => object for 'pebbles'
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.find(users, ['active', false]);
     * // => object for 'fred'
     *
     * // The `_.property` iteratee shorthand.
     * _.find(users, 'active');
     * // => object for 'barney'
     */
    var find = createFind(findIndex);

    /**
     * This method is like `_.find` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=collection.length-1] The index to search from.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * _.findLast([1, 2, 3, 4], function(n) {
     *   return n % 2 == 1;
     * });
     * // => 3
     */
    var findLast = createFind(findLastIndex);

    /**
     * Creates a flattened array of values by running each element in `collection`
     * thru `iteratee` and flattening the mapped results. The iteratee is invoked
     * with three arguments: (value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * function duplicate(n) {
     *   return [n, n];
     * }
     *
     * _.flatMap([1, 2], duplicate);
     * // => [1, 1, 2, 2]
     */
    function flatMap(collection, iteratee) {
      return baseFlatten(map(collection, iteratee), 1);
    }

    /**
     * This method is like `_.flatMap` except that it recursively flattens the
     * mapped results.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * function duplicate(n) {
     *   return [[[n, n]]];
     * }
     *
     * _.flatMapDeep([1, 2], duplicate);
     * // => [1, 1, 2, 2]
     */
    function flatMapDeep(collection, iteratee) {
      return baseFlatten(map(collection, iteratee), INFINITY);
    }

    /**
     * This method is like `_.flatMap` except that it recursively flattens the
     * mapped results up to `depth` times.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {number} [depth=1] The maximum recursion depth.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * function duplicate(n) {
     *   return [[[n, n]]];
     * }
     *
     * _.flatMapDepth([1, 2], duplicate, 2);
     * // => [[1, 1], [2, 2]]
     */
    function flatMapDepth(collection, iteratee, depth) {
      depth = depth === undefined ? 1 : toInteger(depth);
      return baseFlatten(map(collection, iteratee), depth);
    }

    /**
     * Iterates over elements of `collection` and invokes `iteratee` for each element.
     * The iteratee is invoked with three arguments: (value, index|key, collection).
     * Iteratee functions may exit iteration early by explicitly returning `false`.
     *
     * **Note:** As with other "Collections" methods, objects with a "length"
     * property are iterated like arrays. To avoid this behavior use `_.forIn`
     * or `_.forOwn` for object iteration.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @alias each
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     * @see _.forEachRight
     * @example
     *
     * _.forEach([1, 2], function(value) {
     *   console.log(value);
     * });
     * // => Logs `1` then `2`.
     *
     * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
     */
    function forEach(collection, iteratee) {
      var func = isArray(collection) ? arrayEach : baseEach;
      return func(collection, getIteratee(iteratee, 3));
    }

    /**
     * This method is like `_.forEach` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @alias eachRight
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     * @see _.forEach
     * @example
     *
     * _.forEachRight([1, 2], function(value) {
     *   console.log(value);
     * });
     * // => Logs `2` then `1`.
     */
    function forEachRight(collection, iteratee) {
      var func = isArray(collection) ? arrayEachRight : baseEachRight;
      return func(collection, getIteratee(iteratee, 3));
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` thru `iteratee`. The order of grouped values
     * is determined by the order they occur in `collection`. The corresponding
     * value of each key is an array of elements responsible for generating the
     * key. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.groupBy([6.1, 4.2, 6.3], Math.floor);
     * // => { '4': [4.2], '6': [6.1, 6.3] }
     *
     * // The `_.property` iteratee shorthand.
     * _.groupBy(['one', 'two', 'three'], 'length');
     * // => { '3': ['one', 'two'], '5': ['three'] }
     */
    var groupBy = createAggregator(function(result, value, key) {
      if (hasOwnProperty.call(result, key)) {
        result[key].push(value);
      } else {
        baseAssignValue(result, key, [value]);
      }
    });

    /**
     * Checks if `value` is in `collection`. If `collection` is a string, it's
     * checked for a substring of `value`, otherwise
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * is used for equality comparisons. If `fromIndex` is negative, it's used as
     * the offset from the end of `collection`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object|string} collection The collection to inspect.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=0] The index to search from.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
     * @returns {boolean} Returns `true` if `value` is found, else `false`.
     * @example
     *
     * _.includes([1, 2, 3], 1);
     * // => true
     *
     * _.includes([1, 2, 3], 1, 2);
     * // => false
     *
     * _.includes({ 'a': 1, 'b': 2 }, 1);
     * // => true
     *
     * _.includes('abcd', 'bc');
     * // => true
     */
    function includes(collection, value, fromIndex, guard) {
      collection = isArrayLike(collection) ? collection : values(collection);
      fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;

      var length = collection.length;
      if (fromIndex < 0) {
        fromIndex = nativeMax(length + fromIndex, 0);
      }
      return isString(collection)
        ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
        : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
    }

    /**
     * Invokes the method at `path` of each element in `collection`, returning
     * an array of the results of each invoked method. Any additional arguments
     * are provided to each invoked method. If `path` is a function, it's invoked
     * for, and `this` bound to, each element in `collection`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Array|Function|string} path The path of the method to invoke or
     *  the function invoked per iteration.
     * @param {...*} [args] The arguments to invoke each method with.
     * @returns {Array} Returns the array of results.
     * @example
     *
     * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
     * // => [[1, 5, 7], [1, 2, 3]]
     *
     * _.invokeMap([123, 456], String.prototype.split, '');
     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    var invokeMap = baseRest(function(collection, path, args) {
      var index = -1,
          isFunc = typeof path == 'function',
          result = isArrayLike(collection) ? Array(collection.length) : [];

      baseEach(collection, function(value) {
        result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
      });
      return result;
    });

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` thru `iteratee`. The corresponding value of
     * each key is the last element responsible for generating the key. The
     * iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * var array = [
     *   { 'dir': 'left', 'code': 97 },
     *   { 'dir': 'right', 'code': 100 }
     * ];
     *
     * _.keyBy(array, function(o) {
     *   return String.fromCharCode(o.code);
     * });
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     *
     * _.keyBy(array, 'dir');
     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
     */
    var keyBy = createAggregator(function(result, value, key) {
      baseAssignValue(result, key, value);
    });

    /**
     * Creates an array of values by running each element in `collection` thru
     * `iteratee`. The iteratee is invoked with three arguments:
     * (value, index|key, collection).
     *
     * Many lodash methods are guarded to work as iteratees for methods like
     * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
     *
     * The guarded methods are:
     * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
     * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
     * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
     * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * _.map([4, 8], square);
     * // => [16, 64]
     *
     * _.map({ 'a': 4, 'b': 8 }, square);
     * // => [16, 64] (iteration order is not guaranteed)
     *
     * var users = [
     *   { 'user': 'barney' },
     *   { 'user': 'fred' }
     * ];
     *
     * // The `_.property` iteratee shorthand.
     * _.map(users, 'user');
     * // => ['barney', 'fred']
     */
    function map(collection, iteratee) {
      var func = isArray(collection) ? arrayMap : baseMap;
      return func(collection, getIteratee(iteratee, 3));
    }

    /**
     * This method is like `_.sortBy` except that it allows specifying the sort
     * orders of the iteratees to sort by. If `orders` is unspecified, all values
     * are sorted in ascending order. Otherwise, specify an order of "desc" for
     * descending or "asc" for ascending sort order of corresponding values.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
     *  The iteratees to sort by.
     * @param {string[]} [orders] The sort orders of `iteratees`.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * var users = [
     *   { 'user': 'fred',   'age': 48 },
     *   { 'user': 'barney', 'age': 34 },
     *   { 'user': 'fred',   'age': 40 },
     *   { 'user': 'barney', 'age': 36 }
     * ];
     *
     * // Sort by `user` in ascending order and by `age` in descending order.
     * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
     */
    function orderBy(collection, iteratees, orders, guard) {
      if (collection == null) {
        return [];
      }
      if (!isArray(iteratees)) {
        iteratees = iteratees == null ? [] : [iteratees];
      }
      orders = guard ? undefined : orders;
      if (!isArray(orders)) {
        orders = orders == null ? [] : [orders];
      }
      return baseOrderBy(collection, iteratees, orders);
    }

    /**
     * Creates an array of elements split into two groups, the first of which
     * contains elements `predicate` returns truthy for, the second of which
     * contains elements `predicate` returns falsey for. The predicate is
     * invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the array of grouped elements.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36, 'active': false },
     *   { 'user': 'fred',    'age': 40, 'active': true },
     *   { 'user': 'pebbles', 'age': 1,  'active': false }
     * ];
     *
     * _.partition(users, function(o) { return o.active; });
     * // => objects for [['fred'], ['barney', 'pebbles']]
     *
     * // The `_.matches` iteratee shorthand.
     * _.partition(users, { 'age': 1, 'active': false });
     * // => objects for [['pebbles'], ['barney', 'fred']]
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.partition(users, ['active', false]);
     * // => objects for [['barney', 'pebbles'], ['fred']]
     *
     * // The `_.property` iteratee shorthand.
     * _.partition(users, 'active');
     * // => objects for [['fred'], ['barney', 'pebbles']]
     */
    var partition = createAggregator(function(result, value, key) {
      result[key ? 0 : 1].push(value);
    }, function() { return [[], []]; });

    /**
     * Reduces `collection` to a value which is the accumulated result of running
     * each element in `collection` thru `iteratee`, where each successive
     * invocation is supplied the return value of the previous. If `accumulator`
     * is not given, the first element of `collection` is used as the initial
     * value. The iteratee is invoked with four arguments:
     * (accumulator, value, index|key, collection).
     *
     * Many lodash methods are guarded to work as iteratees for methods like
     * `_.reduce`, `_.reduceRight`, and `_.transform`.
     *
     * The guarded methods are:
     * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
     * and `sortBy`
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @returns {*} Returns the accumulated value.
     * @see _.reduceRight
     * @example
     *
     * _.reduce([1, 2], function(sum, n) {
     *   return sum + n;
     * }, 0);
     * // => 3
     *
     * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
     *   (result[value] || (result[value] = [])).push(key);
     *   return result;
     * }, {});
     * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
     */
    function reduce(collection, iteratee, accumulator) {
      var func = isArray(collection) ? arrayReduce : baseReduce,
          initAccum = arguments.length < 3;

      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
    }

    /**
     * This method is like `_.reduce` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @returns {*} Returns the accumulated value.
     * @see _.reduce
     * @example
     *
     * var array = [[0, 1], [2, 3], [4, 5]];
     *
     * _.reduceRight(array, function(flattened, other) {
     *   return flattened.concat(other);
     * }, []);
     * // => [4, 5, 2, 3, 0, 1]
     */
    function reduceRight(collection, iteratee, accumulator) {
      var func = isArray(collection) ? arrayReduceRight : baseReduce,
          initAccum = arguments.length < 3;

      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
    }

    /**
     * The opposite of `_.filter`; this method returns the elements of `collection`
     * that `predicate` does **not** return truthy for.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     * @see _.filter
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': false },
     *   { 'user': 'fred',   'age': 40, 'active': true }
     * ];
     *
     * _.reject(users, function(o) { return !o.active; });
     * // => objects for ['fred']
     *
     * // The `_.matches` iteratee shorthand.
     * _.reject(users, { 'age': 40, 'active': true });
     * // => objects for ['barney']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.reject(users, ['active', false]);
     * // => objects for ['fred']
     *
     * // The `_.property` iteratee shorthand.
     * _.reject(users, 'active');
     * // => objects for ['barney']
     */
    function reject(collection, predicate) {
      var func = isArray(collection) ? arrayFilter : baseFilter;
      return func(collection, negate(getIteratee(predicate, 3)));
    }

    /**
     * Gets a random element from `collection`.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to sample.
     * @returns {*} Returns the random element.
     * @example
     *
     * _.sample([1, 2, 3, 4]);
     * // => 2
     */
    function sample(collection) {
      var func = isArray(collection) ? arraySample : baseSample;
      return func(collection);
    }

    /**
     * Gets `n` random elements at unique keys from `collection` up to the
     * size of `collection`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to sample.
     * @param {number} [n=1] The number of elements to sample.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the random elements.
     * @example
     *
     * _.sampleSize([1, 2, 3], 2);
     * // => [3, 1]
     *
     * _.sampleSize([1, 2, 3], 4);
     * // => [2, 3, 1]
     */
    function sampleSize(collection, n, guard) {
      if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
        n = 1;
      } else {
        n = toInteger(n);
      }
      var func = isArray(collection) ? arraySampleSize : baseSampleSize;
      return func(collection, n);
    }

    /**
     * Creates an array of shuffled values, using a version of the
     * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to shuffle.
     * @returns {Array} Returns the new shuffled array.
     * @example
     *
     * _.shuffle([1, 2, 3, 4]);
     * // => [4, 1, 3, 2]
     */
    function shuffle(collection) {
      var func = isArray(collection) ? arrayShuffle : baseShuffle;
      return func(collection);
    }

    /**
     * Gets the size of `collection` by returning its length for array-like
     * values or the number of own enumerable string keyed properties for objects.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object|string} collection The collection to inspect.
     * @returns {number} Returns the collection size.
     * @example
     *
     * _.size([1, 2, 3]);
     * // => 3
     *
     * _.size({ 'a': 1, 'b': 2 });
     * // => 2
     *
     * _.size('pebbles');
     * // => 7
     */
    function size(collection) {
      if (collection == null) {
        return 0;
      }
      if (isArrayLike(collection)) {
        return isString(collection) ? stringSize(collection) : collection.length;
      }
      var tag = getTag(collection);
      if (tag == mapTag || tag == setTag) {
        return collection.size;
      }
      return baseKeys(collection).length;
    }

    /**
     * Checks if `predicate` returns truthy for **any** element of `collection`.
     * Iteration is stopped once `predicate` returns truthy. The predicate is
     * invoked with three arguments: (value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     * @example
     *
     * _.some([null, 0, 'yes', false], Boolean);
     * // => true
     *
     * var users = [
     *   { 'user': 'barney', 'active': true },
     *   { 'user': 'fred',   'active': false }
     * ];
     *
     * // The `_.matches` iteratee shorthand.
     * _.some(users, { 'user': 'barney', 'active': false });
     * // => false
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.some(users, ['active', false]);
     * // => true
     *
     * // The `_.property` iteratee shorthand.
     * _.some(users, 'active');
     * // => true
     */
    function some(collection, predicate, guard) {
      var func = isArray(collection) ? arraySome : baseSome;
      if (guard && isIterateeCall(collection, predicate, guard)) {
        predicate = undefined;
      }
      return func(collection, getIteratee(predicate, 3));
    }

    /**
     * Creates an array of elements, sorted in ascending order by the results of
     * running each element in a collection thru each iteratee. This method
     * performs a stable sort, that is, it preserves the original sort order of
     * equal elements. The iteratees are invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {...(Function|Function[])} [iteratees=[_.identity]]
     *  The iteratees to sort by.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * var users = [
     *   { 'user': 'fred',   'age': 48 },
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 },
     *   { 'user': 'barney', 'age': 34 }
     * ];
     *
     * _.sortBy(users, [function(o) { return o.user; }]);
     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
     *
     * _.sortBy(users, ['user', 'age']);
     * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
     */
    var sortBy = baseRest(function(collection, iteratees) {
      if (collection == null) {
        return [];
      }
      var length = iteratees.length;
      if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
        iteratees = [];
      } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
        iteratees = [iteratees[0]];
      }
      return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
    });

    /*------------------------------------------------------------------------*/

    /**
     * Gets the timestamp of the number of milliseconds that have elapsed since
     * the Unix epoch (1 January 1970 00:00:00 UTC).
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Date
     * @returns {number} Returns the timestamp.
     * @example
     *
     * _.defer(function(stamp) {
     *   console.log(_.now() - stamp);
     * }, _.now());
     * // => Logs the number of milliseconds it took for the deferred invocation.
     */
    var now = ctxNow || function() {
      return root.Date.now();
    };

    /*------------------------------------------------------------------------*/

    /**
     * The opposite of `_.before`; this method creates a function that invokes
     * `func` once it's called `n` or more times.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {number} n The number of calls before `func` is invoked.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var saves = ['profile', 'settings'];
     *
     * var done = _.after(saves.length, function() {
     *   console.log('done saving!');
     * });
     *
     * _.forEach(saves, function(type) {
     *   asyncSave({ 'type': type, 'complete': done });
     * });
     * // => Logs 'done saving!' after the two async saves have completed.
     */
    function after(n, func) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      n = toInteger(n);
      return function() {
        if (--n < 1) {
          return func.apply(this, arguments);
        }
      };
    }

    /**
     * Creates a function that invokes `func`, with up to `n` arguments,
     * ignoring any additional arguments.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} func The function to cap arguments for.
     * @param {number} [n=func.length] The arity cap.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the new capped function.
     * @example
     *
     * _.map(['6', '8', '10'], _.ary(parseInt, 1));
     * // => [6, 8, 10]
     */
    function ary(func, n, guard) {
      n = guard ? undefined : n;
      n = (func && n == null) ? func.length : n;
      return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
    }

    /**
     * Creates a function that invokes `func`, with the `this` binding and arguments
     * of the created function, while it's called less than `n` times. Subsequent
     * calls to the created function return the result of the last `func` invocation.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {number} n The number of calls at which `func` is no longer invoked.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * jQuery(element).on('click', _.before(5, addContactToList));
     * // => Allows adding up to 4 contacts to the list.
     */
    function before(n, func) {
      var result;
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      n = toInteger(n);
      return function() {
        if (--n > 0) {
          result = func.apply(this, arguments);
        }
        if (n <= 1) {
          func = undefined;
        }
        return result;
      };
    }

    /**
     * Creates a function that invokes `func` with the `this` binding of `thisArg`
     * and `partials` prepended to the arguments it receives.
     *
     * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
     * may be used as a placeholder for partially applied arguments.
     *
     * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
     * property of bound functions.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to bind.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * function greet(greeting, punctuation) {
     *   return greeting + ' ' + this.user + punctuation;
     * }
     *
     * var object = { 'user': 'fred' };
     *
     * var bound = _.bind(greet, object, 'hi');
     * bound('!');
     * // => 'hi fred!'
     *
     * // Bound with placeholders.
     * var bound = _.bind(greet, object, _, '!');
     * bound('hi');
     * // => 'hi fred!'
     */
    var bind = baseRest(function(func, thisArg, partials) {
      var bitmask = WRAP_BIND_FLAG;
      if (partials.length) {
        var holders = replaceHolders(partials, getHolder(bind));
        bitmask |= WRAP_PARTIAL_FLAG;
      }
      return createWrap(func, bitmask, thisArg, partials, holders);
    });

    /**
     * Creates a function that invokes the method at `object[key]` with `partials`
     * prepended to the arguments it receives.
     *
     * This method differs from `_.bind` by allowing bound functions to reference
     * methods that may be redefined or don't yet exist. See
     * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
     * for more details.
     *
     * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * @static
     * @memberOf _
     * @since 0.10.0
     * @category Function
     * @param {Object} object The object to invoke the method on.
     * @param {string} key The key of the method.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var object = {
     *   'user': 'fred',
     *   'greet': function(greeting, punctuation) {
     *     return greeting + ' ' + this.user + punctuation;
     *   }
     * };
     *
     * var bound = _.bindKey(object, 'greet', 'hi');
     * bound('!');
     * // => 'hi fred!'
     *
     * object.greet = function(greeting, punctuation) {
     *   return greeting + 'ya ' + this.user + punctuation;
     * };
     *
     * bound('!');
     * // => 'hiya fred!'
     *
     * // Bound with placeholders.
     * var bound = _.bindKey(object, 'greet', _, '!');
     * bound('hi');
     * // => 'hiya fred!'
     */
    var bindKey = baseRest(function(object, key, partials) {
      var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
      if (partials.length) {
        var holders = replaceHolders(partials, getHolder(bindKey));
        bitmask |= WRAP_PARTIAL_FLAG;
      }
      return createWrap(key, bitmask, object, partials, holders);
    });

    /**
     * Creates a function that accepts arguments of `func` and either invokes
     * `func` returning its result, if at least `arity` number of arguments have
     * been provided, or returns a function that accepts the remaining `func`
     * arguments, and so on. The arity of `func` may be specified if `func.length`
     * is not sufficient.
     *
     * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
     * may be used as a placeholder for provided arguments.
     *
     * **Note:** This method doesn't set the "length" property of curried functions.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Function
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var abc = function(a, b, c) {
     *   return [a, b, c];
     * };
     *
     * var curried = _.curry(abc);
     *
     * curried(1)(2)(3);
     * // => [1, 2, 3]
     *
     * curried(1, 2)(3);
     * // => [1, 2, 3]
     *
     * curried(1, 2, 3);
     * // => [1, 2, 3]
     *
     * // Curried with placeholders.
     * curried(1)(_, 3)(2);
     * // => [1, 2, 3]
     */
    function curry(func, arity, guard) {
      arity = guard ? undefined : arity;
      var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
      result.placeholder = curry.placeholder;
      return result;
    }

    /**
     * This method is like `_.curry` except that arguments are applied to `func`
     * in the manner of `_.partialRight` instead of `_.partial`.
     *
     * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for provided arguments.
     *
     * **Note:** This method doesn't set the "length" property of curried functions.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var abc = function(a, b, c) {
     *   return [a, b, c];
     * };
     *
     * var curried = _.curryRight(abc);
     *
     * curried(3)(2)(1);
     * // => [1, 2, 3]
     *
     * curried(2, 3)(1);
     * // => [1, 2, 3]
     *
     * curried(1, 2, 3);
     * // => [1, 2, 3]
     *
     * // Curried with placeholders.
     * curried(3)(1, _)(2);
     * // => [1, 2, 3]
     */
    function curryRight(func, arity, guard) {
      arity = guard ? undefined : arity;
      var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
      result.placeholder = curryRight.placeholder;
      return result;
    }

    /**
     * Creates a debounced function that delays invoking `func` until after `wait`
     * milliseconds have elapsed since the last time the debounced function was
     * invoked. The debounced function comes with a `cancel` method to cancel
     * delayed `func` invocations and a `flush` method to immediately invoke them.
     * Provide `options` to indicate whether `func` should be invoked on the
     * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
     * with the last arguments provided to the debounced function. Subsequent
     * calls to the debounced function return the result of the last `func`
     * invocation.
     *
     * **Note:** If `leading` and `trailing` options are `true`, `func` is
     * invoked on the trailing edge of the timeout only if the debounced function
     * is invoked more than once during the `wait` timeout.
     *
     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
     * until to the next tick, similar to `setTimeout` with a timeout of `0`.
     *
     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
     * for details over the differences between `_.debounce` and `_.throttle`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to debounce.
     * @param {number} [wait=0] The number of milliseconds to delay.
     * @param {Object} [options={}] The options object.
     * @param {boolean} [options.leading=false]
     *  Specify invoking on the leading edge of the timeout.
     * @param {number} [options.maxWait]
     *  The maximum time `func` is allowed to be delayed before it's invoked.
     * @param {boolean} [options.trailing=true]
     *  Specify invoking on the trailing edge of the timeout.
     * @returns {Function} Returns the new debounced function.
     * @example
     *
     * // Avoid costly calculations while the window size is in flux.
     * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
     *
     * // Invoke `sendMail` when clicked, debouncing subsequent calls.
     * jQuery(element).on('click', _.debounce(sendMail, 300, {
     *   'leading': true,
     *   'trailing': false
     * }));
     *
     * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
     * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
     * var source = new EventSource('/stream');
     * jQuery(source).on('message', debounced);
     *
     * // Cancel the trailing debounced invocation.
     * jQuery(window).on('popstate', debounced.cancel);
     */
    function debounce(func, wait, options) {
      var lastArgs,
          lastThis,
          maxWait,
          result,
          timerId,
          lastCallTime,
          lastInvokeTime = 0,
          leading = false,
          maxing = false,
          trailing = true;

      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      wait = toNumber(wait) || 0;
      if (isObject(options)) {
        leading = !!options.leading;
        maxing = 'maxWait' in options;
        maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
      }

      function invokeFunc(time) {
        var args = lastArgs,
            thisArg = lastThis;

        lastArgs = lastThis = undefined;
        lastInvokeTime = time;
        result = func.apply(thisArg, args);
        return result;
      }

      function leadingEdge(time) {
        // Reset any `maxWait` timer.
        lastInvokeTime = time;
        // Start the timer for the trailing edge.
        timerId = setTimeout(timerExpired, wait);
        // Invoke the leading edge.
        return leading ? invokeFunc(time) : result;
      }

      function remainingWait(time) {
        var timeSinceLastCall = time - lastCallTime,
            timeSinceLastInvoke = time - lastInvokeTime,
            timeWaiting = wait - timeSinceLastCall;

        return maxing
          ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
          : timeWaiting;
      }

      function shouldInvoke(time) {
        var timeSinceLastCall = time - lastCallTime,
            timeSinceLastInvoke = time - lastInvokeTime;

        // Either this is the first call, activity has stopped and we're at the
        // trailing edge, the system time has gone backwards and we're treating
        // it as the trailing edge, or we've hit the `maxWait` limit.
        return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
          (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
      }

      function timerExpired() {
        var time = now();
        if (shouldInvoke(time)) {
          return trailingEdge(time);
        }
        // Restart the timer.
        timerId = setTimeout(timerExpired, remainingWait(time));
      }

      function trailingEdge(time) {
        timerId = undefined;

        // Only invoke if we have `lastArgs` which means `func` has been
        // debounced at least once.
        if (trailing && lastArgs) {
          return invokeFunc(time);
        }
        lastArgs = lastThis = undefined;
        return result;
      }

      function cancel() {
        if (timerId !== undefined) {
          clearTimeout(timerId);
        }
        lastInvokeTime = 0;
        lastArgs = lastCallTime = lastThis = timerId = undefined;
      }

      function flush() {
        return timerId === undefined ? result : trailingEdge(now());
      }

      function debounced() {
        var time = now(),
            isInvoking = shouldInvoke(time);

        lastArgs = arguments;
        lastThis = this;
        lastCallTime = time;

        if (isInvoking) {
          if (timerId === undefined) {
            return leadingEdge(lastCallTime);
          }
          if (maxing) {
            // Handle invocations in a tight loop.
            clearTimeout(timerId);
            timerId = setTimeout(timerExpired, wait);
            return invokeFunc(lastCallTime);
          }
        }
        if (timerId === undefined) {
          timerId = setTimeout(timerExpired, wait);
        }
        return result;
      }
      debounced.cancel = cancel;
      debounced.flush = flush;
      return debounced;
    }

    /**
     * Defers invoking the `func` until the current call stack has cleared. Any
     * additional arguments are provided to `func` when it's invoked.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to defer.
     * @param {...*} [args] The arguments to invoke `func` with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.defer(function(text) {
     *   console.log(text);
     * }, 'deferred');
     * // => Logs 'deferred' after one millisecond.
     */
    var defer = baseRest(function(func, args) {
      return baseDelay(func, 1, args);
    });

    /**
     * Invokes `func` after `wait` milliseconds. Any additional arguments are
     * provided to `func` when it's invoked.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @param {...*} [args] The arguments to invoke `func` with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.delay(function(text) {
     *   console.log(text);
     * }, 1000, 'later');
     * // => Logs 'later' after one second.
     */
    var delay = baseRest(function(func, wait, args) {
      return baseDelay(func, toNumber(wait) || 0, args);
    });

    /**
     * Creates a function that invokes `func` with arguments reversed.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Function
     * @param {Function} func The function to flip arguments for.
     * @returns {Function} Returns the new flipped function.
     * @example
     *
     * var flipped = _.flip(function() {
     *   return _.toArray(arguments);
     * });
     *
     * flipped('a', 'b', 'c', 'd');
     * // => ['d', 'c', 'b', 'a']
     */
    function flip(func) {
      return createWrap(func, WRAP_FLIP_FLAG);
    }

    /**
     * Creates a function that memoizes the result of `func`. If `resolver` is
     * provided, it determines the cache key for storing the result based on the
     * arguments provided to the memoized function. By default, the first argument
     * provided to the memoized function is used as the map cache key. The `func`
     * is invoked with the `this` binding of the memoized function.
     *
     * **Note:** The cache is exposed as the `cache` property on the memoized
     * function. Its creation may be customized by replacing the `_.memoize.Cache`
     * constructor with one whose instances implement the
     * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
     * method interface of `clear`, `delete`, `get`, `has`, and `set`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to have its output memoized.
     * @param {Function} [resolver] The function to resolve the cache key.
     * @returns {Function} Returns the new memoized function.
     * @example
     *
     * var object = { 'a': 1, 'b': 2 };
     * var other = { 'c': 3, 'd': 4 };
     *
     * var values = _.memoize(_.values);
     * values(object);
     * // => [1, 2]
     *
     * values(other);
     * // => [3, 4]
     *
     * object.a = 2;
     * values(object);
     * // => [1, 2]
     *
     * // Modify the result cache.
     * values.cache.set(object, ['a', 'b']);
     * values(object);
     * // => ['a', 'b']
     *
     * // Replace `_.memoize.Cache`.
     * _.memoize.Cache = WeakMap;
     */
    function memoize(func, resolver) {
      if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var memoized = function() {
        var args = arguments,
            key = resolver ? resolver.apply(this, args) : args[0],
            cache = memoized.cache;

        if (cache.has(key)) {
          return cache.get(key);
        }
        var result = func.apply(this, args);
        memoized.cache = cache.set(key, result) || cache;
        return result;
      };
      memoized.cache = new (memoize.Cache || MapCache);
      return memoized;
    }

    // Expose `MapCache`.
    memoize.Cache = MapCache;

    /**
     * Creates a function that negates the result of the predicate `func`. The
     * `func` predicate is invoked with the `this` binding and arguments of the
     * created function.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} predicate The predicate to negate.
     * @returns {Function} Returns the new negated function.
     * @example
     *
     * function isEven(n) {
     *   return n % 2 == 0;
     * }
     *
     * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
     * // => [1, 3, 5]
     */
    function negate(predicate) {
      if (typeof predicate != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return function() {
        var args = arguments;
        switch (args.length) {
          case 0: return !predicate.call(this);
          case 1: return !predicate.call(this, args[0]);
          case 2: return !predicate.call(this, args[0], args[1]);
          case 3: return !predicate.call(this, args[0], args[1], args[2]);
        }
        return !predicate.apply(this, args);
      };
    }

    /**
     * Creates a function that is restricted to invoking `func` once. Repeat calls
     * to the function return the value of the first invocation. The `func` is
     * invoked with the `this` binding and arguments of the created function.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var initialize = _.once(createApplication);
     * initialize();
     * initialize();
     * // => `createApplication` is invoked once
     */
    function once(func) {
      return before(2, func);
    }

    /**
     * Creates a function that invokes `func` with its arguments transformed.
     *
     * @static
     * @since 4.0.0
     * @memberOf _
     * @category Function
     * @param {Function} func The function to wrap.
     * @param {...(Function|Function[])} [transforms=[_.identity]]
     *  The argument transforms.
     * @returns {Function} Returns the new function.
     * @example
     *
     * function doubled(n) {
     *   return n * 2;
     * }
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var func = _.overArgs(function(x, y) {
     *   return [x, y];
     * }, [square, doubled]);
     *
     * func(9, 3);
     * // => [81, 6]
     *
     * func(10, 5);
     * // => [100, 10]
     */
    var overArgs = castRest(function(func, transforms) {
      transforms = (transforms.length == 1 && isArray(transforms[0]))
        ? arrayMap(transforms[0], baseUnary(getIteratee()))
        : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));

      var funcsLength = transforms.length;
      return baseRest(function(args) {
        var index = -1,
            length = nativeMin(args.length, funcsLength);

        while (++index < length) {
          args[index] = transforms[index].call(this, args[index]);
        }
        return apply(func, this, args);
      });
    });

    /**
     * Creates a function that invokes `func` with `partials` prepended to the
     * arguments it receives. This method is like `_.bind` except it does **not**
     * alter the `this` binding.
     *
     * The `_.partial.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * **Note:** This method doesn't set the "length" property of partially
     * applied functions.
     *
     * @static
     * @memberOf _
     * @since 0.2.0
     * @category Function
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * function greet(greeting, name) {
     *   return greeting + ' ' + name;
     * }
     *
     * var sayHelloTo = _.partial(greet, 'hello');
     * sayHelloTo('fred');
     * // => 'hello fred'
     *
     * // Partially applied with placeholders.
     * var greetFred = _.partial(greet, _, 'fred');
     * greetFred('hi');
     * // => 'hi fred'
     */
    var partial = baseRest(function(func, partials) {
      var holders = replaceHolders(partials, getHolder(partial));
      return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
    });

    /**
     * This method is like `_.partial` except that partially applied arguments
     * are appended to the arguments it receives.
     *
     * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * **Note:** This method doesn't set the "length" property of partially
     * applied functions.
     *
     * @static
     * @memberOf _
     * @since 1.0.0
     * @category Function
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * function greet(greeting, name) {
     *   return greeting + ' ' + name;
     * }
     *
     * var greetFred = _.partialRight(greet, 'fred');
     * greetFred('hi');
     * // => 'hi fred'
     *
     * // Partially applied with placeholders.
     * var sayHelloTo = _.partialRight(greet, 'hello', _);
     * sayHelloTo('fred');
     * // => 'hello fred'
     */
    var partialRight = baseRest(function(func, partials) {
      var holders = replaceHolders(partials, getHolder(partialRight));
      return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
    });

    /**
     * Creates a function that invokes `func` with arguments arranged according
     * to the specified `indexes` where the argument value at the first index is
     * provided as the first argument, the argument value at the second index is
     * provided as the second argument, and so on.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} func The function to rearrange arguments for.
     * @param {...(number|number[])} indexes The arranged argument indexes.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var rearged = _.rearg(function(a, b, c) {
     *   return [a, b, c];
     * }, [2, 0, 1]);
     *
     * rearged('b', 'c', 'a')
     * // => ['a', 'b', 'c']
     */
    var rearg = flatRest(function(func, indexes) {
      return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
    });

    /**
     * Creates a function that invokes `func` with the `this` binding of the
     * created function and arguments from `start` and beyond provided as
     * an array.
     *
     * **Note:** This method is based on the
     * [rest parameter](https://mdn.io/rest_parameters).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Function
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var say = _.rest(function(what, names) {
     *   return what + ' ' + _.initial(names).join(', ') +
     *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
     * });
     *
     * say('hello', 'fred', 'barney', 'pebbles');
     * // => 'hello fred, barney, & pebbles'
     */
    function rest(func, start) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      start = start === undefined ? start : toInteger(start);
      return baseRest(func, start);
    }

    /**
     * Creates a function that invokes `func` with the `this` binding of the
     * create function and an array of arguments much like
     * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
     *
     * **Note:** This method is based on the
     * [spread operator](https://mdn.io/spread_operator).
     *
     * @static
     * @memberOf _
     * @since 3.2.0
     * @category Function
     * @param {Function} func The function to spread arguments over.
     * @param {number} [start=0] The start position of the spread.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var say = _.spread(function(who, what) {
     *   return who + ' says ' + what;
     * });
     *
     * say(['fred', 'hello']);
     * // => 'fred says hello'
     *
     * var numbers = Promise.all([
     *   Promise.resolve(40),
     *   Promise.resolve(36)
     * ]);
     *
     * numbers.then(_.spread(function(x, y) {
     *   return x + y;
     * }));
     * // => a Promise of 76
     */
    function spread(func, start) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      start = start == null ? 0 : nativeMax(toInteger(start), 0);
      return baseRest(function(args) {
        var array = args[start],
            otherArgs = castSlice(args, 0, start);

        if (array) {
          arrayPush(otherArgs, array);
        }
        return apply(func, this, otherArgs);
      });
    }

    /**
     * Creates a throttled function that only invokes `func` at most once per
     * every `wait` milliseconds. The throttled function comes with a `cancel`
     * method to cancel delayed `func` invocations and a `flush` method to
     * immediately invoke them. Provide `options` to indicate whether `func`
     * should be invoked on the leading and/or trailing edge of the `wait`
     * timeout. The `func` is invoked with the last arguments provided to the
     * throttled function. Subsequent calls to the throttled function return the
     * result of the last `func` invocation.
     *
     * **Note:** If `leading` and `trailing` options are `true`, `func` is
     * invoked on the trailing edge of the timeout only if the throttled function
     * is invoked more than once during the `wait` timeout.
     *
     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
     * until to the next tick, similar to `setTimeout` with a timeout of `0`.
     *
     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
     * for details over the differences between `_.throttle` and `_.debounce`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to throttle.
     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
     * @param {Object} [options={}] The options object.
     * @param {boolean} [options.leading=true]
     *  Specify invoking on the leading edge of the timeout.
     * @param {boolean} [options.trailing=true]
     *  Specify invoking on the trailing edge of the timeout.
     * @returns {Function} Returns the new throttled function.
     * @example
     *
     * // Avoid excessively updating the position while scrolling.
     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
     *
     * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
     * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
     * jQuery(element).on('click', throttled);
     *
     * // Cancel the trailing throttled invocation.
     * jQuery(window).on('popstate', throttled.cancel);
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      if (isObject(options)) {
        leading = 'leading' in options ? !!options.leading : leading;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
      }
      return debounce(func, wait, {
        'leading': leading,
        'maxWait': wait,
        'trailing': trailing
      });
    }

    /**
     * Creates a function that accepts up to one argument, ignoring any
     * additional arguments.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Function
     * @param {Function} func The function to cap arguments for.
     * @returns {Function} Returns the new capped function.
     * @example
     *
     * _.map(['6', '8', '10'], _.unary(parseInt));
     * // => [6, 8, 10]
     */
    function unary(func) {
      return ary(func, 1);
    }

    /**
     * Creates a function that provides `value` to `wrapper` as its first
     * argument. Any additional arguments provided to the function are appended
     * to those provided to the `wrapper`. The wrapper is invoked with the `this`
     * binding of the created function.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {*} value The value to wrap.
     * @param {Function} [wrapper=identity] The wrapper function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var p = _.wrap(_.escape, function(func, text) {
     *   return '<p>' + func(text) + '</p>';
     * });
     *
     * p('fred, barney, & pebbles');
     * // => '<p>fred, barney, &amp; pebbles</p>'
     */
    function wrap(value, wrapper) {
      return partial(castFunction(wrapper), value);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Casts `value` as an array if it's not one.
     *
     * @static
     * @memberOf _
     * @since 4.4.0
     * @category Lang
     * @param {*} value The value to inspect.
     * @returns {Array} Returns the cast array.
     * @example
     *
     * _.castArray(1);
     * // => [1]
     *
     * _.castArray({ 'a': 1 });
     * // => [{ 'a': 1 }]
     *
     * _.castArray('abc');
     * // => ['abc']
     *
     * _.castArray(null);
     * // => [null]
     *
     * _.castArray(undefined);
     * // => [undefined]
     *
     * _.castArray();
     * // => []
     *
     * var array = [1, 2, 3];
     * console.log(_.castArray(array) === array);
     * // => true
     */
    function castArray() {
      if (!arguments.length) {
        return [];
      }
      var value = arguments[0];
      return isArray(value) ? value : [value];
    }

    /**
     * Creates a shallow clone of `value`.
     *
     * **Note:** This method is loosely based on the
     * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
     * and supports cloning arrays, array buffers, booleans, date objects, maps,
     * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
     * arrays. The own enumerable properties of `arguments` objects are cloned
     * as plain objects. An empty object is returned for uncloneable values such
     * as error objects, functions, DOM nodes, and WeakMaps.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to clone.
     * @returns {*} Returns the cloned value.
     * @see _.cloneDeep
     * @example
     *
     * var objects = [{ 'a': 1 }, { 'b': 2 }];
     *
     * var shallow = _.clone(objects);
     * console.log(shallow[0] === objects[0]);
     * // => true
     */
    function clone(value) {
      return baseClone(value, CLONE_SYMBOLS_FLAG);
    }

    /**
     * This method is like `_.clone` except that it accepts `customizer` which
     * is invoked to produce the cloned value. If `customizer` returns `undefined`,
     * cloning is handled by the method instead. The `customizer` is invoked with
     * up to four arguments; (value [, index|key, object, stack]).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to clone.
     * @param {Function} [customizer] The function to customize cloning.
     * @returns {*} Returns the cloned value.
     * @see _.cloneDeepWith
     * @example
     *
     * function customizer(value) {
     *   if (_.isElement(value)) {
     *     return value.cloneNode(false);
     *   }
     * }
     *
     * var el = _.cloneWith(document.body, customizer);
     *
     * console.log(el === document.body);
     * // => false
     * console.log(el.nodeName);
     * // => 'BODY'
     * console.log(el.childNodes.length);
     * // => 0
     */
    function cloneWith(value, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
    }

    /**
     * This method is like `_.clone` except that it recursively clones `value`.
     *
     * @static
     * @memberOf _
     * @since 1.0.0
     * @category Lang
     * @param {*} value The value to recursively clone.
     * @returns {*} Returns the deep cloned value.
     * @see _.clone
     * @example
     *
     * var objects = [{ 'a': 1 }, { 'b': 2 }];
     *
     * var deep = _.cloneDeep(objects);
     * console.log(deep[0] === objects[0]);
     * // => false
     */
    function cloneDeep(value) {
      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
    }

    /**
     * This method is like `_.cloneWith` except that it recursively clones `value`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to recursively clone.
     * @param {Function} [customizer] The function to customize cloning.
     * @returns {*} Returns the deep cloned value.
     * @see _.cloneWith
     * @example
     *
     * function customizer(value) {
     *   if (_.isElement(value)) {
     *     return value.cloneNode(true);
     *   }
     * }
     *
     * var el = _.cloneDeepWith(document.body, customizer);
     *
     * console.log(el === document.body);
     * // => false
     * console.log(el.nodeName);
     * // => 'BODY'
     * console.log(el.childNodes.length);
     * // => 20
     */
    function cloneDeepWith(value, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
    }

    /**
     * Checks if `object` conforms to `source` by invoking the predicate
     * properties of `source` with the corresponding property values of `object`.
     *
     * **Note:** This method is equivalent to `_.conforms` when `source` is
     * partially applied.
     *
     * @static
     * @memberOf _
     * @since 4.14.0
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property predicates to conform to.
     * @returns {boolean} Returns `true` if `object` conforms, else `false`.
     * @example
     *
     * var object = { 'a': 1, 'b': 2 };
     *
     * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
     * // => true
     *
     * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
     * // => false
     */
    function conformsTo(object, source) {
      return source == null || baseConformsTo(object, source, keys(source));
    }

    /**
     * Performs a
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * comparison between two values to determine if they are equivalent.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'a': 1 };
     * var other = { 'a': 1 };
     *
     * _.eq(object, object);
     * // => true
     *
     * _.eq(object, other);
     * // => false
     *
     * _.eq('a', 'a');
     * // => true
     *
     * _.eq('a', Object('a'));
     * // => false
     *
     * _.eq(NaN, NaN);
     * // => true
     */
    function eq(value, other) {
      return value === other || (value !== value && other !== other);
    }

    /**
     * Checks if `value` is greater than `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than `other`,
     *  else `false`.
     * @see _.lt
     * @example
     *
     * _.gt(3, 1);
     * // => true
     *
     * _.gt(3, 3);
     * // => false
     *
     * _.gt(1, 3);
     * // => false
     */
    var gt = createRelationalOperation(baseGt);

    /**
     * Checks if `value` is greater than or equal to `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than or equal to
     *  `other`, else `false`.
     * @see _.lte
     * @example
     *
     * _.gte(3, 1);
     * // => true
     *
     * _.gte(3, 3);
     * // => true
     *
     * _.gte(1, 3);
     * // => false
     */
    var gte = createRelationalOperation(function(value, other) {
      return value >= other;
    });

    /**
     * Checks if `value` is likely an `arguments` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an `arguments` object,
     *  else `false`.
     * @example
     *
     * _.isArguments(function() { return arguments; }());
     * // => true
     *
     * _.isArguments([1, 2, 3]);
     * // => false
     */
    var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
      return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
        !propertyIsEnumerable.call(value, 'callee');
    };

    /**
     * Checks if `value` is classified as an `Array` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array, else `false`.
     * @example
     *
     * _.isArray([1, 2, 3]);
     * // => true
     *
     * _.isArray(document.body.children);
     * // => false
     *
     * _.isArray('abc');
     * // => false
     *
     * _.isArray(_.noop);
     * // => false
     */
    var isArray = Array.isArray;

    /**
     * Checks if `value` is classified as an `ArrayBuffer` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
     * @example
     *
     * _.isArrayBuffer(new ArrayBuffer(2));
     * // => true
     *
     * _.isArrayBuffer(new Array(2));
     * // => false
     */
    var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;

    /**
     * Checks if `value` is array-like. A value is considered array-like if it's
     * not a function and has a `value.length` that's an integer greater than or
     * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
     * @example
     *
     * _.isArrayLike([1, 2, 3]);
     * // => true
     *
     * _.isArrayLike(document.body.children);
     * // => true
     *
     * _.isArrayLike('abc');
     * // => true
     *
     * _.isArrayLike(_.noop);
     * // => false
     */
    function isArrayLike(value) {
      return value != null && isLength(value.length) && !isFunction(value);
    }

    /**
     * This method is like `_.isArrayLike` except that it also checks if `value`
     * is an object.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array-like object,
     *  else `false`.
     * @example
     *
     * _.isArrayLikeObject([1, 2, 3]);
     * // => true
     *
     * _.isArrayLikeObject(document.body.children);
     * // => true
     *
     * _.isArrayLikeObject('abc');
     * // => false
     *
     * _.isArrayLikeObject(_.noop);
     * // => false
     */
    function isArrayLikeObject(value) {
      return isObjectLike(value) && isArrayLike(value);
    }

    /**
     * Checks if `value` is classified as a boolean primitive or object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
     * @example
     *
     * _.isBoolean(false);
     * // => true
     *
     * _.isBoolean(null);
     * // => false
     */
    function isBoolean(value) {
      return value === true || value === false ||
        (isObjectLike(value) && baseGetTag(value) == boolTag);
    }

    /**
     * Checks if `value` is a buffer.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
     * @example
     *
     * _.isBuffer(new Buffer(2));
     * // => true
     *
     * _.isBuffer(new Uint8Array(2));
     * // => false
     */
    var isBuffer = nativeIsBuffer || stubFalse;

    /**
     * Checks if `value` is classified as a `Date` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
     * @example
     *
     * _.isDate(new Date);
     * // => true
     *
     * _.isDate('Mon April 23 2012');
     * // => false
     */
    var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;

    /**
     * Checks if `value` is likely a DOM element.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
     * @example
     *
     * _.isElement(document.body);
     * // => true
     *
     * _.isElement('<body>');
     * // => false
     */
    function isElement(value) {
      return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
    }

    /**
     * Checks if `value` is an empty object, collection, map, or set.
     *
     * Objects are considered empty if they have no own enumerable string keyed
     * properties.
     *
     * Array-like values such as `arguments` objects, arrays, buffers, strings, or
     * jQuery-like collections are considered empty if they have a `length` of `0`.
     * Similarly, maps and sets are considered empty if they have a `size` of `0`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
     * @example
     *
     * _.isEmpty(null);
     * // => true
     *
     * _.isEmpty(true);
     * // => true
     *
     * _.isEmpty(1);
     * // => true
     *
     * _.isEmpty([1, 2, 3]);
     * // => false
     *
     * _.isEmpty({ 'a': 1 });
     * // => false
     */
    function isEmpty(value) {
      if (value == null) {
        return true;
      }
      if (isArrayLike(value) &&
          (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
            isBuffer(value) || isTypedArray(value) || isArguments(value))) {
        return !value.length;
      }
      var tag = getTag(value);
      if (tag == mapTag || tag == setTag) {
        return !value.size;
      }
      if (isPrototype(value)) {
        return !baseKeys(value).length;
      }
      for (var key in value) {
        if (hasOwnProperty.call(value, key)) {
          return false;
        }
      }
      return true;
    }

    /**
     * Performs a deep comparison between two values to determine if they are
     * equivalent.
     *
     * **Note:** This method supports comparing arrays, array buffers, booleans,
     * date objects, error objects, maps, numbers, `Object` objects, regexes,
     * sets, strings, symbols, and typed arrays. `Object` objects are compared
     * by their own, not inherited, enumerable properties. Functions and DOM
     * nodes are compared by strict equality, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'a': 1 };
     * var other = { 'a': 1 };
     *
     * _.isEqual(object, other);
     * // => true
     *
     * object === other;
     * // => false
     */
    function isEqual(value, other) {
      return baseIsEqual(value, other);
    }

    /**
     * This method is like `_.isEqual` except that it accepts `customizer` which
     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
     * are handled by the method instead. The `customizer` is invoked with up to
     * six arguments: (objValue, othValue [, index|key, object, other, stack]).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @param {Function} [customizer] The function to customize comparisons.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * function isGreeting(value) {
     *   return /^h(?:i|ello)$/.test(value);
     * }
     *
     * function customizer(objValue, othValue) {
     *   if (isGreeting(objValue) && isGreeting(othValue)) {
     *     return true;
     *   }
     * }
     *
     * var array = ['hello', 'goodbye'];
     * var other = ['hi', 'goodbye'];
     *
     * _.isEqualWith(array, other, customizer);
     * // => true
     */
    function isEqualWith(value, other, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      var result = customizer ? customizer(value, other) : undefined;
      return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
    }

    /**
     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
     * `SyntaxError`, `TypeError`, or `URIError` object.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
     * @example
     *
     * _.isError(new Error);
     * // => true
     *
     * _.isError(Error);
     * // => false
     */
    function isError(value) {
      if (!isObjectLike(value)) {
        return false;
      }
      var tag = baseGetTag(value);
      return tag == errorTag || tag == domExcTag ||
        (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
    }

    /**
     * Checks if `value` is a finite primitive number.
     *
     * **Note:** This method is based on
     * [`Number.isFinite`](https://mdn.io/Number/isFinite).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
     * @example
     *
     * _.isFinite(3);
     * // => true
     *
     * _.isFinite(Number.MIN_VALUE);
     * // => true
     *
     * _.isFinite(Infinity);
     * // => false
     *
     * _.isFinite('3');
     * // => false
     */
    function isFinite(value) {
      return typeof value == 'number' && nativeIsFinite(value);
    }

    /**
     * Checks if `value` is classified as a `Function` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a function, else `false`.
     * @example
     *
     * _.isFunction(_);
     * // => true
     *
     * _.isFunction(/abc/);
     * // => false
     */
    function isFunction(value) {
      if (!isObject(value)) {
        return false;
      }
      // The use of `Object#toString` avoids issues with the `typeof` operator
      // in Safari 9 which returns 'object' for typed arrays and other constructors.
      var tag = baseGetTag(value);
      return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
    }

    /**
     * Checks if `value` is an integer.
     *
     * **Note:** This method is based on
     * [`Number.isInteger`](https://mdn.io/Number/isInteger).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
     * @example
     *
     * _.isInteger(3);
     * // => true
     *
     * _.isInteger(Number.MIN_VALUE);
     * // => false
     *
     * _.isInteger(Infinity);
     * // => false
     *
     * _.isInteger('3');
     * // => false
     */
    function isInteger(value) {
      return typeof value == 'number' && value == toInteger(value);
    }

    /**
     * Checks if `value` is a valid array-like length.
     *
     * **Note:** This method is loosely based on
     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
     * @example
     *
     * _.isLength(3);
     * // => true
     *
     * _.isLength(Number.MIN_VALUE);
     * // => false
     *
     * _.isLength(Infinity);
     * // => false
     *
     * _.isLength('3');
     * // => false
     */
    function isLength(value) {
      return typeof value == 'number' &&
        value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
    }

    /**
     * Checks if `value` is the
     * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
     * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
     * @example
     *
     * _.isObject({});
     * // => true
     *
     * _.isObject([1, 2, 3]);
     * // => true
     *
     * _.isObject(_.noop);
     * // => true
     *
     * _.isObject(null);
     * // => false
     */
    function isObject(value) {
      var type = typeof value;
      return value != null && (type == 'object' || type == 'function');
    }

    /**
     * Checks if `value` is object-like. A value is object-like if it's not `null`
     * and has a `typeof` result of "object".
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
     * @example
     *
     * _.isObjectLike({});
     * // => true
     *
     * _.isObjectLike([1, 2, 3]);
     * // => true
     *
     * _.isObjectLike(_.noop);
     * // => false
     *
     * _.isObjectLike(null);
     * // => false
     */
    function isObjectLike(value) {
      return value != null && typeof value == 'object';
    }

    /**
     * Checks if `value` is classified as a `Map` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a map, else `false`.
     * @example
     *
     * _.isMap(new Map);
     * // => true
     *
     * _.isMap(new WeakMap);
     * // => false
     */
    var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;

    /**
     * Performs a partial deep comparison between `object` and `source` to
     * determine if `object` contains equivalent property values.
     *
     * **Note:** This method is equivalent to `_.matches` when `source` is
     * partially applied.
     *
     * Partial comparisons will match empty array and empty object `source`
     * values against any array or object value, respectively. See `_.isEqual`
     * for a list of supported value comparisons.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     * @example
     *
     * var object = { 'a': 1, 'b': 2 };
     *
     * _.isMatch(object, { 'b': 2 });
     * // => true
     *
     * _.isMatch(object, { 'b': 1 });
     * // => false
     */
    function isMatch(object, source) {
      return object === source || baseIsMatch(object, source, getMatchData(source));
    }

    /**
     * This method is like `_.isMatch` except that it accepts `customizer` which
     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
     * are handled by the method instead. The `customizer` is invoked with five
     * arguments: (objValue, srcValue, index|key, object, source).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @param {Function} [customizer] The function to customize comparisons.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     * @example
     *
     * function isGreeting(value) {
     *   return /^h(?:i|ello)$/.test(value);
     * }
     *
     * function customizer(objValue, srcValue) {
     *   if (isGreeting(objValue) && isGreeting(srcValue)) {
     *     return true;
     *   }
     * }
     *
     * var object = { 'greeting': 'hello' };
     * var source = { 'greeting': 'hi' };
     *
     * _.isMatchWith(object, source, customizer);
     * // => true
     */
    function isMatchWith(object, source, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return baseIsMatch(object, source, getMatchData(source), customizer);
    }

    /**
     * Checks if `value` is `NaN`.
     *
     * **Note:** This method is based on
     * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
     * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
     * `undefined` and other non-number values.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
     * @example
     *
     * _.isNaN(NaN);
     * // => true
     *
     * _.isNaN(new Number(NaN));
     * // => true
     *
     * isNaN(undefined);
     * // => true
     *
     * _.isNaN(undefined);
     * // => false
     */
    function isNaN(value) {
      // An `NaN` primitive is the only value that is not equal to itself.
      // Perform the `toStringTag` check first to avoid errors with some
      // ActiveX objects in IE.
      return isNumber(value) && value != +value;
    }

    /**
     * Checks if `value` is a pristine native function.
     *
     * **Note:** This method can't reliably detect native functions in the presence
     * of the core-js package because core-js circumvents this kind of detection.
     * Despite multiple requests, the core-js maintainer has made it clear: any
     * attempt to fix the detection will be obstructed. As a result, we're left
     * with little choice but to throw an error. Unfortunately, this also affects
     * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
     * which rely on core-js.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a native function,
     *  else `false`.
     * @example
     *
     * _.isNative(Array.prototype.push);
     * // => true
     *
     * _.isNative(_);
     * // => false
     */
    function isNative(value) {
      if (isMaskable(value)) {
        throw new Error(CORE_ERROR_TEXT);
      }
      return baseIsNative(value);
    }

    /**
     * Checks if `value` is `null`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
     * @example
     *
     * _.isNull(null);
     * // => true
     *
     * _.isNull(void 0);
     * // => false
     */
    function isNull(value) {
      return value === null;
    }

    /**
     * Checks if `value` is `null` or `undefined`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
     * @example
     *
     * _.isNil(null);
     * // => true
     *
     * _.isNil(void 0);
     * // => true
     *
     * _.isNil(NaN);
     * // => false
     */
    function isNil(value) {
      return value == null;
    }

    /**
     * Checks if `value` is classified as a `Number` primitive or object.
     *
     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
     * classified as numbers, use the `_.isFinite` method.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a number, else `false`.
     * @example
     *
     * _.isNumber(3);
     * // => true
     *
     * _.isNumber(Number.MIN_VALUE);
     * // => true
     *
     * _.isNumber(Infinity);
     * // => true
     *
     * _.isNumber('3');
     * // => false
     */
    function isNumber(value) {
      return typeof value == 'number' ||
        (isObjectLike(value) && baseGetTag(value) == numberTag);
    }

    /**
     * Checks if `value` is a plain object, that is, an object created by the
     * `Object` constructor or one with a `[[Prototype]]` of `null`.
     *
     * @static
     * @memberOf _
     * @since 0.8.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * _.isPlainObject(new Foo);
     * // => false
     *
     * _.isPlainObject([1, 2, 3]);
     * // => false
     *
     * _.isPlainObject({ 'x': 0, 'y': 0 });
     * // => true
     *
     * _.isPlainObject(Object.create(null));
     * // => true
     */
    function isPlainObject(value) {
      if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
        return false;
      }
      var proto = getPrototype(value);
      if (proto === null) {
        return true;
      }
      var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
      return typeof Ctor == 'function' && Ctor instanceof Ctor &&
        funcToString.call(Ctor) == objectCtorString;
    }

    /**
     * Checks if `value` is classified as a `RegExp` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
     * @example
     *
     * _.isRegExp(/abc/);
     * // => true
     *
     * _.isRegExp('/abc/');
     * // => false
     */
    var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;

    /**
     * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
     * double precision number which isn't the result of a rounded unsafe integer.
     *
     * **Note:** This method is based on
     * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
     * @example
     *
     * _.isSafeInteger(3);
     * // => true
     *
     * _.isSafeInteger(Number.MIN_VALUE);
     * // => false
     *
     * _.isSafeInteger(Infinity);
     * // => false
     *
     * _.isSafeInteger('3');
     * // => false
     */
    function isSafeInteger(value) {
      return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
    }

    /**
     * Checks if `value` is classified as a `Set` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a set, else `false`.
     * @example
     *
     * _.isSet(new Set);
     * // => true
     *
     * _.isSet(new WeakSet);
     * // => false
     */
    var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;

    /**
     * Checks if `value` is classified as a `String` primitive or object.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a string, else `false`.
     * @example
     *
     * _.isString('abc');
     * // => true
     *
     * _.isString(1);
     * // => false
     */
    function isString(value) {
      return typeof value == 'string' ||
        (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
    }

    /**
     * Checks if `value` is classified as a `Symbol` primitive or object.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
     * @example
     *
     * _.isSymbol(Symbol.iterator);
     * // => true
     *
     * _.isSymbol('abc');
     * // => false
     */
    function isSymbol(value) {
      return typeof value == 'symbol' ||
        (isObjectLike(value) && baseGetTag(value) == symbolTag);
    }

    /**
     * Checks if `value` is classified as a typed array.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
     * @example
     *
     * _.isTypedArray(new Uint8Array);
     * // => true
     *
     * _.isTypedArray([]);
     * // => false
     */
    var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;

    /**
     * Checks if `value` is `undefined`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
     * @example
     *
     * _.isUndefined(void 0);
     * // => true
     *
     * _.isUndefined(null);
     * // => false
     */
    function isUndefined(value) {
      return value === undefined;
    }

    /**
     * Checks if `value` is classified as a `WeakMap` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
     * @example
     *
     * _.isWeakMap(new WeakMap);
     * // => true
     *
     * _.isWeakMap(new Map);
     * // => false
     */
    function isWeakMap(value) {
      return isObjectLike(value) && getTag(value) == weakMapTag;
    }

    /**
     * Checks if `value` is classified as a `WeakSet` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
     * @example
     *
     * _.isWeakSet(new WeakSet);
     * // => true
     *
     * _.isWeakSet(new Set);
     * // => false
     */
    function isWeakSet(value) {
      return isObjectLike(value) && baseGetTag(value) == weakSetTag;
    }

    /**
     * Checks if `value` is less than `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than `other`,
     *  else `false`.
     * @see _.gt
     * @example
     *
     * _.lt(1, 3);
     * // => true
     *
     * _.lt(3, 3);
     * // => false
     *
     * _.lt(3, 1);
     * // => false
     */
    var lt = createRelationalOperation(baseLt);

    /**
     * Checks if `value` is less than or equal to `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than or equal to
     *  `other`, else `false`.
     * @see _.gte
     * @example
     *
     * _.lte(1, 3);
     * // => true
     *
     * _.lte(3, 3);
     * // => true
     *
     * _.lte(3, 1);
     * // => false
     */
    var lte = createRelationalOperation(function(value, other) {
      return value <= other;
    });

    /**
     * Converts `value` to an array.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {Array} Returns the converted array.
     * @example
     *
     * _.toArray({ 'a': 1, 'b': 2 });
     * // => [1, 2]
     *
     * _.toArray('abc');
     * // => ['a', 'b', 'c']
     *
     * _.toArray(1);
     * // => []
     *
     * _.toArray(null);
     * // => []
     */
    function toArray(value) {
      if (!value) {
        return [];
      }
      if (isArrayLike(value)) {
        return isString(value) ? stringToArray(value) : copyArray(value);
      }
      if (symIterator && value[symIterator]) {
        return iteratorToArray(value[symIterator]());
      }
      var tag = getTag(value),
          func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);

      return func(value);
    }

    /**
     * Converts `value` to a finite number.
     *
     * @static
     * @memberOf _
     * @since 4.12.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted number.
     * @example
     *
     * _.toFinite(3.2);
     * // => 3.2
     *
     * _.toFinite(Number.MIN_VALUE);
     * // => 5e-324
     *
     * _.toFinite(Infinity);
     * // => 1.7976931348623157e+308
     *
     * _.toFinite('3.2');
     * // => 3.2
     */
    function toFinite(value) {
      if (!value) {
        return value === 0 ? value : 0;
      }
      value = toNumber(value);
      if (value === INFINITY || value === -INFINITY) {
        var sign = (value < 0 ? -1 : 1);
        return sign * MAX_INTEGER;
      }
      return value === value ? value : 0;
    }

    /**
     * Converts `value` to an integer.
     *
     * **Note:** This method is loosely based on
     * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.toInteger(3.2);
     * // => 3
     *
     * _.toInteger(Number.MIN_VALUE);
     * // => 0
     *
     * _.toInteger(Infinity);
     * // => 1.7976931348623157e+308
     *
     * _.toInteger('3.2');
     * // => 3
     */
    function toInteger(value) {
      var result = toFinite(value),
          remainder = result % 1;

      return result === result ? (remainder ? result - remainder : result) : 0;
    }

    /**
     * Converts `value` to an integer suitable for use as the length of an
     * array-like object.
     *
     * **Note:** This method is based on
     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.toLength(3.2);
     * // => 3
     *
     * _.toLength(Number.MIN_VALUE);
     * // => 0
     *
     * _.toLength(Infinity);
     * // => 4294967295
     *
     * _.toLength('3.2');
     * // => 3
     */
    function toLength(value) {
      return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
    }

    /**
     * Converts `value` to a number.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to process.
     * @returns {number} Returns the number.
     * @example
     *
     * _.toNumber(3.2);
     * // => 3.2
     *
     * _.toNumber(Number.MIN_VALUE);
     * // => 5e-324
     *
     * _.toNumber(Infinity);
     * // => Infinity
     *
     * _.toNumber('3.2');
     * // => 3.2
     */
    function toNumber(value) {
      if (typeof value == 'number') {
        return value;
      }
      if (isSymbol(value)) {
        return NAN;
      }
      if (isObject(value)) {
        var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
        value = isObject(other) ? (other + '') : other;
      }
      if (typeof value != 'string') {
        return value === 0 ? value : +value;
      }
      value = value.replace(reTrim, '');
      var isBinary = reIsBinary.test(value);
      return (isBinary || reIsOctal.test(value))
        ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
        : (reIsBadHex.test(value) ? NAN : +value);
    }

    /**
     * Converts `value` to a plain object flattening inherited enumerable string
     * keyed properties of `value` to own properties of the plain object.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {Object} Returns the converted plain object.
     * @example
     *
     * function Foo() {
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.assign({ 'a': 1 }, new Foo);
     * // => { 'a': 1, 'b': 2 }
     *
     * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
     * // => { 'a': 1, 'b': 2, 'c': 3 }
     */
    function toPlainObject(value) {
      return copyObject(value, keysIn(value));
    }

    /**
     * Converts `value` to a safe integer. A safe integer can be compared and
     * represented correctly.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.toSafeInteger(3.2);
     * // => 3
     *
     * _.toSafeInteger(Number.MIN_VALUE);
     * // => 0
     *
     * _.toSafeInteger(Infinity);
     * // => 9007199254740991
     *
     * _.toSafeInteger('3.2');
     * // => 3
     */
    function toSafeInteger(value) {
      return value
        ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
        : (value === 0 ? value : 0);
    }

    /**
     * Converts `value` to a string. An empty string is returned for `null`
     * and `undefined` values. The sign of `-0` is preserved.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {string} Returns the converted string.
     * @example
     *
     * _.toString(null);
     * // => ''
     *
     * _.toString(-0);
     * // => '-0'
     *
     * _.toString([1, 2, 3]);
     * // => '1,2,3'
     */
    function toString(value) {
      return value == null ? '' : baseToString(value);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Assigns own enumerable string keyed properties of source objects to the
     * destination object. Source objects are applied from left to right.
     * Subsequent sources overwrite property assignments of previous sources.
     *
     * **Note:** This method mutates `object` and is loosely based on
     * [`Object.assign`](https://mdn.io/Object/assign).
     *
     * @static
     * @memberOf _
     * @since 0.10.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.assignIn
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * function Bar() {
     *   this.c = 3;
     * }
     *
     * Foo.prototype.b = 2;
     * Bar.prototype.d = 4;
     *
     * _.assign({ 'a': 0 }, new Foo, new Bar);
     * // => { 'a': 1, 'c': 3 }
     */
    var assign = createAssigner(function(object, source) {
      if (isPrototype(source) || isArrayLike(source)) {
        copyObject(source, keys(source), object);
        return;
      }
      for (var key in source) {
        if (hasOwnProperty.call(source, key)) {
          assignValue(object, key, source[key]);
        }
      }
    });

    /**
     * This method is like `_.assign` except that it iterates over own and
     * inherited source properties.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias extend
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.assign
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * function Bar() {
     *   this.c = 3;
     * }
     *
     * Foo.prototype.b = 2;
     * Bar.prototype.d = 4;
     *
     * _.assignIn({ 'a': 0 }, new Foo, new Bar);
     * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
     */
    var assignIn = createAssigner(function(object, source) {
      copyObject(source, keysIn(source), object);
    });

    /**
     * This method is like `_.assignIn` except that it accepts `customizer`
     * which is invoked to produce the assigned values. If `customizer` returns
     * `undefined`, assignment is handled by the method instead. The `customizer`
     * is invoked with five arguments: (objValue, srcValue, key, object, source).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias extendWith
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} sources The source objects.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @see _.assignWith
     * @example
     *
     * function customizer(objValue, srcValue) {
     *   return _.isUndefined(objValue) ? srcValue : objValue;
     * }
     *
     * var defaults = _.partialRight(_.assignInWith, customizer);
     *
     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
     * // => { 'a': 1, 'b': 2 }
     */
    var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
      copyObject(source, keysIn(source), object, customizer);
    });

    /**
     * This method is like `_.assign` except that it accepts `customizer`
     * which is invoked to produce the assigned values. If `customizer` returns
     * `undefined`, assignment is handled by the method instead. The `customizer`
     * is invoked with five arguments: (objValue, srcValue, key, object, source).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} sources The source objects.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @see _.assignInWith
     * @example
     *
     * function customizer(objValue, srcValue) {
     *   return _.isUndefined(objValue) ? srcValue : objValue;
     * }
     *
     * var defaults = _.partialRight(_.assignWith, customizer);
     *
     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
     * // => { 'a': 1, 'b': 2 }
     */
    var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
      copyObject(source, keys(source), object, customizer);
    });

    /**
     * Creates an array of values corresponding to `paths` of `object`.
     *
     * @static
     * @memberOf _
     * @since 1.0.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {...(string|string[])} [paths] The property paths to pick.
     * @returns {Array} Returns the picked values.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
     *
     * _.at(object, ['a[0].b.c', 'a[1]']);
     * // => [3, 4]
     */
    var at = flatRest(baseAt);

    /**
     * Creates an object that inherits from the `prototype` object. If a
     * `properties` object is given, its own enumerable string keyed properties
     * are assigned to the created object.
     *
     * @static
     * @memberOf _
     * @since 2.3.0
     * @category Object
     * @param {Object} prototype The object to inherit from.
     * @param {Object} [properties] The properties to assign to the object.
     * @returns {Object} Returns the new object.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * function Circle() {
     *   Shape.call(this);
     * }
     *
     * Circle.prototype = _.create(Shape.prototype, {
     *   'constructor': Circle
     * });
     *
     * var circle = new Circle;
     * circle instanceof Circle;
     * // => true
     *
     * circle instanceof Shape;
     * // => true
     */
    function create(prototype, properties) {
      var result = baseCreate(prototype);
      return properties == null ? result : baseAssign(result, properties);
    }

    /**
     * Assigns own and inherited enumerable string keyed properties of source
     * objects to the destination object for all destination properties that
     * resolve to `undefined`. Source objects are applied from left to right.
     * Once a property is set, additional values of the same property are ignored.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.defaultsDeep
     * @example
     *
     * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
     * // => { 'a': 1, 'b': 2 }
     */
    var defaults = baseRest(function(object, sources) {
      object = Object(object);

      var index = -1;
      var length = sources.length;
      var guard = length > 2 ? sources[2] : undefined;

      if (guard && isIterateeCall(sources[0], sources[1], guard)) {
        length = 1;
      }

      while (++index < length) {
        var source = sources[index];
        var props = keysIn(source);
        var propsIndex = -1;
        var propsLength = props.length;

        while (++propsIndex < propsLength) {
          var key = props[propsIndex];
          var value = object[key];

          if (value === undefined ||
              (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
            object[key] = source[key];
          }
        }
      }

      return object;
    });

    /**
     * This method is like `_.defaults` except that it recursively assigns
     * default properties.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.defaults
     * @example
     *
     * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
     * // => { 'a': { 'b': 2, 'c': 3 } }
     */
    var defaultsDeep = baseRest(function(args) {
      args.push(undefined, customDefaultsMerge);
      return apply(mergeWith, undefined, args);
    });

    /**
     * This method is like `_.find` except that it returns the key of the first
     * element `predicate` returns truthy for instead of the element itself.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category Object
     * @param {Object} object The object to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {string|undefined} Returns the key of the matched element,
     *  else `undefined`.
     * @example
     *
     * var users = {
     *   'barney':  { 'age': 36, 'active': true },
     *   'fred':    { 'age': 40, 'active': false },
     *   'pebbles': { 'age': 1,  'active': true }
     * };
     *
     * _.findKey(users, function(o) { return o.age < 40; });
     * // => 'barney' (iteration order is not guaranteed)
     *
     * // The `_.matches` iteratee shorthand.
     * _.findKey(users, { 'age': 1, 'active': true });
     * // => 'pebbles'
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findKey(users, ['active', false]);
     * // => 'fred'
     *
     * // The `_.property` iteratee shorthand.
     * _.findKey(users, 'active');
     * // => 'barney'
     */
    function findKey(object, predicate) {
      return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
    }

    /**
     * This method is like `_.findKey` except that it iterates over elements of
     * a collection in the opposite order.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Object
     * @param {Object} object The object to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {string|undefined} Returns the key of the matched element,
     *  else `undefined`.
     * @example
     *
     * var users = {
     *   'barney':  { 'age': 36, 'active': true },
     *   'fred':    { 'age': 40, 'active': false },
     *   'pebbles': { 'age': 1,  'active': true }
     * };
     *
     * _.findLastKey(users, function(o) { return o.age < 40; });
     * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
     *
     * // The `_.matches` iteratee shorthand.
     * _.findLastKey(users, { 'age': 36, 'active': true });
     * // => 'barney'
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findLastKey(users, ['active', false]);
     * // => 'fred'
     *
     * // The `_.property` iteratee shorthand.
     * _.findLastKey(users, 'active');
     * // => 'pebbles'
     */
    function findLastKey(object, predicate) {
      return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
    }

    /**
     * Iterates over own and inherited enumerable string keyed properties of an
     * object and invokes `iteratee` for each property. The iteratee is invoked
     * with three arguments: (value, key, object). Iteratee functions may exit
     * iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @since 0.3.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forInRight
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forIn(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
     */
    function forIn(object, iteratee) {
      return object == null
        ? object
        : baseFor(object, getIteratee(iteratee, 3), keysIn);
    }

    /**
     * This method is like `_.forIn` except that it iterates over properties of
     * `object` in the opposite order.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forIn
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forInRight(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
     */
    function forInRight(object, iteratee) {
      return object == null
        ? object
        : baseForRight(object, getIteratee(iteratee, 3), keysIn);
    }

    /**
     * Iterates over own enumerable string keyed properties of an object and
     * invokes `iteratee` for each property. The iteratee is invoked with three
     * arguments: (value, key, object). Iteratee functions may exit iteration
     * early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @since 0.3.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forOwnRight
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forOwn(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
     */
    function forOwn(object, iteratee) {
      return object && baseForOwn(object, getIteratee(iteratee, 3));
    }

    /**
     * This method is like `_.forOwn` except that it iterates over properties of
     * `object` in the opposite order.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forOwn
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forOwnRight(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
     */
    function forOwnRight(object, iteratee) {
      return object && baseForOwnRight(object, getIteratee(iteratee, 3));
    }

    /**
     * Creates an array of function property names from own enumerable properties
     * of `object`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns the function names.
     * @see _.functionsIn
     * @example
     *
     * function Foo() {
     *   this.a = _.constant('a');
     *   this.b = _.constant('b');
     * }
     *
     * Foo.prototype.c = _.constant('c');
     *
     * _.functions(new Foo);
     * // => ['a', 'b']
     */
    function functions(object) {
      return object == null ? [] : baseFunctions(object, keys(object));
    }

    /**
     * Creates an array of function property names from own and inherited
     * enumerable properties of `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns the function names.
     * @see _.functions
     * @example
     *
     * function Foo() {
     *   this.a = _.constant('a');
     *   this.b = _.constant('b');
     * }
     *
     * Foo.prototype.c = _.constant('c');
     *
     * _.functionsIn(new Foo);
     * // => ['a', 'b', 'c']
     */
    function functionsIn(object) {
      return object == null ? [] : baseFunctions(object, keysIn(object));
    }

    /**
     * Gets the value at `path` of `object`. If the resolved value is
     * `undefined`, the `defaultValue` is returned in its place.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to get.
     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.get(object, 'a[0].b.c');
     * // => 3
     *
     * _.get(object, ['a', '0', 'b', 'c']);
     * // => 3
     *
     * _.get(object, 'a.b.c', 'default');
     * // => 'default'
     */
    function get(object, path, defaultValue) {
      var result = object == null ? undefined : baseGet(object, path);
      return result === undefined ? defaultValue : result;
    }

    /**
     * Checks if `path` is a direct property of `object`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @returns {boolean} Returns `true` if `path` exists, else `false`.
     * @example
     *
     * var object = { 'a': { 'b': 2 } };
     * var other = _.create({ 'a': _.create({ 'b': 2 }) });
     *
     * _.has(object, 'a');
     * // => true
     *
     * _.has(object, 'a.b');
     * // => true
     *
     * _.has(object, ['a', 'b']);
     * // => true
     *
     * _.has(other, 'a');
     * // => false
     */
    function has(object, path) {
      return object != null && hasPath(object, path, baseHas);
    }

    /**
     * Checks if `path` is a direct or inherited property of `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @returns {boolean} Returns `true` if `path` exists, else `false`.
     * @example
     *
     * var object = _.create({ 'a': _.create({ 'b': 2 }) });
     *
     * _.hasIn(object, 'a');
     * // => true
     *
     * _.hasIn(object, 'a.b');
     * // => true
     *
     * _.hasIn(object, ['a', 'b']);
     * // => true
     *
     * _.hasIn(object, 'b');
     * // => false
     */
    function hasIn(object, path) {
      return object != null && hasPath(object, path, baseHasIn);
    }

    /**
     * Creates an object composed of the inverted keys and values of `object`.
     * If `object` contains duplicate values, subsequent values overwrite
     * property assignments of previous values.
     *
     * @static
     * @memberOf _
     * @since 0.7.0
     * @category Object
     * @param {Object} object The object to invert.
     * @returns {Object} Returns the new inverted object.
     * @example
     *
     * var object = { 'a': 1, 'b': 2, 'c': 1 };
     *
     * _.invert(object);
     * // => { '1': 'c', '2': 'b' }
     */
    var invert = createInverter(function(result, value, key) {
      if (value != null &&
          typeof value.toString != 'function') {
        value = nativeObjectToString.call(value);
      }

      result[value] = key;
    }, constant(identity));

    /**
     * This method is like `_.invert` except that the inverted object is generated
     * from the results of running each element of `object` thru `iteratee`. The
     * corresponding inverted value of each inverted key is an array of keys
     * responsible for generating the inverted value. The iteratee is invoked
     * with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.1.0
     * @category Object
     * @param {Object} object The object to invert.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Object} Returns the new inverted object.
     * @example
     *
     * var object = { 'a': 1, 'b': 2, 'c': 1 };
     *
     * _.invertBy(object);
     * // => { '1': ['a', 'c'], '2': ['b'] }
     *
     * _.invertBy(object, function(value) {
     *   return 'group' + value;
     * });
     * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
     */
    var invertBy = createInverter(function(result, value, key) {
      if (value != null &&
          typeof value.toString != 'function') {
        value = nativeObjectToString.call(value);
      }

      if (hasOwnProperty.call(result, value)) {
        result[value].push(key);
      } else {
        result[value] = [key];
      }
    }, getIteratee);

    /**
     * Invokes the method at `path` of `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the method to invoke.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {*} Returns the result of the invoked method.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
     *
     * _.invoke(object, 'a[0].b.c.slice', 1, 3);
     * // => [2, 3]
     */
    var invoke = baseRest(baseInvoke);

    /**
     * Creates an array of the own enumerable property names of `object`.
     *
     * **Note:** Non-object values are coerced to objects. See the
     * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
     * for more details.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.keys(new Foo);
     * // => ['a', 'b'] (iteration order is not guaranteed)
     *
     * _.keys('hi');
     * // => ['0', '1']
     */
    function keys(object) {
      return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
    }

    /**
     * Creates an array of the own and inherited enumerable property names of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.keysIn(new Foo);
     * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
     */
    function keysIn(object) {
      return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
    }

    /**
     * The opposite of `_.mapValues`; this method creates an object with the
     * same values as `object` and keys generated by running each own enumerable
     * string keyed property of `object` thru `iteratee`. The iteratee is invoked
     * with three arguments: (value, key, object).
     *
     * @static
     * @memberOf _
     * @since 3.8.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns the new mapped object.
     * @see _.mapValues
     * @example
     *
     * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
     *   return key + value;
     * });
     * // => { 'a1': 1, 'b2': 2 }
     */
    function mapKeys(object, iteratee) {
      var result = {};
      iteratee = getIteratee(iteratee, 3);

      baseForOwn(object, function(value, key, object) {
        baseAssignValue(result, iteratee(value, key, object), value);
      });
      return result;
    }

    /**
     * Creates an object with the same keys as `object` and values generated
     * by running each own enumerable string keyed property of `object` thru
     * `iteratee`. The iteratee is invoked with three arguments:
     * (value, key, object).
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns the new mapped object.
     * @see _.mapKeys
     * @example
     *
     * var users = {
     *   'fred':    { 'user': 'fred',    'age': 40 },
     *   'pebbles': { 'user': 'pebbles', 'age': 1 }
     * };
     *
     * _.mapValues(users, function(o) { return o.age; });
     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
     *
     * // The `_.property` iteratee shorthand.
     * _.mapValues(users, 'age');
     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
     */
    function mapValues(object, iteratee) {
      var result = {};
      iteratee = getIteratee(iteratee, 3);

      baseForOwn(object, function(value, key, object) {
        baseAssignValue(result, key, iteratee(value, key, object));
      });
      return result;
    }

    /**
     * This method is like `_.assign` except that it recursively merges own and
     * inherited enumerable string keyed properties of source objects into the
     * destination object. Source properties that resolve to `undefined` are
     * skipped if a destination value exists. Array and plain object properties
     * are merged recursively. Other objects and value types are overridden by
     * assignment. Source objects are applied from left to right. Subsequent
     * sources overwrite property assignments of previous sources.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 0.5.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = {
     *   'a': [{ 'b': 2 }, { 'd': 4 }]
     * };
     *
     * var other = {
     *   'a': [{ 'c': 3 }, { 'e': 5 }]
     * };
     *
     * _.merge(object, other);
     * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
     */
    var merge = createAssigner(function(object, source, srcIndex) {
      baseMerge(object, source, srcIndex);
    });

    /**
     * This method is like `_.merge` except that it accepts `customizer` which
     * is invoked to produce the merged values of the destination and source
     * properties. If `customizer` returns `undefined`, merging is handled by the
     * method instead. The `customizer` is invoked with six arguments:
     * (objValue, srcValue, key, object, source, stack).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} sources The source objects.
     * @param {Function} customizer The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function customizer(objValue, srcValue) {
     *   if (_.isArray(objValue)) {
     *     return objValue.concat(srcValue);
     *   }
     * }
     *
     * var object = { 'a': [1], 'b': [2] };
     * var other = { 'a': [3], 'b': [4] };
     *
     * _.mergeWith(object, other, customizer);
     * // => { 'a': [1, 3], 'b': [2, 4] }
     */
    var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
      baseMerge(object, source, srcIndex, customizer);
    });

    /**
     * The opposite of `_.pick`; this method creates an object composed of the
     * own and inherited enumerable property paths of `object` that are not omitted.
     *
     * **Note:** This method is considerably slower than `_.pick`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The source object.
     * @param {...(string|string[])} [paths] The property paths to omit.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.omit(object, ['a', 'c']);
     * // => { 'b': '2' }
     */
    var omit = flatRest(function(object, paths) {
      var result = {};
      if (object == null) {
        return result;
      }
      var isDeep = false;
      paths = arrayMap(paths, function(path) {
        path = castPath(path, object);
        isDeep || (isDeep = path.length > 1);
        return path;
      });
      copyObject(object, getAllKeysIn(object), result);
      if (isDeep) {
        result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
      }
      var length = paths.length;
      while (length--) {
        baseUnset(result, paths[length]);
      }
      return result;
    });

    /**
     * The opposite of `_.pickBy`; this method creates an object composed of
     * the own and inherited enumerable string keyed properties of `object` that
     * `predicate` doesn't return truthy for. The predicate is invoked with two
     * arguments: (value, key).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The source object.
     * @param {Function} [predicate=_.identity] The function invoked per property.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.omitBy(object, _.isNumber);
     * // => { 'b': '2' }
     */
    function omitBy(object, predicate) {
      return pickBy(object, negate(getIteratee(predicate)));
    }

    /**
     * Creates an object composed of the picked `object` properties.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The source object.
     * @param {...(string|string[])} [paths] The property paths to pick.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.pick(object, ['a', 'c']);
     * // => { 'a': 1, 'c': 3 }
     */
    var pick = flatRest(function(object, paths) {
      return object == null ? {} : basePick(object, paths);
    });

    /**
     * Creates an object composed of the `object` properties `predicate` returns
     * truthy for. The predicate is invoked with two arguments: (value, key).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The source object.
     * @param {Function} [predicate=_.identity] The function invoked per property.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.pickBy(object, _.isNumber);
     * // => { 'a': 1, 'c': 3 }
     */
    function pickBy(object, predicate) {
      if (object == null) {
        return {};
      }
      var props = arrayMap(getAllKeysIn(object), function(prop) {
        return [prop];
      });
      predicate = getIteratee(predicate);
      return basePickBy(object, props, function(value, path) {
        return predicate(value, path[0]);
      });
    }

    /**
     * This method is like `_.get` except that if the resolved value is a
     * function it's invoked with the `this` binding of its parent object and
     * its result is returned.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to resolve.
     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
     *
     * _.result(object, 'a[0].b.c1');
     * // => 3
     *
     * _.result(object, 'a[0].b.c2');
     * // => 4
     *
     * _.result(object, 'a[0].b.c3', 'default');
     * // => 'default'
     *
     * _.result(object, 'a[0].b.c3', _.constant('default'));
     * // => 'default'
     */
    function result(object, path, defaultValue) {
      path = castPath(path, object);

      var index = -1,
          length = path.length;

      // Ensure the loop is entered when path is empty.
      if (!length) {
        length = 1;
        object = undefined;
      }
      while (++index < length) {
        var value = object == null ? undefined : object[toKey(path[index])];
        if (value === undefined) {
          index = length;
          value = defaultValue;
        }
        object = isFunction(value) ? value.call(object) : value;
      }
      return object;
    }

    /**
     * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
     * it's created. Arrays are created for missing index properties while objects
     * are created for all other missing properties. Use `_.setWith` to customize
     * `path` creation.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.set(object, 'a[0].b.c', 4);
     * console.log(object.a[0].b.c);
     * // => 4
     *
     * _.set(object, ['x', '0', 'y', 'z'], 5);
     * console.log(object.x[0].y.z);
     * // => 5
     */
    function set(object, path, value) {
      return object == null ? object : baseSet(object, path, value);
    }

    /**
     * This method is like `_.set` except that it accepts `customizer` which is
     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
     * path creation is handled by the method instead. The `customizer` is invoked
     * with three arguments: (nsValue, key, nsObject).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = {};
     *
     * _.setWith(object, '[0][1]', 'a', Object);
     * // => { '0': { '1': 'a' } }
     */
    function setWith(object, path, value, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return object == null ? object : baseSet(object, path, value, customizer);
    }

    /**
     * Creates an array of own enumerable string keyed-value pairs for `object`
     * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
     * entries are returned.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias entries
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the key-value pairs.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.toPairs(new Foo);
     * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
     */
    var toPairs = createToPairs(keys);

    /**
     * Creates an array of own and inherited enumerable string keyed-value pairs
     * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
     * or set, its entries are returned.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias entriesIn
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the key-value pairs.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.toPairsIn(new Foo);
     * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
     */
    var toPairsIn = createToPairs(keysIn);

    /**
     * An alternative to `_.reduce`; this method transforms `object` to a new
     * `accumulator` object which is the result of running each of its own
     * enumerable string keyed properties thru `iteratee`, with each invocation
     * potentially mutating the `accumulator` object. If `accumulator` is not
     * provided, a new object with the same `[[Prototype]]` will be used. The
     * iteratee is invoked with four arguments: (accumulator, value, key, object).
     * Iteratee functions may exit iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @since 1.3.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The custom accumulator value.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * _.transform([2, 3, 4], function(result, n) {
     *   result.push(n *= n);
     *   return n % 2 == 0;
     * }, []);
     * // => [4, 9]
     *
     * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
     *   (result[value] || (result[value] = [])).push(key);
     * }, {});
     * // => { '1': ['a', 'c'], '2': ['b'] }
     */
    function transform(object, iteratee, accumulator) {
      var isArr = isArray(object),
          isArrLike = isArr || isBuffer(object) || isTypedArray(object);

      iteratee = getIteratee(iteratee, 4);
      if (accumulator == null) {
        var Ctor = object && object.constructor;
        if (isArrLike) {
          accumulator = isArr ? new Ctor : [];
        }
        else if (isObject(object)) {
          accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
        }
        else {
          accumulator = {};
        }
      }
      (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
        return iteratee(accumulator, value, index, object);
      });
      return accumulator;
    }

    /**
     * Removes the property at `path` of `object`.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to unset.
     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 7 } }] };
     * _.unset(object, 'a[0].b.c');
     * // => true
     *
     * console.log(object);
     * // => { 'a': [{ 'b': {} }] };
     *
     * _.unset(object, ['a', '0', 'b', 'c']);
     * // => true
     *
     * console.log(object);
     * // => { 'a': [{ 'b': {} }] };
     */
    function unset(object, path) {
      return object == null ? true : baseUnset(object, path);
    }

    /**
     * This method is like `_.set` except that accepts `updater` to produce the
     * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
     * is invoked with one argument: (value).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.6.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {Function} updater The function to produce the updated value.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.update(object, 'a[0].b.c', function(n) { return n * n; });
     * console.log(object.a[0].b.c);
     * // => 9
     *
     * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
     * console.log(object.x[0].y.z);
     * // => 0
     */
    function update(object, path, updater) {
      return object == null ? object : baseUpdate(object, path, castFunction(updater));
    }

    /**
     * This method is like `_.update` except that it accepts `customizer` which is
     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
     * path creation is handled by the method instead. The `customizer` is invoked
     * with three arguments: (nsValue, key, nsObject).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.6.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {Function} updater The function to produce the updated value.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = {};
     *
     * _.updateWith(object, '[0][1]', _.constant('a'), Object);
     * // => { '0': { '1': 'a' } }
     */
    function updateWith(object, path, updater, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
    }

    /**
     * Creates an array of the own enumerable string keyed property values of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property values.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.values(new Foo);
     * // => [1, 2] (iteration order is not guaranteed)
     *
     * _.values('hi');
     * // => ['h', 'i']
     */
    function values(object) {
      return object == null ? [] : baseValues(object, keys(object));
    }

    /**
     * Creates an array of the own and inherited enumerable string keyed property
     * values of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property values.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.valuesIn(new Foo);
     * // => [1, 2, 3] (iteration order is not guaranteed)
     */
    function valuesIn(object) {
      return object == null ? [] : baseValues(object, keysIn(object));
    }

    /*------------------------------------------------------------------------*/

    /**
     * Clamps `number` within the inclusive `lower` and `upper` bounds.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Number
     * @param {number} number The number to clamp.
     * @param {number} [lower] The lower bound.
     * @param {number} upper The upper bound.
     * @returns {number} Returns the clamped number.
     * @example
     *
     * _.clamp(-10, -5, 5);
     * // => -5
     *
     * _.clamp(10, -5, 5);
     * // => 5
     */
    function clamp(number, lower, upper) {
      if (upper === undefined) {
        upper = lower;
        lower = undefined;
      }
      if (upper !== undefined) {
        upper = toNumber(upper);
        upper = upper === upper ? upper : 0;
      }
      if (lower !== undefined) {
        lower = toNumber(lower);
        lower = lower === lower ? lower : 0;
      }
      return baseClamp(toNumber(number), lower, upper);
    }

    /**
     * Checks if `n` is between `start` and up to, but not including, `end`. If
     * `end` is not specified, it's set to `start` with `start` then set to `0`.
     * If `start` is greater than `end` the params are swapped to support
     * negative ranges.
     *
     * @static
     * @memberOf _
     * @since 3.3.0
     * @category Number
     * @param {number} number The number to check.
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
     * @see _.range, _.rangeRight
     * @example
     *
     * _.inRange(3, 2, 4);
     * // => true
     *
     * _.inRange(4, 8);
     * // => true
     *
     * _.inRange(4, 2);
     * // => false
     *
     * _.inRange(2, 2);
     * // => false
     *
     * _.inRange(1.2, 2);
     * // => true
     *
     * _.inRange(5.2, 4);
     * // => false
     *
     * _.inRange(-3, -2, -6);
     * // => true
     */
    function inRange(number, start, end) {
      start = toFinite(start);
      if (end === undefined) {
        end = start;
        start = 0;
      } else {
        end = toFinite(end);
      }
      number = toNumber(number);
      return baseInRange(number, start, end);
    }

    /**
     * Produces a random number between the inclusive `lower` and `upper` bounds.
     * If only one argument is provided a number between `0` and the given number
     * is returned. If `floating` is `true`, or either `lower` or `upper` are
     * floats, a floating-point number is returned instead of an integer.
     *
     * **Note:** JavaScript follows the IEEE-754 standard for resolving
     * floating-point values which can produce unexpected results.
     *
     * @static
     * @memberOf _
     * @since 0.7.0
     * @category Number
     * @param {number} [lower=0] The lower bound.
     * @param {number} [upper=1] The upper bound.
     * @param {boolean} [floating] Specify returning a floating-point number.
     * @returns {number} Returns the random number.
     * @example
     *
     * _.random(0, 5);
     * // => an integer between 0 and 5
     *
     * _.random(5);
     * // => also an integer between 0 and 5
     *
     * _.random(5, true);
     * // => a floating-point number between 0 and 5
     *
     * _.random(1.2, 5.2);
     * // => a floating-point number between 1.2 and 5.2
     */
    function random(lower, upper, floating) {
      if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
        upper = floating = undefined;
      }
      if (floating === undefined) {
        if (typeof upper == 'boolean') {
          floating = upper;
          upper = undefined;
        }
        else if (typeof lower == 'boolean') {
          floating = lower;
          lower = undefined;
        }
      }
      if (lower === undefined && upper === undefined) {
        lower = 0;
        upper = 1;
      }
      else {
        lower = toFinite(lower);
        if (upper === undefined) {
          upper = lower;
          lower = 0;
        } else {
          upper = toFinite(upper);
        }
      }
      if (lower > upper) {
        var temp = lower;
        lower = upper;
        upper = temp;
      }
      if (floating || lower % 1 || upper % 1) {
        var rand = nativeRandom();
        return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
      }
      return baseRandom(lower, upper);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the camel cased string.
     * @example
     *
     * _.camelCase('Foo Bar');
     * // => 'fooBar'
     *
     * _.camelCase('--foo-bar--');
     * // => 'fooBar'
     *
     * _.camelCase('__FOO_BAR__');
     * // => 'fooBar'
     */
    var camelCase = createCompounder(function(result, word, index) {
      word = word.toLowerCase();
      return result + (index ? capitalize(word) : word);
    });

    /**
     * Converts the first character of `string` to upper case and the remaining
     * to lower case.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to capitalize.
     * @returns {string} Returns the capitalized string.
     * @example
     *
     * _.capitalize('FRED');
     * // => 'Fred'
     */
    function capitalize(string) {
      return upperFirst(toString(string).toLowerCase());
    }

    /**
     * Deburrs `string` by converting
     * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
     * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
     * letters to basic Latin letters and removing
     * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to deburr.
     * @returns {string} Returns the deburred string.
     * @example
     *
     * _.deburr('déjà vu');
     * // => 'deja vu'
     */
    function deburr(string) {
      string = toString(string);
      return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
    }

    /**
     * Checks if `string` ends with the given target string.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {string} [target] The string to search for.
     * @param {number} [position=string.length] The position to search up to.
     * @returns {boolean} Returns `true` if `string` ends with `target`,
     *  else `false`.
     * @example
     *
     * _.endsWith('abc', 'c');
     * // => true
     *
     * _.endsWith('abc', 'b');
     * // => false
     *
     * _.endsWith('abc', 'b', 2);
     * // => true
     */
    function endsWith(string, target, position) {
      string = toString(string);
      target = baseToString(target);

      var length = string.length;
      position = position === undefined
        ? length
        : baseClamp(toInteger(position), 0, length);

      var end = position;
      position -= target.length;
      return position >= 0 && string.slice(position, end) == target;
    }

    /**
     * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
     * corresponding HTML entities.
     *
     * **Note:** No other characters are escaped. To escape additional
     * characters use a third-party library like [_he_](https://mths.be/he).
     *
     * Though the ">" character is escaped for symmetry, characters like
     * ">" and "/" don't need escaping in HTML and have no special meaning
     * unless they're part of a tag or unquoted attribute value. See
     * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
     * (under "semi-related fun fact") for more details.
     *
     * When working with HTML you should always
     * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
     * XSS vectors.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escape('fred, barney, & pebbles');
     * // => 'fred, barney, &amp; pebbles'
     */
    function escape(string) {
      string = toString(string);
      return (string && reHasUnescapedHtml.test(string))
        ? string.replace(reUnescapedHtml, escapeHtmlChar)
        : string;
    }

    /**
     * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
     * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escapeRegExp('[lodash](https://lodash.com/)');
     * // => '\[lodash\]\(https://lodash\.com/\)'
     */
    function escapeRegExp(string) {
      string = toString(string);
      return (string && reHasRegExpChar.test(string))
        ? string.replace(reRegExpChar, '\\$&')
        : string;
    }

    /**
     * Converts `string` to
     * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the kebab cased string.
     * @example
     *
     * _.kebabCase('Foo Bar');
     * // => 'foo-bar'
     *
     * _.kebabCase('fooBar');
     * // => 'foo-bar'
     *
     * _.kebabCase('__FOO_BAR__');
     * // => 'foo-bar'
     */
    var kebabCase = createCompounder(function(result, word, index) {
      return result + (index ? '-' : '') + word.toLowerCase();
    });

    /**
     * Converts `string`, as space separated words, to lower case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the lower cased string.
     * @example
     *
     * _.lowerCase('--Foo-Bar--');
     * // => 'foo bar'
     *
     * _.lowerCase('fooBar');
     * // => 'foo bar'
     *
     * _.lowerCase('__FOO_BAR__');
     * // => 'foo bar'
     */
    var lowerCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + word.toLowerCase();
    });

    /**
     * Converts the first character of `string` to lower case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the converted string.
     * @example
     *
     * _.lowerFirst('Fred');
     * // => 'fred'
     *
     * _.lowerFirst('FRED');
     * // => 'fRED'
     */
    var lowerFirst = createCaseFirst('toLowerCase');

    /**
     * Pads `string` on the left and right sides if it's shorter than `length`.
     * Padding characters are truncated if they can't be evenly divided by `length`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.pad('abc', 8);
     * // => '  abc   '
     *
     * _.pad('abc', 8, '_-');
     * // => '_-abc_-_'
     *
     * _.pad('abc', 3);
     * // => 'abc'
     */
    function pad(string, length, chars) {
      string = toString(string);
      length = toInteger(length);

      var strLength = length ? stringSize(string) : 0;
      if (!length || strLength >= length) {
        return string;
      }
      var mid = (length - strLength) / 2;
      return (
        createPadding(nativeFloor(mid), chars) +
        string +
        createPadding(nativeCeil(mid), chars)
      );
    }

    /**
     * Pads `string` on the right side if it's shorter than `length`. Padding
     * characters are truncated if they exceed `length`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.padEnd('abc', 6);
     * // => 'abc   '
     *
     * _.padEnd('abc', 6, '_-');
     * // => 'abc_-_'
     *
     * _.padEnd('abc', 3);
     * // => 'abc'
     */
    function padEnd(string, length, chars) {
      string = toString(string);
      length = toInteger(length);

      var strLength = length ? stringSize(string) : 0;
      return (length && strLength < length)
        ? (string + createPadding(length - strLength, chars))
        : string;
    }

    /**
     * Pads `string` on the left side if it's shorter than `length`. Padding
     * characters are truncated if they exceed `length`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.padStart('abc', 6);
     * // => '   abc'
     *
     * _.padStart('abc', 6, '_-');
     * // => '_-_abc'
     *
     * _.padStart('abc', 3);
     * // => 'abc'
     */
    function padStart(string, length, chars) {
      string = toString(string);
      length = toInteger(length);

      var strLength = length ? stringSize(string) : 0;
      return (length && strLength < length)
        ? (createPadding(length - strLength, chars) + string)
        : string;
    }

    /**
     * Converts `string` to an integer of the specified radix. If `radix` is
     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
     * hexadecimal, in which case a `radix` of `16` is used.
     *
     * **Note:** This method aligns with the
     * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category String
     * @param {string} string The string to convert.
     * @param {number} [radix=10] The radix to interpret `value` by.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.parseInt('08');
     * // => 8
     *
     * _.map(['6', '08', '10'], _.parseInt);
     * // => [6, 8, 10]
     */
    function parseInt(string, radix, guard) {
      if (guard || radix == null) {
        radix = 0;
      } else if (radix) {
        radix = +radix;
      }
      return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
    }

    /**
     * Repeats the given string `n` times.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to repeat.
     * @param {number} [n=1] The number of times to repeat the string.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the repeated string.
     * @example
     *
     * _.repeat('*', 3);
     * // => '***'
     *
     * _.repeat('abc', 2);
     * // => 'abcabc'
     *
     * _.repeat('abc', 0);
     * // => ''
     */
    function repeat(string, n, guard) {
      if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
        n = 1;
      } else {
        n = toInteger(n);
      }
      return baseRepeat(toString(string), n);
    }

    /**
     * Replaces matches for `pattern` in `string` with `replacement`.
     *
     * **Note:** This method is based on
     * [`String#replace`](https://mdn.io/String/replace).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to modify.
     * @param {RegExp|string} pattern The pattern to replace.
     * @param {Function|string} replacement The match replacement.
     * @returns {string} Returns the modified string.
     * @example
     *
     * _.replace('Hi Fred', 'Fred', 'Barney');
     * // => 'Hi Barney'
     */
    function replace() {
      var args = arguments,
          string = toString(args[0]);

      return args.length < 3 ? string : string.replace(args[1], args[2]);
    }

    /**
     * Converts `string` to
     * [snake case](https://en.wikipedia.org/wiki/Snake_case).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the snake cased string.
     * @example
     *
     * _.snakeCase('Foo Bar');
     * // => 'foo_bar'
     *
     * _.snakeCase('fooBar');
     * // => 'foo_bar'
     *
     * _.snakeCase('--FOO-BAR--');
     * // => 'foo_bar'
     */
    var snakeCase = createCompounder(function(result, word, index) {
      return result + (index ? '_' : '') + word.toLowerCase();
    });

    /**
     * Splits `string` by `separator`.
     *
     * **Note:** This method is based on
     * [`String#split`](https://mdn.io/String/split).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to split.
     * @param {RegExp|string} separator The separator pattern to split by.
     * @param {number} [limit] The length to truncate results to.
     * @returns {Array} Returns the string segments.
     * @example
     *
     * _.split('a-b-c', '-', 2);
     * // => ['a', 'b']
     */
    function split(string, separator, limit) {
      if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
        separator = limit = undefined;
      }
      limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
      if (!limit) {
        return [];
      }
      string = toString(string);
      if (string && (
            typeof separator == 'string' ||
            (separator != null && !isRegExp(separator))
          )) {
        separator = baseToString(separator);
        if (!separator && hasUnicode(string)) {
          return castSlice(stringToArray(string), 0, limit);
        }
      }
      return string.split(separator, limit);
    }

    /**
     * Converts `string` to
     * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
     *
     * @static
     * @memberOf _
     * @since 3.1.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the start cased string.
     * @example
     *
     * _.startCase('--foo-bar--');
     * // => 'Foo Bar'
     *
     * _.startCase('fooBar');
     * // => 'Foo Bar'
     *
     * _.startCase('__FOO_BAR__');
     * // => 'FOO BAR'
     */
    var startCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + upperFirst(word);
    });

    /**
     * Checks if `string` starts with the given target string.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {string} [target] The string to search for.
     * @param {number} [position=0] The position to search from.
     * @returns {boolean} Returns `true` if `string` starts with `target`,
     *  else `false`.
     * @example
     *
     * _.startsWith('abc', 'a');
     * // => true
     *
     * _.startsWith('abc', 'b');
     * // => false
     *
     * _.startsWith('abc', 'b', 1);
     * // => true
     */
    function startsWith(string, target, position) {
      string = toString(string);
      position = position == null
        ? 0
        : baseClamp(toInteger(position), 0, string.length);

      target = baseToString(target);
      return string.slice(position, position + target.length) == target;
    }

    /**
     * Creates a compiled template function that can interpolate data properties
     * in "interpolate" delimiters, HTML-escape interpolated data properties in
     * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
     * properties may be accessed as free variables in the template. If a setting
     * object is given, it takes precedence over `_.templateSettings` values.
     *
     * **Note:** In the development build `_.template` utilizes
     * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
     * for easier debugging.
     *
     * For more information on precompiling templates see
     * [lodash's custom builds documentation](https://lodash.com/custom-builds).
     *
     * For more information on Chrome extension sandboxes see
     * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category String
     * @param {string} [string=''] The template string.
     * @param {Object} [options={}] The options object.
     * @param {RegExp} [options.escape=_.templateSettings.escape]
     *  The HTML "escape" delimiter.
     * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
     *  The "evaluate" delimiter.
     * @param {Object} [options.imports=_.templateSettings.imports]
     *  An object to import into the template as free variables.
     * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
     *  The "interpolate" delimiter.
     * @param {string} [options.sourceURL='lodash.templateSources[n]']
     *  The sourceURL of the compiled template.
     * @param {string} [options.variable='obj']
     *  The data object variable name.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the compiled template function.
     * @example
     *
     * // Use the "interpolate" delimiter to create a compiled template.
     * var compiled = _.template('hello <%= user %>!');
     * compiled({ 'user': 'fred' });
     * // => 'hello fred!'
     *
     * // Use the HTML "escape" delimiter to escape data property values.
     * var compiled = _.template('<b><%- value %></b>');
     * compiled({ 'value': '<script>' });
     * // => '<b>&lt;script&gt;</b>'
     *
     * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
     * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
     * compiled({ 'users': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // Use the internal `print` function in "evaluate" delimiters.
     * var compiled = _.template('<% print("hello " + user); %>!');
     * compiled({ 'user': 'barney' });
     * // => 'hello barney!'
     *
     * // Use the ES template literal delimiter as an "interpolate" delimiter.
     * // Disable support by replacing the "interpolate" delimiter.
     * var compiled = _.template('hello ${ user }!');
     * compiled({ 'user': 'pebbles' });
     * // => 'hello pebbles!'
     *
     * // Use backslashes to treat delimiters as plain text.
     * var compiled = _.template('<%= "\\<%- value %\\>" %>');
     * compiled({ 'value': 'ignored' });
     * // => '<%- value %>'
     *
     * // Use the `imports` option to import `jQuery` as `jq`.
     * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
     * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
     * compiled({ 'users': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // Use the `sourceURL` option to specify a custom sourceURL for the template.
     * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
     * compiled(data);
     * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
     *
     * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
     * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
     * compiled.source;
     * // => function(data) {
     * //   var __t, __p = '';
     * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
     * //   return __p;
     * // }
     *
     * // Use custom template delimiters.
     * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
     * var compiled = _.template('hello {{ user }}!');
     * compiled({ 'user': 'mustache' });
     * // => 'hello mustache!'
     *
     * // Use the `source` property to inline compiled templates for meaningful
     * // line numbers in error messages and stack traces.
     * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
     *   var JST = {\
     *     "main": ' + _.template(mainText).source + '\
     *   };\
     * ');
     */
    function template(string, options, guard) {
      // Based on John Resig's `tmpl` implementation
      // (http://ejohn.org/blog/javascript-micro-templating/)
      // and Laura Doktorova's doT.js (https://github.com/olado/doT).
      var settings = lodash.templateSettings;

      if (guard && isIterateeCall(string, options, guard)) {
        options = undefined;
      }
      string = toString(string);
      options = assignInWith({}, options, settings, customDefaultsAssignIn);

      var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
          importsKeys = keys(imports),
          importsValues = baseValues(imports, importsKeys);

      var isEscaping,
          isEvaluating,
          index = 0,
          interpolate = options.interpolate || reNoMatch,
          source = "__p += '";

      // Compile the regexp to match each delimiter.
      var reDelimiters = RegExp(
        (options.escape || reNoMatch).source + '|' +
        interpolate.source + '|' +
        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
        (options.evaluate || reNoMatch).source + '|$'
      , 'g');

      // Use a sourceURL for easier debugging.
      // The sourceURL gets injected into the source that's eval-ed, so be careful
      // with lookup (in case of e.g. prototype pollution), and strip newlines if any.
      // A newline wouldn't be a valid sourceURL anyway, and it'd enable code injection.
      var sourceURL = '//# sourceURL=' +
        (hasOwnProperty.call(options, 'sourceURL')
          ? (options.sourceURL + '').replace(/[\r\n]/g, ' ')
          : ('lodash.templateSources[' + (++templateCounter) + ']')
        ) + '\n';

      string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
        interpolateValue || (interpolateValue = esTemplateValue);

        // Escape characters that can't be included in string literals.
        source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);

        // Replace delimiters with snippets.
        if (escapeValue) {
          isEscaping = true;
          source += "' +\n__e(" + escapeValue + ") +\n'";
        }
        if (evaluateValue) {
          isEvaluating = true;
          source += "';\n" + evaluateValue + ";\n__p += '";
        }
        if (interpolateValue) {
          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
        }
        index = offset + match.length;

        // The JS engine embedded in Adobe products needs `match` returned in
        // order to produce the correct `offset` value.
        return match;
      });

      source += "';\n";

      // If `variable` is not specified wrap a with-statement around the generated
      // code to add the data object to the top of the scope chain.
      // Like with sourceURL, we take care to not check the option's prototype,
      // as this configuration is a code injection vector.
      var variable = hasOwnProperty.call(options, 'variable') && options.variable;
      if (!variable) {
        source = 'with (obj) {\n' + source + '\n}\n';
      }
      // Cleanup code by stripping empty strings.
      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
        .replace(reEmptyStringMiddle, '$1')
        .replace(reEmptyStringTrailing, '$1;');

      // Frame code as the function body.
      source = 'function(' + (variable || 'obj') + ') {\n' +
        (variable
          ? ''
          : 'obj || (obj = {});\n'
        ) +
        "var __t, __p = ''" +
        (isEscaping
           ? ', __e = _.escape'
           : ''
        ) +
        (isEvaluating
          ? ', __j = Array.prototype.join;\n' +
            "function print() { __p += __j.call(arguments, '') }\n"
          : ';\n'
        ) +
        source +
        'return __p\n}';

      var result = attempt(function() {
        return Function(importsKeys, sourceURL + 'return ' + source)
          .apply(undefined, importsValues);
      });

      // Provide the compiled function's source by its `toString` method or
      // the `source` property as a convenience for inlining compiled templates.
      result.source = source;
      if (isError(result)) {
        throw result;
      }
      return result;
    }

    /**
     * Converts `string`, as a whole, to lower case just like
     * [String#toLowerCase](https://mdn.io/toLowerCase).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the lower cased string.
     * @example
     *
     * _.toLower('--Foo-Bar--');
     * // => '--foo-bar--'
     *
     * _.toLower('fooBar');
     * // => 'foobar'
     *
     * _.toLower('__FOO_BAR__');
     * // => '__foo_bar__'
     */
    function toLower(value) {
      return toString(value).toLowerCase();
    }

    /**
     * Converts `string`, as a whole, to upper case just like
     * [String#toUpperCase](https://mdn.io/toUpperCase).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the upper cased string.
     * @example
     *
     * _.toUpper('--foo-bar--');
     * // => '--FOO-BAR--'
     *
     * _.toUpper('fooBar');
     * // => 'FOOBAR'
     *
     * _.toUpper('__foo_bar__');
     * // => '__FOO_BAR__'
     */
    function toUpper(value) {
      return toString(value).toUpperCase();
    }

    /**
     * Removes leading and trailing whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trim('  abc  ');
     * // => 'abc'
     *
     * _.trim('-_-abc-_-', '_-');
     * // => 'abc'
     *
     * _.map(['  foo  ', '  bar  '], _.trim);
     * // => ['foo', 'bar']
     */
    function trim(string, chars, guard) {
      string = toString(string);
      if (string && (guard || chars === undefined)) {
        return string.replace(reTrim, '');
      }
      if (!string || !(chars = baseToString(chars))) {
        return string;
      }
      var strSymbols = stringToArray(string),
          chrSymbols = stringToArray(chars),
          start = charsStartIndex(strSymbols, chrSymbols),
          end = charsEndIndex(strSymbols, chrSymbols) + 1;

      return castSlice(strSymbols, start, end).join('');
    }

    /**
     * Removes trailing whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trimEnd('  abc  ');
     * // => '  abc'
     *
     * _.trimEnd('-_-abc-_-', '_-');
     * // => '-_-abc'
     */
    function trimEnd(string, chars, guard) {
      string = toString(string);
      if (string && (guard || chars === undefined)) {
        return string.replace(reTrimEnd, '');
      }
      if (!string || !(chars = baseToString(chars))) {
        return string;
      }
      var strSymbols = stringToArray(string),
          end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;

      return castSlice(strSymbols, 0, end).join('');
    }

    /**
     * Removes leading whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trimStart('  abc  ');
     * // => 'abc  '
     *
     * _.trimStart('-_-abc-_-', '_-');
     * // => 'abc-_-'
     */
    function trimStart(string, chars, guard) {
      string = toString(string);
      if (string && (guard || chars === undefined)) {
        return string.replace(reTrimStart, '');
      }
      if (!string || !(chars = baseToString(chars))) {
        return string;
      }
      var strSymbols = stringToArray(string),
          start = charsStartIndex(strSymbols, stringToArray(chars));

      return castSlice(strSymbols, start).join('');
    }

    /**
     * Truncates `string` if it's longer than the given maximum string length.
     * The last characters of the truncated string are replaced with the omission
     * string which defaults to "...".
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to truncate.
     * @param {Object} [options={}] The options object.
     * @param {number} [options.length=30] The maximum string length.
     * @param {string} [options.omission='...'] The string to indicate text is omitted.
     * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
     * @returns {string} Returns the truncated string.
     * @example
     *
     * _.truncate('hi-diddly-ho there, neighborino');
     * // => 'hi-diddly-ho there, neighbo...'
     *
     * _.truncate('hi-diddly-ho there, neighborino', {
     *   'length': 24,
     *   'separator': ' '
     * });
     * // => 'hi-diddly-ho there,...'
     *
     * _.truncate('hi-diddly-ho there, neighborino', {
     *   'length': 24,
     *   'separator': /,? +/
     * });
     * // => 'hi-diddly-ho there...'
     *
     * _.truncate('hi-diddly-ho there, neighborino', {
     *   'omission': ' [...]'
     * });
     * // => 'hi-diddly-ho there, neig [...]'
     */
    function truncate(string, options) {
      var length = DEFAULT_TRUNC_LENGTH,
          omission = DEFAULT_TRUNC_OMISSION;

      if (isObject(options)) {
        var separator = 'separator' in options ? options.separator : separator;
        length = 'length' in options ? toInteger(options.length) : length;
        omission = 'omission' in options ? baseToString(options.omission) : omission;
      }
      string = toString(string);

      var strLength = string.length;
      if (hasUnicode(string)) {
        var strSymbols = stringToArray(string);
        strLength = strSymbols.length;
      }
      if (length >= strLength) {
        return string;
      }
      var end = length - stringSize(omission);
      if (end < 1) {
        return omission;
      }
      var result = strSymbols
        ? castSlice(strSymbols, 0, end).join('')
        : string.slice(0, end);

      if (separator === undefined) {
        return result + omission;
      }
      if (strSymbols) {
        end += (result.length - end);
      }
      if (isRegExp(separator)) {
        if (string.slice(end).search(separator)) {
          var match,
              substring = result;

          if (!separator.global) {
            separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
          }
          separator.lastIndex = 0;
          while ((match = separator.exec(substring))) {
            var newEnd = match.index;
          }
          result = result.slice(0, newEnd === undefined ? end : newEnd);
        }
      } else if (string.indexOf(baseToString(separator), end) != end) {
        var index = result.lastIndexOf(separator);
        if (index > -1) {
          result = result.slice(0, index);
        }
      }
      return result + omission;
    }

    /**
     * The inverse of `_.escape`; this method converts the HTML entities
     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
     * their corresponding characters.
     *
     * **Note:** No other HTML entities are unescaped. To unescape additional
     * HTML entities use a third-party library like [_he_](https://mths.be/he).
     *
     * @static
     * @memberOf _
     * @since 0.6.0
     * @category String
     * @param {string} [string=''] The string to unescape.
     * @returns {string} Returns the unescaped string.
     * @example
     *
     * _.unescape('fred, barney, &amp; pebbles');
     * // => 'fred, barney, & pebbles'
     */
    function unescape(string) {
      string = toString(string);
      return (string && reHasEscapedHtml.test(string))
        ? string.replace(reEscapedHtml, unescapeHtmlChar)
        : string;
    }

    /**
     * Converts `string`, as space separated words, to upper case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the upper cased string.
     * @example
     *
     * _.upperCase('--foo-bar');
     * // => 'FOO BAR'
     *
     * _.upperCase('fooBar');
     * // => 'FOO BAR'
     *
     * _.upperCase('__foo_bar__');
     * // => 'FOO BAR'
     */
    var upperCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + word.toUpperCase();
    });

    /**
     * Converts the first character of `string` to upper case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the converted string.
     * @example
     *
     * _.upperFirst('fred');
     * // => 'Fred'
     *
     * _.upperFirst('FRED');
     * // => 'FRED'
     */
    var upperFirst = createCaseFirst('toUpperCase');

    /**
     * Splits `string` into an array of its words.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {RegExp|string} [pattern] The pattern to match words.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the words of `string`.
     * @example
     *
     * _.words('fred, barney, & pebbles');
     * // => ['fred', 'barney', 'pebbles']
     *
     * _.words('fred, barney, & pebbles', /[^, ]+/g);
     * // => ['fred', 'barney', '&', 'pebbles']
     */
    function words(string, pattern, guard) {
      string = toString(string);
      pattern = guard ? undefined : pattern;

      if (pattern === undefined) {
        return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
      }
      return string.match(pattern) || [];
    }

    /*------------------------------------------------------------------------*/

    /**
     * Attempts to invoke `func`, returning either the result or the caught error
     * object. Any additional arguments are provided to `func` when it's invoked.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {Function} func The function to attempt.
     * @param {...*} [args] The arguments to invoke `func` with.
     * @returns {*} Returns the `func` result or error object.
     * @example
     *
     * // Avoid throwing errors for invalid selectors.
     * var elements = _.attempt(function(selector) {
     *   return document.querySelectorAll(selector);
     * }, '>_>');
     *
     * if (_.isError(elements)) {
     *   elements = [];
     * }
     */
    var attempt = baseRest(function(func, args) {
      try {
        return apply(func, undefined, args);
      } catch (e) {
        return isError(e) ? e : new Error(e);
      }
    });

    /**
     * Binds methods of an object to the object itself, overwriting the existing
     * method.
     *
     * **Note:** This method doesn't set the "length" property of bound functions.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {Object} object The object to bind and assign the bound methods to.
     * @param {...(string|string[])} methodNames The object method names to bind.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var view = {
     *   'label': 'docs',
     *   'click': function() {
     *     console.log('clicked ' + this.label);
     *   }
     * };
     *
     * _.bindAll(view, ['click']);
     * jQuery(element).on('click', view.click);
     * // => Logs 'clicked docs' when clicked.
     */
    var bindAll = flatRest(function(object, methodNames) {
      arrayEach(methodNames, function(key) {
        key = toKey(key);
        baseAssignValue(object, key, bind(object[key], object));
      });
      return object;
    });

    /**
     * Creates a function that iterates over `pairs` and invokes the corresponding
     * function of the first predicate to return truthy. The predicate-function
     * pairs are invoked with the `this` binding and arguments of the created
     * function.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {Array} pairs The predicate-function pairs.
     * @returns {Function} Returns the new composite function.
     * @example
     *
     * var func = _.cond([
     *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
     *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
     *   [_.stubTrue,                      _.constant('no match')]
     * ]);
     *
     * func({ 'a': 1, 'b': 2 });
     * // => 'matches A'
     *
     * func({ 'a': 0, 'b': 1 });
     * // => 'matches B'
     *
     * func({ 'a': '1', 'b': '2' });
     * // => 'no match'
     */
    function cond(pairs) {
      var length = pairs == null ? 0 : pairs.length,
          toIteratee = getIteratee();

      pairs = !length ? [] : arrayMap(pairs, function(pair) {
        if (typeof pair[1] != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        return [toIteratee(pair[0]), pair[1]];
      });

      return baseRest(function(args) {
        var index = -1;
        while (++index < length) {
          var pair = pairs[index];
          if (apply(pair[0], this, args)) {
            return apply(pair[1], this, args);
          }
        }
      });
    }

    /**
     * Creates a function that invokes the predicate properties of `source` with
     * the corresponding property values of a given object, returning `true` if
     * all predicates return truthy, else `false`.
     *
     * **Note:** The created function is equivalent to `_.conformsTo` with
     * `source` partially applied.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {Object} source The object of property predicates to conform to.
     * @returns {Function} Returns the new spec function.
     * @example
     *
     * var objects = [
     *   { 'a': 2, 'b': 1 },
     *   { 'a': 1, 'b': 2 }
     * ];
     *
     * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
     * // => [{ 'a': 1, 'b': 2 }]
     */
    function conforms(source) {
      return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that returns `value`.
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Util
     * @param {*} value The value to return from the new function.
     * @returns {Function} Returns the new constant function.
     * @example
     *
     * var objects = _.times(2, _.constant({ 'a': 1 }));
     *
     * console.log(objects);
     * // => [{ 'a': 1 }, { 'a': 1 }]
     *
     * console.log(objects[0] === objects[1]);
     * // => true
     */
    function constant(value) {
      return function() {
        return value;
      };
    }

    /**
     * Checks `value` to determine whether a default value should be returned in
     * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
     * or `undefined`.
     *
     * @static
     * @memberOf _
     * @since 4.14.0
     * @category Util
     * @param {*} value The value to check.
     * @param {*} defaultValue The default value.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * _.defaultTo(1, 10);
     * // => 1
     *
     * _.defaultTo(undefined, 10);
     * // => 10
     */
    function defaultTo(value, defaultValue) {
      return (value == null || value !== value) ? defaultValue : value;
    }

    /**
     * Creates a function that returns the result of invoking the given functions
     * with the `this` binding of the created function, where each successive
     * invocation is supplied the return value of the previous.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {...(Function|Function[])} [funcs] The functions to invoke.
     * @returns {Function} Returns the new composite function.
     * @see _.flowRight
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var addSquare = _.flow([_.add, square]);
     * addSquare(1, 2);
     * // => 9
     */
    var flow = createFlow();

    /**
     * This method is like `_.flow` except that it creates a function that
     * invokes the given functions from right to left.
     *
     * @static
     * @since 3.0.0
     * @memberOf _
     * @category Util
     * @param {...(Function|Function[])} [funcs] The functions to invoke.
     * @returns {Function} Returns the new composite function.
     * @see _.flow
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var addSquare = _.flowRight([square, _.add]);
     * addSquare(1, 2);
     * // => 9
     */
    var flowRight = createFlow(true);

    /**
     * This method returns the first argument it receives.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {*} value Any value.
     * @returns {*} Returns `value`.
     * @example
     *
     * var object = { 'a': 1 };
     *
     * console.log(_.identity(object) === object);
     * // => true
     */
    function identity(value) {
      return value;
    }

    /**
     * Creates a function that invokes `func` with the arguments of the created
     * function. If `func` is a property name, the created function returns the
     * property value for a given element. If `func` is an array or object, the
     * created function returns `true` for elements that contain the equivalent
     * source properties, otherwise it returns `false`.
     *
     * @static
     * @since 4.0.0
     * @memberOf _
     * @category Util
     * @param {*} [func=_.identity] The value to convert to a callback.
     * @returns {Function} Returns the callback.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * // The `_.matches` iteratee shorthand.
     * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
     * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.filter(users, _.iteratee(['user', 'fred']));
     * // => [{ 'user': 'fred', 'age': 40 }]
     *
     * // The `_.property` iteratee shorthand.
     * _.map(users, _.iteratee('user'));
     * // => ['barney', 'fred']
     *
     * // Create custom iteratee shorthands.
     * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
     *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
     *     return func.test(string);
     *   };
     * });
     *
     * _.filter(['abc', 'def'], /ef/);
     * // => ['def']
     */
    function iteratee(func) {
      return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that performs a partial deep comparison between a given
     * object and `source`, returning `true` if the given object has equivalent
     * property values, else `false`.
     *
     * **Note:** The created function is equivalent to `_.isMatch` with `source`
     * partially applied.
     *
     * Partial comparisons will match empty array and empty object `source`
     * values against any array or object value, respectively. See `_.isEqual`
     * for a list of supported value comparisons.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {Object} source The object of property values to match.
     * @returns {Function} Returns the new spec function.
     * @example
     *
     * var objects = [
     *   { 'a': 1, 'b': 2, 'c': 3 },
     *   { 'a': 4, 'b': 5, 'c': 6 }
     * ];
     *
     * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
     * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
     */
    function matches(source) {
      return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that performs a partial deep comparison between the
     * value at `path` of a given object to `srcValue`, returning `true` if the
     * object value is equivalent, else `false`.
     *
     * **Note:** Partial comparisons will match empty array and empty object
     * `srcValue` values against any array or object value, respectively. See
     * `_.isEqual` for a list of supported value comparisons.
     *
     * @static
     * @memberOf _
     * @since 3.2.0
     * @category Util
     * @param {Array|string} path The path of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new spec function.
     * @example
     *
     * var objects = [
     *   { 'a': 1, 'b': 2, 'c': 3 },
     *   { 'a': 4, 'b': 5, 'c': 6 }
     * ];
     *
     * _.find(objects, _.matchesProperty('a', 4));
     * // => { 'a': 4, 'b': 5, 'c': 6 }
     */
    function matchesProperty(path, srcValue) {
      return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that invokes the method at `path` of a given object.
     * Any additional arguments are provided to the invoked method.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Util
     * @param {Array|string} path The path of the method to invoke.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Function} Returns the new invoker function.
     * @example
     *
     * var objects = [
     *   { 'a': { 'b': _.constant(2) } },
     *   { 'a': { 'b': _.constant(1) } }
     * ];
     *
     * _.map(objects, _.method('a.b'));
     * // => [2, 1]
     *
     * _.map(objects, _.method(['a', 'b']));
     * // => [2, 1]
     */
    var method = baseRest(function(path, args) {
      return function(object) {
        return baseInvoke(object, path, args);
      };
    });

    /**
     * The opposite of `_.method`; this method creates a function that invokes
     * the method at a given path of `object`. Any additional arguments are
     * provided to the invoked method.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Util
     * @param {Object} object The object to query.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Function} Returns the new invoker function.
     * @example
     *
     * var array = _.times(3, _.constant),
     *     object = { 'a': array, 'b': array, 'c': array };
     *
     * _.map(['a[2]', 'c[0]'], _.methodOf(object));
     * // => [2, 0]
     *
     * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
     * // => [2, 0]
     */
    var methodOf = baseRest(function(object, args) {
      return function(path) {
        return baseInvoke(object, path, args);
      };
    });

    /**
     * Adds all own enumerable string keyed function properties of a source
     * object to the destination object. If `object` is a function, then methods
     * are added to its prototype as well.
     *
     * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
     * avoid conflicts caused by modifying the original.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {Function|Object} [object=lodash] The destination object.
     * @param {Object} source The object of functions to add.
     * @param {Object} [options={}] The options object.
     * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
     * @returns {Function|Object} Returns `object`.
     * @example
     *
     * function vowels(string) {
     *   return _.filter(string, function(v) {
     *     return /[aeiou]/i.test(v);
     *   });
     * }
     *
     * _.mixin({ 'vowels': vowels });
     * _.vowels('fred');
     * // => ['e']
     *
     * _('fred').vowels().value();
     * // => ['e']
     *
     * _.mixin({ 'vowels': vowels }, { 'chain': false });
     * _('fred').vowels();
     * // => ['e']
     */
    function mixin(object, source, options) {
      var props = keys(source),
          methodNames = baseFunctions(source, props);

      if (options == null &&
          !(isObject(source) && (methodNames.length || !props.length))) {
        options = source;
        source = object;
        object = this;
        methodNames = baseFunctions(source, keys(source));
      }
      var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
          isFunc = isFunction(object);

      arrayEach(methodNames, function(methodName) {
        var func = source[methodName];
        object[methodName] = func;
        if (isFunc) {
          object.prototype[methodName] = function() {
            var chainAll = this.__chain__;
            if (chain || chainAll) {
              var result = object(this.__wrapped__),
                  actions = result.__actions__ = copyArray(this.__actions__);

              actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
              result.__chain__ = chainAll;
              return result;
            }
            return func.apply(object, arrayPush([this.value()], arguments));
          };
        }
      });

      return object;
    }

    /**
     * Reverts the `_` variable to its previous value and returns a reference to
     * the `lodash` function.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @returns {Function} Returns the `lodash` function.
     * @example
     *
     * var lodash = _.noConflict();
     */
    function noConflict() {
      if (root._ === this) {
        root._ = oldDash;
      }
      return this;
    }

    /**
     * This method returns `undefined`.
     *
     * @static
     * @memberOf _
     * @since 2.3.0
     * @category Util
     * @example
     *
     * _.times(2, _.noop);
     * // => [undefined, undefined]
     */
    function noop() {
      // No operation performed.
    }

    /**
     * Creates a function that gets the argument at index `n`. If `n` is negative,
     * the nth argument from the end is returned.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {number} [n=0] The index of the argument to return.
     * @returns {Function} Returns the new pass-thru function.
     * @example
     *
     * var func = _.nthArg(1);
     * func('a', 'b', 'c', 'd');
     * // => 'b'
     *
     * var func = _.nthArg(-2);
     * func('a', 'b', 'c', 'd');
     * // => 'c'
     */
    function nthArg(n) {
      n = toInteger(n);
      return baseRest(function(args) {
        return baseNth(args, n);
      });
    }

    /**
     * Creates a function that invokes `iteratees` with the arguments it receives
     * and returns their results.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {...(Function|Function[])} [iteratees=[_.identity]]
     *  The iteratees to invoke.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var func = _.over([Math.max, Math.min]);
     *
     * func(1, 2, 3, 4);
     * // => [4, 1]
     */
    var over = createOver(arrayMap);

    /**
     * Creates a function that checks if **all** of the `predicates` return
     * truthy when invoked with the arguments it receives.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {...(Function|Function[])} [predicates=[_.identity]]
     *  The predicates to check.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var func = _.overEvery([Boolean, isFinite]);
     *
     * func('1');
     * // => true
     *
     * func(null);
     * // => false
     *
     * func(NaN);
     * // => false
     */
    var overEvery = createOver(arrayEvery);

    /**
     * Creates a function that checks if **any** of the `predicates` return
     * truthy when invoked with the arguments it receives.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {...(Function|Function[])} [predicates=[_.identity]]
     *  The predicates to check.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var func = _.overSome([Boolean, isFinite]);
     *
     * func('1');
     * // => true
     *
     * func(null);
     * // => true
     *
     * func(NaN);
     * // => false
     */
    var overSome = createOver(arraySome);

    /**
     * Creates a function that returns the value at `path` of a given object.
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Util
     * @param {Array|string} path The path of the property to get.
     * @returns {Function} Returns the new accessor function.
     * @example
     *
     * var objects = [
     *   { 'a': { 'b': 2 } },
     *   { 'a': { 'b': 1 } }
     * ];
     *
     * _.map(objects, _.property('a.b'));
     * // => [2, 1]
     *
     * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
     * // => [1, 2]
     */
    function property(path) {
      return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
    }

    /**
     * The opposite of `_.property`; this method creates a function that returns
     * the value at a given path of `object`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {Object} object The object to query.
     * @returns {Function} Returns the new accessor function.
     * @example
     *
     * var array = [0, 1, 2],
     *     object = { 'a': array, 'b': array, 'c': array };
     *
     * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
     * // => [2, 0]
     *
     * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
     * // => [2, 0]
     */
    function propertyOf(object) {
      return function(path) {
        return object == null ? undefined : baseGet(object, path);
      };
    }

    /**
     * Creates an array of numbers (positive and/or negative) progressing from
     * `start` up to, but not including, `end`. A step of `-1` is used if a negative
     * `start` is specified without an `end` or `step`. If `end` is not specified,
     * it's set to `start` with `start` then set to `0`.
     *
     * **Note:** JavaScript follows the IEEE-754 standard for resolving
     * floating-point values which can produce unexpected results.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns the range of numbers.
     * @see _.inRange, _.rangeRight
     * @example
     *
     * _.range(4);
     * // => [0, 1, 2, 3]
     *
     * _.range(-4);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 5);
     * // => [1, 2, 3, 4]
     *
     * _.range(0, 20, 5);
     * // => [0, 5, 10, 15]
     *
     * _.range(0, -4, -1);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.range(0);
     * // => []
     */
    var range = createRange();

    /**
     * This method is like `_.range` except that it populates values in
     * descending order.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns the range of numbers.
     * @see _.inRange, _.range
     * @example
     *
     * _.rangeRight(4);
     * // => [3, 2, 1, 0]
     *
     * _.rangeRight(-4);
     * // => [-3, -2, -1, 0]
     *
     * _.rangeRight(1, 5);
     * // => [4, 3, 2, 1]
     *
     * _.rangeRight(0, 20, 5);
     * // => [15, 10, 5, 0]
     *
     * _.rangeRight(0, -4, -1);
     * // => [-3, -2, -1, 0]
     *
     * _.rangeRight(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.rangeRight(0);
     * // => []
     */
    var rangeRight = createRange(true);

    /**
     * This method returns a new empty array.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {Array} Returns the new empty array.
     * @example
     *
     * var arrays = _.times(2, _.stubArray);
     *
     * console.log(arrays);
     * // => [[], []]
     *
     * console.log(arrays[0] === arrays[1]);
     * // => false
     */
    function stubArray() {
      return [];
    }

    /**
     * This method returns `false`.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {boolean} Returns `false`.
     * @example
     *
     * _.times(2, _.stubFalse);
     * // => [false, false]
     */
    function stubFalse() {
      return false;
    }

    /**
     * This method returns a new empty object.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {Object} Returns the new empty object.
     * @example
     *
     * var objects = _.times(2, _.stubObject);
     *
     * console.log(objects);
     * // => [{}, {}]
     *
     * console.log(objects[0] === objects[1]);
     * // => false
     */
    function stubObject() {
      return {};
    }

    /**
     * This method returns an empty string.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {string} Returns the empty string.
     * @example
     *
     * _.times(2, _.stubString);
     * // => ['', '']
     */
    function stubString() {
      return '';
    }

    /**
     * This method returns `true`.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {boolean} Returns `true`.
     * @example
     *
     * _.times(2, _.stubTrue);
     * // => [true, true]
     */
    function stubTrue() {
      return true;
    }

    /**
     * Invokes the iteratee `n` times, returning an array of the results of
     * each invocation. The iteratee is invoked with one argument; (index).
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {number} n The number of times to invoke `iteratee`.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the array of results.
     * @example
     *
     * _.times(3, String);
     * // => ['0', '1', '2']
     *
     *  _.times(4, _.constant(0));
     * // => [0, 0, 0, 0]
     */
    function times(n, iteratee) {
      n = toInteger(n);
      if (n < 1 || n > MAX_SAFE_INTEGER) {
        return [];
      }
      var index = MAX_ARRAY_LENGTH,
          length = nativeMin(n, MAX_ARRAY_LENGTH);

      iteratee = getIteratee(iteratee);
      n -= MAX_ARRAY_LENGTH;

      var result = baseTimes(length, iteratee);
      while (++index < n) {
        iteratee(index);
      }
      return result;
    }

    /**
     * Converts `value` to a property path array.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {*} value The value to convert.
     * @returns {Array} Returns the new property path array.
     * @example
     *
     * _.toPath('a.b.c');
     * // => ['a', 'b', 'c']
     *
     * _.toPath('a[0].b.c');
     * // => ['a', '0', 'b', 'c']
     */
    function toPath(value) {
      if (isArray(value)) {
        return arrayMap(value, toKey);
      }
      return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
    }

    /**
     * Generates a unique ID. If `prefix` is given, the ID is appended to it.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {string} [prefix=''] The value to prefix the ID with.
     * @returns {string} Returns the unique ID.
     * @example
     *
     * _.uniqueId('contact_');
     * // => 'contact_104'
     *
     * _.uniqueId();
     * // => '105'
     */
    function uniqueId(prefix) {
      var id = ++idCounter;
      return toString(prefix) + id;
    }

    /*------------------------------------------------------------------------*/

    /**
     * Adds two numbers.
     *
     * @static
     * @memberOf _
     * @since 3.4.0
     * @category Math
     * @param {number} augend The first number in an addition.
     * @param {number} addend The second number in an addition.
     * @returns {number} Returns the total.
     * @example
     *
     * _.add(6, 4);
     * // => 10
     */
    var add = createMathOperation(function(augend, addend) {
      return augend + addend;
    }, 0);

    /**
     * Computes `number` rounded up to `precision`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Math
     * @param {number} number The number to round up.
     * @param {number} [precision=0] The precision to round up to.
     * @returns {number} Returns the rounded up number.
     * @example
     *
     * _.ceil(4.006);
     * // => 5
     *
     * _.ceil(6.004, 2);
     * // => 6.01
     *
     * _.ceil(6040, -2);
     * // => 6100
     */
    var ceil = createRound('ceil');

    /**
     * Divide two numbers.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Math
     * @param {number} dividend The first number in a division.
     * @param {number} divisor The second number in a division.
     * @returns {number} Returns the quotient.
     * @example
     *
     * _.divide(6, 4);
     * // => 1.5
     */
    var divide = createMathOperation(function(dividend, divisor) {
      return dividend / divisor;
    }, 1);

    /**
     * Computes `number` rounded down to `precision`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Math
     * @param {number} number The number to round down.
     * @param {number} [precision=0] The precision to round down to.
     * @returns {number} Returns the rounded down number.
     * @example
     *
     * _.floor(4.006);
     * // => 4
     *
     * _.floor(0.046, 2);
     * // => 0.04
     *
     * _.floor(4060, -2);
     * // => 4000
     */
    var floor = createRound('floor');

    /**
     * Computes the maximum value of `array`. If `array` is empty or falsey,
     * `undefined` is returned.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * _.max([4, 2, 8, 6]);
     * // => 8
     *
     * _.max([]);
     * // => undefined
     */
    function max(array) {
      return (array && array.length)
        ? baseExtremum(array, identity, baseGt)
        : undefined;
    }

    /**
     * This method is like `_.max` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the criterion by which
     * the value is ranked. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * var objects = [{ 'n': 1 }, { 'n': 2 }];
     *
     * _.maxBy(objects, function(o) { return o.n; });
     * // => { 'n': 2 }
     *
     * // The `_.property` iteratee shorthand.
     * _.maxBy(objects, 'n');
     * // => { 'n': 2 }
     */
    function maxBy(array, iteratee) {
      return (array && array.length)
        ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
        : undefined;
    }

    /**
     * Computes the mean of the values in `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {number} Returns the mean.
     * @example
     *
     * _.mean([4, 2, 8, 6]);
     * // => 5
     */
    function mean(array) {
      return baseMean(array, identity);
    }

    /**
     * This method is like `_.mean` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the value to be averaged.
     * The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the mean.
     * @example
     *
     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
     *
     * _.meanBy(objects, function(o) { return o.n; });
     * // => 5
     *
     * // The `_.property` iteratee shorthand.
     * _.meanBy(objects, 'n');
     * // => 5
     */
    function meanBy(array, iteratee) {
      return baseMean(array, getIteratee(iteratee, 2));
    }

    /**
     * Computes the minimum value of `array`. If `array` is empty or falsey,
     * `undefined` is returned.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * _.min([4, 2, 8, 6]);
     * // => 2
     *
     * _.min([]);
     * // => undefined
     */
    function min(array) {
      return (array && array.length)
        ? baseExtremum(array, identity, baseLt)
        : undefined;
    }

    /**
     * This method is like `_.min` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the criterion by which
     * the value is ranked. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * var objects = [{ 'n': 1 }, { 'n': 2 }];
     *
     * _.minBy(objects, function(o) { return o.n; });
     * // => { 'n': 1 }
     *
     * // The `_.property` iteratee shorthand.
     * _.minBy(objects, 'n');
     * // => { 'n': 1 }
     */
    function minBy(array, iteratee) {
      return (array && array.length)
        ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
        : undefined;
    }

    /**
     * Multiply two numbers.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Math
     * @param {number} multiplier The first number in a multiplication.
     * @param {number} multiplicand The second number in a multiplication.
     * @returns {number} Returns the product.
     * @example
     *
     * _.multiply(6, 4);
     * // => 24
     */
    var multiply = createMathOperation(function(multiplier, multiplicand) {
      return multiplier * multiplicand;
    }, 1);

    /**
     * Computes `number` rounded to `precision`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Math
     * @param {number} number The number to round.
     * @param {number} [precision=0] The precision to round to.
     * @returns {number} Returns the rounded number.
     * @example
     *
     * _.round(4.006);
     * // => 4
     *
     * _.round(4.006, 2);
     * // => 4.01
     *
     * _.round(4060, -2);
     * // => 4100
     */
    var round = createRound('round');

    /**
     * Subtract two numbers.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {number} minuend The first number in a subtraction.
     * @param {number} subtrahend The second number in a subtraction.
     * @returns {number} Returns the difference.
     * @example
     *
     * _.subtract(6, 4);
     * // => 2
     */
    var subtract = createMathOperation(function(minuend, subtrahend) {
      return minuend - subtrahend;
    }, 0);

    /**
     * Computes the sum of the values in `array`.
     *
     * @static
     * @memberOf _
     * @since 3.4.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {number} Returns the sum.
     * @example
     *
     * _.sum([4, 2, 8, 6]);
     * // => 20
     */
    function sum(array) {
      return (array && array.length)
        ? baseSum(array, identity)
        : 0;
    }

    /**
     * This method is like `_.sum` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the value to be summed.
     * The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the sum.
     * @example
     *
     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
     *
     * _.sumBy(objects, function(o) { return o.n; });
     * // => 20
     *
     * // The `_.property` iteratee shorthand.
     * _.sumBy(objects, 'n');
     * // => 20
     */
    function sumBy(array, iteratee) {
      return (array && array.length)
        ? baseSum(array, getIteratee(iteratee, 2))
        : 0;
    }

    /*------------------------------------------------------------------------*/

    // Add methods that return wrapped values in chain sequences.
    lodash.after = after;
    lodash.ary = ary;
    lodash.assign = assign;
    lodash.assignIn = assignIn;
    lodash.assignInWith = assignInWith;
    lodash.assignWith = assignWith;
    lodash.at = at;
    lodash.before = before;
    lodash.bind = bind;
    lodash.bindAll = bindAll;
    lodash.bindKey = bindKey;
    lodash.castArray = castArray;
    lodash.chain = chain;
    lodash.chunk = chunk;
    lodash.compact = compact;
    lodash.concat = concat;
    lodash.cond = cond;
    lodash.conforms = conforms;
    lodash.constant = constant;
    lodash.countBy = countBy;
    lodash.create = create;
    lodash.curry = curry;
    lodash.curryRight = curryRight;
    lodash.debounce = debounce;
    lodash.defaults = defaults;
    lodash.defaultsDeep = defaultsDeep;
    lodash.defer = defer;
    lodash.delay = delay;
    lodash.difference = difference;
    lodash.differenceBy = differenceBy;
    lodash.differenceWith = differenceWith;
    lodash.drop = drop;
    lodash.dropRight = dropRight;
    lodash.dropRightWhile = dropRightWhile;
    lodash.dropWhile = dropWhile;
    lodash.fill = fill;
    lodash.filter = filter;
    lodash.flatMap = flatMap;
    lodash.flatMapDeep = flatMapDeep;
    lodash.flatMapDepth = flatMapDepth;
    lodash.flatten = flatten;
    lodash.flattenDeep = flattenDeep;
    lodash.flattenDepth = flattenDepth;
    lodash.flip = flip;
    lodash.flow = flow;
    lodash.flowRight = flowRight;
    lodash.fromPairs = fromPairs;
    lodash.functions = functions;
    lodash.functionsIn = functionsIn;
    lodash.groupBy = groupBy;
    lodash.initial = initial;
    lodash.intersection = intersection;
    lodash.intersectionBy = intersectionBy;
    lodash.intersectionWith = intersectionWith;
    lodash.invert = invert;
    lodash.invertBy = invertBy;
    lodash.invokeMap = invokeMap;
    lodash.iteratee = iteratee;
    lodash.keyBy = keyBy;
    lodash.keys = keys;
    lodash.keysIn = keysIn;
    lodash.map = map;
    lodash.mapKeys = mapKeys;
    lodash.mapValues = mapValues;
    lodash.matches = matches;
    lodash.matchesProperty = matchesProperty;
    lodash.memoize = memoize;
    lodash.merge = merge;
    lodash.mergeWith = mergeWith;
    lodash.method = method;
    lodash.methodOf = methodOf;
    lodash.mixin = mixin;
    lodash.negate = negate;
    lodash.nthArg = nthArg;
    lodash.omit = omit;
    lodash.omitBy = omitBy;
    lodash.once = once;
    lodash.orderBy = orderBy;
    lodash.over = over;
    lodash.overArgs = overArgs;
    lodash.overEvery = overEvery;
    lodash.overSome = overSome;
    lodash.partial = partial;
    lodash.partialRight = partialRight;
    lodash.partition = partition;
    lodash.pick = pick;
    lodash.pickBy = pickBy;
    lodash.property = property;
    lodash.propertyOf = propertyOf;
    lodash.pull = pull;
    lodash.pullAll = pullAll;
    lodash.pullAllBy = pullAllBy;
    lodash.pullAllWith = pullAllWith;
    lodash.pullAt = pullAt;
    lodash.range = range;
    lodash.rangeRight = rangeRight;
    lodash.rearg = rearg;
    lodash.reject = reject;
    lodash.remove = remove;
    lodash.rest = rest;
    lodash.reverse = reverse;
    lodash.sampleSize = sampleSize;
    lodash.set = set;
    lodash.setWith = setWith;
    lodash.shuffle = shuffle;
    lodash.slice = slice;
    lodash.sortBy = sortBy;
    lodash.sortedUniq = sortedUniq;
    lodash.sortedUniqBy = sortedUniqBy;
    lodash.split = split;
    lodash.spread = spread;
    lodash.tail = tail;
    lodash.take = take;
    lodash.takeRight = takeRight;
    lodash.takeRightWhile = takeRightWhile;
    lodash.takeWhile = takeWhile;
    lodash.tap = tap;
    lodash.throttle = throttle;
    lodash.thru = thru;
    lodash.toArray = toArray;
    lodash.toPairs = toPairs;
    lodash.toPairsIn = toPairsIn;
    lodash.toPath = toPath;
    lodash.toPlainObject = toPlainObject;
    lodash.transform = transform;
    lodash.unary = unary;
    lodash.union = union;
    lodash.unionBy = unionBy;
    lodash.unionWith = unionWith;
    lodash.uniq = uniq;
    lodash.uniqBy = uniqBy;
    lodash.uniqWith = uniqWith;
    lodash.unset = unset;
    lodash.unzip = unzip;
    lodash.unzipWith = unzipWith;
    lodash.update = update;
    lodash.updateWith = updateWith;
    lodash.values = values;
    lodash.valuesIn = valuesIn;
    lodash.without = without;
    lodash.words = words;
    lodash.wrap = wrap;
    lodash.xor = xor;
    lodash.xorBy = xorBy;
    lodash.xorWith = xorWith;
    lodash.zip = zip;
    lodash.zipObject = zipObject;
    lodash.zipObjectDeep = zipObjectDeep;
    lodash.zipWith = zipWith;

    // Add aliases.
    lodash.entries = toPairs;
    lodash.entriesIn = toPairsIn;
    lodash.extend = assignIn;
    lodash.extendWith = assignInWith;

    // Add methods to `lodash.prototype`.
    mixin(lodash, lodash);

    /*------------------------------------------------------------------------*/

    // Add methods that return unwrapped values in chain sequences.
    lodash.add = add;
    lodash.attempt = attempt;
    lodash.camelCase = camelCase;
    lodash.capitalize = capitalize;
    lodash.ceil = ceil;
    lodash.clamp = clamp;
    lodash.clone = clone;
    lodash.cloneDeep = cloneDeep;
    lodash.cloneDeepWith = cloneDeepWith;
    lodash.cloneWith = cloneWith;
    lodash.conformsTo = conformsTo;
    lodash.deburr = deburr;
    lodash.defaultTo = defaultTo;
    lodash.divide = divide;
    lodash.endsWith = endsWith;
    lodash.eq = eq;
    lodash.escape = escape;
    lodash.escapeRegExp = escapeRegExp;
    lodash.every = every;
    lodash.find = find;
    lodash.findIndex = findIndex;
    lodash.findKey = findKey;
    lodash.findLast = findLast;
    lodash.findLastIndex = findLastIndex;
    lodash.findLastKey = findLastKey;
    lodash.floor = floor;
    lodash.forEach = forEach;
    lodash.forEachRight = forEachRight;
    lodash.forIn = forIn;
    lodash.forInRight = forInRight;
    lodash.forOwn = forOwn;
    lodash.forOwnRight = forOwnRight;
    lodash.get = get;
    lodash.gt = gt;
    lodash.gte = gte;
    lodash.has = has;
    lodash.hasIn = hasIn;
    lodash.head = head;
    lodash.identity = identity;
    lodash.includes = includes;
    lodash.indexOf = indexOf;
    lodash.inRange = inRange;
    lodash.invoke = invoke;
    lodash.isArguments = isArguments;
    lodash.isArray = isArray;
    lodash.isArrayBuffer = isArrayBuffer;
    lodash.isArrayLike = isArrayLike;
    lodash.isArrayLikeObject = isArrayLikeObject;
    lodash.isBoolean = isBoolean;
    lodash.isBuffer = isBuffer;
    lodash.isDate = isDate;
    lodash.isElement = isElement;
    lodash.isEmpty = isEmpty;
    lodash.isEqual = isEqual;
    lodash.isEqualWith = isEqualWith;
    lodash.isError = isError;
    lodash.isFinite = isFinite;
    lodash.isFunction = isFunction;
    lodash.isInteger = isInteger;
    lodash.isLength = isLength;
    lodash.isMap = isMap;
    lodash.isMatch = isMatch;
    lodash.isMatchWith = isMatchWith;
    lodash.isNaN = isNaN;
    lodash.isNative = isNative;
    lodash.isNil = isNil;
    lodash.isNull = isNull;
    lodash.isNumber = isNumber;
    lodash.isObject = isObject;
    lodash.isObjectLike = isObjectLike;
    lodash.isPlainObject = isPlainObject;
    lodash.isRegExp = isRegExp;
    lodash.isSafeInteger = isSafeInteger;
    lodash.isSet = isSet;
    lodash.isString = isString;
    lodash.isSymbol = isSymbol;
    lodash.isTypedArray = isTypedArray;
    lodash.isUndefined = isUndefined;
    lodash.isWeakMap = isWeakMap;
    lodash.isWeakSet = isWeakSet;
    lodash.join = join;
    lodash.kebabCase = kebabCase;
    lodash.last = last;
    lodash.lastIndexOf = lastIndexOf;
    lodash.lowerCase = lowerCase;
    lodash.lowerFirst = lowerFirst;
    lodash.lt = lt;
    lodash.lte = lte;
    lodash.max = max;
    lodash.maxBy = maxBy;
    lodash.mean = mean;
    lodash.meanBy = meanBy;
    lodash.min = min;
    lodash.minBy = minBy;
    lodash.stubArray = stubArray;
    lodash.stubFalse = stubFalse;
    lodash.stubObject = stubObject;
    lodash.stubString = stubString;
    lodash.stubTrue = stubTrue;
    lodash.multiply = multiply;
    lodash.nth = nth;
    lodash.noConflict = noConflict;
    lodash.noop = noop;
    lodash.now = now;
    lodash.pad = pad;
    lodash.padEnd = padEnd;
    lodash.padStart = padStart;
    lodash.parseInt = parseInt;
    lodash.random = random;
    lodash.reduce = reduce;
    lodash.reduceRight = reduceRight;
    lodash.repeat = repeat;
    lodash.replace = replace;
    lodash.result = result;
    lodash.round = round;
    lodash.runInContext = runInContext;
    lodash.sample = sample;
    lodash.size = size;
    lodash.snakeCase = snakeCase;
    lodash.some = some;
    lodash.sortedIndex = sortedIndex;
    lodash.sortedIndexBy = sortedIndexBy;
    lodash.sortedIndexOf = sortedIndexOf;
    lodash.sortedLastIndex = sortedLastIndex;
    lodash.sortedLastIndexBy = sortedLastIndexBy;
    lodash.sortedLastIndexOf = sortedLastIndexOf;
    lodash.startCase = startCase;
    lodash.startsWith = startsWith;
    lodash.subtract = subtract;
    lodash.sum = sum;
    lodash.sumBy = sumBy;
    lodash.template = template;
    lodash.times = times;
    lodash.toFinite = toFinite;
    lodash.toInteger = toInteger;
    lodash.toLength = toLength;
    lodash.toLower = toLower;
    lodash.toNumber = toNumber;
    lodash.toSafeInteger = toSafeInteger;
    lodash.toString = toString;
    lodash.toUpper = toUpper;
    lodash.trim = trim;
    lodash.trimEnd = trimEnd;
    lodash.trimStart = trimStart;
    lodash.truncate = truncate;
    lodash.unescape = unescape;
    lodash.uniqueId = uniqueId;
    lodash.upperCase = upperCase;
    lodash.upperFirst = upperFirst;

    // Add aliases.
    lodash.each = forEach;
    lodash.eachRight = forEachRight;
    lodash.first = head;

    mixin(lodash, (function() {
      var source = {};
      baseForOwn(lodash, function(func, methodName) {
        if (!hasOwnProperty.call(lodash.prototype, methodName)) {
          source[methodName] = func;
        }
      });
      return source;
    }()), { 'chain': false });

    /*------------------------------------------------------------------------*/

    /**
     * The semantic version number.
     *
     * @static
     * @memberOf _
     * @type {string}
     */
    lodash.VERSION = VERSION;

    // Assign default placeholders.
    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
      lodash[methodName].placeholder = lodash;
    });

    // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
    arrayEach(['drop', 'take'], function(methodName, index) {
      LazyWrapper.prototype[methodName] = function(n) {
        n = n === undefined ? 1 : nativeMax(toInteger(n), 0);

        var result = (this.__filtered__ && !index)
          ? new LazyWrapper(this)
          : this.clone();

        if (result.__filtered__) {
          result.__takeCount__ = nativeMin(n, result.__takeCount__);
        } else {
          result.__views__.push({
            'size': nativeMin(n, MAX_ARRAY_LENGTH),
            'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
          });
        }
        return result;
      };

      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
        return this.reverse()[methodName](n).reverse();
      };
    });

    // Add `LazyWrapper` methods that accept an `iteratee` value.
    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
      var type = index + 1,
          isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;

      LazyWrapper.prototype[methodName] = function(iteratee) {
        var result = this.clone();
        result.__iteratees__.push({
          'iteratee': getIteratee(iteratee, 3),
          'type': type
        });
        result.__filtered__ = result.__filtered__ || isFilter;
        return result;
      };
    });

    // Add `LazyWrapper` methods for `_.head` and `_.last`.
    arrayEach(['head', 'last'], function(methodName, index) {
      var takeName = 'take' + (index ? 'Right' : '');

      LazyWrapper.prototype[methodName] = function() {
        return this[takeName](1).value()[0];
      };
    });

    // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
    arrayEach(['initial', 'tail'], function(methodName, index) {
      var dropName = 'drop' + (index ? '' : 'Right');

      LazyWrapper.prototype[methodName] = function() {
        return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
      };
    });

    LazyWrapper.prototype.compact = function() {
      return this.filter(identity);
    };

    LazyWrapper.prototype.find = function(predicate) {
      return this.filter(predicate).head();
    };

    LazyWrapper.prototype.findLast = function(predicate) {
      return this.reverse().find(predicate);
    };

    LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
      if (typeof path == 'function') {
        return new LazyWrapper(this);
      }
      return this.map(function(value) {
        return baseInvoke(value, path, args);
      });
    });

    LazyWrapper.prototype.reject = function(predicate) {
      return this.filter(negate(getIteratee(predicate)));
    };

    LazyWrapper.prototype.slice = function(start, end) {
      start = toInteger(start);

      var result = this;
      if (result.__filtered__ && (start > 0 || end < 0)) {
        return new LazyWrapper(result);
      }
      if (start < 0) {
        result = result.takeRight(-start);
      } else if (start) {
        result = result.drop(start);
      }
      if (end !== undefined) {
        end = toInteger(end);
        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
      }
      return result;
    };

    LazyWrapper.prototype.takeRightWhile = function(predicate) {
      return this.reverse().takeWhile(predicate).reverse();
    };

    LazyWrapper.prototype.toArray = function() {
      return this.take(MAX_ARRAY_LENGTH);
    };

    // Add `LazyWrapper` methods to `lodash.prototype`.
    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
      var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
          isTaker = /^(?:head|last)$/.test(methodName),
          lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
          retUnwrapped = isTaker || /^find/.test(methodName);

      if (!lodashFunc) {
        return;
      }
      lodash.prototype[methodName] = function() {
        var value = this.__wrapped__,
            args = isTaker ? [1] : arguments,
            isLazy = value instanceof LazyWrapper,
            iteratee = args[0],
            useLazy = isLazy || isArray(value);

        var interceptor = function(value) {
          var result = lodashFunc.apply(lodash, arrayPush([value], args));
          return (isTaker && chainAll) ? result[0] : result;
        };

        if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
          // Avoid lazy use if the iteratee has a "length" value other than `1`.
          isLazy = useLazy = false;
        }
        var chainAll = this.__chain__,
            isHybrid = !!this.__actions__.length,
            isUnwrapped = retUnwrapped && !chainAll,
            onlyLazy = isLazy && !isHybrid;

        if (!retUnwrapped && useLazy) {
          value = onlyLazy ? value : new LazyWrapper(this);
          var result = func.apply(value, args);
          result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
          return new LodashWrapper(result, chainAll);
        }
        if (isUnwrapped && onlyLazy) {
          return func.apply(this, args);
        }
        result = this.thru(interceptor);
        return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
      };
    });

    // Add `Array` methods to `lodash.prototype`.
    arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
      var func = arrayProto[methodName],
          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
          retUnwrapped = /^(?:pop|shift)$/.test(methodName);

      lodash.prototype[methodName] = function() {
        var args = arguments;
        if (retUnwrapped && !this.__chain__) {
          var value = this.value();
          return func.apply(isArray(value) ? value : [], args);
        }
        return this[chainName](function(value) {
          return func.apply(isArray(value) ? value : [], args);
        });
      };
    });

    // Map minified method names to their real names.
    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
      var lodashFunc = lodash[methodName];
      if (lodashFunc) {
        var key = lodashFunc.name + '';
        if (!hasOwnProperty.call(realNames, key)) {
          realNames[key] = [];
        }
        realNames[key].push({ 'name': methodName, 'func': lodashFunc });
      }
    });

    realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
      'name': 'wrapper',
      'func': undefined
    }];

    // Add methods to `LazyWrapper`.
    LazyWrapper.prototype.clone = lazyClone;
    LazyWrapper.prototype.reverse = lazyReverse;
    LazyWrapper.prototype.value = lazyValue;

    // Add chain sequence methods to the `lodash` wrapper.
    lodash.prototype.at = wrapperAt;
    lodash.prototype.chain = wrapperChain;
    lodash.prototype.commit = wrapperCommit;
    lodash.prototype.next = wrapperNext;
    lodash.prototype.plant = wrapperPlant;
    lodash.prototype.reverse = wrapperReverse;
    lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;

    // Add lazy aliases.
    lodash.prototype.first = lodash.prototype.head;

    if (symIterator) {
      lodash.prototype[symIterator] = wrapperToIterator;
    }
    return lodash;
  });

  /*--------------------------------------------------------------------------*/

  // Export lodash.
  var _ = runInContext();

  // Some AMD build optimizers, like r.js, check for condition patterns like:
  if (true) {
    // Expose Lodash on the global object to prevent errors when Lodash is
    // loaded by a script tag in the presence of an AMD loader.
    // See http://requirejs.org/docs/errors.html#mismatch for more details.
    // Use `_.noConflict` to remove Lodash from the global object.
    root._ = _;

    // Define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module.
    !(__WEBPACK_AMD_DEFINE_RESULT__ = (function() {
      return _;
    }).call(exports, __webpack_require__, exports, module),
				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
  }
  // Check for `exports` after `define` in case a build optimizer adds it.
  else {}
}.call(this));

/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../webpack/buildin/global.js */ "./node_modules/webpack/buildin/global.js"), __webpack_require__(/*! ./../webpack/buildin/module.js */ "./node_modules/webpack/buildin/module.js")(module)))

/***/ }),

/***/ "./node_modules/process/browser.js":
/*!*****************************************!*\
  !*** ./node_modules/process/browser.js ***!
  \*****************************************/
/*! no static exports found */
/***/ (function(module, exports) {

// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };


/***/ }),

/***/ "./node_modules/setimmediate/setImmediate.js":
/*!***************************************************!*\
  !*** ./node_modules/setimmediate/setImmediate.js ***!
  \***************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

/* WEBPACK VAR INJECTION */(function(global, process) {(function (global, undefined) {
    "use strict";

    if (global.setImmediate) {
        return;
    }

    var nextHandle = 1; // Spec says greater than zero
    var tasksByHandle = {};
    var currentlyRunningATask = false;
    var doc = global.document;
    var registerImmediate;

    function setImmediate(callback) {
      // Callback can either be a function or a string
      if (typeof callback !== "function") {
        callback = new Function("" + callback);
      }
      // Copy function arguments
      var args = new Array(arguments.length - 1);
      for (var i = 0; i < args.length; i++) {
          args[i] = arguments[i + 1];
      }
      // Store and register the task
      var task = { callback: callback, args: args };
      tasksByHandle[nextHandle] = task;
      registerImmediate(nextHandle);
      return nextHandle++;
    }

    function clearImmediate(handle) {
        delete tasksByHandle[handle];
    }

    function run(task) {
        var callback = task.callback;
        var args = task.args;
        switch (args.length) {
        case 0:
            callback();
            break;
        case 1:
            callback(args[0]);
            break;
        case 2:
            callback(args[0], args[1]);
            break;
        case 3:
            callback(args[0], args[1], args[2]);
            break;
        default:
            callback.apply(undefined, args);
            break;
        }
    }

    function runIfPresent(handle) {
        // From the spec: "Wait until any invocations of this algorithm started before this one have completed."
        // So if we're currently running a task, we'll need to delay this invocation.
        if (currentlyRunningATask) {
            // Delay by doing a setTimeout. setImmediate was tried instead, but in Firefox 7 it generated a
            // "too much recursion" error.
            setTimeout(runIfPresent, 0, handle);
        } else {
            var task = tasksByHandle[handle];
            if (task) {
                currentlyRunningATask = true;
                try {
                    run(task);
                } finally {
                    clearImmediate(handle);
                    currentlyRunningATask = false;
                }
            }
        }
    }

    function installNextTickImplementation() {
        registerImmediate = function(handle) {
            process.nextTick(function () { runIfPresent(handle); });
        };
    }

    function canUsePostMessage() {
        // The test against `importScripts` prevents this implementation from being installed inside a web worker,
        // where `global.postMessage` means something completely different and can't be used for this purpose.
        if (global.postMessage && !global.importScripts) {
            var postMessageIsAsynchronous = true;
            var oldOnMessage = global.onmessage;
            global.onmessage = function() {
                postMessageIsAsynchronous = false;
            };
            global.postMessage("", "*");
            global.onmessage = oldOnMessage;
            return postMessageIsAsynchronous;
        }
    }

    function installPostMessageImplementation() {
        // Installs an event handler on `global` for the `message` event: see
        // * https://developer.mozilla.org/en/DOM/window.postMessage
        // * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#crossDocumentMessages

        var messagePrefix = "setImmediate$" + Math.random() + "$";
        var onGlobalMessage = function(event) {
            if (event.source === global &&
                typeof event.data === "string" &&
                event.data.indexOf(messagePrefix) === 0) {
                runIfPresent(+event.data.slice(messagePrefix.length));
            }
        };

        if (global.addEventListener) {
            global.addEventListener("message", onGlobalMessage, false);
        } else {
            global.attachEvent("onmessage", onGlobalMessage);
        }

        registerImmediate = function(handle) {
            global.postMessage(messagePrefix + handle, "*");
        };
    }

    function installMessageChannelImplementation() {
        var channel = new MessageChannel();
        channel.port1.onmessage = function(event) {
            var handle = event.data;
            runIfPresent(handle);
        };

        registerImmediate = function(handle) {
            channel.port2.postMessage(handle);
        };
    }

    function installReadyStateChangeImplementation() {
        var html = doc.documentElement;
        registerImmediate = function(handle) {
            // Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted
            // into the document. Do so, thus queuing up the task. Remember to clean up once it's been called.
            var script = doc.createElement("script");
            script.onreadystatechange = function () {
                runIfPresent(handle);
                script.onreadystatechange = null;
                html.removeChild(script);
                script = null;
            };
            html.appendChild(script);
        };
    }

    function installSetTimeoutImplementation() {
        registerImmediate = function(handle) {
            setTimeout(runIfPresent, 0, handle);
        };
    }

    // If supported, we should attach to the prototype of global, since that is where setTimeout et al. live.
    var attachTo = Object.getPrototypeOf && Object.getPrototypeOf(global);
    attachTo = attachTo && attachTo.setTimeout ? attachTo : global;

    // Don't get fooled by e.g. browserify environments.
    if ({}.toString.call(global.process) === "[object process]") {
        // For Node.js before 0.9
        installNextTickImplementation();

    } else if (canUsePostMessage()) {
        // For non-IE10 modern browsers
        installPostMessageImplementation();

    } else if (global.MessageChannel) {
        // For web workers, where supported
        installMessageChannelImplementation();

    } else if (doc && "onreadystatechange" in doc.createElement("script")) {
        // For IE 6–8
        installReadyStateChangeImplementation();

    } else {
        // For older browsers
        installSetTimeoutImplementation();
    }

    attachTo.setImmediate = setImmediate;
    attachTo.clearImmediate = clearImmediate;
}(typeof self === "undefined" ? typeof global === "undefined" ? this : global : self));

/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../webpack/buildin/global.js */ "./node_modules/webpack/buildin/global.js"), __webpack_require__(/*! ./../process/browser.js */ "./node_modules/process/browser.js")))

/***/ }),

/***/ "./node_modules/timers-browserify/main.js":
/*!************************************************!*\
  !*** ./node_modules/timers-browserify/main.js ***!
  \************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

/* WEBPACK VAR INJECTION */(function(global) {var scope = (typeof global !== "undefined" && global) ||
            (typeof self !== "undefined" && self) ||
            window;
var apply = Function.prototype.apply;

// DOM APIs, for completeness

exports.setTimeout = function() {
  return new Timeout(apply.call(setTimeout, scope, arguments), clearTimeout);
};
exports.setInterval = function() {
  return new Timeout(apply.call(setInterval, scope, arguments), clearInterval);
};
exports.clearTimeout =
exports.clearInterval = function(timeout) {
  if (timeout) {
    timeout.close();
  }
};

function Timeout(id, clearFn) {
  this._id = id;
  this._clearFn = clearFn;
}
Timeout.prototype.unref = Timeout.prototype.ref = function() {};
Timeout.prototype.close = function() {
  this._clearFn.call(scope, this._id);
};

// Does not start the time, just sets up the members needed.
exports.enroll = function(item, msecs) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = msecs;
};

exports.unenroll = function(item) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = -1;
};

exports._unrefActive = exports.active = function(item) {
  clearTimeout(item._idleTimeoutId);

  var msecs = item._idleTimeout;
  if (msecs >= 0) {
    item._idleTimeoutId = setTimeout(function onTimeout() {
      if (item._onTimeout)
        item._onTimeout();
    }, msecs);
  }
};

// setimmediate attaches itself to the global object
__webpack_require__(/*! setimmediate */ "./node_modules/setimmediate/setImmediate.js");
// On some exotic environments, it's not clear which object `setimmediate` was
// able to install onto.  Search each possibility in the same order as the
// `setimmediate` library.
exports.setImmediate = (typeof self !== "undefined" && self.setImmediate) ||
                       (typeof global !== "undefined" && global.setImmediate) ||
                       (this && this.setImmediate);
exports.clearImmediate = (typeof self !== "undefined" && self.clearImmediate) ||
                         (typeof global !== "undefined" && global.clearImmediate) ||
                         (this && this.clearImmediate);

/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../webpack/buildin/global.js */ "./node_modules/webpack/buildin/global.js")))

/***/ }),

/***/ "./node_modules/uikit/dist/js/uikit-icons.js":
/*!***************************************************!*\
  !*** ./node_modules/uikit/dist/js/uikit-icons.js ***!
  \***************************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

/*! UIkit 3.4.0 | https://www.getuikit.com | (c) 2014 - 2020 YOOtheme | MIT License */

(function (global, factory) {
     true ? module.exports = factory() :
    undefined;
}(this, (function () { 'use strict';

    function plugin(UIkit) {

        if (plugin.installed) {
            return;
        }

        UIkit.icon.add({
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    }

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})));


/***/ }),

/***/ "./node_modules/uikit/dist/js/uikit.js":
/*!*********************************************!*\
  !*** ./node_modules/uikit/dist/js/uikit.js ***!
  \*********************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

/* WEBPACK VAR INJECTION */(function(setImmediate) {/*! UIkit 3.4.0 | https://www.getuikit.com | (c) 2014 - 2020 YOOtheme | MIT License */

(function (global, factory) {
     true ? module.exports = factory() :
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}(this, (function () { 'use strict';

    var objPrototype = Object.prototype;
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    function endsWith(str, search) {
        return endsWithFn.call(str, search);
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    var includesFn = function (search, i) { return ~this.indexOf(search, i); };
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    var includesArray = arrPrototype.includes || includesFn;

    function includes(obj, search) {
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    }

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    function findIndex(array, predicate) {
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        return obj !== null && typeof obj === 'object';
    }

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    }

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                ? value.split(/,(?![^(]*\))/).map(function (value) { return isNumeric(value)
                    ? toNumber(value)
                    : toBoolean(value.trim()); })
                : [value];
    }

    function toMs(time) {
        return !time
            ? 0
            : endsWith(time, 'ms')
                ? toFloat(time)
                : toFloat(time) * 1000;
    }

    function isEqual(value, other) {
        return value === other
            || isObject(value)
            && isObject(other)
            && Object.keys(value).length === Object.keys(other).length
            && each(value, function (val, key) { return val === other[key]; });
    }

    function swap(value, a, b) {
        return value.replace(new RegExp((a + "|" + b), 'mg'), function (match) {
            return match === a ? b : a;
        });
    }

    var assign = Object.assign || function (target) {
        var args = [], len = arguments.length - 1;
        while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];

        target = Object(target);
        for (var i = 0; i < args.length; i++) {
            var source = args[i];
            if (source !== null) {
                for (var key in source) {
                    if (hasOwn(source, key)) {
                        target[key] = source[key];
                    }
                }
            }
        }
        return target;
    };

    function last(array) {
        return array[array.length - 1];
    }

    function each(obj, cb) {
        for (var key in obj) {
            if (false === cb(obj[key], key)) {
                return false;
            }
        }
        return true;
    }

    function sortBy(array, prop) {
        return array.sort(function (ref, ref$1) {
                var propA = ref[prop]; if ( propA === void 0 ) propA = 0;
                var propB = ref$1[prop]; if ( propB === void 0 ) propB = 0;

                return propA > propB
                ? 1
                : propB > propA
                    ? -1
                    : 0;
        }
        );
    }

    function uniqueBy(array, prop) {
        var seen = new Set();
        return array.filter(function (ref) {
            var check = ref[prop];

            return seen.has(check)
            ? false
            : seen.add(check) || true;
        } // IE 11 does not return the Set object
        );
    }

    function clamp(number, min, max) {
        if ( min === void 0 ) min = 0;
        if ( max === void 0 ) max = 1;

        return Math.min(Math.max(toNumber(number) || 0, min), max);
    }

    function noop() {}

    function intersectRect(r1, r2) {
        return r1.left < r2.right &&
            r1.right > r2.left &&
            r1.top < r2.bottom &&
            r1.bottom > r2.top;
    }

    function pointInRect(point, rect) {
        return point.x <= rect.right &&
            point.x >= rect.left &&
            point.y <= rect.bottom &&
            point.y >= rect.top;
    }

    var Dimensions = {

        ratio: function(dimensions, prop, value) {
            var obj;


            var aProp = prop === 'width' ? 'height' : 'width';

            return ( obj = {}, obj[aProp] = dimensions[prop] ? Math.round(value * dimensions[aProp] / dimensions[prop]) : dimensions[aProp], obj[prop] = value, obj );
        },

        contain: function(dimensions, maxDimensions) {
            var this$1 = this;

            dimensions = assign({}, dimensions);

            each(dimensions, function (_, prop) { return dimensions = dimensions[prop] > maxDimensions[prop]
                ? this$1.ratio(dimensions, prop, maxDimensions[prop])
                : dimensions; }
            );

            return dimensions;
        },

        cover: function(dimensions, maxDimensions) {
            var this$1 = this;

            dimensions = this.contain(dimensions, maxDimensions);

            each(dimensions, function (_, prop) { return dimensions = dimensions[prop] < maxDimensions[prop]
                ? this$1.ratio(dimensions, prop, maxDimensions[prop])
                : dimensions; }
            );

            return dimensions;
        }

    };

    function attr(element, name, value) {

        if (isObject(name)) {
            for (var key in name) {
                attr(element, key, name[key]);
            }
            return;
        }

        if (isUndefined(value)) {
            element = toNode(element);
            return element && element.getAttribute(name);
        } else {
            toNodes(element).forEach(function (element) {

                if (isFunction(value)) {
                    value = value.call(element, attr(element, name));
                }

                if (value === null) {
                    removeAttr(element, name);
                } else {
                    element.setAttribute(name, value);
                }
            });
        }

    }

    function hasAttr(element, name) {
        return toNodes(element).some(function (element) { return element.hasAttribute(name); });
    }

    function removeAttr(element, name) {
        element = toNodes(element);
        name.split(' ').forEach(function (name) { return element.forEach(function (element) { return element.hasAttribute(name) && element.removeAttribute(name); }
            ); }
        );
    }

    function data(element, attribute) {
        for (var i = 0, attrs = [attribute, ("data-" + attribute)]; i < attrs.length; i++) {
            if (hasAttr(element, attrs[i])) {
                return attr(element, attrs[i]);
            }
        }
    }

    /* global DocumentTouch */

    var isIE = /msie|trident/i.test(window.navigator.userAgent);
    var isRtl = attr(document.documentElement, 'dir') === 'rtl';

    var hasTouchEvents = 'ontouchstart' in window;
    var hasPointerEvents = window.PointerEvent;
    var hasTouch = hasTouchEvents
        || window.DocumentTouch && document instanceof DocumentTouch
        || navigator.maxTouchPoints; // IE >=11

    var pointerDown = hasPointerEvents ? 'pointerdown' : hasTouchEvents ? 'touchstart' : 'mousedown';
    var pointerMove = hasPointerEvents ? 'pointermove' : hasTouchEvents ? 'touchmove' : 'mousemove';
    var pointerUp = hasPointerEvents ? 'pointerup' : hasTouchEvents ? 'touchend' : 'mouseup';
    var pointerEnter = hasPointerEvents ? 'pointerenter' : hasTouchEvents ? '' : 'mouseenter';
    var pointerLeave = hasPointerEvents ? 'pointerleave' : hasTouchEvents ? '' : 'mouseleave';
    var pointerCancel = hasPointerEvents ? 'pointercancel' : 'touchcancel';

    function query(selector, context) {
        return toNode(selector) || find(selector, getContext(selector, context));
    }

    function queryAll(selector, context) {
        var nodes = toNodes(selector);
        return nodes.length && nodes || findAll(selector, getContext(selector, context));
    }

    function getContext(selector, context) {
        if ( context === void 0 ) context = document;

        return isContextSelector(selector) || isDocument(context)
            ? context
            : context.ownerDocument;
    }

    function find(selector, context) {
        return toNode(_query(selector, context, 'querySelector'));
    }

    function findAll(selector, context) {
        return toNodes(_query(selector, context, 'querySelectorAll'));
    }

    function _query(selector, context, queryFn) {
        if ( context === void 0 ) context = document;


        if (!selector || !isString(selector)) {
            return null;
        }

        selector = selector.replace(contextSanitizeRe, '$1 *');

        var removes;

        if (isContextSelector(selector)) {

            removes = [];

            selector = splitSelector(selector).map(function (selector, i) {

                var ctx = context;

                if (selector[0] === '!') {

                    var selectors = selector.substr(1).trim().split(' ');
                    ctx = closest(parent(context), selectors[0]);
                    selector = selectors.slice(1).join(' ').trim();

                }

                if (selector[0] === '-') {

                    var selectors$1 = selector.substr(1).trim().split(' ');
                    var prev = (ctx || context).previousElementSibling;
                    ctx = matches(prev, selector.substr(1)) ? prev : null;
                    selector = selectors$1.slice(1).join(' ');

                }

                if (!ctx) {
                    return null;
                }

                if (!ctx.id) {
                    ctx.id = "uk-" + (Date.now()) + i;
                    removes.push(function () { return removeAttr(ctx, 'id'); });
                }

                return ("#" + (escape(ctx.id)) + " " + selector);

            }).filter(Boolean).join(',');

            context = document;

        }

        try {

            return context[queryFn](selector);

        } catch (e) {

            return null;

        } finally {

            removes && removes.forEach(function (remove) { return remove(); });

        }

    }

    var contextSelectorRe = /(^|[^\\],)\s*[!>+~-]/;
    var contextSanitizeRe = /([!>+~-])(?=\s+[!>+~-]|\s*$)/g;

    function isContextSelector(selector) {
        return isString(selector) && selector.match(contextSelectorRe);
    }

    var selectorRe = /.*?[^\\](?:,|$)/g;

    function splitSelector(selector) {
        return selector.match(selectorRe).map(function (selector) { return selector.replace(/,$/, '').trim(); });
    }

    var elProto = Element.prototype;
    var matchesFn = elProto.matches || elProto.webkitMatchesSelector || elProto.msMatchesSelector;

    function matches(element, selector) {
        return toNodes(element).some(function (element) { return matchesFn.call(element, selector); });
    }

    var closestFn = elProto.closest || function (selector) {
        var ancestor = this;

        do {

            if (matches(ancestor, selector)) {
                return ancestor;
            }

        } while ((ancestor = parent(ancestor)));
    };

    function closest(element, selector) {

        if (startsWith(selector, '>')) {
            selector = selector.slice(1);
        }

        return isElement(element)
            ? closestFn.call(element, selector)
            : toNodes(element).map(function (element) { return closest(element, selector); }).filter(Boolean);
    }

    function parent(element) {
        element = toNode(element);
        return element && isElement(element.parentNode) && element.parentNode;
    }

    var escapeFn = window.CSS && CSS.escape || function (css) { return css.replace(/([^\x7f-\uFFFF\w-])/g, function (match) { return ("\\" + match); }); };
    function escape(css) {
        return isString(css) ? escapeFn.call(null, css) : '';
    }

    var voidElements = {
        area: true,
        base: true,
        br: true,
        col: true,
        embed: true,
        hr: true,
        img: true,
        input: true,
        keygen: true,
        link: true,
        menuitem: true,
        meta: true,
        param: true,
        source: true,
        track: true,
        wbr: true
    };
    function isVoidElement(element) {
        return toNodes(element).some(function (element) { return voidElements[element.tagName.toLowerCase()]; });
    }

    function isVisible(element) {
        return toNodes(element).some(function (element) { return element.offsetWidth || element.offsetHeight || element.getClientRects().length; });
    }

    var selInput = 'input,select,textarea,button';
    function isInput(element) {
        return toNodes(element).some(function (element) { return matches(element, selInput); });
    }

    function filter(element, selector) {
        return toNodes(element).filter(function (element) { return matches(element, selector); });
    }

    function within(element, selector) {
        return !isString(selector)
            ? element === selector || (isDocument(selector)
                ? selector.documentElement
                : toNode(selector)).contains(toNode(element)) // IE 11 document does not implement contains
            : matches(element, selector) || closest(element, selector);
    }

    function parents(element, selector) {
        var elements = [];

        while ((element = parent(element))) {
            if (!selector || matches(element, selector)) {
                elements.push(element);
            }
        }

        return elements;
    }

    function children(element, selector) {
        element = toNode(element);
        var children = element ? toNodes(element.children) : [];
        return selector ? filter(children, selector) : children;
    }

    function on() {
        var args = [], len = arguments.length;
        while ( len-- ) args[ len ] = arguments[ len ];


        var ref = getArgs(args);
        var targets = ref[0];
        var type = ref[1];
        var selector = ref[2];
        var listener = ref[3];
        var useCapture = ref[4];

        targets = toEventTargets(targets);

        if (listener.length > 1) {
            listener = detail(listener);
        }

        if (useCapture && useCapture.self) {
            listener = selfFilter(listener);
        }

        if (selector) {
            listener = delegate(targets, selector, listener);
        }

        useCapture = useCaptureFilter(useCapture);

        type.split(' ').forEach(function (type) { return targets.forEach(function (target) { return target.addEventListener(type, listener, useCapture); }
            ); }
        );
        return function () { return off(targets, type, listener, useCapture); };
    }

    function off(targets, type, listener, useCapture) {
        if ( useCapture === void 0 ) useCapture = false;

        useCapture = useCaptureFilter(useCapture);
        targets = toEventTargets(targets);
        type.split(' ').forEach(function (type) { return targets.forEach(function (target) { return target.removeEventListener(type, listener, useCapture); }
            ); }
        );
    }

    function once() {
        var args = [], len = arguments.length;
        while ( len-- ) args[ len ] = arguments[ len ];


        var ref = getArgs(args);
        var element = ref[0];
        var type = ref[1];
        var selector = ref[2];
        var listener = ref[3];
        var useCapture = ref[4];
        var condition = ref[5];
        var off = on(element, type, selector, function (e) {
            var result = !condition || condition(e);
            if (result) {
                off();
                listener(e, result);
            }
        }, useCapture);

        return off;
    }

    function trigger(targets, event, detail) {
        return toEventTargets(targets).reduce(function (notCanceled, target) { return notCanceled && target.dispatchEvent(createEvent(event, true, true, detail)); }
            , true);
    }

    function createEvent(e, bubbles, cancelable, detail) {
        if ( bubbles === void 0 ) bubbles = true;
        if ( cancelable === void 0 ) cancelable = false;

        if (isString(e)) {
            var event = document.createEvent('CustomEvent'); // IE 11
            event.initCustomEvent(e, bubbles, cancelable, detail);
            e = event;
        }

        return e;
    }

    function getArgs(args) {
        if (isFunction(args[2])) {
            args.splice(2, 0, false);
        }
        return args;
    }

    function delegate(delegates, selector, listener) {
        var this$1 = this;

        return function (e) {

            delegates.forEach(function (delegate) {

                var current = selector[0] === '>'
                    ? findAll(selector, delegate).reverse().filter(function (element) { return within(e.target, element); })[0]
                    : closest(e.target, selector);

                if (current) {
                    e.delegate = delegate;
                    e.current = current;

                    listener.call(this$1, e);
                }

            });

        };
    }

    function detail(listener) {
        return function (e) { return isArray(e.detail) ? listener.apply(void 0, [ e ].concat( e.detail )) : listener(e); };
    }

    function selfFilter(listener) {
        return function (e) {
            if (e.target === e.currentTarget || e.target === e.current) {
                return listener.call(null, e);
            }
        };
    }

    function useCaptureFilter(options) {
        return options && isIE && !isBoolean(options)
            ? !!options.capture
            : options;
    }

    function isEventTarget(target) {
        return target && 'addEventListener' in target;
    }

    function toEventTarget(target) {
        return isEventTarget(target) ? target : toNode(target);
    }

    function toEventTargets(target) {
        return isArray(target)
                ? target.map(toEventTarget).filter(Boolean)
                : isString(target)
                    ? findAll(target)
                    : isEventTarget(target)
                        ? [target]
                        : toNodes(target);
    }

    function isTouch(e) {
        return e.pointerType === 'touch' || !!e.touches;
    }

    function getEventPos(e) {
        var touches = e.touches;
        var changedTouches = e.changedTouches;
        var ref = touches && touches[0] || changedTouches && changedTouches[0] || e;
        var x = ref.clientX;
        var y = ref.clientY;

        return {x: x, y: y};
    }

    /* global setImmediate */

    var Promise = 'Promise' in window ? window.Promise : PromiseFn;

    var Deferred = function() {
        var this$1 = this;

        this.promise = new Promise(function (resolve, reject) {
            this$1.reject = reject;
            this$1.resolve = resolve;
        });
    };

    /**
     * Promises/A+ polyfill v1.1.4 (https://github.com/bramstein/promis)
     */

    var RESOLVED = 0;
    var REJECTED = 1;
    var PENDING = 2;

    var async = 'setImmediate' in window ? setImmediate : setTimeout;

    function PromiseFn(executor) {

        this.state = PENDING;
        this.value = undefined;
        this.deferred = [];

        var promise = this;

        try {
            executor(
                function (x) {
                    promise.resolve(x);
                },
                function (r) {
                    promise.reject(r);
                }
            );
        } catch (e) {
            promise.reject(e);
        }
    }

    PromiseFn.reject = function (r) {
        return new PromiseFn(function (resolve, reject) {
            reject(r);
        });
    };

    PromiseFn.resolve = function (x) {
        return new PromiseFn(function (resolve, reject) {
            resolve(x);
        });
    };

    PromiseFn.all = function all(iterable) {
        return new PromiseFn(function (resolve, reject) {
            var result = [];
            var count = 0;

            if (iterable.length === 0) {
                resolve(result);
            }

            function resolver(i) {
                return function (x) {
                    result[i] = x;
                    count += 1;

                    if (count === iterable.length) {
                        resolve(result);
                    }
                };
            }

            for (var i = 0; i < iterable.length; i += 1) {
                PromiseFn.resolve(iterable[i]).then(resolver(i), reject);
            }
        });
    };

    PromiseFn.race = function race(iterable) {
        return new PromiseFn(function (resolve, reject) {
            for (var i = 0; i < iterable.length; i += 1) {
                PromiseFn.resolve(iterable[i]).then(resolve, reject);
            }
        });
    };

    var p = PromiseFn.prototype;

    p.resolve = function resolve(x) {
        var promise = this;

        if (promise.state === PENDING) {
            if (x === promise) {
                throw new TypeError('Promise settled with itself.');
            }

            var called = false;

            try {
                var then = x && x.then;

                if (x !== null && isObject(x) && isFunction(then)) {
                    then.call(
                        x,
                        function (x) {
                            if (!called) {
                                promise.resolve(x);
                            }
                            called = true;
                        },
                        function (r) {
                            if (!called) {
                                promise.reject(r);
                            }
                            called = true;
                        }
                    );
                    return;
                }
            } catch (e) {
                if (!called) {
                    promise.reject(e);
                }
                return;
            }

            promise.state = RESOLVED;
            promise.value = x;
            promise.notify();
        }
    };

    p.reject = function reject(reason) {
        var promise = this;

        if (promise.state === PENDING) {
            if (reason === promise) {
                throw new TypeError('Promise settled with itself.');
            }

            promise.state = REJECTED;
            promise.value = reason;
            promise.notify();
        }
    };

    p.notify = function notify() {
        var this$1 = this;

        async(function () {
            if (this$1.state !== PENDING) {
                while (this$1.deferred.length) {
                    var ref = this$1.deferred.shift();
                    var onResolved = ref[0];
                    var onRejected = ref[1];
                    var resolve = ref[2];
                    var reject = ref[3];

                    try {
                        if (this$1.state === RESOLVED) {
                            if (isFunction(onResolved)) {
                                resolve(onResolved.call(undefined, this$1.value));
                            } else {
                                resolve(this$1.value);
                            }
                        } else if (this$1.state === REJECTED) {
                            if (isFunction(onRejected)) {
                                resolve(onRejected.call(undefined, this$1.value));
                            } else {
                                reject(this$1.value);
                            }
                        }
                    } catch (e) {
                        reject(e);
                    }
                }
            }
        });
    };

    p.then = function then(onResolved, onRejected) {
        var this$1 = this;

        return new PromiseFn(function (resolve, reject) {
            this$1.deferred.push([onResolved, onRejected, resolve, reject]);
            this$1.notify();
        });
    };

    p.catch = function (onRejected) {
        return this.then(undefined, onRejected);
    };

    function ajax(url, options) {
        return new Promise(function (resolve, reject) {

            var env = assign({
                data: null,
                method: 'GET',
                headers: {},
                xhr: new XMLHttpRequest(),
                beforeSend: noop,
                responseType: ''
            }, options);

            env.beforeSend(env);

            var xhr = env.xhr;

            for (var prop in env) {
                if (prop in xhr) {
                    try {

                        xhr[prop] = env[prop];

                    } catch (e) {}
                }
            }

            xhr.open(env.method.toUpperCase(), url);

            for (var header in env.headers) {
                xhr.setRequestHeader(header, env.headers[header]);
            }

            on(xhr, 'load', function () {

                if (xhr.status === 0 || xhr.status >= 200 && xhr.status < 300 || xhr.status === 304) {
                    resolve(xhr);
                } else {
                    reject(assign(Error(xhr.statusText), {
                        xhr: xhr,
                        status: xhr.status
                    }));
                }

            });

            on(xhr, 'error', function () { return reject(assign(Error('Network Error'), {xhr: xhr})); });
            on(xhr, 'timeout', function () { return reject(assign(Error('Network Timeout'), {xhr: xhr})); });

            xhr.send(env.data);
        });
    }

    function getImage(src, srcset, sizes) {

        return new Promise(function (resolve, reject) {
            var img = new Image();

            img.onerror = reject;
            img.onload = function () { return resolve(img); };

            sizes && (img.sizes = sizes);
            srcset && (img.srcset = srcset);
            img.src = src;
        });

    }

    function ready(fn) {

        if (document.readyState !== 'loading') {
            fn();
            return;
        }

        var unbind = on(document, 'DOMContentLoaded', function () {
            unbind();
            fn();
        });
    }

    function index(element, ref) {
        return ref
            ? toNodes(element).indexOf(toNode(ref))
            : children(parent(element)).indexOf(element);
    }

    function getIndex(i, elements, current, finite) {
        if ( current === void 0 ) current = 0;
        if ( finite === void 0 ) finite = false;


        elements = toNodes(elements);

        var length = elements.length;

        i = isNumeric(i)
            ? toNumber(i)
            : i === 'next'
                ? current + 1
                : i === 'previous'
                    ? current - 1
                    : index(elements, i);

        if (finite) {
            return clamp(i, 0, length - 1);
        }

        i %= length;

        return i < 0 ? i + length : i;
    }

    function empty(element) {
        element = $(element);
        element.innerHTML = '';
        return element;
    }

    function html(parent, html) {
        parent = $(parent);
        return isUndefined(html)
            ? parent.innerHTML
            : append(parent.hasChildNodes() ? empty(parent) : parent, html);
    }

    function prepend(parent, element) {

        parent = $(parent);

        if (!parent.hasChildNodes()) {
            return append(parent, element);
        } else {
            return insertNodes(element, function (element) { return parent.insertBefore(element, parent.firstChild); });
        }
    }

    function append(parent, element) {
        parent = $(parent);
        return insertNodes(element, function (element) { return parent.appendChild(element); });
    }

    function before(ref, element) {
        ref = $(ref);
        return insertNodes(element, function (element) { return ref.parentNode.insertBefore(element, ref); });
    }

    function after(ref, element) {
        ref = $(ref);
        return insertNodes(element, function (element) { return ref.nextSibling
            ? before(ref.nextSibling, element)
            : append(ref.parentNode, element); }
        );
    }

    function insertNodes(element, fn) {
        element = isString(element) ? fragment(element) : element;
        return element
            ? 'length' in element
                ? toNodes(element).map(fn)
                : fn(element)
            : null;
    }

    function remove(element) {
        toNodes(element).map(function (element) { return element.parentNode && element.parentNode.removeChild(element); });
    }

    function wrapAll(element, structure) {

        structure = toNode(before(element, structure));

        while (structure.firstChild) {
            structure = structure.firstChild;
        }

        append(structure, element);

        return structure;
    }

    function wrapInner(element, structure) {
        return toNodes(toNodes(element).map(function (element) { return element.hasChildNodes ? wrapAll(toNodes(element.childNodes), structure) : append(element, structure); }
        ));
    }

    function unwrap(element) {
        toNodes(element)
            .map(parent)
            .filter(function (value, index, self) { return self.indexOf(value) === index; })
            .forEach(function (parent) {
                before(parent, parent.childNodes);
                remove(parent);
            });
    }

    var fragmentRe = /^\s*<(\w+|!)[^>]*>/;
    var singleTagRe = /^<(\w+)\s*\/?>(?:<\/\1>)?$/;

    function fragment(html) {

        var matches = singleTagRe.exec(html);
        if (matches) {
            return document.createElement(matches[1]);
        }

        var container = document.createElement('div');
        if (fragmentRe.test(html)) {
            container.insertAdjacentHTML('beforeend', html.trim());
        } else {
            container.textContent = html;
        }

        return container.childNodes.length > 1 ? toNodes(container.childNodes) : container.firstChild;

    }

    function apply(node, fn) {

        if (!isElement(node)) {
            return;
        }

        fn(node);
        node = node.firstElementChild;
        while (node) {
            var next = node.nextElementSibling;
            apply(node, fn);
            node = next;
        }
    }

    function $(selector, context) {
        return !isString(selector)
            ? toNode(selector)
            : isHtml(selector)
                ? toNode(fragment(selector))
                : find(selector, context);
    }

    function $$(selector, context) {
        return !isString(selector)
            ? toNodes(selector)
            : isHtml(selector)
                ? toNodes(fragment(selector))
                : findAll(selector, context);
    }

    function isHtml(str) {
        return str[0] === '<' || str.match(/^\s*</);
    }

    function addClass(element) {
        var args = [], len = arguments.length - 1;
        while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];

        apply$1(element, args, 'add');
    }

    function removeClass(element) {
        var args = [], len = arguments.length - 1;
        while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];

        apply$1(element, args, 'remove');
    }

    function removeClasses(element, cls) {
        attr(element, 'class', function (value) { return (value || '').replace(new RegExp(("\\b" + cls + "\\b"), 'g'), ''); });
    }

    function replaceClass(element) {
        var args = [], len = arguments.length - 1;
        while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];

        args[0] && removeClass(element, args[0]);
        args[1] && addClass(element, args[1]);
    }

    function hasClass(element, cls) {
        return cls && toNodes(element).some(function (element) { return element.classList.contains(cls.split(' ')[0]); });
    }

    function toggleClass(element) {
        var args = [], len = arguments.length - 1;
        while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];


        if (!args.length) {
            return;
        }

        args = getArgs$1(args);

        var force = !isString(last(args)) ? args.pop() : []; // in iOS 9.3 force === undefined evaluates to false

        args = args.filter(Boolean);

        toNodes(element).forEach(function (ref) {
            var classList = ref.classList;

            for (var i = 0; i < args.length; i++) {
                supports.Force
                    ? classList.toggle.apply(classList, [args[i]].concat(force))
                    : (classList[(!isUndefined(force) ? force : !classList.contains(args[i])) ? 'add' : 'remove'](args[i]));
            }
        });

    }

    function apply$1(element, args, fn) {
        args = getArgs$1(args).filter(Boolean);

        args.length && toNodes(element).forEach(function (ref) {
            var classList = ref.classList;

            supports.Multiple
                ? classList[fn].apply(classList, args)
                : args.forEach(function (cls) { return classList[fn](cls); });
        });
    }

    function getArgs$1(args) {
        return args.reduce(function (args, arg) { return args.concat.call(args, isString(arg) && includes(arg, ' ') ? arg.trim().split(' ') : arg); }
            , []);
    }

    // IE 11
    var supports = {

        get Multiple() {
            return this.get('_multiple');
        },

        get Force() {
            return this.get('_force');
        },

        get: function(key) {

            if (!hasOwn(this, key)) {
                var ref = document.createElement('_');
                var classList = ref.classList;
                classList.add('a', 'b');
                classList.toggle('c', false);
                this._multiple = classList.contains('b');
                this._force = !classList.contains('c');
            }

            return this[key];
        }

    };

    var cssNumber = {
        'animation-iteration-count': true,
        'column-count': true,
        'fill-opacity': true,
        'flex-grow': true,
        'flex-shrink': true,
        'font-weight': true,
        'line-height': true,
        'opacity': true,
        'order': true,
        'orphans': true,
        'stroke-dasharray': true,
        'stroke-dashoffset': true,
        'widows': true,
        'z-index': true,
        'zoom': true
    };

    function css(element, property, value) {

        return toNodes(element).map(function (element) {

            if (isString(property)) {

                property = propName(property);

                if (isUndefined(value)) {
                    return getStyle(element, property);
                } else if (!value && !isNumber(value)) {
                    element.style.removeProperty(property);
                } else {
                    element.style[property] = isNumeric(value) && !cssNumber[property] ? (value + "px") : value;
                }

            } else if (isArray(property)) {

                var styles = getStyles(element);

                return property.reduce(function (props, property) {
                    props[property] = styles[propName(property)];
                    return props;
                }, {});

            } else if (isObject(property)) {
                each(property, function (value, property) { return css(element, property, value); });
            }

            return element;

        })[0];

    }

    function getStyles(element, pseudoElt) {
        element = toNode(element);
        return element.ownerDocument.defaultView.getComputedStyle(element, pseudoElt);
    }

    function getStyle(element, property, pseudoElt) {
        return getStyles(element, pseudoElt)[property];
    }

    var vars = {};

    function getCssVar(name) {

        var docEl = document.documentElement;

        if (!isIE) {
            return getStyles(docEl).getPropertyValue(("--uk-" + name));
        }

        if (!(name in vars)) {

            /* usage in css: .uk-name:before { content:"xyz" } */

            var element = append(docEl, document.createElement('div'));

            addClass(element, ("uk-" + name));

            vars[name] = getStyle(element, 'content', ':before').replace(/^["'](.*)["']$/, '$1');

            remove(element);

        }

        return vars[name];

    }

    var cssProps = {};

    function propName(name) {

        var ret = cssProps[name];
        if (!ret) {
            ret = cssProps[name] = vendorPropName(name) || name;
        }
        return ret;
    }

    var cssPrefixes = ['webkit', 'moz', 'ms'];

    function vendorPropName(name) {

        name = hyphenate(name);

        var ref = document.documentElement;
        var style = ref.style;

        if (name in style) {
            return name;
        }

        var i = cssPrefixes.length, prefixedName;

        while (i--) {
            prefixedName = "-" + (cssPrefixes[i]) + "-" + name;
            if (prefixedName in style) {
                return prefixedName;
            }
        }
    }

    function transition(element, props, duration, timing) {
        if ( duration === void 0 ) duration = 400;
        if ( timing === void 0 ) timing = 'linear';


        return Promise.all(toNodes(element).map(function (element) { return new Promise(function (resolve, reject) {

                for (var name in props) {
                    var value = css(element, name);
                    if (value === '') {
                        css(element, name, value);
                    }
                }

                var timer = setTimeout(function () { return trigger(element, 'transitionend'); }, duration);

                once(element, 'transitionend transitioncanceled', function (ref) {
                    var type = ref.type;

                    clearTimeout(timer);
                    removeClass(element, 'uk-transition');
                    css(element, {
                        transitionProperty: '',
                        transitionDuration: '',
                        transitionTimingFunction: ''
                    });
                    type === 'transitioncanceled' ? reject() : resolve();
                }, {self: true});

                addClass(element, 'uk-transition');
                css(element, assign({
                    transitionProperty: Object.keys(props).map(propName).join(','),
                    transitionDuration: (duration + "ms"),
                    transitionTimingFunction: timing
                }, props));

            }); }
        ));

    }

    var Transition = {

        start: transition,

        stop: function(element) {
            trigger(element, 'transitionend');
            return Promise.resolve();
        },

        cancel: function(element) {
            trigger(element, 'transitioncanceled');
        },

        inProgress: function(element) {
            return hasClass(element, 'uk-transition');
        }

    };

    var animationPrefix = 'uk-animation-';
    var clsCancelAnimation = 'uk-cancel-animation';

    function animate(element, animation, duration, origin, out) {
        var arguments$1 = arguments;
        if ( duration === void 0 ) duration = 200;


        return Promise.all(toNodes(element).map(function (element) { return new Promise(function (resolve, reject) {

                if (hasClass(element, clsCancelAnimation)) {
                    requestAnimationFrame(function () { return Promise.resolve().then(function () { return animate.apply(void 0, arguments$1).then(resolve, reject); }
                        ); }
                    );
                    return;
                }

                var cls = animation + " " + animationPrefix + (out ? 'leave' : 'enter');

                if (startsWith(animation, animationPrefix)) {

                    if (origin) {
                        cls += " uk-transform-origin-" + origin;
                    }

                    if (out) {
                        cls += " " + animationPrefix + "reverse";
                    }

                }

                reset();

                once(element, 'animationend animationcancel', function (ref) {
                    var type = ref.type;


                    var hasReset = false;

                    if (type === 'animationcancel') {
                        reject();
                        reset();
                    } else {
                        resolve();
                        Promise.resolve().then(function () {
                            hasReset = true;
                            reset();
                        });
                    }

                    requestAnimationFrame(function () {
                        if (!hasReset) {
                            addClass(element, clsCancelAnimation);

                            requestAnimationFrame(function () { return removeClass(element, clsCancelAnimation); });
                        }
                    });

                }, {self: true});

                css(element, 'animationDuration', (duration + "ms"));
                addClass(element, cls);

                function reset() {
                    css(element, 'animationDuration', '');
                    removeClasses(element, (animationPrefix + "\\S*"));
                }

            }); }
        ));

    }

    var inProgress = new RegExp((animationPrefix + "(enter|leave)"));
    var Animation = {

        in: function(element, animation, duration, origin) {
            return animate(element, animation, duration, origin, false);
        },

        out: function(element, animation, duration, origin) {
            return animate(element, animation, duration, origin, true);
        },

        inProgress: function(element) {
            return inProgress.test(attr(element, 'class'));
        },

        cancel: function(element) {
            trigger(element, 'animationcancel');
        }

    };

    var dirs = {
        width: ['x', 'left', 'right'],
        height: ['y', 'top', 'bottom']
    };

    function positionAt(element, target, elAttach, targetAttach, elOffset, targetOffset, flip, boundary) {

        elAttach = getPos(elAttach);
        targetAttach = getPos(targetAttach);

        var flipped = {element: elAttach, target: targetAttach};

        if (!element || !target) {
            return flipped;
        }

        var dim = getDimensions(element);
        var targetDim = getDimensions(target);
        var position = targetDim;

        moveTo(position, elAttach, dim, -1);
        moveTo(position, targetAttach, targetDim, 1);

        elOffset = getOffsets(elOffset, dim.width, dim.height);
        targetOffset = getOffsets(targetOffset, targetDim.width, targetDim.height);

        elOffset['x'] += targetOffset['x'];
        elOffset['y'] += targetOffset['y'];

        position.left += elOffset['x'];
        position.top += elOffset['y'];

        if (flip) {

            var boundaries = [getDimensions(toWindow(element))];

            if (boundary) {
                boundaries.unshift(getDimensions(boundary));
            }

            each(dirs, function (ref, prop) {
                var dir = ref[0];
                var align = ref[1];
                var alignFlip = ref[2];


                if (!(flip === true || includes(flip, dir))) {
                    return;
                }

                boundaries.some(function (boundary) {

                    var elemOffset = elAttach[dir] === align
                        ? -dim[prop]
                        : elAttach[dir] === alignFlip
                            ? dim[prop]
                            : 0;

                    var targetOffset = targetAttach[dir] === align
                        ? targetDim[prop]
                        : targetAttach[dir] === alignFlip
                            ? -targetDim[prop]
                            : 0;

                    if (position[align] < boundary[align] || position[align] + dim[prop] > boundary[alignFlip]) {

                        var centerOffset = dim[prop] / 2;
                        var centerTargetOffset = targetAttach[dir] === 'center' ? -targetDim[prop] / 2 : 0;

                        return elAttach[dir] === 'center' && (
                            apply(centerOffset, centerTargetOffset)
                            || apply(-centerOffset, -centerTargetOffset)
                        ) || apply(elemOffset, targetOffset);

                    }

                    function apply(elemOffset, targetOffset) {

                        var newVal = position[align] + elemOffset + targetOffset - elOffset[dir] * 2;

                        if (newVal >= boundary[align] && newVal + dim[prop] <= boundary[alignFlip]) {
                            position[align] = newVal;

                            ['element', 'target'].forEach(function (el) {
                                flipped[el][dir] = !elemOffset
                                    ? flipped[el][dir]
                                    : flipped[el][dir] === dirs[prop][1]
                                        ? dirs[prop][2]
                                        : dirs[prop][1];
                            });

                            return true;
                        }

                    }

                });

            });
        }

        offset(element, position);

        return flipped;
    }

    function offset(element, coordinates) {

        if (!coordinates) {
            return getDimensions(element);
        }

        var currentOffset = offset(element);
        var pos = css(element, 'position');

        ['left', 'top'].forEach(function (prop) {
            if (prop in coordinates) {
                var value = css(element, prop);
                css(element, prop, coordinates[prop] - currentOffset[prop]
                    + toFloat(pos === 'absolute' && value === 'auto'
                        ? position(element)[prop]
                        : value)
                );
            }
        });
    }

    function getDimensions(element) {

        if (!element) {
            return {};
        }

        var ref = toWindow(element);
        var top = ref.pageYOffset;
        var left = ref.pageXOffset;

        if (isWindow(element)) {

            var height = element.innerHeight;
            var width = element.innerWidth;

            return {
                top: top,
                left: left,
                height: height,
                width: width,
                bottom: top + height,
                right: left + width
            };
        }

        var style, hidden;

        if (!isVisible(element) && css(element, 'display') === 'none') {

            style = attr(element, 'style');
            hidden = attr(element, 'hidden');

            attr(element, {
                style: ((style || '') + ";display:block !important;"),
                hidden: null
            });
        }

        element = toNode(element);

        var rect = element.getBoundingClientRect();

        if (!isUndefined(style)) {
            attr(element, {style: style, hidden: hidden});
        }

        return {
            height: rect.height,
            width: rect.width,
            top: rect.top + top,
            left: rect.left + left,
            bottom: rect.bottom + top,
            right: rect.right + left
        };
    }

    function position(element, parent) {

        parent = parent || toNode(element).offsetParent || toWindow(element).document.documentElement;

        var elementOffset = offset(element);
        var parentOffset = offset(parent);

        return {
            top: elementOffset.top - parentOffset.top - toFloat(css(parent, 'borderTopWidth')),
            left: elementOffset.left - parentOffset.left - toFloat(css(parent, 'borderLeftWidth'))
        };
    }

    function offsetPosition(element) {
        var offset = [0, 0];

        element = toNode(element);

        do {

            offset[0] += element.offsetTop;
            offset[1] += element.offsetLeft;

            if (css(element, 'position') === 'fixed') {
                var win = toWindow(element);
                offset[0] += win.pageYOffset;
                offset[1] += win.pageXOffset;
                return offset;
            }

        } while ((element = element.offsetParent));

        return offset;
    }

    var height = dimension('height');
    var width = dimension('width');

    function dimension(prop) {
        var propName = ucfirst(prop);
        return function (element, value) {

            if (isUndefined(value)) {

                if (isWindow(element)) {
                    return element[("inner" + propName)];
                }

                if (isDocument(element)) {
                    var doc = element.documentElement;
                    return Math.max(doc[("offset" + propName)], doc[("scroll" + propName)]);
                }

                element = toNode(element);

                value = css(element, prop);
                value = value === 'auto' ? element[("offset" + propName)] : toFloat(value) || 0;

                return value - boxModelAdjust(element, prop);

            } else {

                css(element, prop, !value && value !== 0
                    ? ''
                    : +value + boxModelAdjust(element, prop) + 'px'
                );

            }

        };
    }

    function boxModelAdjust(element, prop, sizing) {
        if ( sizing === void 0 ) sizing = 'border-box';

        return css(element, 'boxSizing') === sizing
            ? dirs[prop].slice(1).map(ucfirst).reduce(function (value, prop) { return value
                + toFloat(css(element, ("padding" + prop)))
                + toFloat(css(element, ("border" + prop + "Width"))); }
                , 0)
            : 0;
    }

    function moveTo(position, attach, dim, factor) {
        each(dirs, function (ref, prop) {
            var dir = ref[0];
            var align = ref[1];
            var alignFlip = ref[2];

            if (attach[dir] === alignFlip) {
                position[align] += dim[prop] * factor;
            } else if (attach[dir] === 'center') {
                position[align] += dim[prop] * factor / 2;
            }
        });
    }

    function getPos(pos) {

        var x = /left|center|right/;
        var y = /top|center|bottom/;

        pos = (pos || '').split(' ');

        if (pos.length === 1) {
            pos = x.test(pos[0])
                ? pos.concat('center')
                : y.test(pos[0])
                    ? ['center'].concat(pos)
                    : ['center', 'center'];
        }

        return {
            x: x.test(pos[0]) ? pos[0] : 'center',
            y: y.test(pos[1]) ? pos[1] : 'center'
        };
    }

    function getOffsets(offsets, width, height) {

        var ref = (offsets || '').split(' ');
        var x = ref[0];
        var y = ref[1];

        return {
            x: x ? toFloat(x) * (endsWith(x, '%') ? width / 100 : 1) : 0,
            y: y ? toFloat(y) * (endsWith(y, '%') ? height / 100 : 1) : 0
        };
    }

    function flipPosition(pos) {
        switch (pos) {
            case 'left':
                return 'right';
            case 'right':
                return 'left';
            case 'top':
                return 'bottom';
            case 'bottom':
                return 'top';
            default:
                return pos;
        }
    }

    function toPx(value, property, element) {
        if ( property === void 0 ) property = 'width';
        if ( element === void 0 ) element = window;

        return isNumeric(value)
            ? +value
            : endsWith(value, 'vh')
                ? percent(height(toWindow(element)), value)
                : endsWith(value, 'vw')
                    ? percent(width(toWindow(element)), value)
                    : endsWith(value, '%')
                        ? percent(getDimensions(element)[property], value)
                        : toFloat(value);
    }

    function percent(base, value) {
        return base * toFloat(value) / 100;
    }

    /*
        Based on:
        Copyright (c) 2016 Wilson Page wilsonpage@me.com
        https://github.com/wilsonpage/fastdom
    */

    var fastdom = {

        reads: [],
        writes: [],

        read: function(task) {
            this.reads.push(task);
            scheduleFlush();
            return task;
        },

        write: function(task) {
            this.writes.push(task);
            scheduleFlush();
            return task;
        },

        clear: function(task) {
            return remove$1(this.reads, task) || remove$1(this.writes, task);
        },

        flush: flush

    };

    function flush(recursion) {
        if ( recursion === void 0 ) recursion = 1;

        runTasks(fastdom.reads);
        runTasks(fastdom.writes.splice(0, fastdom.writes.length));

        fastdom.scheduled = false;

        if (fastdom.reads.length || fastdom.writes.length) {
            scheduleFlush(recursion + 1);
        }
    }

    var RECURSION_LIMIT = 5;
    function scheduleFlush(recursion) {
        if (!fastdom.scheduled) {
            fastdom.scheduled = true;
            if (recursion > RECURSION_LIMIT) {
                throw new Error('Maximum recursion limit reached.');
            } else if (recursion) {
                Promise.resolve().then(function () { return flush(recursion); });
            } else {
                requestAnimationFrame(function () { return flush(); });
            }
        }
    }

    function runTasks(tasks) {
        var task;
        while ((task = tasks.shift())) {
            task();
        }
    }

    function remove$1(array, item) {
        var index = array.indexOf(item);
        return !!~index && !!array.splice(index, 1);
    }

    function MouseTracker() {}

    MouseTracker.prototype = {

        positions: [],

        init: function() {
            var this$1 = this;


            this.positions = [];

            var position;
            this.unbind = on(document, 'mousemove', function (e) { return position = getEventPos(e); });
            this.interval = setInterval(function () {

                if (!position) {
                    return;
                }

                this$1.positions.push(position);

                if (this$1.positions.length > 5) {
                    this$1.positions.shift();
                }
            }, 50);

        },

        cancel: function() {
            this.unbind && this.unbind();
            this.interval && clearInterval(this.interval);
        },

        movesTo: function(target) {

            if (this.positions.length < 2) {
                return false;
            }

            var p = target.getBoundingClientRect();
            var left = p.left;
            var right = p.right;
            var top = p.top;
            var bottom = p.bottom;

            var ref = this.positions;
            var prevPosition = ref[0];
            var position = last(this.positions);
            var path = [prevPosition, position];

            if (pointInRect(position, p)) {
                return false;
            }

            var diagonals = [[{x: left, y: top}, {x: right, y: bottom}], [{x: left, y: bottom}, {x: right, y: top}]];

            return diagonals.some(function (diagonal) {
                var intersection = intersect(path, diagonal);
                return intersection && pointInRect(intersection, p);
            });
        }

    };

    // Inspired by http://paulbourke.net/geometry/pointlineplane/
    function intersect(ref, ref$1) {
        var ref_0 = ref[0];
        var x1 = ref_0.x;
        var y1 = ref_0.y;
        var ref_1 = ref[1];
        var x2 = ref_1.x;
        var y2 = ref_1.y;
        var ref$1_0 = ref$1[0];
        var x3 = ref$1_0.x;
        var y3 = ref$1_0.y;
        var ref$1_1 = ref$1[1];
        var x4 = ref$1_1.x;
        var y4 = ref$1_1.y;


        var denominator = (y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1);

        // Lines are parallel
        if (denominator === 0) {
            return false;
        }

        var ua = ((x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3)) / denominator;

        if (ua < 0) {
            return false;
        }

        // Return a object with the x and y coordinates of the intersection
        return {x: x1 + ua * (x2 - x1), y: y1 + ua * (y2 - y1)};
    }

    var strats = {};

    strats.events =
    strats.created =
    strats.beforeConnect =
    strats.connected =
    strats.beforeDisconnect =
    strats.disconnected =
    strats.destroy = concatStrat;

    // args strategy
    strats.args = function (parentVal, childVal) {
        return childVal !== false && concatStrat(childVal || parentVal);
    };

    // update strategy
    strats.update = function (parentVal, childVal) {
        return sortBy(concatStrat(parentVal, isFunction(childVal) ? {read: childVal} : childVal), 'order');
    };

    // property strategy
    strats.props = function (parentVal, childVal) {

        if (isArray(childVal)) {
            childVal = childVal.reduce(function (value, key) {
                value[key] = String;
                return value;
            }, {});
        }

        return strats.methods(parentVal, childVal);
    };

    // extend strategy
    strats.computed =
    strats.methods = function (parentVal, childVal) {
        return childVal
            ? parentVal
                ? assign({}, parentVal, childVal)
                : childVal
            : parentVal;
    };

    // data strategy
    strats.data = function (parentVal, childVal, vm) {

        if (!vm) {

            if (!childVal) {
                return parentVal;
            }

            if (!parentVal) {
                return childVal;
            }

            return function (vm) {
                return mergeFnData(parentVal, childVal, vm);
            };

        }

        return mergeFnData(parentVal, childVal, vm);
    };

    function mergeFnData(parentVal, childVal, vm) {
        return strats.computed(
            isFunction(parentVal)
                ? parentVal.call(vm, vm)
                : parentVal,
            isFunction(childVal)
                ? childVal.call(vm, vm)
                : childVal
        );
    }

    // concat strategy
    function concatStrat(parentVal, childVal) {

        parentVal = parentVal && !isArray(parentVal) ? [parentVal] : parentVal;

        return childVal
            ? parentVal
                ? parentVal.concat(childVal)
                : isArray(childVal)
                    ? childVal
                    : [childVal]
            : parentVal;
    }

    // default strategy
    function defaultStrat(parentVal, childVal) {
        return isUndefined(childVal) ? parentVal : childVal;
    }

    function mergeOptions(parent, child, vm) {

        var options = {};

        if (isFunction(child)) {
            child = child.options;
        }

        if (child.extends) {
            parent = mergeOptions(parent, child.extends, vm);
        }

        if (child.mixins) {
            for (var i = 0, l = child.mixins.length; i < l; i++) {
                parent = mergeOptions(parent, child.mixins[i], vm);
            }
        }

        for (var key in parent) {
            mergeKey(key);
        }

        for (var key$1 in child) {
            if (!hasOwn(parent, key$1)) {
                mergeKey(key$1);
            }
        }

        function mergeKey(key) {
            options[key] = (strats[key] || defaultStrat)(parent[key], child[key], vm);
        }

        return options;
    }

    function parseOptions(options, args) {
        var obj;

        if ( args === void 0 ) args = [];

        try {

            return !options
                ? {}
                : startsWith(options, '{')
                    ? JSON.parse(options)
                    : args.length && !includes(options, ':')
                        ? (( obj = {}, obj[args[0]] = options, obj ))
                        : options.split(';').reduce(function (options, option) {
                            var ref = option.split(/:(.*)/);
                            var key = ref[0];
                            var value = ref[1];
                            if (key && !isUndefined(value)) {
                                options[key.trim()] = value.trim();
                            }
                            return options;
                        }, {});

        } catch (e) {
            return {};
        }

    }

    var id = 0;

    var Player = function(el) {
        this.id = ++id;
        this.el = toNode(el);
    };

    Player.prototype.isVideo = function () {
        return this.isYoutube() || this.isVimeo() || this.isHTML5();
    };

    Player.prototype.isHTML5 = function () {
        return this.el.tagName === 'VIDEO';
    };

    Player.prototype.isIFrame = function () {
        return this.el.tagName === 'IFRAME';
    };

    Player.prototype.isYoutube = function () {
        return this.isIFrame() && !!this.el.src.match(/\/\/.*?youtube(-nocookie)?\.[a-z]+\/(watch\?v=[^&\s]+|embed)|youtu\.be\/.*/);
    };

    Player.prototype.isVimeo = function () {
        return this.isIFrame() && !!this.el.src.match(/vimeo\.com\/video\/.*/);
    };

    Player.prototype.enableApi = function () {
            var this$1 = this;


        if (this.ready) {
            return this.ready;
        }

        var youtube = this.isYoutube();
        var vimeo = this.isVimeo();

        var poller;

        if (youtube || vimeo) {

            return this.ready = new Promise(function (resolve) {

                once(this$1.el, 'load', function () {
                    if (youtube) {
                        var listener = function () { return post(this$1.el, {event: 'listening', id: this$1.id}); };
                        poller = setInterval(listener, 100);
                        listener();
                    }
                });

                listen(function (data) { return youtube && data.id === this$1.id && data.event === 'onReady' || vimeo && Number(data.player_id) === this$1.id; })
                    .then(function () {
                        resolve();
                        poller && clearInterval(poller);
                    });

                attr(this$1.el, 'src', ("" + (this$1.el.src) + (includes(this$1.el.src, '?') ? '&' : '?') + (youtube ? 'enablejsapi=1' : ("api=1&player_id=" + (this$1.id)))));

            });

        }

        return Promise.resolve();

    };

    Player.prototype.play = function () {
            var this$1 = this;


        if (!this.isVideo()) {
            return;
        }

        if (this.isIFrame()) {
            this.enableApi().then(function () { return post(this$1.el, {func: 'playVideo', method: 'play'}); });
        } else if (this.isHTML5()) {
            try {
                var promise = this.el.play();

                if (promise) {
                    promise.catch(noop);
                }
            } catch (e) {}
        }
    };

    Player.prototype.pause = function () {
            var this$1 = this;


        if (!this.isVideo()) {
            return;
        }

        if (this.isIFrame()) {
            this.enableApi().then(function () { return post(this$1.el, {func: 'pauseVideo', method: 'pause'}); });
        } else if (this.isHTML5()) {
            this.el.pause();
        }
    };

    Player.prototype.mute = function () {
            var this$1 = this;


        if (!this.isVideo()) {
            return;
        }

        if (this.isIFrame()) {
            this.enableApi().then(function () { return post(this$1.el, {func: 'mute', method: 'setVolume', value: 0}); });
        } else if (this.isHTML5()) {
            this.el.muted = true;
            attr(this.el, 'muted', '');
        }

    };

    function post(el, cmd) {
        try {
            el.contentWindow.postMessage(JSON.stringify(assign({event: 'command'}, cmd)), '*');
        } catch (e) {}
    }

    function listen(cb) {

        return new Promise(function (resolve) { return once(window, 'message', function (_, data) { return resolve(data); }, false, function (ref) {
                var data = ref.data;


                if (!data || !isString(data)) {
                    return;
                }

                try {
                    data = JSON.parse(data);
                } catch (e) {
                    return;
                }

                return data && cb(data);

            }); }

        );

    }

    function isInView(element, offsetTop, offsetLeft) {
        if ( offsetTop === void 0 ) offsetTop = 0;
        if ( offsetLeft === void 0 ) offsetLeft = 0;


        if (!isVisible(element)) {
            return false;
        }

        var parents = overflowParents(element).concat(element);

        for (var i = 0; i < parents.length - 1; i++) {
            var ref = offset(getViewport(parents[i]));
            var top = ref.top;
            var left = ref.left;
            var bottom = ref.bottom;
            var right = ref.right;
            var vp = {
                top: top - offsetTop,
                left: left - offsetLeft,
                bottom: bottom + offsetTop,
                right: right + offsetLeft
            };

            var client = offset(parents[i + 1]);

            if (!intersectRect(client, vp) && !pointInRect({x: client.left, y: client.top}, vp)) {
                return false;
            }
        }

        return true;
    }

    function scrollTop(element, top) {

        if (isWindow(element) || isDocument(element)) {
            element = getScrollingElement(element);
        } else {
            element = toNode(element);
        }

        element.scrollTop = top;
    }

    function scrollIntoView(element, ref) {
        if ( ref === void 0 ) ref = {};
        var offsetBy = ref.offset; if ( offsetBy === void 0 ) offsetBy = 0;


        if (!isVisible(element)) {
            return;
        }

        var parents = overflowParents(element).concat(element);

        var promise = Promise.resolve();
        var loop = function ( i ) {
            promise = promise.then(function () { return new Promise(function (resolve) {

                    var scrollElement = parents[i];
                    var element = parents[i + 1];

                    var scroll = scrollElement.scrollTop;
                    var top = Math.ceil(position(element, getViewport(scrollElement)).top - offsetBy);
                    var duration = getDuration(Math.abs(top));

                    var start = Date.now();
                    var step = function () {

                        var percent = ease(clamp((Date.now() - start) / duration));

                        scrollTop(scrollElement, scroll + top * percent);

                        // scroll more if we have not reached our destination
                        if (percent !== 1) {
                            requestAnimationFrame(step);
                        } else {
                            resolve();
                        }

                    };

                    step();
                }); }
            );
        };

        for (var i = 0; i < parents.length - 1; i++) loop( i );

        return promise;

        function getDuration(dist) {
            return 40 * Math.pow(dist, .375);
        }

        function ease(k) {
            return 0.5 * (1 - Math.cos(Math.PI * k));
        }

    }

    function scrolledOver(element, heightOffset) {
        if ( heightOffset === void 0 ) heightOffset = 0;


        if (!isVisible(element)) {
            return 0;
        }

        var scrollElement = last(scrollParents(element));
        var scrollHeight = scrollElement.scrollHeight;
        var scrollTop = scrollElement.scrollTop;
        var viewport = getViewport(scrollElement);
        var viewportHeight = offset(viewport).height;
        var viewportTop = offsetPosition(element)[0] - scrollTop - offsetPosition(scrollElement)[0];
        var viewportDist = Math.min(viewportHeight, viewportTop + scrollTop);

        var top = viewportTop - viewportDist;
        var dist = Math.min(
            offset(element).height + heightOffset + viewportDist,
            scrollHeight - (viewportTop + scrollTop),
            scrollHeight - viewportHeight
        );

        return clamp(-1 * top / dist);
    }

    function scrollParents(element, overflowRe) {
        if ( overflowRe === void 0 ) overflowRe = /auto|scroll/;

        var scrollEl = getScrollingElement(element);
        var scrollParents = parents(element).filter(function (parent) { return parent === scrollEl
            || overflowRe.test(css(parent, 'overflow'))
            && parent.scrollHeight > Math.round(offset(parent).height); }
        ).reverse();
        return scrollParents.length ? scrollParents : [scrollEl];
    }

    function getViewport(scrollElement) {
        return scrollElement === getScrollingElement(scrollElement) ? window : scrollElement;
    }

    function overflowParents(element) {
        return scrollParents(element, /auto|scroll|hidden/);
    }

    function getScrollingElement(element) {
        var ref = toWindow(element);
        var document = ref.document;
        return document.scrollingElement || document.documentElement;
    }

    var IntersectionObserver = 'IntersectionObserver' in window
        ? window.IntersectionObserver
        : /*@__PURE__*/(function () {
        function IntersectionObserverClass(callback, ref) {
            var this$1 = this;
            if ( ref === void 0 ) ref = {};
            var rootMargin = ref.rootMargin; if ( rootMargin === void 0 ) rootMargin = '0 0';


                this.targets = [];

                var ref$1 = (rootMargin || '0 0').split(' ').map(toFloat);
            var offsetTop = ref$1[0];
            var offsetLeft = ref$1[1];

                this.offsetTop = offsetTop;
                this.offsetLeft = offsetLeft;

                var pending;
                this.apply = function () {

                    if (pending) {
                        return;
                    }

                    pending = requestAnimationFrame(function () { return setTimeout(function () {
                        var records = this$1.takeRecords();

                        if (records.length) {
                            callback(records, this$1);
                        }

                        pending = false;
                    }); });

                };

                this.off = on(window, 'scroll resize load', this.apply, {passive: true, capture: true});

            }

            IntersectionObserverClass.prototype.takeRecords = function () {
                var this$1 = this;

                return this.targets.filter(function (entry) {

                    var inView = isInView(entry.target, this$1.offsetTop, this$1.offsetLeft);

                    if (entry.isIntersecting === null || inView ^ entry.isIntersecting) {
                        entry.isIntersecting = inView;
                        return true;
                    }

                });
            };

            IntersectionObserverClass.prototype.observe = function (target) {
                this.targets.push({
                    target: target,
                    isIntersecting: null
                });
                this.apply();
            };

            IntersectionObserverClass.prototype.disconnect = function () {
                this.targets = [];
                this.off();
            };

        return IntersectionObserverClass;
    }());

    var util = /*#__PURE__*/Object.freeze({
        __proto__: null,
        ajax: ajax,
        getImage: getImage,
        transition: transition,
        Transition: Transition,
        animate: animate,
        Animation: Animation,
        attr: attr,
        hasAttr: hasAttr,
        removeAttr: removeAttr,
        data: data,
        addClass: addClass,
        removeClass: removeClass,
        removeClasses: removeClasses,
        replaceClass: replaceClass,
        hasClass: hasClass,
        toggleClass: toggleClass,
        positionAt: positionAt,
        offset: offset,
        position: position,
        offsetPosition: offsetPosition,
        height: height,
        width: width,
        boxModelAdjust: boxModelAdjust,
        flipPosition: flipPosition,
        toPx: toPx,
        ready: ready,
        index: index,
        getIndex: getIndex,
        empty: empty,
        html: html,
        prepend: prepend,
        append: append,
        before: before,
        after: after,
        remove: remove,
        wrapAll: wrapAll,
        wrapInner: wrapInner,
        unwrap: unwrap,
        fragment: fragment,
        apply: apply,
        $: $,
        $$: $$,
        isIE: isIE,
        isRtl: isRtl,
        hasTouch: hasTouch,
        pointerDown: pointerDown,
        pointerMove: pointerMove,
        pointerUp: pointerUp,
        pointerEnter: pointerEnter,
        pointerLeave: pointerLeave,
        pointerCancel: pointerCancel,
        on: on,
        off: off,
        once: once,
        trigger: trigger,
        createEvent: createEvent,
        toEventTargets: toEventTargets,
        isTouch: isTouch,
        getEventPos: getEventPos,
        fastdom: fastdom,
        isVoidElement: isVoidElement,
        isVisible: isVisible,
        selInput: selInput,
        isInput: isInput,
        filter: filter,
        within: within,
        parents: parents,
        children: children,
        hasOwn: hasOwn,
        hyphenate: hyphenate,
        camelize: camelize,
        ucfirst: ucfirst,
        startsWith: startsWith,
        endsWith: endsWith,
        includes: includes,
        findIndex: findIndex,
        isArray: isArray,
        isFunction: isFunction,
        isObject: isObject,
        isPlainObject: isPlainObject,
        isWindow: isWindow,
        isDocument: isDocument,
        isJQuery: isJQuery,
        isNode: isNode,
        isElement: isElement,
        isNodeCollection: isNodeCollection,
        isBoolean: isBoolean,
        isString: isString,
        isNumber: isNumber,
        isNumeric: isNumeric,
        isEmpty: isEmpty,
        isUndefined: isUndefined,
        toBoolean: toBoolean,
        toNumber: toNumber,
        toFloat: toFloat,
        toNode: toNode,
        toNodes: toNodes,
        toWindow: toWindow,
        toList: toList,
        toMs: toMs,
        isEqual: isEqual,
        swap: swap,
        assign: assign,
        last: last,
        each: each,
        sortBy: sortBy,
        uniqueBy: uniqueBy,
        clamp: clamp,
        noop: noop,
        intersectRect: intersectRect,
        pointInRect: pointInRect,
        Dimensions: Dimensions,
        MouseTracker: MouseTracker,
        mergeOptions: mergeOptions,
        parseOptions: parseOptions,
        Player: Player,
        Promise: Promise,
        Deferred: Deferred,
        IntersectionObserver: IntersectionObserver,
        query: query,
        queryAll: queryAll,
        find: find,
        findAll: findAll,
        matches: matches,
        closest: closest,
        parent: parent,
        escape: escape,
        css: css,
        getStyles: getStyles,
        getStyle: getStyle,
        getCssVar: getCssVar,
        propName: propName,
        isInView: isInView,
        scrollTop: scrollTop,
        scrollIntoView: scrollIntoView,
        scrolledOver: scrolledOver,
        scrollParents: scrollParents,
        getViewport: getViewport
    });

    function globalAPI (UIkit) {

        var DATA = UIkit.data;

        UIkit.use = function (plugin) {

            if (plugin.installed) {
                return;
            }

            plugin.call(null, this);
            plugin.installed = true;

            return this;
        };

        UIkit.mixin = function (mixin, component) {
            component = (isString(component) ? UIkit.component(component) : component) || this;
            component.options = mergeOptions(component.options, mixin);
        };

        UIkit.extend = function (options) {

            options = options || {};

            var Super = this;
            var Sub = function UIkitComponent(options) {
                this._init(options);
            };

            Sub.prototype = Object.create(Super.prototype);
            Sub.prototype.constructor = Sub;
            Sub.options = mergeOptions(Super.options, options);

            Sub.super = Super;
            Sub.extend = Super.extend;

            return Sub;
        };

        UIkit.update = function (element, e) {

            element = element ? toNode(element) : document.body;

            parents(element).reverse().forEach(function (element) { return update(element[DATA], e); });
            apply(element, function (element) { return update(element[DATA], e); });

        };

        var container;
        Object.defineProperty(UIkit, 'container', {

            get: function() {
                return container || document.body;
            },

            set: function(element) {
                container = $(element);
            }

        });

        function update(data, e) {

            if (!data) {
                return;
            }

            for (var name in data) {
                if (data[name]._connected) {
                    data[name]._callUpdate(e);
                }
            }

        }
    }

    function hooksAPI (UIkit) {

        UIkit.prototype._callHook = function (hook) {
            var this$1 = this;


            var handlers = this.$options[hook];

            if (handlers) {
                handlers.forEach(function (handler) { return handler.call(this$1); });
            }
        };

        UIkit.prototype._callConnected = function () {

            if (this._connected) {
                return;
            }

            this._data = {};
            this._computeds = {};
            this._frames = {reads: {}, writes: {}};

            this._initProps();

            this._callHook('beforeConnect');
            this._connected = true;

            this._initEvents();
            this._initObserver();

            this._callHook('connected');
            this._callUpdate();
        };

        UIkit.prototype._callDisconnected = function () {

            if (!this._connected) {
                return;
            }

            this._callHook('beforeDisconnect');

            if (this._observer) {
                this._observer.disconnect();
                this._observer = null;
            }

            this._unbindEvents();
            this._callHook('disconnected');

            this._connected = false;

        };

        UIkit.prototype._callUpdate = function (e) {
            var this$1 = this;
            if ( e === void 0 ) e = 'update';


            var type = e.type || e;

            if (includes(['update', 'resize'], type)) {
                this._callWatches();
            }

            var updates = this.$options.update;
            var ref = this._frames;
            var reads = ref.reads;
            var writes = ref.writes;

            if (!updates) {
                return;
            }

            updates.forEach(function (ref, i) {
                var read = ref.read;
                var write = ref.write;
                var events = ref.events;


                if (type !== 'update' && !includes(events, type)) {
                    return;
                }

                if (read && !includes(fastdom.reads, reads[i])) {
                    reads[i] = fastdom.read(function () {

                        var result = this$1._connected && read.call(this$1, this$1._data, type);

                        if (result === false && write) {
                            fastdom.clear(writes[i]);
                        } else if (isPlainObject(result)) {
                            assign(this$1._data, result);
                        }
                    });
                }

                if (write && !includes(fastdom.writes, writes[i])) {
                    writes[i] = fastdom.write(function () { return this$1._connected && write.call(this$1, this$1._data, type); });
                }

            });

        };

        UIkit.prototype._callWatches = function () {
            var this$1 = this;


            var ref = this;
            var _frames = ref._frames;

            if (_frames.watch) {
                return;
            }

            var initital = !hasOwn(_frames, 'watch');

            _frames.watch = fastdom.read(function () {

                if (!this$1._connected) {
                    return;
                }

                var ref = this$1;
                var computed = ref.$options.computed;
                var _computeds = ref._computeds;

                for (var key in computed) {

                    var hasPrev = hasOwn(_computeds, key);
                    var prev = _computeds[key];

                    delete _computeds[key];

                    var ref$1 = computed[key];
                    var watch = ref$1.watch;
                    var immediate = ref$1.immediate;
                    if (watch && (
                        initital && immediate
                        || hasPrev && !isEqual(prev, this$1[key])
                    )) {
                        watch.call(this$1, this$1[key], prev);
                    }

                }

                _frames.watch = null;

            });

        };

    }

    function stateAPI (UIkit) {

        var uid = 0;

        UIkit.prototype._init = function (options) {

            options = options || {};
            options.data = normalizeData(options, this.constructor.options);

            this.$options = mergeOptions(this.constructor.options, options, this);
            this.$el = null;
            this.$props = {};

            this._uid = uid++;
            this._initData();
            this._initMethods();
            this._initComputeds();
            this._callHook('created');

            if (options.el) {
                this.$mount(options.el);
            }
        };

        UIkit.prototype._initData = function () {

            var ref = this.$options;
            var data = ref.data; if ( data === void 0 ) data = {};

            for (var key in data) {
                this.$props[key] = this[key] = data[key];
            }
        };

        UIkit.prototype._initMethods = function () {

            var ref = this.$options;
            var methods = ref.methods;

            if (methods) {
                for (var key in methods) {
                    this[key] = methods[key].bind(this);
                }
            }
        };

        UIkit.prototype._initComputeds = function () {

            var ref = this.$options;
            var computed = ref.computed;

            this._computeds = {};

            if (computed) {
                for (var key in computed) {
                    registerComputed(this, key, computed[key]);
                }
            }
        };

        UIkit.prototype._initProps = function (props) {

            var key;

            props = props || getProps(this.$options, this.$name);

            for (key in props) {
                if (!isUndefined(props[key])) {
                    this.$props[key] = props[key];
                }
            }

            var exclude = [this.$options.computed, this.$options.methods];
            for (key in this.$props) {
                if (key in props && notIn(exclude, key)) {
                    this[key] = this.$props[key];
                }
            }
        };

        UIkit.prototype._initEvents = function () {
            var this$1 = this;


            this._events = [];

            var ref = this.$options;
            var events = ref.events;

            if (events) {

                events.forEach(function (event) {

                    if (!hasOwn(event, 'handler')) {
                        for (var key in event) {
                            registerEvent(this$1, event[key], key);
                        }
                    } else {
                        registerEvent(this$1, event);
                    }

                });
            }
        };

        UIkit.prototype._unbindEvents = function () {
            this._events.forEach(function (unbind) { return unbind(); });
            delete this._events;
        };

        UIkit.prototype._initObserver = function () {
            var this$1 = this;


            var ref = this.$options;
            var attrs = ref.attrs;
            var props = ref.props;
            var el = ref.el;
            if (this._observer || !props || attrs === false) {
                return;
            }

            attrs = isArray(attrs) ? attrs : Object.keys(props);

            this._observer = new MutationObserver(function () {

                var data = getProps(this$1.$options, this$1.$name);
                if (attrs.some(function (key) { return !isUndefined(data[key]) && data[key] !== this$1.$props[key]; })) {
                    this$1.$reset();
                }

            });

            var filter = attrs.map(function (key) { return hyphenate(key); }).concat(this.$name);

            this._observer.observe(el, {
                attributes: true,
                attributeFilter: filter.concat(filter.map(function (key) { return ("data-" + key); }))
            });
        };

        function getProps(opts, name) {

            var data$1 = {};
            var args = opts.args; if ( args === void 0 ) args = [];
            var props = opts.props; if ( props === void 0 ) props = {};
            var el = opts.el;

            if (!props) {
                return data$1;
            }

            for (var key in props) {
                var prop = hyphenate(key);
                var value = data(el, prop);

                if (!isUndefined(value)) {

                    value = props[key] === Boolean && value === ''
                        ? true
                        : coerce(props[key], value);

                    if (prop === 'target' && (!value || startsWith(value, '_'))) {
                        continue;
                    }

                    data$1[key] = value;
                }
            }

            var options = parseOptions(data(el, name), args);

            for (var key$1 in options) {
                var prop$1 = camelize(key$1);
                if (props[prop$1] !== undefined) {
                    data$1[prop$1] = coerce(props[prop$1], options[key$1]);
                }
            }

            return data$1;
        }

        function registerComputed(component, key, cb) {
            Object.defineProperty(component, key, {

                enumerable: true,

                get: function() {

                    var _computeds = component._computeds;
                    var $props = component.$props;
                    var $el = component.$el;

                    if (!hasOwn(_computeds, key)) {
                        _computeds[key] = (cb.get || cb).call(component, $props, $el);
                    }

                    return _computeds[key];
                },

                set: function(value) {

                    var _computeds = component._computeds;

                    _computeds[key] = cb.set ? cb.set.call(component, value) : value;

                    if (isUndefined(_computeds[key])) {
                        delete _computeds[key];
                    }
                }

            });
        }

        function registerEvent(component, event, key) {

            if (!isPlainObject(event)) {
                event = ({name: key, handler: event});
            }

            var name = event.name;
            var el = event.el;
            var handler = event.handler;
            var capture = event.capture;
            var passive = event.passive;
            var delegate = event.delegate;
            var filter = event.filter;
            var self = event.self;
            el = isFunction(el)
                ? el.call(component)
                : el || component.$el;

            if (isArray(el)) {
                el.forEach(function (el) { return registerEvent(component, assign({}, event, {el: el}), key); });
                return;
            }

            if (!el || filter && !filter.call(component)) {
                return;
            }

            component._events.push(
                on(
                    el,
                    name,
                    !delegate
                        ? null
                        : isString(delegate)
                            ? delegate
                            : delegate.call(component),
                    isString(handler) ? component[handler] : handler.bind(component),
                    {passive: passive, capture: capture, self: self}
                )
            );

        }

        function notIn(options, key) {
            return options.every(function (arr) { return !arr || !hasOwn(arr, key); });
        }

        function coerce(type, value) {

            if (type === Boolean) {
                return toBoolean(value);
            } else if (type === Number) {
                return toNumber(value);
            } else if (type === 'list') {
                return toList(value);
            }

            return type ? type(value) : value;
        }

        function normalizeData(ref, ref$1) {
            var data = ref.data;
            var el = ref.el;
            var args = ref$1.args;
            var props = ref$1.props; if ( props === void 0 ) props = {};

            data = isArray(data)
                ? !isEmpty(args)
                    ? data.slice(0, args.length).reduce(function (data, value, index) {
                        if (isPlainObject(value)) {
                            assign(data, value);
                        } else {
                            data[args[index]] = value;
                        }
                        return data;
                    }, {})
                    : undefined
                : data;

            if (data) {
                for (var key in data) {
                    if (isUndefined(data[key])) {
                        delete data[key];
                    } else {
                        data[key] = props[key] ? coerce(props[key], data[key]) : data[key];
                    }
                }
            }

            return data;
        }
    }

    function instanceAPI (UIkit) {

        var DATA = UIkit.data;

        UIkit.prototype.$create = function (component, element, data) {
            return UIkit[component](element, data);
        };

        UIkit.prototype.$mount = function (el) {

            var ref = this.$options;
            var name = ref.name;

            if (!el[DATA]) {
                el[DATA] = {};
            }

            if (el[DATA][name]) {
                return;
            }

            el[DATA][name] = this;

            this.$el = this.$options.el = this.$options.el || el;

            if (within(el, document)) {
                this._callConnected();
            }
        };

        UIkit.prototype.$reset = function () {
            this._callDisconnected();
            this._callConnected();
        };

        UIkit.prototype.$destroy = function (removeEl) {
            if ( removeEl === void 0 ) removeEl = false;


            var ref = this.$options;
            var el = ref.el;
            var name = ref.name;

            if (el) {
                this._callDisconnected();
            }

            this._callHook('destroy');

            if (!el || !el[DATA]) {
                return;
            }

            delete el[DATA][name];

            if (!isEmpty(el[DATA])) {
                delete el[DATA];
            }

            if (removeEl) {
                remove(this.$el);
            }
        };

        UIkit.prototype.$emit = function (e) {
            this._callUpdate(e);
        };

        UIkit.prototype.$update = function (element, e) {
            if ( element === void 0 ) element = this.$el;

            UIkit.update(element, e);
        };

        UIkit.prototype.$getComponent = UIkit.getComponent;

        var names = {};
        Object.defineProperties(UIkit.prototype, {

            $container: Object.getOwnPropertyDescriptor(UIkit, 'container'),

            $name: {

                get: function() {
                    var ref = this.$options;
                    var name = ref.name;

                    if (!names[name]) {
                        names[name] = UIkit.prefix + hyphenate(name);
                    }

                    return names[name];
                }

            }

        });

    }

    function componentAPI (UIkit) {

        var DATA = UIkit.data;

        var components = {};

        UIkit.component = function (name, options) {

            var id = hyphenate(name);

            name = camelize(id);

            if (!options) {

                if (isPlainObject(components[name])) {
                    components[name] = UIkit.extend(components[name]);
                }

                return components[name];

            }

            UIkit[name] = function (element, data) {
                var i = arguments.length, argsArray = Array(i);
                while ( i-- ) argsArray[i] = arguments[i];


                var component = UIkit.component(name);

                return component.options.functional
                    ? new component({data: isPlainObject(element) ? element : [].concat( argsArray )})
                    : !element ? init(element) : $$(element).map(init)[0];

                function init(element) {

                    var instance = UIkit.getComponent(element, name);

                    if (instance) {
                        if (!data) {
                            return instance;
                        } else {
                            instance.$destroy();
                        }
                    }

                    return new component({el: element, data: data});

                }

            };

            var opt = isPlainObject(options) ? assign({}, options) : options.options;

            opt.name = name;

            if (opt.install) {
                opt.install(UIkit, opt, name);
            }

            if (UIkit._initialized && !opt.functional) {
                fastdom.read(function () { return UIkit[name](("[uk-" + id + "],[data-uk-" + id + "]")); });
            }

            return components[name] = isPlainObject(options) ? opt : options;
        };

        UIkit.getComponents = function (element) { return element && element[DATA] || {}; };
        UIkit.getComponent = function (element, name) { return UIkit.getComponents(element)[name]; };

        UIkit.connect = function (node) {

            if (node[DATA]) {
                for (var name in node[DATA]) {
                    node[DATA][name]._callConnected();
                }
            }

            for (var i = 0; i < node.attributes.length; i++) {

                var name$1 = getComponentName(node.attributes[i].name);

                if (name$1 && name$1 in components) {
                    UIkit[name$1](node);
                }

            }

        };

        UIkit.disconnect = function (node) {
            for (var name in node[DATA]) {
                node[DATA][name]._callDisconnected();
            }
        };

    }

    function getComponentName(attribute) {
        return startsWith(attribute, 'uk-') || startsWith(attribute, 'data-uk-')
            ? camelize(attribute.replace('data-uk-', '').replace('uk-', ''))
            : false;
    }

    var UIkit = function (options) {
        this._init(options);
    };

    UIkit.util = util;
    UIkit.data = '__uikit__';
    UIkit.prefix = 'uk-';
    UIkit.options = {};
    UIkit.version = '3.4.0';

    globalAPI(UIkit);
    hooksAPI(UIkit);
    stateAPI(UIkit);
    componentAPI(UIkit);
    instanceAPI(UIkit);

    function Core (UIkit) {

        ready(function () {

            UIkit.update();
            on(window, 'load resize', function () { return UIkit.update(null, 'resize'); });
            on(document, 'loadedmetadata load', function (ref) {
                var target = ref.target;

                return UIkit.update(target, 'resize');
            }, true);

            // throttle `scroll` event (Safari triggers multiple `scroll` events per frame)
            var pending;
            on(window, 'scroll', function (e) {

                if (pending) {
                    return;
                }
                pending = true;
                fastdom.write(function () { return pending = false; });

                UIkit.update(null, e.type);

            }, {passive: true, capture: true});

            var started = 0;
            on(document, 'animationstart', function (ref) {
                var target = ref.target;

                if ((css(target, 'animationName') || '').match(/^uk-.*(left|right)/)) {

                    started++;
                    css(document.body, 'overflowX', 'hidden');
                    setTimeout(function () {
                        if (!--started) {
                            css(document.body, 'overflowX', '');
                        }
                    }, toMs(css(target, 'animationDuration')) + 100);
                }
            }, true);

            var off;
            on(document, pointerDown, function (e) {

                off && off();

                if (!isTouch(e)) {
                    return;
                }

                // Handle Swipe Gesture
                var pos = getEventPos(e);
                var target = 'tagName' in e.target ? e.target : e.target.parentNode;
                off = once(document, (pointerUp + " " + pointerCancel), function (e) {

                    var ref = getEventPos(e);
                    var x = ref.x;
                    var y = ref.y;

                    // swipe
                    if (target && x && Math.abs(pos.x - x) > 100 || y && Math.abs(pos.y - y) > 100) {

                        setTimeout(function () {
                            trigger(target, 'swipe');
                            trigger(target, ("swipe" + (swipeDirection(pos.x, pos.y, x, y))));
                        });

                    }

                });

            }, {passive: true});

        });

    }

    function swipeDirection(x1, y1, x2, y2) {
        return Math.abs(x1 - x2) >= Math.abs(y1 - y2)
            ? x1 - x2 > 0
                ? 'Left'
                : 'Right'
            : y1 - y2 > 0
                ? 'Up'
                : 'Down';
    }

    function boot (UIkit) {

        var connect = UIkit.connect;
        var disconnect = UIkit.disconnect;

        if (!('MutationObserver' in window)) {
            return;
        }

        fastdom.read(init);

        function init() {

            if (document.body) {
                apply(document.body, connect);
            }

            (new MutationObserver(function (mutations) {
                var updates = [];
                mutations.forEach(function (mutation) { return applyMutation(mutation, updates); });
                updates.forEach(function (el) { return UIkit.update(el); });
            })).observe(document, {
                childList: true,
                subtree: true,
                characterData: true,
                attributes: true
            });

            UIkit._initialized = true;
        }

        function applyMutation(mutation, updates) {

            var target = mutation.target;
            var type = mutation.type;

            var update = type !== 'attributes'
                ? applyChildList(mutation)
                : applyAttribute(mutation);

            if (update && !updates.some(function (element) { return element.contains(target); })) {
                updates.push(target.contains ? target : target.parentNode); // IE 11 text node does not implement contains
            }

        }

        function applyAttribute(ref) {
            var target = ref.target;
            var attributeName = ref.attributeName;


            if (attributeName === 'href') {
                return true;
            }

            var name = getComponentName(attributeName);

            if (!name || !(name in UIkit)) {
                return;
            }

            if (hasAttr(target, attributeName)) {
                UIkit[name](target);
                return true;
            }

            var component = UIkit.getComponent(target, name);

            if (component) {
                component.$destroy();
                return true;
            }

        }

        function applyChildList(ref) {
            var addedNodes = ref.addedNodes;
            var removedNodes = ref.removedNodes;


            for (var i = 0; i < addedNodes.length; i++) {
                apply(addedNodes[i], connect);
            }

            for (var i$1 = 0; i$1 < removedNodes.length; i$1++) {
                apply(removedNodes[i$1], disconnect);
            }

            return true;
        }

    }

    var Class = {

        connected: function() {
            !hasClass(this.$el, this.$name) && addClass(this.$el, this.$name);
        }

    };

    var Togglable = {

        props: {
            cls: Boolean,
            animation: 'list',
            duration: Number,
            origin: String,
            transition: String,
            queued: Boolean
        },

        data: {
            cls: false,
            animation: [false],
            duration: 200,
            origin: false,
            transition: 'linear',
            queued: false,

            initProps: {
                overflow: '',
                height: '',
                paddingTop: '',
                paddingBottom: '',
                marginTop: '',
                marginBottom: ''
            },

            hideProps: {
                overflow: 'hidden',
                height: 0,
                paddingTop: 0,
                paddingBottom: 0,
                marginTop: 0,
                marginBottom: 0
            }

        },

        computed: {

            hasAnimation: function(ref) {
                var animation = ref.animation;

                return !!animation[0];
            },

            hasTransition: function(ref) {
                var animation = ref.animation;

                return this.hasAnimation && animation[0] === true;
            }

        },

        methods: {

            toggleElement: function(targets, show, animate) {
                var this$1 = this;

                return new Promise(function (resolve) {

                    targets = toNodes(targets);

                    var all = function (targets) { return Promise.all(targets.map(function (el) { return this$1._toggleElement(el, show, animate); })); };

                    var p;

                    if (!this$1.queued || !isUndefined(show) || !this$1.hasAnimation || targets.length < 2) {

                        p = all(targets);

                    } else {

                        var toggled = targets.filter(function (el) { return this$1.isToggled(el); });
                        var untoggled = targets.filter(function (el) { return !includes(toggled, el); });
                        var body = document.body;
                        var scroll = body.scrollTop;
                        var el = toggled[0];
                        var inProgress = Animation.inProgress(el) && hasClass(el, 'uk-animation-leave')
                                || Transition.inProgress(el) && el.style.height === '0px';

                        p = all(toggled);

                        if (!inProgress) {
                            p = p.then(function () {
                                var p = all(untoggled);
                                body.scrollTop = scroll;
                                return p;
                            });
                        }

                    }

                    p.then(resolve, noop);

                });
            },

            isToggled: function(el) {
                var nodes = toNodes(el || this.$el);
                return this.cls
                    ? hasClass(nodes, this.cls.split(' ')[0])
                    : !hasAttr(nodes, 'hidden');
            },

            updateAria: function(el) {
                if (this.cls === false) {
                    attr(el, 'aria-hidden', !this.isToggled(el));
                }
            },

            _toggleElement: function(el, show, animate) {
                var this$1 = this;


                show = isBoolean(show)
                    ? show
                    : Animation.inProgress(el)
                        ? hasClass(el, 'uk-animation-leave')
                        : Transition.inProgress(el)
                            ? el.style.height === '0px'
                            : !this.isToggled(el);

                if (!trigger(el, ("before" + (show ? 'show' : 'hide')), [this])) {
                    return Promise.reject();
                }

                var promise = (
                    isFunction(animate)
                        ? animate
                        : animate === false || !this.hasAnimation
                            ? this._toggle
                            : this.hasTransition
                                ? toggleHeight(this)
                                : toggleAnimation(this)
                )(el, show);

                trigger(el, show ? 'show' : 'hide', [this]);

                var final = function () {
                    trigger(el, show ? 'shown' : 'hidden', [this$1]);
                    this$1.$update(el);
                };

                return promise ? promise.then(final) : Promise.resolve(final());
            },

            _toggle: function(el, toggled) {

                if (!el) {
                    return;
                }

                toggled = Boolean(toggled);

                var changed;
                if (this.cls) {
                    changed = includes(this.cls, ' ') || toggled !== hasClass(el, this.cls);
                    changed && toggleClass(el, this.cls, includes(this.cls, ' ') ? undefined : toggled);
                } else {
                    changed = toggled === hasAttr(el, 'hidden');
                    changed && attr(el, 'hidden', !toggled ? '' : null);
                }

                $$('[autofocus]', el).some(function (el) { return isVisible(el) ? el.focus() || true : el.blur(); });

                this.updateAria(el);

                if (changed) {
                    trigger(el, 'toggled', [this]);
                    this.$update(el);
                }
            }

        }

    };

    function toggleHeight(ref) {
        var isToggled = ref.isToggled;
        var duration = ref.duration;
        var initProps = ref.initProps;
        var hideProps = ref.hideProps;
        var transition = ref.transition;
        var _toggle = ref._toggle;

        return function (el, show) {

            var inProgress = Transition.inProgress(el);
            var inner = el.hasChildNodes ? toFloat(css(el.firstElementChild, 'marginTop')) + toFloat(css(el.lastElementChild, 'marginBottom')) : 0;
            var currentHeight = isVisible(el) ? height(el) + (inProgress ? 0 : inner) : 0;

            Transition.cancel(el);

            if (!isToggled(el)) {
                _toggle(el, true);
            }

            height(el, '');

            // Update child components first
            fastdom.flush();

            var endHeight = height(el) + (inProgress ? 0 : inner);
            height(el, currentHeight);

            return (show
                    ? Transition.start(el, assign({}, initProps, {overflow: 'hidden', height: endHeight}), Math.round(duration * (1 - currentHeight / endHeight)), transition)
                    : Transition.start(el, hideProps, Math.round(duration * (currentHeight / endHeight)), transition).then(function () { return _toggle(el, false); })
            ).then(function () { return css(el, initProps); });

        };
    }

    function toggleAnimation(cmp) {
        return function (el, show) {

            Animation.cancel(el);

            var animation = cmp.animation;
            var duration = cmp.duration;
            var _toggle = cmp._toggle;

            if (show) {
                _toggle(el, true);
                return Animation.in(el, animation[0], duration, cmp.origin);
            }

            return Animation.out(el, animation[1] || animation[0], duration, cmp.origin).then(function () { return _toggle(el, false); });
        };
    }

    var Accordion = {

        mixins: [Class, Togglable],

        props: {
            targets: String,
            active: null,
            collapsible: Boolean,
            multiple: Boolean,
            toggle: String,
            content: String,
            transition: String,
            offset: Number
        },

        data: {
            targets: '> *',
            active: false,
            animation: [true],
            collapsible: true,
            multiple: false,
            clsOpen: 'uk-open',
            toggle: '> .uk-accordion-title',
            content: '> .uk-accordion-content',
            transition: 'ease',
            offset: 0
        },

        computed: {

            items: {

                get: function(ref, $el) {
                    var targets = ref.targets;

                    return $$(targets, $el);
                },

                watch: function(items, prev) {
                    var this$1 = this;


                    items.forEach(function (el) { return hide($(this$1.content, el), !hasClass(el, this$1.clsOpen)); });

                    if (prev || hasClass(items, this.clsOpen)) {
                        return;
                    }

                    var active = this.active !== false && items[Number(this.active)]
                        || !this.collapsible && items[0];

                    if (active) {
                        this.toggle(active, false);
                    }

                },

                immediate: true

            }

        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return ((this.targets) + " " + (this.$props.toggle));
                },

                handler: function(e) {
                    e.preventDefault();
                    this.toggle(index($$(((this.targets) + " " + (this.$props.toggle)), this.$el), e.current));
                }

            }

        ],

        methods: {

            toggle: function(item, animate) {
                var this$1 = this;


                var items = [this.items[getIndex(item, this.items)]];
                var activeItems = filter(this.items, ("." + (this.clsOpen)));

                if (!this.multiple && !includes(activeItems, items[0])) {
                    items = items.concat(activeItems);
                }

                if (!this.collapsible && !filter(items, (":not(." + (this.clsOpen) + ")")).length) {
                    return;
                }

                items.forEach(function (el) { return this$1.toggleElement(el, !hasClass(el, this$1.clsOpen), function (el, show) {

                    toggleClass(el, this$1.clsOpen, show);

                    var content = $(("" + (el._wrapper ? '> * ' : '') + (this$1.content)), el);

                    if (animate === false || !this$1.hasTransition) {
                        hide(content, !show);
                        return;
                    }

                    if (!el._wrapper) {
                        el._wrapper = wrapAll(content, ("<div" + (show ? ' hidden' : '') + ">"));
                    }

                    hide(content, false);
                    return toggleHeight(this$1)(el._wrapper, show).then(function () {
                        hide(content, !show);
                        delete el._wrapper;
                        unwrap(content);

                        if (show) {
                            var toggle = $(this$1.$props.toggle, el);
                            if (!isInView(toggle)) {
                                scrollIntoView(toggle, {offset: this$1.offset});
                            }
                        }
                    });
                }); });
            }

        }

    };

    function hide(el, hide) {
        attr(el, 'hidden', hide ? '' : null);
    }

    var alert = {

        mixins: [Class, Togglable],

        args: 'animation',

        props: {
            close: String
        },

        data: {
            animation: [true],
            selClose: '.uk-alert-close',
            duration: 150,
            hideProps: assign({opacity: 0}, Togglable.data.hideProps)
        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return this.selClose;
                },

                handler: function(e) {
                    e.preventDefault();
                    this.close();
                }

            }

        ],

        methods: {

            close: function() {
                var this$1 = this;

                this.toggleElement(this.$el).then(function () { return this$1.$destroy(true); });
            }

        }

    };

    var Video = {

        args: 'autoplay',

        props: {
            automute: Boolean,
            autoplay: Boolean
        },

        data: {
            automute: false,
            autoplay: true
        },

        computed: {

            inView: function(ref) {
                var autoplay = ref.autoplay;

                return autoplay === 'inview';
            }

        },

        connected: function() {

            if (this.inView && !hasAttr(this.$el, 'preload')) {
                this.$el.preload = 'none';
            }

            this.player = new Player(this.$el);

            if (this.automute) {
                this.player.mute();
            }

        },

        update: {

            read: function() {

                return !this.player
                    ? false
                    : {
                        visible: isVisible(this.$el) && css(this.$el, 'visibility') !== 'hidden',
                        inView: this.inView && isInView(this.$el)
                    };
            },

            write: function(ref) {
                var visible = ref.visible;
                var inView = ref.inView;


                if (!visible || this.inView && !inView) {
                    this.player.pause();
                } else if (this.autoplay === true || this.inView && inView) {
                    this.player.play();
                }

            },

            events: ['resize', 'scroll']

        }

    };

    var cover = {

        mixins: [Class, Video],

        props: {
            width: Number,
            height: Number
        },

        data: {
            automute: true
        },

        update: {

            read: function() {

                var el = this.$el;
                var ref = getPositionedParent(el) || el.parentNode;
                var height = ref.offsetHeight;
                var width = ref.offsetWidth;
                var dim = Dimensions.cover(
                    {
                        width: this.width || el.naturalWidth || el.videoWidth || el.clientWidth,
                        height: this.height || el.naturalHeight || el.videoHeight || el.clientHeight
                    },
                    {
                        width: width + (width % 2 ? 1 : 0),
                        height: height + (height % 2 ? 1 : 0)
                    }
                );

                if (!dim.width || !dim.height) {
                    return false;
                }

                return dim;
            },

            write: function(ref) {
                var height = ref.height;
                var width = ref.width;

                css(this.$el, {height: height, width: width});
            },

            events: ['resize']

        }

    };

    function getPositionedParent(el) {
        while ((el = parent(el))) {
            if (css(el, 'position') !== 'static') {
                return el;
            }
        }
    }

    var Position = {

        props: {
            pos: String,
            offset: null,
            flip: Boolean,
            clsPos: String
        },

        data: {
            pos: ("bottom-" + (!isRtl ? 'left' : 'right')),
            flip: true,
            offset: false,
            clsPos: ''
        },

        computed: {

            pos: function(ref) {
                var pos = ref.pos;

                return (pos + (!includes(pos, '-') ? '-center' : '')).split('-');
            },

            dir: function() {
                return this.pos[0];
            },

            align: function() {
                return this.pos[1];
            }

        },

        methods: {

            positionAt: function(element, target, boundary) {

                removeClasses(element, ((this.clsPos) + "-(top|bottom|left|right)(-[a-z]+)?"));
                css(element, {top: '', left: ''});

                var node;
                var ref = this;
                var offset$1 = ref.offset;
                var axis = this.getAxis();

                if (!isNumeric(offset$1)) {
                    node = $(offset$1);
                    offset$1 = node
                        ? offset(node)[axis === 'x' ? 'left' : 'top'] - offset(target)[axis === 'x' ? 'right' : 'bottom']
                        : 0;
                }

                var ref$1 = positionAt(
                    element,
                    target,
                    axis === 'x' ? ((flipPosition(this.dir)) + " " + (this.align)) : ((this.align) + " " + (flipPosition(this.dir))),
                    axis === 'x' ? ((this.dir) + " " + (this.align)) : ((this.align) + " " + (this.dir)),
                    axis === 'x' ? ("" + (this.dir === 'left' ? -offset$1 : offset$1)) : (" " + (this.dir === 'top' ? -offset$1 : offset$1)),
                    null,
                    this.flip,
                    boundary
                ).target;
                var x = ref$1.x;
                var y = ref$1.y;

                this.dir = axis === 'x' ? x : y;
                this.align = axis === 'x' ? y : x;

                toggleClass(element, ((this.clsPos) + "-" + (this.dir) + "-" + (this.align)), this.offset === false);

            },

            getAxis: function() {
                return this.dir === 'top' || this.dir === 'bottom' ? 'y' : 'x';
            }

        }

    };

    var active;

    var drop = {

        mixins: [Position, Togglable],

        args: 'pos',

        props: {
            mode: 'list',
            toggle: Boolean,
            boundary: Boolean,
            boundaryAlign: Boolean,
            delayShow: Number,
            delayHide: Number,
            clsDrop: String
        },

        data: {
            mode: ['click', 'hover'],
            toggle: '- *',
            boundary: window,
            boundaryAlign: false,
            delayShow: 0,
            delayHide: 800,
            clsDrop: false,
            animation: ['uk-animation-fade'],
            cls: 'uk-open'
        },

        computed: {

            boundary: function(ref, $el) {
                var boundary = ref.boundary;

                return query(boundary, $el);
            },

            clsDrop: function(ref) {
                var clsDrop = ref.clsDrop;

                return clsDrop || ("uk-" + (this.$options.name));
            },

            clsPos: function() {
                return this.clsDrop;
            }

        },

        created: function() {
            this.tracker = new MouseTracker();
        },

        connected: function() {

            addClass(this.$el, this.clsDrop);

            var ref = this.$props;
            var toggle = ref.toggle;
            this.toggle = toggle && this.$create('toggle', query(toggle, this.$el), {
                target: this.$el,
                mode: this.mode
            });

            !this.toggle && trigger(this.$el, 'updatearia');

        },

        disconnected: function() {
            if (this.isActive()) {
                active = null;
            }
        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return ("." + (this.clsDrop) + "-close");
                },

                handler: function(e) {
                    e.preventDefault();
                    this.hide(false);
                }

            },

            {

                name: 'click',

                delegate: function() {
                    return 'a[href^="#"]';
                },

                handler: function(ref) {
                    var defaultPrevented = ref.defaultPrevented;
                    var hash = ref.current.hash;

                    if (!defaultPrevented && hash && !within(hash, this.$el)) {
                        this.hide(false);
                    }
                }

            },

            {

                name: 'beforescroll',

                handler: function() {
                    this.hide(false);
                }

            },

            {

                name: 'toggle',

                self: true,

                handler: function(e, toggle) {

                    e.preventDefault();

                    if (this.isToggled()) {
                        this.hide(false);
                    } else {
                        this.show(toggle, false);
                    }
                }

            },

            {

                name: 'toggleshow',

                self: true,

                handler: function(e, toggle) {
                    e.preventDefault();
                    this.show(toggle);
                }

            },

            {

                name: 'togglehide',

                self: true,

                handler: function(e) {
                    e.preventDefault();
                    this.hide();
                }

            },

            {

                name: pointerEnter,

                filter: function() {
                    return includes(this.mode, 'hover');
                },

                handler: function(e) {
                    if (!isTouch(e)) {
                        this.clearTimers();
                    }
                }

            },

            {

                name: pointerLeave,

                filter: function() {
                    return includes(this.mode, 'hover');
                },

                handler: function(e) {
                    if (!isTouch(e)) {
                        this.hide();
                    }
                }

            },

            {

                name: 'toggled',

                self: true,

                handler: function() {

                    if (!this.isToggled()) {
                        return;
                    }

                    this.clearTimers();
                    Animation.cancel(this.$el);
                    this.position();
                }

            },

            {

                name: 'show',

                self: true,

                handler: function() {
                    var this$1 = this;


                    active = this;

                    this.tracker.init();
                    trigger(this.$el, 'updatearia');

                    once(this.$el, 'hide', on(document, pointerDown, function (ref) {
                            var target = ref.target;

                            return !within(target, this$1.$el) && once(document, (pointerUp + " " + pointerCancel + " scroll"), function (ref) {
                            var defaultPrevented = ref.defaultPrevented;
                            var type = ref.type;
                            var newTarget = ref.target;

                            if (!defaultPrevented && type === pointerUp && target === newTarget && !(this$1.toggle && within(target, this$1.toggle.$el))) {
                                this$1.hide(false);
                            }
                        }, true);
                    }
                    ), {self: true});

                }

            },

            {

                name: 'beforehide',

                self: true,

                handler: function() {
                    this.clearTimers();
                }

            },

            {

                name: 'hide',

                handler: function(ref) {
                    var target = ref.target;


                    if (this.$el !== target) {
                        active = active === null && within(target, this.$el) && this.isToggled() ? this : active;
                        return;
                    }

                    active = this.isActive() ? null : active;
                    trigger(this.$el, 'updatearia');
                    this.tracker.cancel();
                }

            },

            {

                name: 'updatearia',

                self: true,

                handler: function(e, toggle) {

                    e.preventDefault();

                    this.updateAria(this.$el);

                    if (toggle || this.toggle) {
                        attr((toggle || this.toggle).$el, 'aria-expanded', this.isToggled());
                        toggleClass(this.toggle.$el, this.cls, this.isToggled());
                    }
                }
            }

        ],

        update: {

            write: function() {

                if (this.isToggled() && !Animation.inProgress(this.$el)) {
                    this.position();
                }

            },

            events: ['resize']

        },

        methods: {

            show: function(toggle, delay) {
                var this$1 = this;
                if ( toggle === void 0 ) toggle = this.toggle;
                if ( delay === void 0 ) delay = true;


                if (this.isToggled() && toggle && this.toggle && toggle.$el !== this.toggle.$el) {
                    this.hide(false);
                }

                this.toggle = toggle;

                this.clearTimers();

                if (this.isActive()) {
                    return;
                }

                if (active) {

                    if (delay && active.isDelaying) {
                        this.showTimer = setTimeout(this.show, 10);
                        return;
                    }

                    while (active && !within(this.$el, active.$el)) {
                        active.hide(false);
                    }
                }

                this.showTimer = setTimeout(function () { return !this$1.isToggled() && this$1.toggleElement(this$1.$el, true); }, delay && this.delayShow || 0);

            },

            hide: function(delay) {
                var this$1 = this;
                if ( delay === void 0 ) delay = true;


                var hide = function () { return this$1.toggleElement(this$1.$el, false, false); };

                this.clearTimers();

                this.isDelaying = getPositionedElements(this.$el).some(function (el) { return this$1.tracker.movesTo(el); });

                if (delay && this.isDelaying) {
                    this.hideTimer = setTimeout(this.hide, 50);
                } else if (delay && this.delayHide) {
                    this.hideTimer = setTimeout(hide, this.delayHide);
                } else {
                    hide();
                }
            },

            clearTimers: function() {
                clearTimeout(this.showTimer);
                clearTimeout(this.hideTimer);
                this.showTimer = null;
                this.hideTimer = null;
                this.isDelaying = false;
            },

            isActive: function() {
                return active === this;
            },

            position: function() {

                removeClasses(this.$el, ((this.clsDrop) + "-(stack|boundary)"));
                toggleClass(this.$el, ((this.clsDrop) + "-boundary"), this.boundaryAlign);

                var boundary = offset(this.boundary);
                var alignTo = this.boundaryAlign ? boundary : offset(this.toggle.$el);

                if (this.align === 'justify') {
                    var prop = this.getAxis() === 'y' ? 'width' : 'height';
                    css(this.$el, prop, alignTo[prop]);
                } else if (this.$el.offsetWidth > Math.max(boundary.right - alignTo.left, alignTo.right - boundary.left)) {
                    addClass(this.$el, ((this.clsDrop) + "-stack"));
                }

                this.positionAt(this.$el, this.boundaryAlign ? this.boundary : this.toggle.$el, this.boundary);

            }

        }

    };

    function getPositionedElements(el) {
        var result = [];
        apply(el, function (el) { return css(el, 'position') !== 'static' && result.push(el); });
        return result;
    }

    var formCustom = {

        mixins: [Class],

        args: 'target',

        props: {
            target: Boolean
        },

        data: {
            target: false
        },

        computed: {

            input: function(_, $el) {
                return $(selInput, $el);
            },

            state: function() {
                return this.input.nextElementSibling;
            },

            target: function(ref, $el) {
                var target = ref.target;

                return target && (target === true
                    && this.input.parentNode === $el
                    && this.input.nextElementSibling
                    || query(target, $el));
            }

        },

        update: function() {

            var ref = this;
            var target = ref.target;
            var input = ref.input;

            if (!target) {
                return;
            }

            var option;
            var prop = isInput(target) ? 'value' : 'textContent';
            var prev = target[prop];
            var value = input.files && input.files[0]
                ? input.files[0].name
                : matches(input, 'select') && (option = $$('option', input).filter(function (el) { return el.selected; })[0]) // eslint-disable-line prefer-destructuring
                    ? option.textContent
                    : input.value;

            if (prev !== value) {
                target[prop] = value;
            }

        },

        events: [

            {
                name: 'change',

                handler: function() {
                    this.$update();
                }
            },

            {
                name: 'reset',

                el: function() {
                    return closest(this.$el, 'form');
                },

                handler: function() {
                    this.$update();
                }
            }

        ]

    };

    // Deprecated
    var gif = {

        update: {

            read: function(data) {

                var inview = isInView(this.$el);

                if (!inview || data.isInView === inview) {
                    return false;
                }

                data.isInView = inview;
            },

            write: function() {
                this.$el.src = this.$el.src;
            },

            events: ['scroll', 'resize']
        }

    };

    var Margin = {

        props: {
            margin: String,
            firstColumn: Boolean
        },

        data: {
            margin: 'uk-margin-small-top',
            firstColumn: 'uk-first-column'
        },

        update: {

            read: function() {
                return {rows: getRows(this.$el.children)};
            },

            write: function(ref) {
                var this$1 = this;
                var rows = ref.rows;


                rows.forEach(function (row, i) { return row.forEach(function (el, j) {
                        toggleClass(el, this$1.margin, i !== 0);
                        toggleClass(el, this$1.firstColumn, j === 0);
                    }); }
                );

            },

            events: ['resize']

        }

    };

    function getRows(items) {

        var rows = [[]];

        for (var i = 0; i < items.length; i++) {

            var el = items[i];

            if (!isVisible(el)) {
                continue;
            }

            var dim = getOffset(el);

            for (var j = rows.length - 1; j >= 0; j--) {

                var row = rows[j];

                if (!row[0]) {
                    row.push(el);
                    break;
                }

                var leftDim = (void 0);
                if (row[0].offsetParent === el.offsetParent) {
                    leftDim = getOffset(row[0]);
                } else {
                    dim = getOffset(el, true);
                    leftDim = getOffset(row[0], true);
                }

                if (dim.top >= leftDim.bottom - 1 && dim.top !== leftDim.top) {
                    rows.push([el]);
                    break;
                }

                if (dim.bottom > leftDim.top || dim.top === leftDim.top) {

                    if (dim.left < leftDim.left && !isRtl) {
                        row.unshift(el);
                        break;
                    }

                    row.push(el);
                    break;
                }

                if (j === 0) {
                    rows.unshift([el]);
                    break;
                }

            }

        }

        return rows;

    }

    function getOffset(element, offset) {
        var assign;

        if ( offset === void 0 ) offset = false;

        var offsetTop = element.offsetTop;
        var offsetLeft = element.offsetLeft;
        var offsetHeight = element.offsetHeight;

        if (offset) {
            (assign = offsetPosition(element), offsetTop = assign[0], offsetLeft = assign[1]);
        }

        return {
            top: offsetTop,
            left: offsetLeft,
            height: offsetHeight,
            bottom: offsetTop + offsetHeight
        };
    }

    var grid = {

        extends: Margin,

        mixins: [Class],

        name: 'grid',

        props: {
            masonry: Boolean,
            parallax: Number
        },

        data: {
            margin: 'uk-grid-margin',
            clsStack: 'uk-grid-stack',
            masonry: false,
            parallax: 0
        },

        computed: {

            length: function(_, $el) {
                return $el.children.length;
            },

            parallax: function(ref) {
                var parallax = ref.parallax;

                return parallax && this.length ? Math.abs(parallax) : '';
            }

        },

        connected: function() {
            this.masonry && addClass(this.$el, 'uk-flex-top uk-flex-wrap-top');
        },

        update: [

            {

                read: function(ref) {
                    var rows = ref.rows;

                    return {stacks: !rows.some(function (row) { return row.length > 1; })};
                },

                write: function(ref) {
                    var stacks = ref.stacks;

                    toggleClass(this.$el, this.clsStack, stacks);
                },

                events: ['resize']

            },

            {

                read: function(ref) {
                    var rows = ref.rows;


                    if (!this.masonry && !this.parallax) {
                        return false;
                    }

                    rows = rows.map(function (elements) { return sortBy(elements, 'offsetLeft'); });

                    if (isRtl) {
                        rows.map(function (row) { return row.reverse(); });
                    }

                    var transitionInProgress = rows.some(function (elements) { return elements.some(Transition.inProgress); });
                    var translates = false;
                    var elHeight = '';

                    if (this.masonry && this.length) {

                        var height = 0;

                        translates = rows.reduce(function (translates, row, i) {

                            translates[i] = row.map(function (_, j) { return i === 0 ? 0 : toFloat(translates[i - 1][j]) + (height - toFloat(rows[i - 1][j] && rows[i - 1][j].offsetHeight)); });
                            height = row.reduce(function (height, el) { return Math.max(height, el.offsetHeight); }, 0);

                            return translates;

                        }, []);

                        elHeight = maxColumnHeight(rows) + getMarginTop(this.$el, this.margin) * (rows.length - 1);

                    }

                    var padding = this.parallax && getPaddingBottom(this.parallax, rows, translates);

                    return {padding: padding, rows: rows, translates: translates, height: !transitionInProgress ? elHeight : false};

                },

                write: function(ref) {
                    var height = ref.height;
                    var padding = ref.padding;


                    css(this.$el, 'paddingBottom', padding);
                    height !== false && css(this.$el, 'height', height);

                },

                events: ['resize']

            },

            {

                read: function(ref) {
                    var height$1 = ref.height;

                    return {
                        scrolled: this.parallax
                            ? scrolledOver(this.$el, height$1 ? height$1 - height(this.$el) : 0) * this.parallax
                            : false
                    };
                },

                write: function(ref) {
                    var rows = ref.rows;
                    var scrolled = ref.scrolled;
                    var translates = ref.translates;


                    if (scrolled === false && !translates) {
                        return;
                    }

                    rows.forEach(function (row, i) { return row.forEach(function (el, j) { return css(el, 'transform', !scrolled && !translates ? '' : ("translateY(" + ((translates && -translates[i][j]) + (scrolled ? j % 2 ? scrolled : scrolled / 8 : 0)) + "px)")); }
                        ); }
                    );

                },

                events: ['scroll', 'resize']

            }

        ]

    };

    function getPaddingBottom(distance, rows, translates) {
        var column = 0;
        var max = 0;
        var maxScrolled = 0;
        for (var i = rows.length - 1; i >= 0; i--) {
            for (var j = column; j < rows[i].length; j++) {
                var el = rows[i][j];
                var bottom = el.offsetTop + height(el) + (translates && -translates[i][j]);
                max = Math.max(max, bottom);
                maxScrolled = Math.max(maxScrolled, bottom + (j % 2 ? distance : distance / 8));
                column++;
            }
        }
        return maxScrolled - max;
    }

    function getMarginTop(root, cls) {

        var nodes = children(root);
        var ref = nodes.filter(function (el) { return hasClass(el, cls); });
        var node = ref[0];

        return toFloat(node
            ? css(node, 'marginTop')
            : css(nodes[0], 'paddingLeft'));
    }

    function maxColumnHeight(rows) {
        return Math.max.apply(Math, rows.reduce(function (sum, row) {
            row.forEach(function (el, i) { return sum[i] = (sum[i] || 0) + el.offsetHeight; });
            return sum;
        }, []));
    }

    // IE 11 fix (min-height on a flex container won't apply to its flex items)
    var FlexBug = isIE ? {

        props: {
            selMinHeight: String
        },

        data: {
            selMinHeight: false,
            forceHeight: false
        },

        computed: {

            elements: function(ref, $el) {
                var selMinHeight = ref.selMinHeight;

                return selMinHeight ? $$(selMinHeight, $el) : [$el];
            }

        },

        update: [

            {

                read: function() {
                    css(this.elements, 'height', '');
                },

                order: -5,

                events: ['resize']

            },

            {

                write: function() {
                    var this$1 = this;

                    this.elements.forEach(function (el) {
                        var height = toFloat(css(el, 'minHeight'));
                        if (height && (this$1.forceHeight || Math.round(height + boxModelAdjust(el, 'height', 'content-box')) >= el.offsetHeight)) {
                            css(el, 'height', height);
                        }
                    });
                },

                order: 5,

                events: ['resize']

            }

        ]

    } : {};

    var heightMatch = {

        mixins: [FlexBug],

        args: 'target',

        props: {
            target: String,
            row: Boolean
        },

        data: {
            target: '> *',
            row: true,
            forceHeight: true
        },

        computed: {

            elements: function(ref, $el) {
                var target = ref.target;

                return $$(target, $el);
            }

        },

        update: {

            read: function() {
                return {
                    rows: (this.row ? getRows(this.elements) : [this.elements]).map(match)
                };
            },

            write: function(ref) {
                var rows = ref.rows;

                rows.forEach(function (ref) {
                        var heights = ref.heights;
                        var elements = ref.elements;

                        return elements.forEach(function (el, i) { return css(el, 'minHeight', heights[i]); }
                    );
                }
                );
            },

            events: ['resize']

        }

    };

    function match(elements) {
        var assign;


        if (elements.length < 2) {
            return {heights: [''], elements: elements};
        }

        var ref = getHeights(elements);
        var heights = ref.heights;
        var max = ref.max;
        var hasMinHeight = elements.some(function (el) { return el.style.minHeight; });
        var hasShrunk = elements.some(function (el, i) { return !el.style.minHeight && heights[i] < max; });

        if (hasMinHeight && hasShrunk) {
            css(elements, 'minHeight', '');
            ((assign = getHeights(elements), heights = assign.heights, max = assign.max));
        }

        heights = elements.map(function (el, i) { return heights[i] === max && toFloat(el.style.minHeight).toFixed(2) !== max.toFixed(2) ? '' : max; }
        );

        return {heights: heights, elements: elements};
    }

    function getHeights(elements) {
        var heights = elements.map(function (el) { return offset(el).height - boxModelAdjust(el, 'height', 'content-box'); });
        var max = Math.max.apply(null, heights);

        return {heights: heights, max: max};
    }

    var heightViewport = {

        mixins: [FlexBug],

        props: {
            expand: Boolean,
            offsetTop: Boolean,
            offsetBottom: Boolean,
            minHeight: Number
        },

        data: {
            expand: false,
            offsetTop: false,
            offsetBottom: false,
            minHeight: 0
        },

        update: {

            read: function(ref) {
                var prev = ref.minHeight;


                if (!isVisible(this.$el)) {
                    return false;
                }

                var minHeight = '';
                var box = boxModelAdjust(this.$el, 'height', 'content-box');

                if (this.expand) {

                    this.$el.dataset.heightExpand = '';

                    if ($('[data-height-expand]') !== this.$el) {
                        return false;
                    }

                    minHeight = height(window) - (offsetHeight(document.documentElement) - offsetHeight(this.$el)) - box || '';

                } else {

                    // on mobile devices (iOS and Android) window.innerHeight !== 100vh
                    minHeight = 'calc(100vh';

                    if (this.offsetTop) {

                        var ref$1 = offset(this.$el);
                        var top = ref$1.top;
                        minHeight += top > 0 && top < height(window) / 2 ? (" - " + top + "px") : '';

                    }

                    if (this.offsetBottom === true) {

                        minHeight += " - " + (offsetHeight(this.$el.nextElementSibling)) + "px";

                    } else if (isNumeric(this.offsetBottom)) {

                        minHeight += " - " + (this.offsetBottom) + "vh";

                    } else if (this.offsetBottom && endsWith(this.offsetBottom, 'px')) {

                        minHeight += " - " + (toFloat(this.offsetBottom)) + "px";

                    } else if (isString(this.offsetBottom)) {

                        minHeight += " - " + (offsetHeight(query(this.offsetBottom, this.$el))) + "px";

                    }

                    minHeight += (box ? (" - " + box + "px") : '') + ")";

                }

                return {minHeight: minHeight, prev: prev};
            },

            write: function(ref) {
                var minHeight = ref.minHeight;
                var prev = ref.prev;


                css(this.$el, {minHeight: minHeight});

                if (minHeight !== prev) {
                    this.$update(this.$el, 'resize');
                }

                if (this.minHeight && toFloat(css(this.$el, 'minHeight')) < this.minHeight) {
                    css(this.$el, 'minHeight', this.minHeight);
                }

            },

            events: ['resize']

        }

    };

    function offsetHeight(el) {
        return el && offset(el).height || 0;
    }

    var SVG = {

        args: 'src',

        props: {
            id: Boolean,
            icon: String,
            src: String,
            style: String,
            width: Number,
            height: Number,
            ratio: Number,
            class: String,
            strokeAnimation: Boolean,
            focusable: Boolean, // IE 11
            attributes: 'list'
        },

        data: {
            ratio: 1,
            include: ['style', 'class', 'focusable'],
            class: '',
            strokeAnimation: false
        },

        beforeConnect: function() {
            var this$1 = this;
            var assign;


            this.class += ' uk-svg';

            if (!this.icon && includes(this.src, '#')) {

                var parts = this.src.split('#');

                if (parts.length > 1) {
                    (assign = parts, this.src = assign[0], this.icon = assign[1]);
                }
            }

            this.svg = this.getSvg().then(function (el) {
                this$1.applyAttributes(el);
                return this$1.svgEl = insertSVG(el, this$1.$el);
            }, noop);

        },

        disconnected: function() {
            var this$1 = this;


            if (isVoidElement(this.$el)) {
                attr(this.$el, 'hidden', null);
            }

            if (this.svg) {
                this.svg.then(function (svg) { return (!this$1._connected || svg !== this$1.svgEl) && remove(svg); }, noop);
            }

            this.svg = this.svgEl = null;

        },

        update: {

            read: function() {
                return !!(this.strokeAnimation && this.svgEl && isVisible(this.svgEl));
            },

            write: function() {
                applyAnimation(this.svgEl);
            },

            type: ['resize']

        },

        methods: {

            getSvg: function() {
                var this$1 = this;

                return loadSVG(this.src).then(function (svg) { return parseSVG(svg, this$1.icon) || Promise.reject('SVG not found.'); }
                );
            },

            applyAttributes: function(el) {
                var this$1 = this;


                for (var prop in this.$options.props) {
                    if (this[prop] && includes(this.include, prop)) {
                        attr(el, prop, this[prop]);
                    }
                }

                for (var attribute in this.attributes) {
                    var ref = this.attributes[attribute].split(':', 2);
                    var prop$1 = ref[0];
                    var value = ref[1];
                    attr(el, prop$1, value);
                }

                if (!this.id) {
                    removeAttr(el, 'id');
                }

                var props = ['width', 'height'];
                var dimensions = [this.width, this.height];

                if (!dimensions.some(function (val) { return val; })) {
                    dimensions = props.map(function (prop) { return attr(el, prop); });
                }

                var viewBox = attr(el, 'viewBox');
                if (viewBox && !dimensions.some(function (val) { return val; })) {
                    dimensions = viewBox.split(' ').slice(2);
                }

                dimensions.forEach(function (val, i) {
                    val = (val | 0) * this$1.ratio;
                    val && attr(el, props[i], val);

                    if (val && !dimensions[i ^ 1]) {
                        removeAttr(el, props[i ^ 1]);
                    }
                });

                attr(el, 'data-svg', this.icon || this.src);

            }

        }

    };

    var svgs = {};

    function loadSVG(src) {

        if (svgs[src]) {
            return svgs[src];
        }

        return svgs[src] = new Promise(function (resolve, reject) {

            if (!src) {
                reject();
                return;
            }

            if (startsWith(src, 'data:')) {
                resolve(decodeURIComponent(src.split(',')[1]));
            } else {

                ajax(src).then(
                    function (xhr) { return resolve(xhr.response); },
                    function () { return reject('SVG not found.'); }
                );

            }

        });
    }

    function parseSVG(svg, icon) {

        if (icon && includes(svg, '<symbol')) {
            svg = parseSymbols(svg, icon) || svg;
        }

        svg = $(svg.substr(svg.indexOf('<svg')));
        return svg && svg.hasChildNodes() && svg;
    }

    var symbolRe = /<symbol([^]*?id=(['"])(.+?)\2[^]*?<\/)symbol>/g;
    var symbols = {};

    function parseSymbols(svg, icon) {

        if (!symbols[svg]) {

            symbols[svg] = {};

            symbolRe.lastIndex = 0;

            var match;
            while ((match = symbolRe.exec(svg))) {
                symbols[svg][match[3]] = "<svg xmlns=\"http://www.w3.org/2000/svg\"" + (match[1]) + "svg>";
            }

        }

        return symbols[svg][icon];
    }

    function applyAnimation(el) {

        var length = getMaxPathLength(el);

        if (length) {
            el.style.setProperty('--uk-animation-stroke', length);
        }

    }

    function getMaxPathLength(el) {
        return Math.ceil(Math.max.apply(Math, [ 0 ].concat( $$('[stroke]', el).map(function (stroke) {
            try {
                return stroke.getTotalLength();
            } catch (e) {
                return 0;
            }
        }) )));
    }

    function insertSVG(el, root) {

        if (isVoidElement(root) || root.tagName === 'CANVAS') {

            attr(root, 'hidden', true);

            var next = root.nextElementSibling;
            return equals(el, next)
                ? next
                : after(root, el);

        }

        var last = root.lastElementChild;
        return equals(el, last)
            ? last
            : append(root, el);
    }

    function equals(el, other) {
        return attr(el, 'data-svg') === attr(other, 'data-svg');
    }

    var closeIcon = "<svg width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" xmlns=\"http://www.w3.org/2000/svg\"><line fill=\"none\" stroke=\"#000\" stroke-width=\"1.1\" x1=\"1\" y1=\"1\" x2=\"13\" y2=\"13\"/><line fill=\"none\" stroke=\"#000\" stroke-width=\"1.1\" x1=\"13\" y1=\"1\" x2=\"1\" y2=\"13\"/></svg>";

    var closeLarge = "<svg width=\"20\" height=\"20\" viewBox=\"0 0 20 20\" xmlns=\"http://www.w3.org/2000/svg\"><line fill=\"none\" stroke=\"#000\" stroke-width=\"1.4\" x1=\"1\" y1=\"1\" x2=\"19\" y2=\"19\"/><line fill=\"none\" stroke=\"#000\" stroke-width=\"1.4\" x1=\"19\" y1=\"1\" x2=\"1\" y2=\"19\"/></svg>";

    var marker = "<svg width=\"20\" height=\"20\" viewBox=\"0 0 20 20\" xmlns=\"http://www.w3.org/2000/svg\"><rect x=\"9\" y=\"4\" width=\"1\" height=\"11\"/><rect x=\"4\" y=\"9\" width=\"11\" height=\"1\"/></svg>";

    var navbarToggleIcon = "<svg width=\"20\" height=\"20\" viewBox=\"0 0 20 20\" xmlns=\"http://www.w3.org/2000/svg\"><rect y=\"9\" width=\"20\" height=\"2\"/><rect y=\"3\" width=\"20\" height=\"2\"/><rect y=\"15\" width=\"20\" height=\"2\"/></svg>";

    var overlayIcon = "<svg width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" xmlns=\"http://www.w3.org/2000/svg\"><rect x=\"19\" y=\"0\" width=\"1\" height=\"40\"/><rect x=\"0\" y=\"19\" width=\"40\" height=\"1\"/></svg>";

    var paginationNext = "<svg width=\"7\" height=\"12\" viewBox=\"0 0 7 12\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"1.2\" points=\"1 1 6 6 1 11\"/></svg>";

    var paginationPrevious = "<svg width=\"7\" height=\"12\" viewBox=\"0 0 7 12\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"1.2\" points=\"6 1 1 6 6 11\"/></svg>";

    var searchIcon = "<svg width=\"20\" height=\"20\" viewBox=\"0 0 20 20\" xmlns=\"http://www.w3.org/2000/svg\"><circle fill=\"none\" stroke=\"#000\" stroke-width=\"1.1\" cx=\"9\" cy=\"9\" r=\"7\"/><path fill=\"none\" stroke=\"#000\" stroke-width=\"1.1\" d=\"M14,14 L18,18 L14,14 Z\"/></svg>";

    var searchLarge = "<svg width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" xmlns=\"http://www.w3.org/2000/svg\"><circle fill=\"none\" stroke=\"#000\" stroke-width=\"1.8\" cx=\"17.5\" cy=\"17.5\" r=\"16.5\"/><line fill=\"none\" stroke=\"#000\" stroke-width=\"1.8\" x1=\"38\" y1=\"39\" x2=\"29\" y2=\"30\"/></svg>";

    var searchNavbar = "<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" xmlns=\"http://www.w3.org/2000/svg\"><circle fill=\"none\" stroke=\"#000\" stroke-width=\"1.1\" cx=\"10.5\" cy=\"10.5\" r=\"9.5\"/><line fill=\"none\" stroke=\"#000\" stroke-width=\"1.1\" x1=\"23\" y1=\"23\" x2=\"17\" y2=\"17\"/></svg>";

    var slidenavNext = "<svg width=\"14px\" height=\"24px\" viewBox=\"0 0 14 24\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"1.4\" points=\"1.225,23 12.775,12 1.225,1 \"/></svg>";

    var slidenavNextLarge = "<svg width=\"25px\" height=\"40px\" viewBox=\"0 0 25 40\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"2\" points=\"4.002,38.547 22.527,20.024 4,1.5 \"/></svg>";

    var slidenavPrevious = "<svg width=\"14px\" height=\"24px\" viewBox=\"0 0 14 24\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"1.4\" points=\"12.775,1 1.225,12 12.775,23 \"/></svg>";

    var slidenavPreviousLarge = "<svg width=\"25px\" height=\"40px\" viewBox=\"0 0 25 40\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"2\" points=\"20.527,1.5 2,20.024 20.525,38.547 \"/></svg>";

    var spinner = "<svg width=\"30\" height=\"30\" viewBox=\"0 0 30 30\" xmlns=\"http://www.w3.org/2000/svg\"><circle fill=\"none\" stroke=\"#000\" cx=\"15\" cy=\"15\" r=\"14\"/></svg>";

    var totop = "<svg width=\"18\" height=\"10\" viewBox=\"0 0 18 10\" xmlns=\"http://www.w3.org/2000/svg\"><polyline fill=\"none\" stroke=\"#000\" stroke-width=\"1.2\" points=\"1 9 9 1 17 9 \"/></svg>";

    var parsed = {};
    var icons = {
        spinner: spinner,
        totop: totop,
        marker: marker,
        'close-icon': closeIcon,
        'close-large': closeLarge,
        'navbar-toggle-icon': navbarToggleIcon,
        'overlay-icon': overlayIcon,
        'pagination-next': paginationNext,
        'pagination-previous': paginationPrevious,
        'search-icon': searchIcon,
        'search-large': searchLarge,
        'search-navbar': searchNavbar,
        'slidenav-next': slidenavNext,
        'slidenav-next-large': slidenavNextLarge,
        'slidenav-previous': slidenavPrevious,
        'slidenav-previous-large': slidenavPreviousLarge
    };

    var Icon = {

        install: install,

        extends: SVG,

        args: 'icon',

        props: ['icon'],

        data: {
            include: ['focusable']
        },

        isIcon: true,

        beforeConnect: function() {
            addClass(this.$el, 'uk-icon');
        },

        methods: {

            getSvg: function() {

                var icon = getIcon(applyRtl(this.icon));

                if (!icon) {
                    return Promise.reject('Icon not found.');
                }

                return Promise.resolve(icon);
            }

        }

    };

    var IconComponent = {

        args: false,

        extends: Icon,

        data: function (vm) { return ({
            icon: hyphenate(vm.constructor.options.name)
        }); },

        beforeConnect: function() {
            addClass(this.$el, this.$name);
        }

    };

    var Slidenav = {

        extends: IconComponent,

        beforeConnect: function() {
            addClass(this.$el, 'uk-slidenav');
        },

        computed: {

            icon: function(ref, $el) {
                var icon = ref.icon;

                return hasClass($el, 'uk-slidenav-large')
                    ? (icon + "-large")
                    : icon;
            }

        }

    };

    var Search = {

        extends: IconComponent,

        computed: {

            icon: function(ref, $el) {
                var icon = ref.icon;

                return hasClass($el, 'uk-search-icon') && parents($el, '.uk-search-large').length
                    ? 'search-large'
                    : parents($el, '.uk-search-navbar').length
                        ? 'search-navbar'
                        : icon;
            }

        }

    };

    var Close = {

        extends: IconComponent,

        computed: {

            icon: function() {
                return ("close-" + (hasClass(this.$el, 'uk-close-large') ? 'large' : 'icon'));
            }

        }

    };

    var Spinner = {

        extends: IconComponent,

        connected: function() {
            var this$1 = this;

            this.svg.then(function (svg) { return this$1.ratio !== 1 && css($('circle', svg), 'strokeWidth', 1 / this$1.ratio); }, noop);
        }

    };

    function install(UIkit) {
        UIkit.icon.add = function (name, svg) {
            var obj;


            var added = isString(name) ? (( obj = {}, obj[name] = svg, obj )) : name;
            each(added, function (svg, name) {
                icons[name] = svg;
                delete parsed[name];
            });

            if (UIkit._initialized) {
                apply(document.body, function (el) { return each(UIkit.getComponents(el), function (cmp) {
                        cmp.$options.isIcon && cmp.icon in added && cmp.$reset();
                    }); }
                );
            }
        };
    }

    function getIcon(icon) {

        if (!icons[icon]) {
            return null;
        }

        if (!parsed[icon]) {
            parsed[icon] = $(icons[icon].trim());
        }

        return parsed[icon].cloneNode(true);
    }

    function applyRtl(icon) {
        return isRtl ? swap(swap(icon, 'left', 'right'), 'previous', 'next') : icon;
    }

    var img = {

        args: 'dataSrc',

        props: {
            dataSrc: String,
            dataSrcset: Boolean,
            sizes: String,
            width: Number,
            height: Number,
            offsetTop: String,
            offsetLeft: String,
            target: String
        },

        data: {
            dataSrc: '',
            dataSrcset: false,
            sizes: false,
            width: false,
            height: false,
            offsetTop: '50vh',
            offsetLeft: 0,
            target: false
        },

        computed: {

            cacheKey: function(ref) {
                var dataSrc = ref.dataSrc;

                return ((this.$name) + "." + dataSrc);
            },

            width: function(ref) {
                var width = ref.width;
                var dataWidth = ref.dataWidth;

                return width || dataWidth;
            },

            height: function(ref) {
                var height = ref.height;
                var dataHeight = ref.dataHeight;

                return height || dataHeight;
            },

            sizes: function(ref) {
                var sizes = ref.sizes;
                var dataSizes = ref.dataSizes;

                return sizes || dataSizes;
            },

            isImg: function(_, $el) {
                return isImg($el);
            },

            target: {

                get: function(ref) {
                    var target = ref.target;

                    return [this.$el ].concat( queryAll(target, this.$el));
                },

                watch: function() {
                    this.observe();
                }

            },

            offsetTop: function(ref) {
                var offsetTop = ref.offsetTop;

                return toPx(offsetTop, 'height');
            },

            offsetLeft: function(ref) {
                var offsetLeft = ref.offsetLeft;

                return toPx(offsetLeft, 'width');
            }

        },

        connected: function() {

            if (storage[this.cacheKey]) {
                setSrcAttrs(this.$el, storage[this.cacheKey] || this.dataSrc, this.dataSrcset, this.sizes);
            } else if (this.isImg && this.width && this.height) {
                setSrcAttrs(this.$el, getPlaceholderImage(this.width, this.height, this.sizes));
            }

            this.observer = new IntersectionObserver(this.load, {
                rootMargin: ((this.offsetTop) + "px " + (this.offsetLeft) + "px")
            });

            requestAnimationFrame(this.observe);

        },

        disconnected: function() {
            this.observer.disconnect();
        },

        update: {

            read: function(ref) {
                var this$1 = this;
                var image = ref.image;


                if (!image && document.readyState === 'complete') {
                    this.load(this.observer.takeRecords());
                }

                if (this.isImg) {
                    return false;
                }

                image && image.then(function (img) { return img && img.currentSrc !== '' && setSrcAttrs(this$1.$el, currentSrc(img)); });

            },

            write: function(data) {

                if (this.dataSrcset && window.devicePixelRatio !== 1) {

                    var bgSize = css(this.$el, 'backgroundSize');
                    if (bgSize.match(/^(auto\s?)+$/) || toFloat(bgSize) === data.bgSize) {
                        data.bgSize = getSourceSize(this.dataSrcset, this.sizes);
                        css(this.$el, 'backgroundSize', ((data.bgSize) + "px"));
                    }

                }

            },

            events: ['resize']

        },

        methods: {

            load: function(entries) {
                var this$1 = this;


                // Old chromium based browsers (UC Browser) did not implement `isIntersecting`
                if (!entries.some(function (entry) { return isUndefined(entry.isIntersecting) || entry.isIntersecting; })) {
                    return;
                }

                this._data.image = getImage(this.dataSrc, this.dataSrcset, this.sizes).then(function (img) {

                    setSrcAttrs(this$1.$el, currentSrc(img), img.srcset, img.sizes);
                    storage[this$1.cacheKey] = currentSrc(img);
                    return img;

                }, noop);

                this.observer.disconnect();
            },

            observe: function() {
                var this$1 = this;

                if (this._connected && !this._data.image) {
                    this.target.forEach(function (el) { return this$1.observer.observe(el); });
                }
            }

        }

    };

    function setSrcAttrs(el, src, srcset, sizes) {

        if (isImg(el)) {
            sizes && (el.sizes = sizes);
            srcset && (el.srcset = srcset);
            src && (el.src = src);
        } else if (src) {

            var change = !includes(el.style.backgroundImage, src);
            if (change) {
                css(el, 'backgroundImage', ("url(" + (escape(src)) + ")"));
                trigger(el, createEvent('load', false));
            }

        }

    }

    function getPlaceholderImage(width, height, sizes) {
        var assign;


        if (sizes) {
            ((assign = Dimensions.ratio({width: width, height: height}, 'width', toPx(sizesToPixel(sizes))), width = assign.width, height = assign.height));
        }

        return ("data:image/svg+xml;utf8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"" + width + "\" height=\"" + height + "\"></svg>");
    }

    var sizesRe = /\s*(.*?)\s*(\w+|calc\(.*?\))\s*(?:,|$)/g;
    function sizesToPixel(sizes) {
        var matches;

        sizesRe.lastIndex = 0;

        while ((matches = sizesRe.exec(sizes))) {
            if (!matches[1] || window.matchMedia(matches[1]).matches) {
                matches = evaluateSize(matches[2]);
                break;
            }
        }

        return matches || '100vw';
    }

    var sizeRe = /\d+(?:\w+|%)/g;
    var additionRe = /[+-]?(\d+)/g;
    function evaluateSize(size) {
        return startsWith(size, 'calc')
            ? size
                .substring(5, size.length - 1)
                .replace(sizeRe, function (size) { return toPx(size); })
                .replace(/ /g, '')
                .match(additionRe)
                .reduce(function (a, b) { return a + +b; }, 0)
            : size;
    }

    var srcSetRe = /\s+\d+w\s*(?:,|$)/g;
    function getSourceSize(srcset, sizes) {
        var srcSize = toPx(sizesToPixel(sizes));
        var descriptors = (srcset.match(srcSetRe) || []).map(toFloat).sort(function (a, b) { return a - b; });

        return descriptors.filter(function (size) { return size >= srcSize; })[0] || descriptors.pop() || '';
    }

    function isImg(el) {
        return el.tagName === 'IMG';
    }

    function currentSrc(el) {
        return el.currentSrc || el.src;
    }

    var key = '__test__';
    var storage;

    // workaround for Safari's private browsing mode and accessing sessionStorage in Blink
    try {
        storage = window.sessionStorage || {};
        storage[key] = 1;
        delete storage[key];
    } catch (e) {
        storage = {};
    }

    var Media = {

        props: {
            media: Boolean
        },

        data: {
            media: false
        },

        computed: {

            matchMedia: function() {
                var media = toMedia(this.media);
                return !media || window.matchMedia(media).matches;
            }

        }

    };

    function toMedia(value) {

        if (isString(value)) {
            if (value[0] === '@') {
                var name = "breakpoint-" + (value.substr(1));
                value = toFloat(getCssVar(name));
            } else if (isNaN(value)) {
                return value;
            }
        }

        return value && !isNaN(value) ? ("(min-width: " + value + "px)") : false;
    }

    var leader = {

        mixins: [Class, Media],

        props: {
            fill: String
        },

        data: {
            fill: '',
            clsWrapper: 'uk-leader-fill',
            clsHide: 'uk-leader-hide',
            attrFill: 'data-fill'
        },

        computed: {

            fill: function(ref) {
                var fill = ref.fill;

                return fill || getCssVar('leader-fill-content');
            }

        },

        connected: function() {
            var assign;

            (assign = wrapInner(this.$el, ("<span class=\"" + (this.clsWrapper) + "\">")), this.wrapper = assign[0]);
        },

        disconnected: function() {
            unwrap(this.wrapper.childNodes);
        },

        update: {

            read: function(ref) {
                var changed = ref.changed;
                var width = ref.width;


                var prev = width;

                width = Math.floor(this.$el.offsetWidth / 2);

                return {
                    width: width,
                    fill: this.fill,
                    changed: changed || prev !== width,
                    hide: !this.matchMedia
                };
            },

            write: function(data) {

                toggleClass(this.wrapper, this.clsHide, data.hide);

                if (data.changed) {
                    data.changed = false;
                    attr(this.wrapper, this.attrFill, new Array(data.width).join(data.fill));
                }

            },

            events: ['resize']

        }

    };

    var Container = {

        props: {
            container: Boolean
        },

        data: {
            container: true
        },

        computed: {

            container: function(ref) {
                var container = ref.container;

                return container === true && this.$container || container && $(container);
            }

        }

    };

    var active$1 = [];

    var Modal = {

        mixins: [Class, Container, Togglable],

        props: {
            selPanel: String,
            selClose: String,
            escClose: Boolean,
            bgClose: Boolean,
            stack: Boolean
        },

        data: {
            cls: 'uk-open',
            escClose: true,
            bgClose: true,
            overlay: true,
            stack: false
        },

        computed: {

            panel: function(ref, $el) {
                var selPanel = ref.selPanel;

                return $(selPanel, $el);
            },

            transitionElement: function() {
                return this.panel;
            },

            bgClose: function(ref) {
                var bgClose = ref.bgClose;

                return bgClose && this.panel;
            }

        },

        beforeDisconnect: function() {
            if (this.isToggled()) {
                this.toggleElement(this.$el, false, false);
            }
        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return this.selClose;
                },

                handler: function(e) {
                    e.preventDefault();
                    this.hide();
                }

            },

            {

                name: 'toggle',

                self: true,

                handler: function(e) {

                    if (e.defaultPrevented) {
                        return;
                    }

                    e.preventDefault();

                    if (this.isToggled() === includes(active$1, this)) {
                        this.toggle();
                    }
                }

            },

            {
                name: 'beforeshow',

                self: true,

                handler: function(e) {

                    if (includes(active$1, this)) {
                        return false;
                    }

                    if (!this.stack && active$1.length) {
                        Promise.all(active$1.map(function (modal) { return modal.hide(); })).then(this.show);
                        e.preventDefault();
                    } else {
                        active$1.push(this);
                    }
                }

            },

            {

                name: 'show',

                self: true,

                handler: function() {
                    var this$1 = this;


                    if (width(window) - width(document) && this.overlay) {
                        css(document.body, 'overflowY', 'scroll');
                    }

                    this.stack && css(this.$el, 'zIndex', css(this.$el, 'zIndex') + active$1.length);

                    addClass(document.documentElement, this.clsPage);

                    if (this.bgClose) {
                        once(this.$el, 'hide', on(document, pointerDown, function (ref) {
                            var target = ref.target;


                            if (last(active$1) !== this$1 || this$1.overlay && !within(target, this$1.$el) || within(target, this$1.panel)) {
                                return;
                            }

                            once(document, (pointerUp + " " + pointerCancel + " scroll"), function (ref) {
                                var defaultPrevented = ref.defaultPrevented;
                                var type = ref.type;
                                var newTarget = ref.target;

                                if (!defaultPrevented && type === pointerUp && target === newTarget) {
                                    this$1.hide();
                                }
                            }, true);

                        }), {self: true});
                    }

                    if (this.escClose) {
                        once(this.$el, 'hide', on(document, 'keydown', function (e) {
                            if (e.keyCode === 27 && last(active$1) === this$1) {
                                e.preventDefault();
                                this$1.hide();
                            }
                        }), {self: true});
                    }
                }

            },

            {

                name: 'hidden',

                self: true,

                handler: function() {
                    var this$1 = this;


                    active$1.splice(active$1.indexOf(this), 1);

                    if (!active$1.length) {
                        css(document.body, 'overflowY', '');
                    }

                    css(this.$el, 'zIndex', '');

                    if (!active$1.some(function (modal) { return modal.clsPage === this$1.clsPage; })) {
                        removeClass(document.documentElement, this.clsPage);
                    }

                }

            }

        ],

        methods: {

            toggle: function() {
                return this.isToggled() ? this.hide() : this.show();
            },

            show: function() {
                var this$1 = this;


                if (this.container && this.$el.parentNode !== this.container) {
                    append(this.container, this.$el);
                    return new Promise(function (resolve) { return requestAnimationFrame(function () { return this$1.show().then(resolve); }
                        ); }
                    );
                }

                return this.toggleElement(this.$el, true, animate$1(this));
            },

            hide: function() {
                return this.toggleElement(this.$el, false, animate$1(this));
            }

        }

    };

    function animate$1(ref) {
        var transitionElement = ref.transitionElement;
        var _toggle = ref._toggle;

        return function (el, show) { return new Promise(function (resolve, reject) { return once(el, 'show hide', function () {
                    el._reject && el._reject();
                    el._reject = reject;

                    _toggle(el, show);

                    var off = once(transitionElement, 'transitionstart', function () {
                        once(transitionElement, 'transitionend transitioncancel', resolve, {self: true});
                        clearTimeout(timer);
                    }, {self: true});

                    var timer = setTimeout(function () {
                        off();
                        resolve();
                    }, toMs(css(transitionElement, 'transitionDuration')));

                }); }
            ); };
    }

    var modal = {

        install: install$1,

        mixins: [Modal],

        data: {
            clsPage: 'uk-modal-page',
            selPanel: '.uk-modal-dialog',
            selClose: '.uk-modal-close, .uk-modal-close-default, .uk-modal-close-outside, .uk-modal-close-full'
        },

        events: [

            {
                name: 'show',

                self: true,

                handler: function() {

                    if (hasClass(this.panel, 'uk-margin-auto-vertical')) {
                        addClass(this.$el, 'uk-flex');
                    } else {
                        css(this.$el, 'display', 'block');
                    }

                    height(this.$el); // force reflow
                }
            },

            {
                name: 'hidden',

                self: true,

                handler: function() {

                    css(this.$el, 'display', '');
                    removeClass(this.$el, 'uk-flex');

                }
            }

        ]

    };

    function install$1(ref) {
        var modal = ref.modal;


        modal.dialog = function (content, options) {

            var dialog = modal(
                ("<div class=\"uk-modal\"> <div class=\"uk-modal-dialog\">" + content + "</div> </div>"),
                options
            );

            dialog.show();

            on(dialog.$el, 'hidden', function () { return Promise.resolve().then(function () { return dialog.$destroy(true); }
                ); }, {self: true}
            );

            return dialog;
        };

        modal.alert = function (message, options) {
            return openDialog(
                function (ref) {
                    var labels = ref.labels;

                    return ("<div class=\"uk-modal-body\">" + (isString(message) ? message : html(message)) + "</div> <div class=\"uk-modal-footer uk-text-right\"> <button class=\"uk-button uk-button-primary uk-modal-close\" autofocus>" + (labels.ok) + "</button> </div>");
            },
                options,
                function (deferred) { return deferred.resolve(); }
            );
        };

        modal.confirm = function (message, options) {
            return openDialog(
                function (ref) {
                    var labels = ref.labels;

                    return ("<form> <div class=\"uk-modal-body\">" + (isString(message) ? message : html(message)) + "</div> <div class=\"uk-modal-footer uk-text-right\"> <button class=\"uk-button uk-button-default uk-modal-close\" type=\"button\">" + (labels.cancel) + "</button> <button class=\"uk-button uk-button-primary\" autofocus>" + (labels.ok) + "</button> </div> </form>");
            },
                options,
                function (deferred) { return deferred.reject(); }
            );
        };

        modal.prompt = function (message, value, options) {
            return openDialog(
                function (ref) {
                    var labels = ref.labels;

                    return ("<form class=\"uk-form-stacked\"> <div class=\"uk-modal-body\"> <label>" + (isString(message) ? message : html(message)) + "</label> <input class=\"uk-input\" value=\"" + (value || '') + "\" autofocus> </div> <div class=\"uk-modal-footer uk-text-right\"> <button class=\"uk-button uk-button-default uk-modal-close\" type=\"button\">" + (labels.cancel) + "</button> <button class=\"uk-button uk-button-primary\">" + (labels.ok) + "</button> </div> </form>");
            },
                options,
                function (deferred) { return deferred.resolve(null); },
                function (dialog) { return $('input', dialog.$el).value; }
            );
        };

        modal.labels = {
            ok: 'Ok',
            cancel: 'Cancel'
        };

        function openDialog(tmpl, options, hideFn, submitFn) {

            options = assign({bgClose: false, escClose: true, labels: modal.labels}, options);

            var dialog = modal.dialog(tmpl(options), options);
            var deferred = new Deferred();

            var resolved = false;

            on(dialog.$el, 'submit', 'form', function (e) {
                e.preventDefault();
                deferred.resolve(submitFn && submitFn(dialog));
                resolved = true;
                dialog.hide();
            });

            on(dialog.$el, 'hide', function () { return !resolved && hideFn(deferred); });

            deferred.promise.dialog = dialog;

            return deferred.promise;
        }

    }

    var nav = {

        extends: Accordion,

        data: {
            targets: '> .uk-parent',
            toggle: '> a',
            content: '> ul'
        }

    };

    var navbar = {

        mixins: [Class, FlexBug],

        props: {
            dropdown: String,
            mode: 'list',
            align: String,
            offset: Number,
            boundary: Boolean,
            boundaryAlign: Boolean,
            clsDrop: String,
            delayShow: Number,
            delayHide: Number,
            dropbar: Boolean,
            dropbarMode: String,
            dropbarAnchor: Boolean,
            duration: Number
        },

        data: {
            dropdown: '.uk-navbar-nav > li',
            align: !isRtl ? 'left' : 'right',
            clsDrop: 'uk-navbar-dropdown',
            mode: undefined,
            offset: undefined,
            delayShow: undefined,
            delayHide: undefined,
            boundaryAlign: undefined,
            flip: 'x',
            boundary: true,
            dropbar: false,
            dropbarMode: 'slide',
            dropbarAnchor: false,
            duration: 200,
            forceHeight: true,
            selMinHeight: '.uk-navbar-nav > li > a, .uk-navbar-item, .uk-navbar-toggle'
        },

        computed: {

            boundary: function(ref, $el) {
                var boundary = ref.boundary;
                var boundaryAlign = ref.boundaryAlign;

                return (boundary === true || boundaryAlign) ? $el : boundary;
            },

            dropbarAnchor: function(ref, $el) {
                var dropbarAnchor = ref.dropbarAnchor;

                return query(dropbarAnchor, $el);
            },

            pos: function(ref) {
                var align = ref.align;

                return ("bottom-" + align);
            },

            dropbar: {

                get: function(ref) {
                    var dropbar = ref.dropbar;


                    if (!dropbar) {
                        return null;
                    }

                    dropbar = this._dropbar || query(dropbar, this.$el) || $('+ .uk-navbar-dropbar', this.$el);

                    return dropbar ? dropbar : (this._dropbar = $('<div></div>'));

                },

                watch: function(dropbar) {
                    addClass(dropbar, 'uk-navbar-dropbar');
                    toggleClass(dropbar, 'uk-navbar-dropbar-slide', this.dropbarMode === 'slide');
                },

                immediate: true

            },

            dropdowns: {

                get: function(ref, $el) {
                    var dropdown = ref.dropdown;
                    var clsDrop = ref.clsDrop;

                    return $$((dropdown + " ." + clsDrop), $el);
                },

                watch: function(dropdowns) {
                    var this$1 = this;

                    this.$create(
                        'drop',
                        dropdowns.filter(function (el) { return !this$1.getDropdown(el); }),
                        assign({}, this.$props, {boundary: this.boundary, pos: this.pos, offset: this.dropbar || this.offset})
                    );
                },

                immediate: true

            }

        },

        disconnected: function() {
            this.dropbar && remove(this.dropbar);
            delete this._dropbar;
        },

        events: [

            {
                name: 'mouseover',

                delegate: function() {
                    return this.dropdown;
                },

                handler: function(ref) {
                    var current = ref.current;

                    var active = this.getActive();
                    if (active && active.toggle && !within(active.toggle.$el, current) && !active.tracker.movesTo(active.$el)) {
                        active.hide(false);
                    }
                }

            },

            {
                name: 'mouseleave',

                el: function() {
                    return this.dropbar;
                },

                handler: function() {
                    var active = this.getActive();

                    if (active && !this.dropdowns.some(function (el) { return matches(el, ':hover'); })) {
                        active.hide();
                    }
                }
            },

            {
                name: 'beforeshow',

                capture: true,

                filter: function() {
                    return this.dropbar;
                },

                handler: function() {

                    if (!this.dropbar.parentNode) {
                        after(this.dropbarAnchor || this.$el, this.dropbar);
                    }

                }
            },

            {
                name: 'show',

                capture: true,

                filter: function() {
                    return this.dropbar;
                },

                handler: function(_, drop) {

                    var $el = drop.$el;
                    var dir = drop.dir;

                    this.clsDrop && addClass($el, ((this.clsDrop) + "-dropbar"));

                    if (dir === 'bottom') {
                        this.transitionTo($el.offsetHeight + toFloat(css($el, 'marginTop')) + toFloat(css($el, 'marginBottom')), $el);
                    }
                }
            },

            {
                name: 'beforehide',

                filter: function() {
                    return this.dropbar;
                },

                handler: function(e, ref) {
                    var $el = ref.$el;


                    var active = this.getActive();

                    if (matches(this.dropbar, ':hover') && active && active.$el === $el) {
                        e.preventDefault();
                    }
                }
            },

            {
                name: 'hide',

                filter: function() {
                    return this.dropbar;
                },

                handler: function(_, ref) {
                    var $el = ref.$el;


                    var active = this.getActive();

                    if (!active || active && active.$el === $el) {
                        this.transitionTo(0);
                    }
                }
            }

        ],

        methods: {

            getActive: function() {
                var ref = this.dropdowns.map(this.getDropdown).filter(function (drop) { return drop && drop.isActive(); });
                var active = ref[0];
                return active && includes(active.mode, 'hover') && within(active.toggle.$el, this.$el) && active;
            },

            transitionTo: function(newHeight, el) {
                var this$1 = this;


                var ref = this;
                var dropbar = ref.dropbar;
                var oldHeight = isVisible(dropbar) ? height(dropbar) : 0;

                el = oldHeight < newHeight && el;

                css(el, 'clip', ("rect(0," + (el.offsetWidth) + "px," + oldHeight + "px,0)"));

                height(dropbar, oldHeight);

                Transition.cancel([el, dropbar]);
                return Promise.all([
                    Transition.start(dropbar, {height: newHeight}, this.duration),
                    Transition.start(el, {clip: ("rect(0," + (el.offsetWidth) + "px," + newHeight + "px,0)")}, this.duration)
                ])
                    .catch(noop)
                    .then(function () {
                        css(el, {clip: ''});
                        this$1.$update(dropbar);
                    });
            },

            getDropdown: function(el) {
                return this.$getComponent(el, 'drop') || this.$getComponent(el, 'dropdown');
            }

        }

    };

    var offcanvas = {

        mixins: [Modal],

        args: 'mode',

        props: {
            mode: String,
            flip: Boolean,
            overlay: Boolean
        },

        data: {
            mode: 'slide',
            flip: false,
            overlay: false,
            clsPage: 'uk-offcanvas-page',
            clsContainer: 'uk-offcanvas-container',
            selPanel: '.uk-offcanvas-bar',
            clsFlip: 'uk-offcanvas-flip',
            clsContainerAnimation: 'uk-offcanvas-container-animation',
            clsSidebarAnimation: 'uk-offcanvas-bar-animation',
            clsMode: 'uk-offcanvas',
            clsOverlay: 'uk-offcanvas-overlay',
            selClose: '.uk-offcanvas-close',
            container: false
        },

        computed: {

            clsFlip: function(ref) {
                var flip = ref.flip;
                var clsFlip = ref.clsFlip;

                return flip ? clsFlip : '';
            },

            clsOverlay: function(ref) {
                var overlay = ref.overlay;
                var clsOverlay = ref.clsOverlay;

                return overlay ? clsOverlay : '';
            },

            clsMode: function(ref) {
                var mode = ref.mode;
                var clsMode = ref.clsMode;

                return (clsMode + "-" + mode);
            },

            clsSidebarAnimation: function(ref) {
                var mode = ref.mode;
                var clsSidebarAnimation = ref.clsSidebarAnimation;

                return mode === 'none' || mode === 'reveal' ? '' : clsSidebarAnimation;
            },

            clsContainerAnimation: function(ref) {
                var mode = ref.mode;
                var clsContainerAnimation = ref.clsContainerAnimation;

                return mode !== 'push' && mode !== 'reveal' ? '' : clsContainerAnimation;
            },

            transitionElement: function(ref) {
                var mode = ref.mode;

                return mode === 'reveal' ? this.panel.parentNode : this.panel;
            }

        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return 'a[href^="#"]';
                },

                handler: function(ref) {
                    var hash = ref.current.hash;
                    var defaultPrevented = ref.defaultPrevented;

                    if (!defaultPrevented && hash && $(hash, document.body)) {
                        this.hide();
                    }
                }

            },

            {
                name: 'touchstart',

                passive: true,

                el: function() {
                    return this.panel;
                },

                handler: function(ref) {
                    var targetTouches = ref.targetTouches;


                    if (targetTouches.length === 1) {
                        this.clientY = targetTouches[0].clientY;
                    }

                }

            },

            {
                name: 'touchmove',

                self: true,
                passive: false,

                filter: function() {
                    return this.overlay;
                },

                handler: function(e) {
                    e.cancelable && e.preventDefault();
                }

            },

            {
                name: 'touchmove',

                passive: false,

                el: function() {
                    return this.panel;
                },

                handler: function(e) {

                    if (e.targetTouches.length !== 1) {
                        return;
                    }

                    var clientY = event.targetTouches[0].clientY - this.clientY;
                    var ref = this.panel;
                    var scrollTop = ref.scrollTop;
                    var scrollHeight = ref.scrollHeight;
                    var clientHeight = ref.clientHeight;

                    if (clientHeight >= scrollHeight
                        || scrollTop === 0 && clientY > 0
                        || scrollHeight - scrollTop <= clientHeight && clientY < 0
                    ) {
                        e.cancelable && e.preventDefault();
                    }

                }

            },

            {
                name: 'show',

                self: true,

                handler: function() {

                    if (this.mode === 'reveal' && !hasClass(this.panel.parentNode, this.clsMode)) {
                        wrapAll(this.panel, '<div>');
                        addClass(this.panel.parentNode, this.clsMode);
                    }

                    css(document.documentElement, 'overflowY', this.overlay ? 'hidden' : '');
                    addClass(document.body, this.clsContainer, this.clsFlip);
                    css(document.body, 'touch-action', 'pan-y pinch-zoom');
                    css(this.$el, 'display', 'block');
                    addClass(this.$el, this.clsOverlay);
                    addClass(this.panel, this.clsSidebarAnimation, this.mode !== 'reveal' ? this.clsMode : '');

                    height(document.body); // force reflow
                    addClass(document.body, this.clsContainerAnimation);

                    this.clsContainerAnimation && suppressUserScale();


                }
            },

            {
                name: 'hide',

                self: true,

                handler: function() {
                    removeClass(document.body, this.clsContainerAnimation);
                    css(document.body, 'touch-action', '');
                }
            },

            {
                name: 'hidden',

                self: true,

                handler: function() {

                    this.clsContainerAnimation && resumeUserScale();

                    if (this.mode === 'reveal') {
                        unwrap(this.panel);
                    }

                    removeClass(this.panel, this.clsSidebarAnimation, this.clsMode);
                    removeClass(this.$el, this.clsOverlay);
                    css(this.$el, 'display', '');
                    removeClass(document.body, this.clsContainer, this.clsFlip);

                    css(document.documentElement, 'overflowY', '');

                }
            },

            {
                name: 'swipeLeft swipeRight',

                handler: function(e) {

                    if (this.isToggled() && endsWith(e.type, 'Left') ^ this.flip) {
                        this.hide();
                    }

                }
            }

        ]

    };

    // Chrome in responsive mode zooms page upon opening offcanvas
    function suppressUserScale() {
        getViewport$1().content += ',user-scalable=0';
    }

    function resumeUserScale() {
        var viewport = getViewport$1();
        viewport.content = viewport.content.replace(/,user-scalable=0$/, '');
    }

    function getViewport$1() {
        return $('meta[name="viewport"]', document.head) || append(document.head, '<meta name="viewport">');
    }

    var overflowAuto = {

        mixins: [Class],

        props: {
            selContainer: String,
            selContent: String
        },

        data: {
            selContainer: '.uk-modal',
            selContent: '.uk-modal-dialog'
        },

        computed: {

            container: function(ref, $el) {
                var selContainer = ref.selContainer;

                return closest($el, selContainer);
            },

            content: function(ref, $el) {
                var selContent = ref.selContent;

                return closest($el, selContent);
            }

        },

        connected: function() {
            css(this.$el, 'minHeight', 150);
        },

        update: {

            read: function() {

                if (!this.content || !this.container) {
                    return false;
                }

                return {
                    current: toFloat(css(this.$el, 'maxHeight')),
                    max: Math.max(150, height(this.container) - (offset(this.content).height - height(this.$el)))
                };
            },

            write: function(ref) {
                var current = ref.current;
                var max = ref.max;

                css(this.$el, 'maxHeight', max);
                if (Math.round(current) !== Math.round(max)) {
                    trigger(this.$el, 'resize');
                }
            },

            events: ['resize']

        }

    };

    var responsive = {

        props: ['width', 'height'],

        connected: function() {
            addClass(this.$el, 'uk-responsive-width');
        },

        update: {

            read: function() {
                return isVisible(this.$el) && this.width && this.height
                    ? {width: width(this.$el.parentNode), height: this.height}
                    : false;
            },

            write: function(dim) {
                height(this.$el, Dimensions.contain({
                    height: this.height,
                    width: this.width
                }, dim).height);
            },

            events: ['resize']

        }

    };

    var scroll = {

        props: {
            offset: Number
        },

        data: {
            offset: 0
        },

        methods: {

            scrollTo: function(el) {
                var this$1 = this;


                el = el && $(el) || document.body;

                if (trigger(this.$el, 'beforescroll', [this, el])) {
                    scrollIntoView(el, {offset: this.offset}).then(function () { return trigger(this$1.$el, 'scrolled', [this$1, el]); }
                    );
                }

            }

        },

        events: {

            click: function(e) {

                if (e.defaultPrevented) {
                    return;
                }

                e.preventDefault();
                this.scrollTo(escape(decodeURIComponent(this.$el.hash)).substr(1));
            }

        }

    };

    var scrollspy = {

        args: 'cls',

        props: {
            cls: String,
            target: String,
            hidden: Boolean,
            offsetTop: Number,
            offsetLeft: Number,
            repeat: Boolean,
            delay: Number
        },

        data: function () { return ({
            cls: false,
            target: false,
            hidden: true,
            offsetTop: 0,
            offsetLeft: 0,
            repeat: false,
            delay: 0,
            inViewClass: 'uk-scrollspy-inview'
        }); },

        computed: {

            elements: {

                get: function(ref, $el) {
                    var target = ref.target;

                    return target ? $$(target, $el) : [$el];
                },

                watch: function(elements) {
                    if (this.hidden) {
                        css(filter(elements, (":not(." + (this.inViewClass) + ")")), 'visibility', 'hidden');
                    }
                },

                immediate: true

            }

        },

        update: [

            {

                read: function(ref) {
                    var this$1 = this;
                    var update = ref.update;


                    if (!update) {
                        return;
                    }

                    this.elements.forEach(function (el) {

                        var state = el._ukScrollspyState;

                        if (!state) {
                            state = {cls: data(el, 'uk-scrollspy-class') || this$1.cls};
                        }

                        state.show = isInView(el, this$1.offsetTop, this$1.offsetLeft);
                        el._ukScrollspyState = state;

                    });

                },

                write: function(data) {
                    var this$1 = this;


                    // Let child components be applied at least once first
                    if (!data.update) {
                        this.$update();
                        return data.update = true;
                    }

                    this.elements.forEach(function (el) {

                        var state = el._ukScrollspyState;
                        var toggle = function (inview) {

                            css(el, 'visibility', !inview && this$1.hidden ? 'hidden' : '');

                            toggleClass(el, this$1.inViewClass, inview);
                            toggleClass(el, state.cls);

                            trigger(el, inview ? 'inview' : 'outview');

                            state.inview = inview;

                            this$1.$update(el);

                        };

                        if (state.show && !state.inview && !state.queued) {

                            state.queued = true;

                            data.promise = (data.promise || Promise.resolve()).then(function () { return new Promise(function (resolve) { return setTimeout(resolve, this$1.delay); }
                                ); }
                            ).then(function () {
                                toggle(true);
                                setTimeout(function () { return state.queued = false; }, 300);
                            });

                        } else if (!state.show && state.inview && !state.queued && this$1.repeat) {

                            toggle(false);

                        }

                    });

                },

                events: ['scroll', 'resize']

            }

        ]

    };

    var scrollspyNav = {

        props: {
            cls: String,
            closest: String,
            scroll: Boolean,
            overflow: Boolean,
            offset: Number
        },

        data: {
            cls: 'uk-active',
            closest: false,
            scroll: false,
            overflow: true,
            offset: 0
        },

        computed: {

            links: {

                get: function(_, $el) {
                    return $$('a[href^="#"]', $el).filter(function (el) { return el.hash; });
                },

                watch: function(links) {
                    if (this.scroll) {
                        this.$create('scroll', links, {offset: this.offset || 0});
                    }
                },

                immediate: true

            },

            targets: function() {
                return $$(this.links.map(function (el) { return escape(el.hash).substr(1); }).join(','));
            },

            elements: function(ref) {
                var selector = ref.closest;

                return closest(this.links, selector || '*');
            }

        },

        update: [

            {

                read: function() {
                    var this$1 = this;


                    var ref = this.targets;
                    var length = ref.length;

                    if (!length || !isVisible(this.$el)) {
                        return false;
                    }

                    var scrollElement = last(scrollParents(this.targets[0]));
                    var scrollTop = scrollElement.scrollTop;
                    var scrollHeight = scrollElement.scrollHeight;
                    var viewport = getViewport(scrollElement);
                    var max = scrollHeight - offset(viewport).height;
                    var active = false;

                    if (scrollTop === max) {
                        active = length - 1;
                    } else {

                        this.targets.every(function (el, i) {
                            if (position(el, viewport).top - this$1.offset <= 0) {
                                active = i;
                                return true;
                            }
                        });

                        if (active === false && this.overflow) {
                            active = 0;
                        }
                    }

                    return {active: active};
                },

                write: function(ref) {
                    var active = ref.active;


                    this.links.forEach(function (el) { return el.blur(); });
                    removeClass(this.elements, this.cls);

                    if (active !== false) {
                        trigger(this.$el, 'active', [active, addClass(this.elements[active], this.cls)]);
                    }

                },

                events: ['scroll', 'resize']

            }

        ]

    };

    var sticky = {

        mixins: [Class, Media],

        props: {
            top: null,
            bottom: Boolean,
            offset: String,
            animation: String,
            clsActive: String,
            clsInactive: String,
            clsFixed: String,
            clsBelow: String,
            selTarget: String,
            widthElement: Boolean,
            showOnUp: Boolean,
            targetOffset: Number
        },

        data: {
            top: 0,
            bottom: false,
            offset: 0,
            animation: '',
            clsActive: 'uk-active',
            clsInactive: '',
            clsFixed: 'uk-sticky-fixed',
            clsBelow: 'uk-sticky-below',
            selTarget: '',
            widthElement: false,
            showOnUp: false,
            targetOffset: false
        },

        computed: {

            offset: function(ref) {
                var offset = ref.offset;

                return toPx(offset);
            },

            selTarget: function(ref, $el) {
                var selTarget = ref.selTarget;

                return selTarget && $(selTarget, $el) || $el;
            },

            widthElement: function(ref, $el) {
                var widthElement = ref.widthElement;

                return query(widthElement, $el) || this.placeholder;
            },

            isActive: {

                get: function() {
                    return hasClass(this.selTarget, this.clsActive);
                },

                set: function(value) {
                    if (value && !this.isActive) {
                        replaceClass(this.selTarget, this.clsInactive, this.clsActive);
                        trigger(this.$el, 'active');
                    } else if (!value && !hasClass(this.selTarget, this.clsInactive)) {
                        replaceClass(this.selTarget, this.clsActive, this.clsInactive);
                        trigger(this.$el, 'inactive');
                    }
                }

            }

        },

        connected: function() {
            this.placeholder = $('+ .uk-sticky-placeholder', this.$el) || $('<div class="uk-sticky-placeholder"></div>');
            this.isFixed = false;
            this.isActive = false;
        },

        disconnected: function() {

            if (this.isFixed) {
                this.hide();
                removeClass(this.selTarget, this.clsInactive);
            }

            remove(this.placeholder);
            this.placeholder = null;
            this.widthElement = null;
        },

        events: [

            {

                name: 'load hashchange popstate',

                el: window,

                handler: function() {
                    var this$1 = this;


                    if (!(this.targetOffset !== false && location.hash && window.pageYOffset > 0)) {
                        return;
                    }

                    var target = $(location.hash);

                    if (target) {
                        fastdom.read(function () {

                            var ref = offset(target);
                            var top = ref.top;
                            var elTop = offset(this$1.$el).top;
                            var elHeight = this$1.$el.offsetHeight;

                            if (this$1.isFixed && elTop + elHeight >= top && elTop <= top + target.offsetHeight) {
                                scrollTop(window, top - elHeight - (isNumeric(this$1.targetOffset) ? this$1.targetOffset : 0) - this$1.offset);
                            }

                        });
                    }

                }

            }

        ],

        update: [

            {

                read: function(ref, type) {
                    var height = ref.height;


                    if (this.isActive && type !== 'update') {

                        this.hide();
                        height = this.$el.offsetHeight;
                        this.show();

                    }

                    height = !this.isActive ? this.$el.offsetHeight : height;

                    this.topOffset = offset(this.isFixed ? this.placeholder : this.$el).top;
                    this.bottomOffset = this.topOffset + height;

                    var bottom = parseProp('bottom', this);

                    this.top = Math.max(toFloat(parseProp('top', this)), this.topOffset) - this.offset;
                    this.bottom = bottom && bottom - height;
                    this.inactive = !this.matchMedia;

                    return {
                        lastScroll: false,
                        height: height,
                        margins: css(this.$el, ['marginTop', 'marginBottom', 'marginLeft', 'marginRight'])
                    };
                },

                write: function(ref) {
                    var height = ref.height;
                    var margins = ref.margins;


                    var ref$1 = this;
                    var placeholder = ref$1.placeholder;

                    css(placeholder, assign({height: height}, margins));

                    if (!within(placeholder, document)) {
                        after(this.$el, placeholder);
                        attr(placeholder, 'hidden', '');
                    }

                    // ensure active/inactive classes are applied
                    this.isActive = this.isActive;

                },

                events: ['resize']

            },

            {

                read: function(ref) {
                    var scroll = ref.scroll; if ( scroll === void 0 ) scroll = 0;


                    this.width = (isVisible(this.widthElement) ? this.widthElement : this.$el).offsetWidth;

                    this.scroll = window.pageYOffset;

                    return {
                        dir: scroll <= this.scroll ? 'down' : 'up',
                        scroll: this.scroll,
                        visible: isVisible(this.$el),
                        top: offsetPosition(this.placeholder)[0]
                    };
                },

                write: function(data, type) {
                    var this$1 = this;


                    var initTimestamp = data.initTimestamp; if ( initTimestamp === void 0 ) initTimestamp = 0;
                    var dir = data.dir;
                    var lastDir = data.lastDir;
                    var lastScroll = data.lastScroll;
                    var scroll = data.scroll;
                    var top = data.top;
                    var visible = data.visible;
                    var now = performance.now();

                    data.lastScroll = scroll;

                    if (scroll < 0 || scroll === lastScroll || !visible || this.disabled || this.showOnUp && type !== 'scroll') {
                        return;
                    }

                    if (now - initTimestamp > 300 || dir !== lastDir) {
                        data.initScroll = scroll;
                        data.initTimestamp = now;
                    }

                    data.lastDir = dir;

                    if (this.showOnUp && Math.abs(data.initScroll - scroll) <= 30 && Math.abs(lastScroll - scroll) <= 10) {
                        return;
                    }

                    if (this.inactive
                        || scroll < this.top
                        || this.showOnUp && (scroll <= this.top || dir === 'down' || dir === 'up' && !this.isFixed && scroll <= this.bottomOffset)
                    ) {

                        if (!this.isFixed) {

                            if (Animation.inProgress(this.$el) && top > scroll) {
                                Animation.cancel(this.$el);
                                this.hide();
                            }

                            return;
                        }

                        this.isFixed = false;

                        if (this.animation && scroll > this.topOffset) {
                            Animation.cancel(this.$el);
                            Animation.out(this.$el, this.animation).then(function () { return this$1.hide(); }, noop);
                        } else {
                            this.hide();
                        }

                    } else if (this.isFixed) {

                        this.update();

                    } else if (this.animation) {

                        Animation.cancel(this.$el);
                        this.show();
                        Animation.in(this.$el, this.animation).catch(noop);

                    } else {
                        this.show();
                    }

                },

                events: ['resize', 'scroll']

            }

        ],

        methods: {

            show: function() {

                this.isFixed = true;
                this.update();
                attr(this.placeholder, 'hidden', null);

            },

            hide: function() {

                this.isActive = false;
                removeClass(this.$el, this.clsFixed, this.clsBelow);
                css(this.$el, {position: '', top: '', width: ''});
                attr(this.placeholder, 'hidden', '');

            },

            update: function() {

                var active = this.top !== 0 || this.scroll > this.top;
                var top = Math.max(0, this.offset);

                if (this.bottom && this.scroll > this.bottom - this.offset) {
                    top = this.bottom - this.scroll;
                }

                css(this.$el, {
                    position: 'fixed',
                    top: (top + "px"),
                    width: this.width
                });

                this.isActive = active;
                toggleClass(this.$el, this.clsBelow, this.scroll > this.bottomOffset);
                addClass(this.$el, this.clsFixed);

            }

        }

    };

    function parseProp(prop, ref) {
        var $props = ref.$props;
        var $el = ref.$el;
        var propOffset = ref[(prop + "Offset")];


        var value = $props[prop];

        if (!value) {
            return;
        }

        if (isNumeric(value) && isString(value) && value.match(/^-?\d/)) {

            return propOffset + toPx(value);

        } else {

            return offset(value === true ? $el.parentNode : query(value, $el)).bottom;

        }
    }

    var Switcher = {

        mixins: [Togglable],

        args: 'connect',

        props: {
            connect: String,
            toggle: String,
            active: Number,
            swiping: Boolean
        },

        data: {
            connect: '~.uk-switcher',
            toggle: '> * > :first-child',
            active: 0,
            swiping: true,
            cls: 'uk-active',
            clsContainer: 'uk-switcher',
            attrItem: 'uk-switcher-item',
            queued: true
        },

        computed: {

            connects: {

                get: function(ref, $el) {
                    var connect = ref.connect;

                    return queryAll(connect, $el);
                },

                watch: function(connects) {
                    var this$1 = this;


                    connects.forEach(function (list) { return this$1.updateAria(list.children); });

                    if (this.swiping) {
                        css(connects, 'touch-action', 'pan-y pinch-zoom');
                    }

                },

                immediate: true

            },

            toggles: {

                get: function(ref, $el) {
                    var toggle = ref.toggle;

                    return $$(toggle, $el).filter(function (el) { return !matches(el, '.uk-disabled *, .uk-disabled, [disabled]'); });
                },

                watch: function(toggles) {
                    var active = this.index();
                    this.show(~active && active || toggles[this.active] || toggles[0]);
                },

                immediate: true

            }

        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return this.toggle;
                },

                handler: function(e) {
                    if (!includes(this.toggles, e.current)) {
                        return;
                    }
                    e.preventDefault();
                    this.show(e.current);
                }

            },

            {
                name: 'click',

                el: function() {
                    return this.connects;
                },

                delegate: function() {
                    return ("[" + (this.attrItem) + "],[data-" + (this.attrItem) + "]");
                },

                handler: function(e) {
                    e.preventDefault();
                    this.show(data(e.current, this.attrItem));
                }
            },

            {
                name: 'swipeRight swipeLeft',

                filter: function() {
                    return this.swiping;
                },

                el: function() {
                    return this.connects;
                },

                handler: function(ref) {
                    var type = ref.type;

                    this.show(endsWith(type, 'Left') ? 'next' : 'previous');
                }
            },

            {
                name: 'show',

                el: function() {
                    return this.connects;
                },

                handler: function() {
                    var this$1 = this;

                    var index = this.index();

                    this.toggles.forEach(function (toggle, i) {
                        toggleClass(children(this$1.$el).filter(function (el) { return within(toggle, el); }), this$1.cls, index === i);
                        attr(toggle, 'aria-expanded', index === i);
                    });
                }
            }

        ],

        methods: {

            index: function() {
                return index(children(this.connects[0], ("." + (this.cls)))[0]);
            },

            show: function(item) {
                var this$1 = this;


                var prev = this.index();
                var next = getIndex(item, this.toggles, prev);

                this.connects.forEach(function (ref) {
                        var children = ref.children;

                        return this$1.toggleElement([children[prev], children[next]], undefined, prev >= 0);
                }
                );
            }

        }

    };

    var tab = {

        mixins: [Class],

        extends: Switcher,

        props: {
            media: Boolean
        },

        data: {
            media: 960,
            attrItem: 'uk-tab-item'
        },

        connected: function() {

            var cls = hasClass(this.$el, 'uk-tab-left')
                ? 'uk-tab-left'
                : hasClass(this.$el, 'uk-tab-right')
                    ? 'uk-tab-right'
                    : false;

            if (cls) {
                this.$create('toggle', this.$el, {cls: cls, mode: 'media', media: this.media});
            }
        }

    };

    var toggle = {

        mixins: [Media, Togglable],

        args: 'target',

        props: {
            href: String,
            target: null,
            mode: 'list'
        },

        data: {
            href: false,
            target: false,
            mode: 'click',
            queued: true
        },

        computed: {

            target: {

                get: function(ref, $el) {
                    var href = ref.href;
                    var target = ref.target;

                    target = queryAll(target || href, $el);
                    return target.length && target || [$el];
                },

                watch: function() {
                    trigger(this.target, 'updatearia', [this]);
                },

                immediate: true

            }

        },

        events: [

            {

                name: (pointerEnter + " " + pointerLeave),

                filter: function() {
                    return includes(this.mode, 'hover');
                },

                handler: function(e) {
                    if (!isTouch(e)) {
                        this.toggle(("toggle" + (e.type === pointerEnter ? 'show' : 'hide')));
                    }
                }

            },

            {

                name: 'click',

                filter: function() {
                    return includes(this.mode, 'click') || hasTouch && includes(this.mode, 'hover');
                },

                handler: function(e) {

                    // TODO better isToggled handling
                    var link;
                    if (closest(e.target, 'a[href="#"], a[href=""]')
                        || (link = closest(e.target, 'a[href]')) && (
                            this.cls && !hasClass(this.target, this.cls.split(' ')[0])
                            || !isVisible(this.target)
                            || link.hash && matches(this.target, link.hash)
                        )
                    ) {
                        e.preventDefault();
                    }

                    this.toggle();
                }

            }

        ],

        update: {

            read: function() {
                return includes(this.mode, 'media') && this.media
                    ? {match: this.matchMedia}
                    : false;
            },

            write: function(ref) {
                var match = ref.match;


                var toggled = this.isToggled(this.target);
                if (match ? !toggled : toggled) {
                    this.toggle();
                }

            },

            events: ['resize']

        },

        methods: {

            toggle: function(type) {
                if (trigger(this.target, type || 'toggle', [this])) {
                    this.toggleElement(this.target);
                }
            }

        }

    };

    var coreComponents = /*#__PURE__*/Object.freeze({
        __proto__: null,
        Accordion: Accordion,
        Alert: alert,
        Cover: cover,
        Drop: drop,
        Dropdown: drop,
        FormCustom: formCustom,
        Gif: gif,
        Grid: grid,
        HeightMatch: heightMatch,
        HeightViewport: heightViewport,
        Icon: Icon,
        Img: img,
        Leader: leader,
        Margin: Margin,
        Modal: modal,
        Nav: nav,
        Navbar: navbar,
        Offcanvas: offcanvas,
        OverflowAuto: overflowAuto,
        Responsive: responsive,
        Scroll: scroll,
        Scrollspy: scrollspy,
        ScrollspyNav: scrollspyNav,
        Sticky: sticky,
        Svg: SVG,
        Switcher: Switcher,
        Tab: tab,
        Toggle: toggle,
        Video: Video,
        Close: Close,
        Spinner: Spinner,
        SlidenavNext: Slidenav,
        SlidenavPrevious: Slidenav,
        SearchIcon: Search,
        Marker: IconComponent,
        NavbarToggleIcon: IconComponent,
        OverlayIcon: IconComponent,
        PaginationNext: IconComponent,
        PaginationPrevious: IconComponent,
        Totop: IconComponent
    });

    var countdown = {

        mixins: [Class],

        props: {
            date: String,
            clsWrapper: String
        },

        data: {
            date: '',
            clsWrapper: '.uk-countdown-%unit%'
        },

        computed: {

            date: function(ref) {
                var date = ref.date;

                return Date.parse(date);
            },

            days: function(ref, $el) {
                var clsWrapper = ref.clsWrapper;

                return $(clsWrapper.replace('%unit%', 'days'), $el);
            },

            hours: function(ref, $el) {
                var clsWrapper = ref.clsWrapper;

                return $(clsWrapper.replace('%unit%', 'hours'), $el);
            },

            minutes: function(ref, $el) {
                var clsWrapper = ref.clsWrapper;

                return $(clsWrapper.replace('%unit%', 'minutes'), $el);
            },

            seconds: function(ref, $el) {
                var clsWrapper = ref.clsWrapper;

                return $(clsWrapper.replace('%unit%', 'seconds'), $el);
            },

            units: function() {
                var this$1 = this;

                return ['days', 'hours', 'minutes', 'seconds'].filter(function (unit) { return this$1[unit]; });
            }

        },

        connected: function() {
            this.start();
        },

        disconnected: function() {
            var this$1 = this;

            this.stop();
            this.units.forEach(function (unit) { return empty(this$1[unit]); });
        },

        events: [

            {

                name: 'visibilitychange',

                el: document,

                handler: function() {
                    if (document.hidden) {
                        this.stop();
                    } else {
                        this.start();
                    }
                }

            }

        ],

        update: {

            write: function() {
                var this$1 = this;


                var timespan = getTimeSpan(this.date);

                if (timespan.total <= 0) {

                    this.stop();

                    timespan.days
                        = timespan.hours
                        = timespan.minutes
                        = timespan.seconds
                        = 0;
                }

                this.units.forEach(function (unit) {

                    var digits = String(Math.floor(timespan[unit]));

                    digits = digits.length < 2 ? ("0" + digits) : digits;

                    var el = this$1[unit];
                    if (el.textContent !== digits) {
                        digits = digits.split('');

                        if (digits.length !== el.children.length) {
                            html(el, digits.map(function () { return '<span></span>'; }).join(''));
                        }

                        digits.forEach(function (digit, i) { return el.children[i].textContent = digit; });
                    }

                });

            }

        },

        methods: {

            start: function() {

                this.stop();

                if (this.date && this.units.length) {
                    this.$update();
                    this.timer = setInterval(this.$update, 1000);
                }

            },

            stop: function() {

                if (this.timer) {
                    clearInterval(this.timer);
                    this.timer = null;
                }

            }

        }

    };

    function getTimeSpan(date) {

        var total = date - Date.now();

        return {
            total: total,
            seconds: total / 1000 % 60,
            minutes: total / 1000 / 60 % 60,
            hours: total / 1000 / 60 / 60 % 24,
            days: total / 1000 / 60 / 60 / 24
        };
    }

    var targetClass = 'uk-animation-target';

    var Animate = {

        props: {
            animation: Number
        },

        data: {
            animation: 150
        },

        computed: {

            target: function() {
                return this.$el;
            }

        },

        methods: {

            animate: function(action) {
                var this$1 = this;


                addStyle();

                var children$1 = children(this.target);
                var propsFrom = children$1.map(function (el) { return getProps(el, true); });

                var oldHeight = height(this.target);
                var oldScrollY = window.pageYOffset;

                action();

                Transition.cancel(this.target);
                children$1.forEach(Transition.cancel);

                reset(this.target);
                this.$update(this.target, 'resize');
                fastdom.flush();

                var newHeight = height(this.target);

                children$1 = children$1.concat(children(this.target).filter(function (el) { return !includes(children$1, el); }));

                var propsTo = children$1.map(function (el, i) { return el.parentNode && i in propsFrom
                        ? propsFrom[i]
                        ? isVisible(el)
                            ? getPositionWithMargin(el)
                            : {opacity: 0}
                        : {opacity: isVisible(el) ? 1 : 0}
                        : false; }
                );

                propsFrom = propsTo.map(function (props, i) {
                    var from = children$1[i].parentNode === this$1.target
                        ? propsFrom[i] || getProps(children$1[i])
                        : false;

                    if (from) {
                        if (!props) {
                            delete from.opacity;
                        } else if (!('opacity' in props)) {
                            var opacity = from.opacity;

                            if (opacity % 1) {
                                props.opacity = 1;
                            } else {
                                delete from.opacity;
                            }
                        }
                    }

                    return from;
                });

                addClass(this.target, targetClass);
                children$1.forEach(function (el, i) { return propsFrom[i] && css(el, propsFrom[i]); });
                css(this.target, {height: oldHeight, display: 'block'});
                scrollTop(window, oldScrollY);

                return Promise.all(
                    children$1.map(function (el, i) { return ['top', 'left', 'height', 'width'].some(function (prop) { return propsFrom[i][prop] !== propsTo[i][prop]; }
                        ) && Transition.start(el, propsTo[i], this$1.animation, 'ease'); }
                    ).concat(oldHeight !== newHeight && Transition.start(this.target, {height: newHeight}, this.animation, 'ease'))
                ).then(function () {
                    children$1.forEach(function (el, i) { return css(el, {display: propsTo[i].opacity === 0 ? 'none' : '', zIndex: ''}); });
                    reset(this$1.target);
                    this$1.$update(this$1.target, 'resize');
                    fastdom.flush(); // needed for IE11
                }, noop);

            }
        }
    };

    function getProps(el, opacity) {

        var zIndex = css(el, 'zIndex');

        return isVisible(el)
            ? assign({
                display: '',
                opacity: opacity ? css(el, 'opacity') : '0',
                pointerEvents: 'none',
                position: 'absolute',
                zIndex: zIndex === 'auto' ? index(el) : zIndex
            }, getPositionWithMargin(el))
            : false;
    }

    function reset(el) {
        css(el.children, {
            height: '',
            left: '',
            opacity: '',
            pointerEvents: '',
            position: '',
            top: '',
            width: ''
        });
        removeClass(el, targetClass);
        css(el, {height: '', display: ''});
    }

    function getPositionWithMargin(el) {
        var ref = offset(el);
        var height = ref.height;
        var width = ref.width;
        var ref$1 = position(el);
        var top = ref$1.top;
        var left = ref$1.left;

        return {top: top, left: left, height: height, width: width};
    }

    var style;

    function addStyle() {
        if (style) {
            return;
        }
        style = append(document.head, '<style>').sheet;
        style.insertRule(
            ("." + targetClass + " > * {\n            margin-top: 0 !important;\n            transform: none !important;\n        }"), 0
        );
    }

    var filter$1 = {

        mixins: [Animate],

        args: 'target',

        props: {
            target: Boolean,
            selActive: Boolean
        },

        data: {
            target: null,
            selActive: false,
            attrItem: 'uk-filter-control',
            cls: 'uk-active',
            animation: 250
        },

        computed: {

            toggles: {

                get: function(ref, $el) {
                    var attrItem = ref.attrItem;

                    return $$(("[" + (this.attrItem) + "],[data-" + (this.attrItem) + "]"), $el);
                },

                watch: function() {
                    var this$1 = this;


                    this.updateState();

                    if (this.selActive !== false) {
                        var actives = $$(this.selActive, this.$el);
                        this.toggles.forEach(function (el) { return toggleClass(el, this$1.cls, includes(actives, el)); });
                    }

                },

                immediate: true

            },

            target: function(ref, $el) {
                var target = ref.target;

                return $(target, $el);
            },

            children: {

                get: function() {
                    return children(this.target);
                },

                watch: function(list, old) {
                    if (!isEqualList(list, old)) {
                        this.updateState();
                    }
                }
            }

        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return ("[" + (this.attrItem) + "],[data-" + (this.attrItem) + "]");
                },

                handler: function(e) {

                    e.preventDefault();
                    this.apply(e.current);

                }

            }

        ],

        methods: {

            apply: function(el) {
                this.setState(mergeState(el, this.attrItem, this.getState()));
            },

            getState: function() {
                var this$1 = this;

                return this.toggles
                    .filter(function (item) { return hasClass(item, this$1.cls); })
                    .reduce(function (state, el) { return mergeState(el, this$1.attrItem, state); }, {filter: {'': ''}, sort: []});
            },

            setState: function(state, animate) {
                var this$1 = this;
                if ( animate === void 0 ) animate = true;


                state = assign({filter: {'': ''}, sort: []}, state);

                trigger(this.$el, 'beforeFilter', [this, state]);

                var ref = this;
                var children = ref.children;

                this.toggles.forEach(function (el) { return toggleClass(el, this$1.cls, !!matchFilter(el, this$1.attrItem, state)); });

                var apply = function () {

                    var selector = getSelector(state);

                    children.forEach(function (el) { return css(el, 'display', selector && !matches(el, selector) ? 'none' : ''); });

                    var ref = state.sort;
                    var sort = ref[0];
                    var order = ref[1];

                    if (sort) {
                        var sorted = sortItems(children, sort, order);
                        if (!isEqual(sorted, children)) {
                            sorted.forEach(function (el) { return append(this$1.target, el); });
                        }
                    }

                };

                if (animate) {
                    this.animate(apply).then(function () { return trigger(this$1.$el, 'afterFilter', [this$1]); });
                } else {
                    apply();
                    trigger(this.$el, 'afterFilter', [this]);
                }

            },

            updateState: function() {
                var this$1 = this;

                fastdom.write(function () { return this$1.setState(this$1.getState(), false); });
            }

        }

    };

    function getFilter(el, attr) {
        return parseOptions(data(el, attr), ['filter']);
    }

    function mergeState(el, attr, state) {

        var filterBy = getFilter(el, attr);
        var filter = filterBy.filter;
        var group = filterBy.group;
        var sort = filterBy.sort;
        var order = filterBy.order; if ( order === void 0 ) order = 'asc';

        if (filter || isUndefined(sort)) {

            if (group) {

                if (filter) {
                    delete state.filter[''];
                    state.filter[group] = filter;
                } else {
                    delete state.filter[group];

                    if (isEmpty(state.filter) || '' in state.filter) {
                        state.filter = {'': filter || ''};
                    }

                }

            } else {
                state.filter = {'': filter || ''};
            }

        }

        if (!isUndefined(sort)) {
            state.sort = [sort, order];
        }

        return state;
    }

    function matchFilter(el, attr, ref) {
        var stateFilter = ref.filter; if ( stateFilter === void 0 ) stateFilter = {'': ''};
        var ref_sort = ref.sort;
        var stateSort = ref_sort[0];
        var stateOrder = ref_sort[1];


        var ref$1 = getFilter(el, attr);
        var filter = ref$1.filter; if ( filter === void 0 ) filter = '';
        var group = ref$1.group; if ( group === void 0 ) group = '';
        var sort = ref$1.sort;
        var order = ref$1.order; if ( order === void 0 ) order = 'asc';

        return isUndefined(sort)
            ? group in stateFilter && filter === stateFilter[group]
                || !filter && group && !(group in stateFilter) && !stateFilter['']
            : stateSort === sort && stateOrder === order;
    }

    function isEqualList(listA, listB) {
        return listA.length === listB.length
            && listA.every(function (el) { return ~listB.indexOf(el); });
    }

    function getSelector(ref) {
        var filter = ref.filter;

        var selector = '';
        each(filter, function (value) { return selector += value || ''; });
        return selector;
    }

    function sortItems(nodes, sort, order) {
        return assign([], nodes).sort(function (a, b) { return data(a, sort).localeCompare(data(b, sort), undefined, {numeric: true}) * (order === 'asc' || -1); });
    }

    var Animations = {

        slide: {

            show: function(dir) {
                return [
                    {transform: translate(dir * -100)},
                    {transform: translate()}
                ];
            },

            percent: function(current) {
                return translated(current);
            },

            translate: function(percent, dir) {
                return [
                    {transform: translate(dir * -100 * percent)},
                    {transform: translate(dir * 100 * (1 - percent))}
                ];
            }

        }

    };

    function translated(el) {
        return Math.abs(css(el, 'transform').split(',')[4] / el.offsetWidth) || 0;
    }

    function translate(value, unit) {
        if ( value === void 0 ) value = 0;
        if ( unit === void 0 ) unit = '%';

        value += value ? unit : '';
        return isIE ? ("translateX(" + value + ")") : ("translate3d(" + value + ", 0, 0)"); // currently not translate3d in IE, translate3d within translate3d does not work while transitioning
    }

    function scale3d(value) {
        return ("scale3d(" + value + ", " + value + ", 1)");
    }

    var Animations$1 = assign({}, Animations, {

        fade: {

            show: function() {
                return [
                    {opacity: 0},
                    {opacity: 1}
                ];
            },

            percent: function(current) {
                return 1 - css(current, 'opacity');
            },

            translate: function(percent) {
                return [
                    {opacity: 1 - percent},
                    {opacity: percent}
                ];
            }

        },

        scale: {

            show: function() {
                return [
                    {opacity: 0, transform: scale3d(1 - .2)},
                    {opacity: 1, transform: scale3d(1)}
                ];
            },

            percent: function(current) {
                return 1 - css(current, 'opacity');
            },

            translate: function(percent) {
                return [
                    {opacity: 1 - percent, transform: scale3d(1 - .2 * percent)},
                    {opacity: percent, transform: scale3d(1 - .2 + .2 * percent)}
                ];
            }

        }

    });

    function Transitioner(prev, next, dir, ref) {
        var animation = ref.animation;
        var easing = ref.easing;


        var percent = animation.percent;
        var translate = animation.translate;
        var show = animation.show; if ( show === void 0 ) show = noop;
        var props = show(dir);
        var deferred = new Deferred();

        return {

            dir: dir,

            show: function(duration, percent, linear) {
                var this$1 = this;
                if ( percent === void 0 ) percent = 0;


                var timing = linear ? 'linear' : easing;
                duration -= Math.round(duration * clamp(percent, -1, 1));

                this.translate(percent);

                triggerUpdate(next, 'itemin', {percent: percent, duration: duration, timing: timing, dir: dir});
                triggerUpdate(prev, 'itemout', {percent: 1 - percent, duration: duration, timing: timing, dir: dir});

                Promise.all([
                    Transition.start(next, props[1], duration, timing),
                    Transition.start(prev, props[0], duration, timing)
                ]).then(function () {
                    this$1.reset();
                    deferred.resolve();
                }, noop);

                return deferred.promise;
            },

            stop: function() {
                return Transition.stop([next, prev]);
            },

            cancel: function() {
                Transition.cancel([next, prev]);
            },

            reset: function() {
                for (var prop in props[0]) {
                    css([next, prev], prop, '');
                }
            },

            forward: function(duration, percent) {
                if ( percent === void 0 ) percent = this.percent();

                Transition.cancel([next, prev]);
                return this.show(duration, percent, true);

            },

            translate: function(percent) {

                this.reset();

                var props = translate(percent, dir);
                css(next, props[1]);
                css(prev, props[0]);
                triggerUpdate(next, 'itemtranslatein', {percent: percent, dir: dir});
                triggerUpdate(prev, 'itemtranslateout', {percent: 1 - percent, dir: dir});

            },

            percent: function() {
                return percent(prev || next, next, dir);
            },

            getDistance: function() {
                return prev && prev.offsetWidth;
            }

        };

    }

    function triggerUpdate(el, type, data) {
        trigger(el, createEvent(type, false, false, data));
    }

    var SliderAutoplay = {

        props: {
            autoplay: Boolean,
            autoplayInterval: Number,
            pauseOnHover: Boolean
        },

        data: {
            autoplay: false,
            autoplayInterval: 7000,
            pauseOnHover: true
        },

        connected: function() {
            this.autoplay && this.startAutoplay();
        },

        disconnected: function() {
            this.stopAutoplay();
        },

        update: function() {
            attr(this.slides, 'tabindex', '-1');
        },

        events: [

            {

                name: 'visibilitychange',

                el: document,

                filter: function() {
                    return this.autoplay;
                },

                handler: function() {
                    if (document.hidden) {
                        this.stopAutoplay();
                    } else {
                        this.startAutoplay();
                    }
                }

            }

        ],

        methods: {

            startAutoplay: function() {
                var this$1 = this;


                this.stopAutoplay();

                this.interval = setInterval(
                    function () { return (!this$1.draggable || !$(':focus', this$1.$el))
                        && (!this$1.pauseOnHover || !matches(this$1.$el, ':hover'))
                        && !this$1.stack.length
                        && this$1.show('next'); },
                    this.autoplayInterval
                );

            },

            stopAutoplay: function() {
                this.interval && clearInterval(this.interval);
            }

        }

    };

    var SliderDrag = {

        props: {
            draggable: Boolean
        },

        data: {
            draggable: true,
            threshold: 10
        },

        created: function() {
            var this$1 = this;


            ['start', 'move', 'end'].forEach(function (key) {

                var fn = this$1[key];
                this$1[key] = function (e) {

                    var pos = getEventPos(e).x * (isRtl ? -1 : 1);

                    this$1.prevPos = pos !== this$1.pos ? this$1.pos : this$1.prevPos;
                    this$1.pos = pos;

                    fn(e);
                };

            });

        },

        events: [

            {

                name: pointerDown,

                delegate: function() {
                    return this.selSlides;
                },

                handler: function(e) {

                    if (!this.draggable
                        || !isTouch(e) && hasTextNodesOnly(e.target)
                        || closest(e.target, selInput)
                        || e.button > 0
                        || this.length < 2
                    ) {
                        return;
                    }

                    this.start(e);
                }

            },

            {

                // Workaround for iOS 11 bug: https://bugs.webkit.org/show_bug.cgi?id=184250

                name: 'touchmove',
                passive: false,
                handler: 'move',
                filter: function() {
                    return pointerMove === 'touchmove';
                },
                delegate: function() {
                    return this.selSlides;
                }

            },

            {
                name: 'dragstart',

                handler: function(e) {
                    e.preventDefault();
                }
            }

        ],

        methods: {

            start: function() {
                var this$1 = this;


                this.drag = this.pos;

                if (this._transitioner) {

                    this.percent = this._transitioner.percent();
                    this.drag += this._transitioner.getDistance() * this.percent * this.dir;

                    this._transitioner.cancel();
                    this._transitioner.translate(this.percent);

                    this.dragging = true;

                    this.stack = [];

                } else {
                    this.prevIndex = this.index;
                }

                // See above workaround notice
                var off = pointerMove !== 'touchmove'
                    ? on(document, pointerMove, this.move, {passive: false})
                    : noop;
                this.unbindMove = function () {
                    off();
                    this$1.unbindMove = null;
                };
                on(window, 'scroll', this.unbindMove);
                on(window.visualViewport, 'resize', this.unbindMove);
                on(document, (pointerUp + " " + pointerCancel), this.end, true);

                css(this.list, 'userSelect', 'none');

            },

            move: function(e) {
                var this$1 = this;


                // See above workaround notice
                if (!this.unbindMove) {
                    return;
                }

                var distance = this.pos - this.drag;

                if (distance === 0 || this.prevPos === this.pos || !this.dragging && Math.abs(distance) < this.threshold) {
                    return;
                }

                css(this.list, 'pointerEvents', 'none');

                e.cancelable && e.preventDefault();

                this.dragging = true;
                this.dir = (distance < 0 ? 1 : -1);

                var ref = this;
                var slides = ref.slides;
                var ref$1 = this;
                var prevIndex = ref$1.prevIndex;
                var dis = Math.abs(distance);
                var nextIndex = this.getIndex(prevIndex + this.dir, prevIndex);
                var width = this._getDistance(prevIndex, nextIndex) || slides[prevIndex].offsetWidth;

                while (nextIndex !== prevIndex && dis > width) {

                    this.drag -= width * this.dir;

                    prevIndex = nextIndex;
                    dis -= width;
                    nextIndex = this.getIndex(prevIndex + this.dir, prevIndex);
                    width = this._getDistance(prevIndex, nextIndex) || slides[prevIndex].offsetWidth;

                }

                this.percent = dis / width;

                var prev = slides[prevIndex];
                var next = slides[nextIndex];
                var changed = this.index !== nextIndex;
                var edge = prevIndex === nextIndex;

                var itemShown;

                [this.index, this.prevIndex].filter(function (i) { return !includes([nextIndex, prevIndex], i); }).forEach(function (i) {
                    trigger(slides[i], 'itemhidden', [this$1]);

                    if (edge) {
                        itemShown = true;
                        this$1.prevIndex = prevIndex;
                    }

                });

                if (this.index === prevIndex && this.prevIndex !== prevIndex || itemShown) {
                    trigger(slides[this.index], 'itemshown', [this]);
                }

                if (changed) {
                    this.prevIndex = prevIndex;
                    this.index = nextIndex;

                    !edge && trigger(prev, 'beforeitemhide', [this]);
                    trigger(next, 'beforeitemshow', [this]);
                }

                this._transitioner = this._translate(Math.abs(this.percent), prev, !edge && next);

                if (changed) {
                    !edge && trigger(prev, 'itemhide', [this]);
                    trigger(next, 'itemshow', [this]);
                }

            },

            end: function() {

                off(window, 'scroll', this.unbindMove);
                off(window.visualViewport, 'resize', this.unbindMove);
                this.unbindMove && this.unbindMove();
                off(document, pointerUp, this.end, true);

                if (this.dragging) {

                    this.dragging = null;

                    if (this.index === this.prevIndex) {
                        this.percent = 1 - this.percent;
                        this.dir *= -1;
                        this._show(false, this.index, true);
                        this._transitioner = null;
                    } else {

                        var dirChange = (isRtl ? this.dir * (isRtl ? 1 : -1) : this.dir) < 0 === this.prevPos > this.pos;
                        this.index = dirChange ? this.index : this.prevIndex;

                        if (dirChange) {
                            this.percent = 1 - this.percent;
                        }

                        this.show(this.dir > 0 && !dirChange || this.dir < 0 && dirChange ? 'next' : 'previous', true);
                    }

                }

                css(this.list, {userSelect: '', pointerEvents: ''});

                this.drag
                    = this.percent
                    = null;

            }

        }

    };

    function hasTextNodesOnly(el) {
        return !el.children.length && el.childNodes.length;
    }

    var SliderNav = {

        data: {
            selNav: false
        },

        computed: {

            nav: function(ref, $el) {
                var selNav = ref.selNav;

                return $(selNav, $el);
            },

            selNavItem: function(ref) {
                var attrItem = ref.attrItem;

                return ("[" + attrItem + "],[data-" + attrItem + "]");
            },

            navItems: function(_, $el) {
                return $$(this.selNavItem, $el);
            }

        },

        update: {

            write: function() {
                var this$1 = this;


                if (this.nav && this.length !== this.nav.children.length) {
                    html(this.nav, this.slides.map(function (_, i) { return ("<li " + (this$1.attrItem) + "=\"" + i + "\"><a href></a></li>"); }).join(''));
                }

                toggleClass($$(this.selNavItem, this.$el).concat(this.nav), 'uk-hidden', !this.maxIndex);

                this.updateNav();

            },

            events: ['resize']

        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return this.selNavItem;
                },

                handler: function(e) {
                    e.preventDefault();
                    this.show(data(e.current, this.attrItem));
                }

            },

            {

                name: 'itemshow',
                handler: 'updateNav'

            }

        ],

        methods: {

            updateNav: function() {
                var this$1 = this;


                var i = this.getValidIndex();
                this.navItems.forEach(function (el) {

                    var cmd = data(el, this$1.attrItem);

                    toggleClass(el, this$1.clsActive, toNumber(cmd) === i);
                    toggleClass(el, 'uk-invisible', this$1.finite && (cmd === 'previous' && i === 0 || cmd === 'next' && i >= this$1.maxIndex));
                });

            }

        }

    };

    var Slider = {

        mixins: [SliderAutoplay, SliderDrag, SliderNav],

        props: {
            clsActivated: Boolean,
            easing: String,
            index: Number,
            finite: Boolean,
            velocity: Number,
            selSlides: String
        },

        data: function () { return ({
            easing: 'ease',
            finite: false,
            velocity: 1,
            index: 0,
            prevIndex: -1,
            stack: [],
            percent: 0,
            clsActive: 'uk-active',
            clsActivated: false,
            Transitioner: false,
            transitionOptions: {}
        }); },

        connected: function() {
            this.prevIndex = -1;
            this.index = this.getValidIndex(this.index);
            this.stack = [];
        },

        disconnected: function() {
            removeClass(this.slides, this.clsActive);
        },

        computed: {

            duration: function(ref, $el) {
                var velocity = ref.velocity;

                return speedUp($el.offsetWidth / velocity);
            },

            list: function(ref, $el) {
                var selList = ref.selList;

                return $(selList, $el);
            },

            maxIndex: function() {
                return this.length - 1;
            },

            selSlides: function(ref) {
                var selList = ref.selList;
                var selSlides = ref.selSlides;

                return (selList + " " + (selSlides || '> *'));
            },

            slides: {

                get: function() {
                    return $$(this.selSlides, this.$el);
                },

                watch: function() {
                    this.$reset();
                }

            },

            length: function() {
                return this.slides.length;
            }

        },

        events: {

            itemshown: function() {
                this.$update(this.list);
            }

        },

        methods: {

            show: function(index, force) {
                var this$1 = this;
                if ( force === void 0 ) force = false;


                if (this.dragging || !this.length) {
                    return;
                }

                var ref = this;
                var stack = ref.stack;
                var queueIndex = force ? 0 : stack.length;
                var reset = function () {
                    stack.splice(queueIndex, 1);

                    if (stack.length) {
                        this$1.show(stack.shift(), true);
                    }
                };

                stack[force ? 'unshift' : 'push'](index);

                if (!force && stack.length > 1) {

                    if (stack.length === 2) {
                        this._transitioner.forward(Math.min(this.duration, 200));
                    }

                    return;
                }

                var prevIndex = this.getIndex(this.index);
                var prev = hasClass(this.slides, this.clsActive) && this.slides[prevIndex];
                var nextIndex = this.getIndex(index, this.index);
                var next = this.slides[nextIndex];

                if (prev === next) {
                    reset();
                    return;
                }

                this.dir = getDirection(index, prevIndex);
                this.prevIndex = prevIndex;
                this.index = nextIndex;

                prev && trigger(prev, 'beforeitemhide', [this]);
                if (!trigger(next, 'beforeitemshow', [this, prev])) {
                    this.index = this.prevIndex;
                    reset();
                    return;
                }

                var promise = this._show(prev, next, force).then(function () {

                    prev && trigger(prev, 'itemhidden', [this$1]);
                    trigger(next, 'itemshown', [this$1]);

                    return new Promise(function (resolve) {
                        fastdom.write(function () {
                            stack.shift();
                            if (stack.length) {
                                this$1.show(stack.shift(), true);
                            } else {
                                this$1._transitioner = null;
                            }
                            resolve();
                        });
                    });

                });

                prev && trigger(prev, 'itemhide', [this]);
                trigger(next, 'itemshow', [this]);

                return promise;

            },

            getIndex: function(index, prev) {
                if ( index === void 0 ) index = this.index;
                if ( prev === void 0 ) prev = this.index;

                return clamp(getIndex(index, this.slides, prev, this.finite), 0, this.maxIndex);
            },

            getValidIndex: function(index, prevIndex) {
                if ( index === void 0 ) index = this.index;
                if ( prevIndex === void 0 ) prevIndex = this.prevIndex;

                return this.getIndex(index, prevIndex);
            },

            _show: function(prev, next, force) {

                this._transitioner = this._getTransitioner(
                    prev,
                    next,
                    this.dir,
                    assign({
                        easing: force
                            ? next.offsetWidth < 600
                                ? 'cubic-bezier(0.25, 0.46, 0.45, 0.94)' /* easeOutQuad */
                                : 'cubic-bezier(0.165, 0.84, 0.44, 1)' /* easeOutQuart */
                            : this.easing
                    }, this.transitionOptions)
                );

                if (!force && !prev) {
                    this._translate(1);
                    return Promise.resolve();
                }

                var ref = this.stack;
                var length = ref.length;
                return this._transitioner[length > 1 ? 'forward' : 'show'](length > 1 ? Math.min(this.duration, 75 + 75 / (length - 1)) : this.duration, this.percent);

            },

            _getDistance: function(prev, next) {
                return this._getTransitioner(prev, prev !== next && next).getDistance();
            },

            _translate: function(percent, prev, next) {
                if ( prev === void 0 ) prev = this.prevIndex;
                if ( next === void 0 ) next = this.index;

                var transitioner = this._getTransitioner(prev !== next ? prev : false, next);
                transitioner.translate(percent);
                return transitioner;
            },

            _getTransitioner: function(prev, next, dir, options) {
                if ( prev === void 0 ) prev = this.prevIndex;
                if ( next === void 0 ) next = this.index;
                if ( dir === void 0 ) dir = this.dir || 1;
                if ( options === void 0 ) options = this.transitionOptions;

                return new this.Transitioner(
                    isNumber(prev) ? this.slides[prev] : prev,
                    isNumber(next) ? this.slides[next] : next,
                    dir * (isRtl ? -1 : 1),
                    options
                );
            }

        }

    };

    function getDirection(index, prevIndex) {
        return index === 'next'
            ? 1
            : index === 'previous'
                ? -1
                : index < prevIndex
                    ? -1
                    : 1;
    }

    function speedUp(x) {
        return .5 * x + 300; // parabola through (400,500; 600,600; 1800,1200)
    }

    var Slideshow = {

        mixins: [Slider],

        props: {
            animation: String
        },

        data: {
            animation: 'slide',
            clsActivated: 'uk-transition-active',
            Animations: Animations,
            Transitioner: Transitioner
        },

        computed: {

            animation: function(ref) {
                var animation = ref.animation;
                var Animations = ref.Animations;

                return assign(animation in Animations ? Animations[animation] : Animations.slide, {name: animation});
            },

            transitionOptions: function() {
                return {animation: this.animation};
            }

        },

        events: {

            'itemshow itemhide itemshown itemhidden': function(ref) {
                var target = ref.target;

                this.$update(target);
            },

            beforeitemshow: function(ref) {
                var target = ref.target;

                addClass(target, this.clsActive);
            },

            itemshown: function(ref) {
                var target = ref.target;

                addClass(target, this.clsActivated);
            },

            itemhidden: function(ref) {
                var target = ref.target;

                removeClass(target, this.clsActive, this.clsActivated);
            }

        }

    };

    var LightboxPanel = {

        mixins: [Container, Modal, Togglable, Slideshow],

        functional: true,

        props: {
            delayControls: Number,
            preload: Number,
            videoAutoplay: Boolean,
            template: String
        },

        data: function () { return ({
            preload: 1,
            videoAutoplay: false,
            delayControls: 3000,
            items: [],
            cls: 'uk-open',
            clsPage: 'uk-lightbox-page',
            selList: '.uk-lightbox-items',
            attrItem: 'uk-lightbox-item',
            selClose: '.uk-close-large',
            selCaption: '.uk-lightbox-caption',
            pauseOnHover: false,
            velocity: 2,
            Animations: Animations$1,
            template: "<div class=\"uk-lightbox uk-overflow-hidden\"> <ul class=\"uk-lightbox-items\"></ul> <div class=\"uk-lightbox-toolbar uk-position-top uk-text-right uk-transition-slide-top uk-transition-opaque\"> <button class=\"uk-lightbox-toolbar-icon uk-close-large\" type=\"button\" uk-close></button> </div> <a class=\"uk-lightbox-button uk-position-center-left uk-position-medium uk-transition-fade\" href uk-slidenav-previous uk-lightbox-item=\"previous\"></a> <a class=\"uk-lightbox-button uk-position-center-right uk-position-medium uk-transition-fade\" href uk-slidenav-next uk-lightbox-item=\"next\"></a> <div class=\"uk-lightbox-toolbar uk-lightbox-caption uk-position-bottom uk-text-center uk-transition-slide-bottom uk-transition-opaque\"></div> </div>"
        }); },

        created: function() {

            var $el = $(this.template);
            var list = $(this.selList, $el);
            this.items.forEach(function () { return append(list, '<li>'); });

            this.$mount(append(this.container, $el));

        },

        computed: {

            caption: function(ref, $el) {
                var selCaption = ref.selCaption;

                return $('.uk-lightbox-caption', $el);
            }

        },

        events: [

            {

                name: (pointerMove + " " + pointerDown + " keydown"),

                handler: 'showControls'

            },

            {

                name: 'click',

                self: true,

                delegate: function() {
                    return this.selSlides;
                },

                handler: function(e) {

                    if (e.defaultPrevented) {
                        return;
                    }

                    this.hide();
                }

            },

            {

                name: 'shown',

                self: true,

                handler: function() {
                    this.showControls();
                }

            },

            {

                name: 'hide',

                self: true,

                handler: function() {

                    this.hideControls();

                    removeClass(this.slides, this.clsActive);
                    Transition.stop(this.slides);

                }
            },

            {

                name: 'hidden',

                self: true,

                handler: function() {
                    this.$destroy(true);
                }

            },

            {

                name: 'keyup',

                el: document,

                handler: function(e) {

                    if (!this.isToggled(this.$el) || !this.draggable) {
                        return;
                    }

                    switch (e.keyCode) {
                        case 37:
                            this.show('previous');
                            break;
                        case 39:
                            this.show('next');
                            break;
                    }
                }
            },

            {

                name: 'beforeitemshow',

                handler: function(e) {

                    if (this.isToggled()) {
                        return;
                    }

                    this.draggable = false;

                    e.preventDefault();

                    this.toggleElement(this.$el, true, false);

                    this.animation = Animations$1['scale'];
                    removeClass(e.target, this.clsActive);
                    this.stack.splice(1, 0, this.index);

                }

            },

            {

                name: 'itemshow',

                handler: function() {

                    html(this.caption, this.getItem().caption || '');

                    for (var j = -this.preload; j <= this.preload; j++) {
                        this.loadItem(this.index + j);
                    }

                }

            },

            {

                name: 'itemshown',

                handler: function() {
                    this.draggable = this.$props.draggable;
                }

            },

            {

                name: 'itemload',

                handler: function(_, item) {
                    var this$1 = this;


                    var src = item.source;
                    var type = item.type;
                    var alt = item.alt; if ( alt === void 0 ) alt = '';
                    var poster = item.poster;
                    var attrs = item.attrs; if ( attrs === void 0 ) attrs = {};

                    this.setItem(item, '<span uk-spinner></span>');

                    if (!src) {
                        return;
                    }

                    var matches;
                    var iframeAttrs = {
                        frameborder: '0',
                        allow: 'autoplay',
                        allowfullscreen: '',
                        style: 'max-width: 100%; box-sizing: border-box;',
                        'uk-responsive': '',
                        'uk-video': ("" + (this.videoAutoplay))
                    };

                    // Image
                    if (type === 'image' || src.match(/\.(jpe?g|png|gif|svg|webp)($|\?)/i)) {

                        getImage(src, attrs.srcset, attrs.size).then(
                            function (ref) {
                                var width = ref.width;
                                var height = ref.height;

                                return this$1.setItem(item, createEl('img', assign({src: src, width: width, height: height, alt: alt}, attrs)));
                        },
                            function () { return this$1.setError(item); }
                        );

                    // Video
                    } else if (type === 'video' || src.match(/\.(mp4|webm|ogv)($|\?)/i)) {

                        var video = createEl('video', assign({
                            src: src,
                            poster: poster,
                            controls: '',
                            playsinline: '',
                            'uk-video': ("" + (this.videoAutoplay))
                        }, attrs));

                        on(video, 'loadedmetadata', function () {
                            attr(video, {width: video.videoWidth, height: video.videoHeight});
                            this$1.setItem(item, video);
                        });
                        on(video, 'error', function () { return this$1.setError(item); });

                    // Iframe
                    } else if (type === 'iframe' || src.match(/\.(html|php)($|\?)/i)) {

                        this.setItem(item, createEl('iframe', assign({
                            src: src,
                            frameborder: '0',
                            allowfullscreen: '',
                            class: 'uk-lightbox-iframe'
                        }, attrs)));

                    // YouTube
                    } else if ((matches = src.match(/\/\/(?:.*?youtube(-nocookie)?\..*?[?&]v=|youtu\.be\/)([\w-]{11})[&?]?(.*)?/))) {

                        this.setItem(item, createEl('iframe', assign({
                            src: ("https://www.youtube" + (matches[1] || '') + ".com/embed/" + (matches[2]) + (matches[3] ? ("?" + (matches[3])) : '')),
                            width: 1920,
                            height: 1080,
                        }, iframeAttrs, attrs)));

                    // Vimeo
                    } else if ((matches = src.match(/\/\/.*?vimeo\.[a-z]+\/(\d+)[&?]?(.*)?/))) {

                        ajax(("https://vimeo.com/api/oembed.json?maxwidth=1920&url=" + (encodeURI(src))), {
                            responseType: 'json',
                            withCredentials: false
                        }).then(
                            function (ref) {
                                var ref_response = ref.response;
                                var height = ref_response.height;
                                var width = ref_response.width;

                                return this$1.setItem(item, createEl('iframe', assign({
                                src: ("https://player.vimeo.com/video/" + (matches[1]) + (matches[2] ? ("?" + (matches[2])) : '')),
                                width: width,
                                height: height
                            }, iframeAttrs, attrs)));
                        },
                            function () { return this$1.setError(item); }
                        );

                    }

                }

            }

        ],

        methods: {

            loadItem: function(index) {
                if ( index === void 0 ) index = this.index;


                var item = this.getItem(index);

                if (!this.getSlide(item).childElementCount) {
                    trigger(this.$el, 'itemload', [item]);
                }
            },

            getItem: function(index) {
                if ( index === void 0 ) index = this.index;

                return this.items[getIndex(index, this.slides)];
            },

            setItem: function(item, content) {
                trigger(this.$el, 'itemloaded', [this, html(this.getSlide(item), content) ]);
            },

            getSlide: function(item) {
                return this.slides[this.items.indexOf(item)];
            },

            setError: function(item) {
                this.setItem(item, '<span uk-icon="icon: bolt; ratio: 2"></span>');
            },

            showControls: function() {

                clearTimeout(this.controlsTimer);
                this.controlsTimer = setTimeout(this.hideControls, this.delayControls);

                addClass(this.$el, 'uk-active', 'uk-transition-active');

            },

            hideControls: function() {
                removeClass(this.$el, 'uk-active', 'uk-transition-active');
            }

        }

    };

    function createEl(tag, attrs) {
        var el = fragment(("<" + tag + ">"));
        attr(el, attrs);
        return el;
    }

    var lightbox = {

        install: install$2,

        props: {toggle: String},

        data: {toggle: 'a'},

        computed: {

            toggles: {

                get: function(ref, $el) {
                    var toggle = ref.toggle;

                    return $$(toggle, $el);
                },

                watch: function() {
                    this.hide();
                }

            }

        },

        disconnected: function() {
            this.hide();
        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return ((this.toggle) + ":not(.uk-disabled)");
                },

                handler: function(e) {
                    e.preventDefault();
                    this.show(e.current);
                }

            }

        ],

        methods: {

            show: function(index) {
                var this$1 = this;


                var items = uniqueBy(this.toggles.map(toItem), 'source');

                if (isElement(index)) {
                    var ref = toItem(index);
                    var source = ref.source;
                    index = findIndex(items, function (ref) {
                        var src = ref.source;

                        return source === src;
                    });
                }

                this.panel = this.panel || this.$create('lightboxPanel', assign({}, this.$props, {items: items}));

                on(this.panel.$el, 'hidden', function () { return this$1.panel = false; });

                return this.panel.show(index);

            },

            hide: function() {

                return this.panel && this.panel.hide();

            }

        }

    };

    function install$2(UIkit, Lightbox) {

        if (!UIkit.lightboxPanel) {
            UIkit.component('lightboxPanel', LightboxPanel);
        }

        assign(
            Lightbox.props,
            UIkit.component('lightboxPanel').options.props
        );

    }

    function toItem(el) {

        var item = {};

        ['href', 'caption', 'type', 'poster', 'alt', 'attrs'].forEach(function (attr) {
            item[attr === 'href' ? 'source' : attr] = data(el, attr);
        });

        item.attrs = parseOptions(item.attrs);

        return item;
    }

    var obj;

    var notification = {

        functional: true,

        args: ['message', 'status'],

        data: {
            message: '',
            status: '',
            timeout: 5000,
            group: null,
            pos: 'top-center',
            clsContainer: 'uk-notification',
            clsClose: 'uk-notification-close',
            clsMsg: 'uk-notification-message'
        },

        install: install$3,

        computed: {

            marginProp: function(ref) {
                var pos = ref.pos;

                return ("margin" + (startsWith(pos, 'top') ? 'Top' : 'Bottom'));
            },

            startProps: function() {
                var obj;

                return ( obj = {opacity: 0}, obj[this.marginProp] = -this.$el.offsetHeight, obj );
            }

        },

        created: function() {

            var container = $(("." + (this.clsContainer) + "-" + (this.pos)), this.$container)
                || append(this.$container, ("<div class=\"" + (this.clsContainer) + " " + (this.clsContainer) + "-" + (this.pos) + "\" style=\"display: block\"></div>"));

            this.$mount(append(container,
                ("<div class=\"" + (this.clsMsg) + (this.status ? (" " + (this.clsMsg) + "-" + (this.status)) : '') + "\"> <a href class=\"" + (this.clsClose) + "\" data-uk-close></a> <div>" + (this.message) + "</div> </div>")
            ));

        },

        connected: function() {
            var this$1 = this;
            var obj;


            var margin = toFloat(css(this.$el, this.marginProp));
            Transition.start(
                css(this.$el, this.startProps),
                ( obj = {opacity: 1}, obj[this.marginProp] = margin, obj )
            ).then(function () {
                if (this$1.timeout) {
                    this$1.timer = setTimeout(this$1.close, this$1.timeout);
                }
            });

        },

        events: ( obj = {

            click: function(e) {
                if (closest(e.target, 'a[href="#"],a[href=""]')) {
                    e.preventDefault();
                }
                this.close();
            }

        }, obj[pointerEnter] = function () {
                if (this.timer) {
                    clearTimeout(this.timer);
                }
            }, obj[pointerLeave] = function () {
                if (this.timeout) {
                    this.timer = setTimeout(this.close, this.timeout);
                }
            }, obj ),

        methods: {

            close: function(immediate) {
                var this$1 = this;


                var removeFn = function () {

                    var container = this$1.$el.parentNode;

                    trigger(this$1.$el, 'close', [this$1]);
                    remove(this$1.$el);

                    if (container && !container.hasChildNodes()) {
                        remove(container);
                    }

                };

                if (this.timer) {
                    clearTimeout(this.timer);
                }

                if (immediate) {
                    removeFn();
                } else {
                    Transition.start(this.$el, this.startProps).then(removeFn);
                }
            }

        }

    };

    function install$3(UIkit) {
        UIkit.notification.closeAll = function (group, immediate) {
            apply(document.body, function (el) {
                var notification = UIkit.getComponent(el, 'notification');
                if (notification && (!group || group === notification.group)) {
                    notification.close(immediate);
                }
            });
        };
    }

    var props = ['x', 'y', 'bgx', 'bgy', 'rotate', 'scale', 'color', 'backgroundColor', 'borderColor', 'opacity', 'blur', 'hue', 'grayscale', 'invert', 'saturate', 'sepia', 'fopacity', 'stroke'];

    var Parallax = {

        mixins: [Media],

        props: props.reduce(function (props, prop) {
            props[prop] = 'list';
            return props;
        }, {}),

        data: props.reduce(function (data, prop) {
            data[prop] = undefined;
            return data;
        }, {}),

        computed: {

            props: function(properties, $el) {
                var this$1 = this;


                return props.reduce(function (props, prop) {

                    if (isUndefined(properties[prop])) {
                        return props;
                    }

                    var isColor = prop.match(/color/i);
                    var isCssProp = isColor || prop === 'opacity';

                    var pos, bgPos, diff;
                    var steps = properties[prop].slice(0);

                    if (isCssProp) {
                        css($el, prop, '');
                    }

                    if (steps.length < 2) {
                        steps.unshift((prop === 'scale'
                            ? 1
                            : isCssProp
                                ? css($el, prop)
                                : 0) || 0);
                    }

                    var unit = getUnit(steps);

                    if (isColor) {

                        var ref = $el.style;
                        var color = ref.color;
                        steps = steps.map(function (step) { return parseColor($el, step); });
                        $el.style.color = color;

                    } else if (startsWith(prop, 'bg')) {

                        var attr = prop === 'bgy' ? 'height' : 'width';
                        steps = steps.map(function (step) { return toPx(step, attr, this$1.$el); });

                        css($el, ("background-position-" + (prop[2])), '');
                        bgPos = css($el, 'backgroundPosition').split(' ')[prop[2] === 'x' ? 0 : 1]; // IE 11 can't read background-position-[x|y]

                        if (this$1.covers) {

                            var min = Math.min.apply(Math, steps);
                            var max = Math.max.apply(Math, steps);
                            var down = steps.indexOf(min) < steps.indexOf(max);

                            diff = max - min;

                            steps = steps.map(function (step) { return step - (down ? min : max); });
                            pos = (down ? -diff : 0) + "px";

                        } else {

                            pos = bgPos;

                        }

                    } else {

                        steps = steps.map(toFloat);

                    }

                    if (prop === 'stroke') {

                        if (!steps.some(function (step) { return step; })) {
                            return props;
                        }

                        var length = getMaxPathLength(this$1.$el);
                        css($el, 'strokeDasharray', length);

                        if (unit === '%') {
                            steps = steps.map(function (step) { return step * length / 100; });
                        }

                        steps = steps.reverse();

                        prop = 'strokeDashoffset';
                    }

                    props[prop] = {steps: steps, unit: unit, pos: pos, bgPos: bgPos, diff: diff};

                    return props;

                }, {});

            },

            bgProps: function() {
                var this$1 = this;

                return ['bgx', 'bgy'].filter(function (bg) { return bg in this$1.props; });
            },

            covers: function(_, $el) {
                return covers($el);
            }

        },

        disconnected: function() {
            delete this._image;
        },

        update: {

            read: function(data) {
                var this$1 = this;


                data.active = this.matchMedia;

                if (!data.active) {
                    return;
                }

                if (!data.image && this.covers && this.bgProps.length) {
                    var src = css(this.$el, 'backgroundImage').replace(/^none|url\(["']?(.+?)["']?\)$/, '$1');

                    if (src) {
                        var img = new Image();
                        img.src = src;
                        data.image = img;

                        if (!img.naturalWidth) {
                            img.onload = function () { return this$1.$update(); };
                        }
                    }

                }

                var image = data.image;

                if (!image || !image.naturalWidth) {
                    return;
                }

                var dimEl = {
                    width: this.$el.offsetWidth,
                    height: this.$el.offsetHeight
                };
                var dimImage = {
                    width: image.naturalWidth,
                    height: image.naturalHeight
                };

                var dim = Dimensions.cover(dimImage, dimEl);

                this.bgProps.forEach(function (prop) {

                    var ref = this$1.props[prop];
                    var diff = ref.diff;
                    var bgPos = ref.bgPos;
                    var steps = ref.steps;
                    var attr = prop === 'bgy' ? 'height' : 'width';
                    var span = dim[attr] - dimEl[attr];

                    if (span < diff) {
                        dimEl[attr] = dim[attr] + diff - span;
                    } else if (span > diff) {

                        var posPercentage = dimEl[attr] / toPx(bgPos, attr, this$1.$el);

                        if (posPercentage) {
                            this$1.props[prop].steps = steps.map(function (step) { return step - (span - diff) / posPercentage; });
                        }
                    }

                    dim = Dimensions.cover(dimImage, dimEl);
                });

                data.dim = dim;
            },

            write: function(ref) {
                var dim = ref.dim;
                var active = ref.active;


                if (!active) {
                    css(this.$el, {backgroundSize: '', backgroundRepeat: ''});
                    return;
                }

                dim && css(this.$el, {
                    backgroundSize: ((dim.width) + "px " + (dim.height) + "px"),
                    backgroundRepeat: 'no-repeat'
                });

            },

            events: ['resize']

        },

        methods: {

            reset: function() {
                var this$1 = this;

                each(this.getCss(0), function (_, prop) { return css(this$1.$el, prop, ''); });
            },

            getCss: function(percent) {

                var ref = this;
                var props = ref.props;
                return Object.keys(props).reduce(function (css, prop) {

                    var ref = props[prop];
                    var steps = ref.steps;
                    var unit = ref.unit;
                    var pos = ref.pos;
                    var value = getValue(steps, percent);

                    switch (prop) {

                        // transforms
                        case 'x':
                        case 'y': {
                            unit = unit || 'px';
                            css.transform += " translate" + (ucfirst(prop)) + "(" + (toFloat(value).toFixed(unit === 'px' ? 0 : 2)) + unit + ")";
                            break;
                        }
                        case 'rotate':
                            unit = unit || 'deg';
                            css.transform += " rotate(" + (value + unit) + ")";
                            break;
                        case 'scale':
                            css.transform += " scale(" + value + ")";
                            break;

                        // bg image
                        case 'bgy':
                        case 'bgx':
                            css[("background-position-" + (prop[2]))] = "calc(" + pos + " + " + value + "px)";
                            break;

                        // color
                        case 'color':
                        case 'backgroundColor':
                        case 'borderColor': {

                            var ref$1 = getStep(steps, percent);
                            var start = ref$1[0];
                            var end = ref$1[1];
                            var p = ref$1[2];

                            css[prop] = "rgba(" + (start.map(function (value, i) {
                                    value = value + p * (end[i] - value);
                                    return i === 3 ? toFloat(value) : parseInt(value, 10);
                                }).join(',')) + ")";
                            break;
                        }
                        // CSS Filter
                        case 'blur':
                            unit = unit || 'px';
                            css.filter += " blur(" + (value + unit) + ")";
                            break;
                        case 'hue':
                            unit = unit || 'deg';
                            css.filter += " hue-rotate(" + (value + unit) + ")";
                            break;
                        case 'fopacity':
                            unit = unit || '%';
                            css.filter += " opacity(" + (value + unit) + ")";
                            break;
                        case 'grayscale':
                        case 'invert':
                        case 'saturate':
                        case 'sepia':
                            unit = unit || '%';
                            css.filter += " " + prop + "(" + (value + unit) + ")";
                            break;
                        default:
                            css[prop] = value;
                    }

                    return css;

                }, {transform: '', filter: ''});

            }

        }

    };

    function parseColor(el, color) {
        return css(css(el, 'color', color), 'color')
            .split(/[(),]/g)
            .slice(1, -1)
            .concat(1)
            .slice(0, 4)
            .map(toFloat);
    }

    function getStep(steps, percent) {
        var count = steps.length - 1;
        var index = Math.min(Math.floor(count * percent), count - 1);
        var step = steps.slice(index, index + 2);

        step.push(percent === 1 ? 1 : percent % (1 / count) * count);

        return step;
    }

    function getValue(steps, percent, digits) {
        if ( digits === void 0 ) digits = 2;

        var ref = getStep(steps, percent);
        var start = ref[0];
        var end = ref[1];
        var p = ref[2];
        return (isNumber(start)
            ? start + Math.abs(start - end) * p * (start < end ? 1 : -1)
            : +end
        ).toFixed(digits);
    }

    function getUnit(steps) {
        return steps.reduce(function (unit, step) { return isString(step) && step.replace(/-|\d/g, '').trim() || unit; }, '');
    }

    function covers(el) {
        var ref = el.style;
        var backgroundSize = ref.backgroundSize;
        var covers = css(css(el, 'backgroundSize', ''), 'backgroundSize') === 'cover';
        el.style.backgroundSize = backgroundSize;
        return covers;
    }

    var parallax = {

        mixins: [Parallax],

        props: {
            target: String,
            viewport: Number,
            easing: Number
        },

        data: {
            target: false,
            viewport: 1,
            easing: 1
        },

        computed: {

            target: function(ref, $el) {
                var target = ref.target;

                return getOffsetElement(target && query(target, $el) || $el);
            }

        },

        update: {

            read: function(ref, type) {
                var percent = ref.percent;
                var active = ref.active;


                if (type !== 'scroll') {
                    percent = false;
                }

                if (!active) {
                    return;
                }

                var prev = percent;
                percent = ease(scrolledOver(this.target) / (this.viewport || 1), this.easing);

                return {
                    percent: percent,
                    style: prev !== percent ? this.getCss(percent) : false
                };
            },

            write: function(ref) {
                var style = ref.style;
                var active = ref.active;


                if (!active) {
                    this.reset();
                    return;
                }

                style && css(this.$el, style);

            },

            events: ['scroll', 'resize']
        }

    };

    function ease(percent, easing) {
        return clamp(percent * (1 - (easing - easing * percent)));
    }

    // SVG elements do not inherit from HTMLElement
    function getOffsetElement(el) {
        return el
            ? 'offsetTop' in el
                ? el
                : getOffsetElement(el.parentNode)
            : document.body;
    }

    var SliderReactive = {

        update: {

            write: function() {

                if (this.stack.length || this.dragging) {
                    return;
                }

                var index = this.getValidIndex(this.index);

                if (!~this.prevIndex || this.index !== index) {
                    this.show(index);
                }

            },

            events: ['resize']

        }

    };

    function Transitioner$1 (prev, next, dir, ref) {
        var center = ref.center;
        var easing = ref.easing;
        var list = ref.list;


        var deferred = new Deferred();

        var from = prev
            ? getLeft(prev, list, center)
            : getLeft(next, list, center) + offset(next).width * dir;
        var to = next
            ? getLeft(next, list, center)
            : from + offset(prev).width * dir * (isRtl ? -1 : 1);

        return {

            dir: dir,

            show: function(duration, percent, linear) {
                if ( percent === void 0 ) percent = 0;


                var timing = linear ? 'linear' : easing;
                duration -= Math.round(duration * clamp(percent, -1, 1));

                this.translate(percent);

                prev && this.updateTranslates();
                percent = prev ? percent : clamp(percent, 0, 1);
                triggerUpdate$1(this.getItemIn(), 'itemin', {percent: percent, duration: duration, timing: timing, dir: dir});
                prev && triggerUpdate$1(this.getItemIn(true), 'itemout', {percent: 1 - percent, duration: duration, timing: timing, dir: dir});

                Transition
                    .start(list, {transform: translate(-to * (isRtl ? -1 : 1), 'px')}, duration, timing)
                    .then(deferred.resolve, noop);

                return deferred.promise;

            },

            stop: function() {
                return Transition.stop(list);
            },

            cancel: function() {
                Transition.cancel(list);
            },

            reset: function() {
                css(list, 'transform', '');
            },

            forward: function(duration, percent) {
                if ( percent === void 0 ) percent = this.percent();

                Transition.cancel(list);
                return this.show(duration, percent, true);
            },

            translate: function(percent) {

                var distance = this.getDistance() * dir * (isRtl ? -1 : 1);

                css(list, 'transform', translate(clamp(
                    -to + (distance - distance * percent),
                    -getWidth(list),
                    offset(list).width
                ) * (isRtl ? -1 : 1), 'px'));

                this.updateTranslates();

                if (prev) {
                    percent = clamp(percent, -1, 1);
                    triggerUpdate$1(this.getItemIn(), 'itemtranslatein', {percent: percent, dir: dir});
                    triggerUpdate$1(this.getItemIn(true), 'itemtranslateout', {percent: 1 - percent, dir: dir});
                }

            },

            percent: function() {
                return Math.abs((css(list, 'transform').split(',')[4] * (isRtl ? -1 : 1) + from) / (to - from));
            },

            getDistance: function() {
                return Math.abs(to - from);
            },

            getItemIn: function(out) {
                if ( out === void 0 ) out = false;


                var actives = this.getActives();
                var all = sortBy(slides(list), 'offsetLeft');
                var i = index(all, actives[dir * (out ? -1 : 1) > 0 ? actives.length - 1 : 0]);

                return ~i && all[i + (prev && !out ? dir : 0)];

            },

            getActives: function() {

                var left = getLeft(prev || next, list, center);

                return sortBy(slides(list).filter(function (slide) {
                    var slideLeft = getElLeft(slide, list);
                    return slideLeft >= left && slideLeft + offset(slide).width <= offset(list).width + left;
                }), 'offsetLeft');

            },

            updateTranslates: function() {

                var actives = this.getActives();

                slides(list).forEach(function (slide) {
                    var isActive = includes(actives, slide);

                    triggerUpdate$1(slide, ("itemtranslate" + (isActive ? 'in' : 'out')), {
                        percent: isActive ? 1 : 0,
                        dir: slide.offsetLeft <= next.offsetLeft ? 1 : -1
                    });
                });
            }

        };

    }

    function getLeft(el, list, center) {

        var left = getElLeft(el, list);

        return center
            ? left - centerEl(el, list)
            : Math.min(left, getMax(list));

    }

    function getMax(list) {
        return Math.max(0, getWidth(list) - offset(list).width);
    }

    function getWidth(list) {
        return slides(list).reduce(function (right, el) { return offset(el).width + right; }, 0);
    }

    function getMaxWidth(list) {
        return slides(list).reduce(function (right, el) { return Math.max(right, offset(el).width); }, 0);
    }

    function centerEl(el, list) {
        return offset(list).width / 2 - offset(el).width / 2;
    }

    function getElLeft(el, list) {
        return (position(el).left + (isRtl ? offset(el).width - offset(list).width : 0)) * (isRtl ? -1 : 1);
    }

    function triggerUpdate$1(el, type, data) {
        trigger(el, createEvent(type, false, false, data));
    }

    function slides(list) {
        return children(list);
    }

    var slider = {

        mixins: [Class, Slider, SliderReactive],

        props: {
            center: Boolean,
            sets: Boolean
        },

        data: {
            center: false,
            sets: false,
            attrItem: 'uk-slider-item',
            selList: '.uk-slider-items',
            selNav: '.uk-slider-nav',
            clsContainer: 'uk-slider-container',
            Transitioner: Transitioner$1
        },

        computed: {

            avgWidth: function() {
                return getWidth(this.list) / this.length;
            },

            finite: function(ref) {
                var finite = ref.finite;

                return finite || Math.ceil(getWidth(this.list)) < offset(this.list).width + getMaxWidth(this.list) + this.center;
            },

            maxIndex: function() {

                if (!this.finite || this.center && !this.sets) {
                    return this.length - 1;
                }

                if (this.center) {
                    return last(this.sets);
                }

                css(this.slides, 'order', '');

                var max = getMax(this.list);
                var i = this.length;

                while (i--) {
                    if (getElLeft(this.list.children[i], this.list) < max) {
                        return Math.min(i + 1, this.length - 1);
                    }
                }

                return 0;
            },

            sets: function(ref) {
                var this$1 = this;
                var sets = ref.sets;


                var width = offset(this.list).width / (this.center ? 2 : 1);

                var left = 0;
                var leftCenter = width;
                var slideLeft = 0;

                sets = sets && this.slides.reduce(function (sets, slide, i) {

                    var ref = offset(slide);
                    var slideWidth = ref.width;
                    var slideRight = slideLeft + slideWidth;

                    if (slideRight > left) {

                        if (!this$1.center && i > this$1.maxIndex) {
                            i = this$1.maxIndex;
                        }

                        if (!includes(sets, i)) {

                            var cmp = this$1.slides[i + 1];
                            if (this$1.center && cmp && slideWidth < leftCenter - offset(cmp).width / 2) {
                                leftCenter -= slideWidth;
                            } else {
                                leftCenter = width;
                                sets.push(i);
                                left = slideLeft + width + (this$1.center ? slideWidth / 2 : 0);
                            }

                        }
                    }

                    slideLeft += slideWidth;

                    return sets;

                }, []);

                return !isEmpty(sets) && sets;

            },

            transitionOptions: function() {
                return {
                    center: this.center,
                    list: this.list
                };
            }

        },

        connected: function() {
            toggleClass(this.$el, this.clsContainer, !$(("." + (this.clsContainer)), this.$el));
        },

        update: {

            write: function() {
                var this$1 = this;


                $$(("[" + (this.attrItem) + "],[data-" + (this.attrItem) + "]"), this.$el).forEach(function (el) {
                    var index = data(el, this$1.attrItem);
                    this$1.maxIndex && toggleClass(el, 'uk-hidden', isNumeric(index) && (this$1.sets && !includes(this$1.sets, toFloat(index)) || index > this$1.maxIndex));
                });

                if (this.length && !this.dragging && !this.stack.length) {
                    this._translate(1);
                }

            },

            events: ['resize']

        },

        events: {

            beforeitemshow: function(e) {

                if (!this.dragging && this.sets && this.stack.length < 2 && !includes(this.sets, this.index)) {
                    this.index = this.getValidIndex();
                }

                var diff = Math.abs(
                    this.index
                    - this.prevIndex
                    + (this.dir > 0 && this.index < this.prevIndex || this.dir < 0 && this.index > this.prevIndex ? (this.maxIndex + 1) * this.dir : 0)
                );

                if (!this.dragging && diff > 1) {

                    for (var i = 0; i < diff; i++) {
                        this.stack.splice(1, 0, this.dir > 0 ? 'next' : 'previous');
                    }

                    e.preventDefault();
                    return;
                }

                this.duration = speedUp(this.avgWidth / this.velocity)
                    * (offset(
                        this.dir < 0 || !this.slides[this.prevIndex]
                            ? this.slides[this.index]
                            : this.slides[this.prevIndex]
                    ).width / this.avgWidth);

                this.reorder();

            },

            itemshow: function() {
                !isUndefined(this.prevIndex) && addClass(this._getTransitioner().getItemIn(), this.clsActive);
            },

            itemshown: function() {
                var this$1 = this;

                var actives = this._getTransitioner(this.index).getActives();
                this.slides.forEach(function (slide) { return toggleClass(slide, this$1.clsActive, includes(actives, slide)); });
                (!this.sets || includes(this.sets, toFloat(this.index))) && this.slides.forEach(function (slide) { return toggleClass(slide, this$1.clsActivated, includes(actives, slide)); });
            }

        },

        methods: {

            reorder: function() {
                var this$1 = this;


                css(this.slides, 'order', '');

                if (this.finite) {
                    return;
                }

                var index = this.dir > 0 && this.slides[this.prevIndex] ? this.prevIndex : this.index;

                this.slides.forEach(function (slide, i) { return css(slide, 'order', this$1.dir > 0 && i < index
                        ? 1
                        : this$1.dir < 0 && i >= this$1.index
                            ? -1
                            : ''
                    ); }
                );

                if (!this.center) {
                    return;
                }

                var next = this.slides[index];
                var width = offset(this.list).width / 2 - offset(next).width / 2;
                var j = 0;

                while (width > 0) {
                    var slideIndex = this.getIndex(--j + index, index);
                    var slide = this.slides[slideIndex];

                    css(slide, 'order', slideIndex > index ? -2 : -1);
                    width -= offset(slide).width;
                }

            },

            getValidIndex: function(index, prevIndex) {
                if ( index === void 0 ) index = this.index;
                if ( prevIndex === void 0 ) prevIndex = this.prevIndex;


                index = this.getIndex(index, prevIndex);

                if (!this.sets) {
                    return index;
                }

                var prev;

                do {

                    if (includes(this.sets, index)) {
                        return index;
                    }

                    prev = index;
                    index = this.getIndex(index + this.dir, prevIndex);

                } while (index !== prev);

                return index;
            }

        }

    };

    var sliderParallax = {

        mixins: [Parallax],

        data: {
            selItem: '!li'
        },

        computed: {

            item: function(ref, $el) {
                var selItem = ref.selItem;

                return query(selItem, $el);
            }

        },

        events: [

            {

                name: 'itemshown',

                self: true,

                el: function() {
                    return this.item;
                },

                handler: function() {
                    css(this.$el, this.getCss(.5));
                }

            },

            {
                name: 'itemin itemout',

                self: true,

                el: function() {
                    return this.item;
                },

                handler: function(ref) {
                    var type = ref.type;
                    var ref_detail = ref.detail;
                    var percent = ref_detail.percent;
                    var duration = ref_detail.duration;
                    var timing = ref_detail.timing;
                    var dir = ref_detail.dir;


                    Transition.cancel(this.$el);
                    css(this.$el, this.getCss(getCurrent(type, dir, percent)));

                    Transition.start(this.$el, this.getCss(isIn(type)
                        ? .5
                        : dir > 0
                            ? 1
                            : 0
                    ), duration, timing).catch(noop);

                }
            },

            {
                name: 'transitioncanceled transitionend',

                self: true,

                el: function() {
                    return this.item;
                },

                handler: function() {
                    Transition.cancel(this.$el);
                }

            },

            {
                name: 'itemtranslatein itemtranslateout',

                self: true,

                el: function() {
                    return this.item;
                },

                handler: function(ref) {
                    var type = ref.type;
                    var ref_detail = ref.detail;
                    var percent = ref_detail.percent;
                    var dir = ref_detail.dir;

                    Transition.cancel(this.$el);
                    css(this.$el, this.getCss(getCurrent(type, dir, percent)));
                }
            }

        ]

    };

    function isIn(type) {
        return endsWith(type, 'in');
    }

    function getCurrent(type, dir, percent) {

        percent /= 2;

        return !isIn(type)
            ? dir < 0
                ? percent
                : 1 - percent
            : dir < 0
                ? 1 - percent
                : percent;
    }

    var Animations$2 = assign({}, Animations, {

        fade: {

            show: function() {
                return [
                    {opacity: 0, zIndex: 0},
                    {zIndex: -1}
                ];
            },

            percent: function(current) {
                return 1 - css(current, 'opacity');
            },

            translate: function(percent) {
                return [
                    {opacity: 1 - percent, zIndex: 0},
                    {zIndex: -1}
                ];
            }

        },

        scale: {

            show: function() {
                return [
                    {opacity: 0, transform: scale3d(1 + .5), zIndex: 0},
                    {zIndex: -1}
                ];
            },

            percent: function(current) {
                return 1 - css(current, 'opacity');
            },

            translate: function(percent) {
                return [
                    {opacity: 1 - percent, transform: scale3d(1 + .5 * percent), zIndex: 0},
                    {zIndex: -1}
                ];
            }

        },

        pull: {

            show: function(dir) {
                return dir < 0
                    ? [
                        {transform: translate(30), zIndex: -1},
                        {transform: translate(), zIndex: 0}
                    ]
                    : [
                        {transform: translate(-100), zIndex: 0},
                        {transform: translate(), zIndex: -1}
                    ];
            },

            percent: function(current, next, dir) {
                return dir < 0
                    ? 1 - translated(next)
                    : translated(current);
            },

            translate: function(percent, dir) {
                return dir < 0
                    ? [
                        {transform: translate(30 * percent), zIndex: -1},
                        {transform: translate(-100 * (1 - percent)), zIndex: 0}
                    ]
                    : [
                        {transform: translate(-percent * 100), zIndex: 0},
                        {transform: translate(30 * (1 - percent)), zIndex: -1}
                    ];
            }

        },

        push: {

            show: function(dir) {
                return dir < 0
                    ? [
                        {transform: translate(100), zIndex: 0},
                        {transform: translate(), zIndex: -1}
                    ]
                    : [
                        {transform: translate(-30), zIndex: -1},
                        {transform: translate(), zIndex: 0}
                    ];
            },

            percent: function(current, next, dir) {
                return dir > 0
                    ? 1 - translated(next)
                    : translated(current);
            },

            translate: function(percent, dir) {
                return dir < 0
                    ? [
                        {transform: translate(percent * 100), zIndex: 0},
                        {transform: translate(-30 * (1 - percent)), zIndex: -1}
                    ]
                    : [
                        {transform: translate(-30 * percent), zIndex: -1},
                        {transform: translate(100 * (1 - percent)), zIndex: 0}
                    ];
            }

        }

    });

    var slideshow = {

        mixins: [Class, Slideshow, SliderReactive],

        props: {
            ratio: String,
            minHeight: Number,
            maxHeight: Number
        },

        data: {
            ratio: '16:9',
            minHeight: false,
            maxHeight: false,
            selList: '.uk-slideshow-items',
            attrItem: 'uk-slideshow-item',
            selNav: '.uk-slideshow-nav',
            Animations: Animations$2
        },

        update: {

            read: function() {

                var ref = this.ratio.split(':').map(Number);
                var width = ref[0];
                var height = ref[1];

                height = height * this.list.offsetWidth / width || 0;

                if (this.minHeight) {
                    height = Math.max(this.minHeight, height);
                }

                if (this.maxHeight) {
                    height = Math.min(this.maxHeight, height);
                }

                return {height: height - boxModelAdjust(this.list, 'height', 'content-box')};
            },

            write: function(ref) {
                var height = ref.height;

                height > 0 && css(this.list, 'minHeight', height);
            },

            events: ['resize']

        }

    };

    var sortable = {

        mixins: [Class, Animate],

        props: {
            group: String,
            threshold: Number,
            clsItem: String,
            clsPlaceholder: String,
            clsDrag: String,
            clsDragState: String,
            clsBase: String,
            clsNoDrag: String,
            clsEmpty: String,
            clsCustom: String,
            handle: String
        },

        data: {
            group: false,
            threshold: 5,
            clsItem: 'uk-sortable-item',
            clsPlaceholder: 'uk-sortable-placeholder',
            clsDrag: 'uk-sortable-drag',
            clsDragState: 'uk-drag',
            clsBase: 'uk-sortable',
            clsNoDrag: 'uk-sortable-nodrag',
            clsEmpty: 'uk-sortable-empty',
            clsCustom: '',
            handle: false,
            pos: {}
        },

        created: function() {
            var this$1 = this;

            ['init', 'start', 'move', 'end'].forEach(function (key) {
                var fn = this$1[key];
                this$1[key] = function (e) {
                    assign(this$1.pos, getEventPos(e));
                    fn(e);
                };
            });
        },

        events: {

            name: pointerDown,
            passive: false,
            handler: 'init'

        },

        computed: {

            target: function() {
                return (this.$el.tBodies || [this.$el])[0];
            },

            items: function() {
                return children(this.target);
            },

            isEmpty: {

                get: function() {
                    return isEmpty(this.items);
                },

                watch: function(empty) {
                    toggleClass(this.target, this.clsEmpty, empty);
                },

                immediate: true

            },

            handles: {

                get: function(ref, el) {
                    var handle = ref.handle;

                    return handle ? $$(handle, el) : this.items;
                },

                watch: function(handles, prev) {
                    css(prev, {touchAction: '', userSelect: ''});
                    css(handles, {touchAction: hasTouch ? 'none' : '', userSelect: 'none'}); // touchAction set to 'none' causes a performance drop in Chrome 80
                },

                immediate: true

            }

        },

        update: {

            write: function() {

                if (!this.drag || !parent(this.placeholder)) {
                    return;
                }

                // clamp to viewport
                var ref = this.pos;
                var x = ref.x;
                var y = ref.y;
                var ref$1 = this.origin;
                var offsetTop = ref$1.offsetTop;
                var offsetLeft = ref$1.offsetLeft;
                var ref$2 = this.drag;
                var offsetHeight = ref$2.offsetHeight;
                var offsetWidth = ref$2.offsetWidth;
                var ref$3 = offset(window);
                var right = ref$3.right;
                var bottom = ref$3.bottom;
                var target = document.elementFromPoint(x, y);

                css(this.drag, {
                    top: clamp(y - offsetTop, 0, bottom - offsetHeight),
                    left: clamp(x - offsetLeft, 0, right - offsetWidth)
                });

                var sortable = this.getSortable(target);
                var previous = this.getSortable(this.placeholder);
                var move = sortable !== previous;

                if (!sortable || within(target, this.placeholder) || move && (!sortable.group || sortable.group !== previous.group)) {
                    return;
                }

                target = sortable.target === target.parentNode && target || sortable.items.filter(function (element) { return within(target, element); })[0];

                if (move) {
                    previous.remove(this.placeholder);
                } else if (!target) {
                    return;
                }

                sortable.insert(this.placeholder, target);

                if (!includes(this.touched, sortable)) {
                    this.touched.push(sortable);
                }

            },

            events: ['move']

        },

        methods: {

            init: function(e) {

                var target = e.target;
                var button = e.button;
                var defaultPrevented = e.defaultPrevented;
                var ref = this.items.filter(function (el) { return within(target, el); });
                var placeholder = ref[0];

                if (!placeholder
                    || defaultPrevented
                    || button > 0
                    || isInput(target)
                    || within(target, ("." + (this.clsNoDrag)))
                    || this.handle && !within(target, this.handle)
                ) {
                    return;
                }

                e.preventDefault();

                this.touched = [this];
                this.placeholder = placeholder;
                this.origin = assign({target: target, index: index(placeholder)}, this.pos);

                on(document, pointerMove, this.move);
                on(document, pointerUp, this.end);

                if (!this.threshold) {
                    this.start(e);
                }

            },

            start: function(e) {

                this.drag = appendDrag(this.$container, this.placeholder);
                var ref = this.placeholder.getBoundingClientRect();
                var left = ref.left;
                var top = ref.top;
                assign(this.origin, {offsetLeft: this.pos.x - left, offsetTop: this.pos.y - top});

                addClass(this.drag, this.clsDrag, this.clsCustom);
                addClass(this.placeholder, this.clsPlaceholder);
                addClass(this.items, this.clsItem);
                addClass(document.documentElement, this.clsDragState);

                trigger(this.$el, 'start', [this, this.placeholder]);

                trackScroll(this.pos);

                this.move(e);
            },

            move: function(e) {

                if (this.drag) {
                    this.$emit('move');
                } else if (Math.abs(this.pos.x - this.origin.x) > this.threshold || Math.abs(this.pos.y - this.origin.y) > this.threshold) {
                    this.start(e);
                }

            },

            end: function(e) {

                off(document, pointerMove, this.move);
                off(document, pointerUp, this.end);
                off(window, 'scroll', this.scroll);

                if (!this.drag) {
                    if (e.type === 'touchend') {
                        e.target.click();
                    }

                    return;
                }

                untrackScroll();

                var sortable = this.getSortable(this.placeholder);

                if (this === sortable) {
                    if (this.origin.index !== index(this.placeholder)) {
                        trigger(this.$el, 'moved', [this, this.placeholder]);
                    }
                } else {
                    trigger(sortable.$el, 'added', [sortable, this.placeholder]);
                    trigger(this.$el, 'removed', [this, this.placeholder]);
                }

                trigger(this.$el, 'stop', [this, this.placeholder]);

                remove(this.drag);
                this.drag = null;

                var classes = this.touched.map(function (sortable) { return ((sortable.clsPlaceholder) + " " + (sortable.clsItem)); }).join(' ');
                this.touched.forEach(function (sortable) { return removeClass(sortable.items, classes); });

                removeClass(document.documentElement, this.clsDragState);

            },

            insert: function(element, target) {
                var this$1 = this;


                addClass(this.items, this.clsItem);

                var insert = function () {

                    if (target) {

                        if (!within(element, this$1.target) || isPredecessor(element, target)) {
                            before(target, element);
                        } else {
                            after(target, element);
                        }

                    } else {
                        append(this$1.target, element);
                    }

                };

                if (this.animation) {
                    this.animate(insert);
                } else {
                    insert();
                }

            },

            remove: function(element) {

                if (!within(element, this.target)) {
                    return;
                }

                if (this.animation) {
                    this.animate(function () { return remove(element); });
                } else {
                    remove(element);
                }

            },

            getSortable: function(element) {
                return element && (this.$getComponent(element, 'sortable') || this.getSortable(element.parentNode));
            }

        }

    };

    function isPredecessor(element, target) {
        return element.parentNode === target.parentNode && index(element) > index(target);
    }

    var trackTimer;
    function trackScroll(pos) {

        var last = Date.now();
        trackTimer = setInterval(function () {

            var x = pos.x;
            var y = pos.y;
            y += window.pageYOffset;

            var dist = (Date.now() - last) * .3;
            last = Date.now();

            scrollParents(document.elementFromPoint(x, pos.y)).some(function (scrollEl) {

                var scroll = scrollEl.scrollTop;
                var scrollHeight = scrollEl.scrollHeight;

                var ref = offset(getViewport(scrollEl));
                var top = ref.top;
                var bottom = ref.bottom;
                var height = ref.height;

                if (top < y && top + 30 > y) {
                    scroll -= dist;
                } else if (bottom > y && bottom - 30 < y) {
                    scroll += dist;
                } else {
                    return;
                }

                if (scroll > 0 && scroll < scrollHeight - height) {
                    scrollTop(scrollEl, scroll);
                    return true;
                }

            });

        }, 15);

    }

    function untrackScroll() {
        clearInterval(trackTimer);
    }

    function appendDrag(container, element) {
        var clone = append(container, element.outerHTML.replace(/(^<)(?:li|tr)|(?:li|tr)(\/>$)/g, '$1div$2'));

        attr(clone, 'style', ((attr(clone, 'style')) + ";margin:0!important"));

        css(clone, assign({
            boxSizing: 'border-box',
            width: element.offsetWidth,
            height: element.offsetHeight,
            overflow: 'hidden'
        }, css(element, ['paddingLeft', 'paddingRight', 'paddingTop', 'paddingBottom'])));

        height(clone.firstElementChild, height(element.firstElementChild));

        return clone;
    }

    var obj$1;

    var actives = [];

    var tooltip = {

        mixins: [Container, Togglable, Position],

        args: 'title',

        props: {
            delay: Number,
            title: String
        },

        data: {
            pos: 'top',
            title: '',
            delay: 0,
            animation: ['uk-animation-scale-up'],
            duration: 100,
            cls: 'uk-active',
            clsPos: 'uk-tooltip'
        },

        beforeConnect: function() {
            this._hasTitle = hasAttr(this.$el, 'title');
            attr(this.$el, {title: '', 'aria-expanded': false});
        },

        disconnected: function() {
            this.hide();
            attr(this.$el, {title: this._hasTitle ? this.title : null, 'aria-expanded': null});
        },

        methods: {

            show: function() {
                var this$1 = this;


                if (this.isActive() || !this.title) {
                    return;
                }

                actives.forEach(function (active) { return active.hide(); });
                actives.push(this);

                this._unbind = on(document, pointerUp, function (e) { return !within(e.target, this$1.$el) && this$1.hide(); });

                clearTimeout(this.showTimer);
                this.showTimer = setTimeout(this._show, this.delay);
            },

            hide: function() {
                var this$1 = this;


                if (!this.isActive() || matches(this.$el, 'input:focus')) {
                    return;
                }

                this.toggleElement(this.tooltip, false, false).then(function () {

                    actives.splice(actives.indexOf(this$1), 1);

                    clearTimeout(this$1.showTimer);
                    clearInterval(this$1.hideTimer);

                    this$1.tooltip = remove(this$1.tooltip);
                    this$1._unbind();
                });
            },

            _show: function() {
                var this$1 = this;


                this.tooltip = append(this.container,
                    ("<div class=\"" + (this.clsPos) + "\"> <div class=\"" + (this.clsPos) + "-inner\">" + (this.title) + "</div> </div>")
                );

                on(this.tooltip, 'toggled', function () {

                    var toggled = this$1.isToggled(this$1.tooltip);

                    attr(this$1.$el, 'aria-expanded', toggled);

                    if (!toggled) {
                        return;
                    }

                    this$1.positionAt(this$1.tooltip, this$1.$el);

                    this$1.origin = this$1.getAxis() === 'y'
                        ? ((flipPosition(this$1.dir)) + "-" + (this$1.align))
                        : ((this$1.align) + "-" + (flipPosition(this$1.dir)));
                });

                this.toggleElement(this.tooltip, true);

                this.hideTimer = setInterval(function () { return !isVisible(this$1.$el) && this$1.hide(); }, 150);

            },

            isActive: function() {
                return includes(actives, this);
            }

        },

        events: ( obj$1 = {

            focus: 'show',
            blur: 'hide'

        }, obj$1[(pointerEnter + " " + pointerLeave)] = function (e) {
                if (isTouch(e)) {
                    return;
                }
                e.type === pointerEnter
                    ? this.show()
                    : this.hide();
            }, obj$1[pointerDown] = function (e) {
                if (!isTouch(e)) {
                    return;
                }
                this.isActive()
                    ? this.hide()
                    : this.show();
            }, obj$1 )

    };

    var upload = {

        props: {
            allow: String,
            clsDragover: String,
            concurrent: Number,
            maxSize: Number,
            method: String,
            mime: String,
            msgInvalidMime: String,
            msgInvalidName: String,
            msgInvalidSize: String,
            multiple: Boolean,
            name: String,
            params: Object,
            type: String,
            url: String
        },

        data: {
            allow: false,
            clsDragover: 'uk-dragover',
            concurrent: 1,
            maxSize: 0,
            method: 'POST',
            mime: false,
            msgInvalidMime: 'Invalid File Type: %s',
            msgInvalidName: 'Invalid File Name: %s',
            msgInvalidSize: 'Invalid File Size: %s Kilobytes Max',
            multiple: false,
            name: 'files[]',
            params: {},
            type: '',
            url: '',
            abort: noop,
            beforeAll: noop,
            beforeSend: noop,
            complete: noop,
            completeAll: noop,
            error: noop,
            fail: noop,
            load: noop,
            loadEnd: noop,
            loadStart: noop,
            progress: noop
        },

        events: {

            change: function(e) {

                if (!matches(e.target, 'input[type="file"]')) {
                    return;
                }

                e.preventDefault();

                if (e.target.files) {
                    this.upload(e.target.files);
                }

                e.target.value = '';
            },

            drop: function(e) {
                stop(e);

                var transfer = e.dataTransfer;

                if (!transfer || !transfer.files) {
                    return;
                }

                removeClass(this.$el, this.clsDragover);

                this.upload(transfer.files);
            },

            dragenter: function(e) {
                stop(e);
            },

            dragover: function(e) {
                stop(e);
                addClass(this.$el, this.clsDragover);
            },

            dragleave: function(e) {
                stop(e);
                removeClass(this.$el, this.clsDragover);
            }

        },

        methods: {

            upload: function(files) {
                var this$1 = this;


                if (!files.length) {
                    return;
                }

                trigger(this.$el, 'upload', [files]);

                for (var i = 0; i < files.length; i++) {

                    if (this.maxSize && this.maxSize * 1000 < files[i].size) {
                        this.fail(this.msgInvalidSize.replace('%s', this.maxSize));
                        return;
                    }

                    if (this.allow && !match$1(this.allow, files[i].name)) {
                        this.fail(this.msgInvalidName.replace('%s', this.allow));
                        return;
                    }

                    if (this.mime && !match$1(this.mime, files[i].type)) {
                        this.fail(this.msgInvalidMime.replace('%s', this.mime));
                        return;
                    }

                }

                if (!this.multiple) {
                    files = [files[0]];
                }

                this.beforeAll(this, files);

                var chunks = chunk(files, this.concurrent);
                var upload = function (files) {

                    var data = new FormData();

                    files.forEach(function (file) { return data.append(this$1.name, file); });

                    for (var key in this$1.params) {
                        data.append(key, this$1.params[key]);
                    }

                    ajax(this$1.url, {
                        data: data,
                        method: this$1.method,
                        responseType: this$1.type,
                        beforeSend: function (env) {

                            var xhr = env.xhr;
                            xhr.upload && on(xhr.upload, 'progress', this$1.progress);
                            ['loadStart', 'load', 'loadEnd', 'abort'].forEach(function (type) { return on(xhr, type.toLowerCase(), this$1[type]); }
                            );

                            this$1.beforeSend(env);

                        }
                    }).then(
                        function (xhr) {

                            this$1.complete(xhr);

                            if (chunks.length) {
                                upload(chunks.shift());
                            } else {
                                this$1.completeAll(xhr);
                            }

                        },
                        function (e) { return this$1.error(e); }
                    );

                };

                upload(chunks.shift());

            }

        }

    };

    function match$1(pattern, path) {
        return path.match(new RegExp(("^" + (pattern.replace(/\//g, '\\/').replace(/\*\*/g, '(\\/[^\\/]+)*').replace(/\*/g, '[^\\/]+').replace(/((?!\\))\?/g, '$1.')) + "$"), 'i'));
    }

    function chunk(files, size) {
        var chunks = [];
        for (var i = 0; i < files.length; i += size) {
            var chunk = [];
            for (var j = 0; j < size; j++) {
                chunk.push(files[i + j]);
            }
            chunks.push(chunk);
        }
        return chunks;
    }

    function stop(e) {
        e.preventDefault();
        e.stopPropagation();
    }

    var components = /*#__PURE__*/Object.freeze({
        __proto__: null,
        Countdown: countdown,
        Filter: filter$1,
        Lightbox: lightbox,
        LightboxPanel: LightboxPanel,
        Notification: notification,
        Parallax: parallax,
        Slider: slider,
        SliderParallax: sliderParallax,
        Slideshow: slideshow,
        SlideshowParallax: sliderParallax,
        Sortable: sortable,
        Tooltip: tooltip,
        Upload: upload
    });

    // register components
    each(coreComponents, register);
    each(components, register);

    // core functionality
    UIkit.use(Core);

    boot(UIkit);

    function register(component, name) {
        UIkit.component(name, component);
    }

    return UIkit;

})));

/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../../../timers-browserify/main.js */ "./node_modules/timers-browserify/main.js").setImmediate))

/***/ }),

/***/ "./node_modules/webpack/buildin/global.js":
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/*! no static exports found */
/***/ (function(module, exports) {

var g;

// This works in non-strict mode
g = (function() {
	return this;
})();

try {
	// This works if eval is allowed (see CSP)
	g = g || new Function("return this")();
} catch (e) {
	// This works if the window reference is available
	if (typeof window === "object") g = window;
}

// g can still be undefined, but nothing to do about it...
// We return undefined, instead of nothing here, so it's
// easier to handle this case. if(!global) { ...}

module.exports = g;


/***/ }),

/***/ "./node_modules/webpack/buildin/module.js":
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  !*** (webpack)/buildin/module.js ***!
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/*! no static exports found */
/***/ (function(module, exports) {

module.exports = function(module) {
	if (!module.webpackPolyfill) {
		module.deprecate = function() {};
		module.paths = [];
		// module.parent = undefined by default
		if (!module.children) module.children = [];
		Object.defineProperty(module, "loaded", {
			enumerable: true,
			get: function() {
				return module.l;
			}
		});
		Object.defineProperty(module, "id", {
			enumerable: true,
			get: function() {
				return module.i;
			}
		});
		module.webpackPolyfill = 1;
	}
	return module;
};


/***/ }),

/***/ "./resources/js/app.js":
/*!*****************************!*\
  !*** ./resources/js/app.js ***!
  \*****************************/
/*! no exports provided */
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var uikit__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! uikit */ "./node_modules/uikit/dist/js/uikit.js");
/* harmony import */ var uikit__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(uikit__WEBPACK_IMPORTED_MODULE_0__);
/* harmony import */ var uikit_dist_js_uikit_icons__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! uikit/dist/js/uikit-icons */ "./node_modules/uikit/dist/js/uikit-icons.js");
/* harmony import */ var uikit_dist_js_uikit_icons__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(uikit_dist_js_uikit_icons__WEBPACK_IMPORTED_MODULE_1__);
__webpack_require__(/*! ./bootstrap */ "./resources/js/bootstrap.js");



window.UIkit = uikit__WEBPACK_IMPORTED_MODULE_0___default.a;
uikit__WEBPACK_IMPORTED_MODULE_0___default.a.use(uikit_dist_js_uikit_icons__WEBPACK_IMPORTED_MODULE_1___default.a);

/***/ }),

/***/ "./resources/js/bootstrap.js":
/*!***********************************!*\
  !*** ./resources/js/bootstrap.js ***!
  \***********************************/
/*! no exports provided */
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var lodash__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! lodash */ "./node_modules/lodash/lodash.js");
/* harmony import */ var lodash__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(lodash__WEBPACK_IMPORTED_MODULE_0__);
/* harmony import */ var axios__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! axios */ "./node_modules/axios/index.js");
/* harmony import */ var axios__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(axios__WEBPACK_IMPORTED_MODULE_1__);


window._ = lodash__WEBPACK_IMPORTED_MODULE_0___default.a;
/**
 * We'll load the axios HTTP library which allows us to easily issue requests
 * to our Laravel back-end. This library automatically handles sending the
 * CSRF token as a header based on the value of the "XSRF" token cookie.
 */

window.axios = axios__WEBPACK_IMPORTED_MODULE_1___default.a;
window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
/**
 * Echo exposes an expressive API for subscribing to channels and listening
 * for events that are broadcast by Laravel. Echo and event broadcasting
 * allows your team to easily build robust real-time web applications.
 */
// import Echo from 'laravel-echo';
// window.Pusher = require('pusher-js');
// window.Echo = new Echo({
//     broadcaster: 'pusher',
//     key: process.env.MIX_PUSHER_APP_KEY,
//     cluster: process.env.MIX_PUSHER_APP_CLUSTER,
//     forceTLS: true
// });

/***/ }),

/***/ "./resources/sass/app.scss":
/*!*********************************!*\
  !*** ./resources/sass/app.scss ***!
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/*! no static exports found */
/***/ (function(module, exports) {

// removed by extract-text-webpack-plugin

/***/ }),

/***/ 0:
/*!*************************************************************!*\
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/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

__webpack_require__(/*! E:\Documentos\Escritorio\git\ttv-streamkit\resources\js\app.js */"./resources/js/app.js");
module.exports = __webpack_require__(/*! E:\Documentos\Escritorio\git\ttv-streamkit\resources\sass\app.scss */"./resources/sass/app.scss");


/***/ })

/******/ });