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3854 lines
112 KiB
3854 lines
112 KiB
/**
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* @license
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* Lodash (Custom Build) <https://lodash.com/>
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* Build: `lodash core -o ./dist/lodash.core.js`
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* Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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;(function() {
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/** Used as a safe reference for `undefined` in pre-ES5 environments. */
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var undefined;
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/** Used as the semantic version number. */
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var VERSION = '4.17.15';
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/** Error message constants. */
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var FUNC_ERROR_TEXT = 'Expected a function';
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/** Used to compose bitmasks for value comparisons. */
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var COMPARE_PARTIAL_FLAG = 1,
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COMPARE_UNORDERED_FLAG = 2;
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/** Used to compose bitmasks for function metadata. */
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var WRAP_BIND_FLAG = 1,
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WRAP_PARTIAL_FLAG = 32;
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/** Used as references for various `Number` constants. */
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var INFINITY = 1 / 0,
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MAX_SAFE_INTEGER = 9007199254740991;
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/** `Object#toString` result references. */
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var argsTag = '[object Arguments]',
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arrayTag = '[object Array]',
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asyncTag = '[object AsyncFunction]',
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boolTag = '[object Boolean]',
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dateTag = '[object Date]',
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errorTag = '[object Error]',
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funcTag = '[object Function]',
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genTag = '[object GeneratorFunction]',
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numberTag = '[object Number]',
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objectTag = '[object Object]',
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proxyTag = '[object Proxy]',
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regexpTag = '[object RegExp]',
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stringTag = '[object String]';
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/** Used to match HTML entities and HTML characters. */
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var reUnescapedHtml = /[&<>"']/g,
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reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
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/** Used to detect unsigned integer values. */
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var reIsUint = /^(?:0|[1-9]\d*)$/;
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/** Used to map characters to HTML entities. */
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var htmlEscapes = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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"'": '''
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};
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/** Detect free variable `global` from Node.js. */
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var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
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/** Detect free variable `self`. */
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var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
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/** Used as a reference to the global object. */
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var root = freeGlobal || freeSelf || Function('return this')();
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/** Detect free variable `exports`. */
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var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
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/** Detect free variable `module`. */
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var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
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/*--------------------------------------------------------------------------*/
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/**
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* Appends the elements of `values` to `array`.
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*
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* @private
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* @param {Array} array The array to modify.
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* @param {Array} values The values to append.
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* @returns {Array} Returns `array`.
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*/
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function arrayPush(array, values) {
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array.push.apply(array, values);
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return array;
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}
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/**
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* The base implementation of `_.findIndex` and `_.findLastIndex` without
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* support for iteratee shorthands.
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*
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* @private
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* @param {Array} array The array to inspect.
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* @param {Function} predicate The function invoked per iteration.
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* @param {number} fromIndex The index to search from.
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* @param {boolean} [fromRight] Specify iterating from right to left.
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* @returns {number} Returns the index of the matched value, else `-1`.
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*/
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function baseFindIndex(array, predicate, fromIndex, fromRight) {
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var length = array.length,
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index = fromIndex + (fromRight ? 1 : -1);
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while ((fromRight ? index-- : ++index < length)) {
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if (predicate(array[index], index, array)) {
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return index;
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}
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}
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return -1;
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}
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/**
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* The base implementation of `_.property` without support for deep paths.
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*
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* @private
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* @param {string} key The key of the property to get.
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* @returns {Function} Returns the new accessor function.
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*/
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function baseProperty(key) {
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return function(object) {
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return object == null ? undefined : object[key];
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};
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}
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/**
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* The base implementation of `_.propertyOf` without support for deep paths.
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*
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* @private
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* @param {Object} object The object to query.
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* @returns {Function} Returns the new accessor function.
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*/
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function basePropertyOf(object) {
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return function(key) {
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return object == null ? undefined : object[key];
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};
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}
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/**
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* The base implementation of `_.reduce` and `_.reduceRight`, without support
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* for iteratee shorthands, which iterates over `collection` using `eachFunc`.
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*
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* @private
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* @param {Array|Object} collection The collection to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {*} accumulator The initial value.
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* @param {boolean} initAccum Specify using the first or last element of
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* `collection` as the initial value.
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* @param {Function} eachFunc The function to iterate over `collection`.
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* @returns {*} Returns the accumulated value.
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*/
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function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
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eachFunc(collection, function(value, index, collection) {
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accumulator = initAccum
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? (initAccum = false, value)
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: iteratee(accumulator, value, index, collection);
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});
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return accumulator;
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}
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/**
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* The base implementation of `_.values` and `_.valuesIn` which creates an
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* array of `object` property values corresponding to the property names
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* of `props`.
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*
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* @private
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* @param {Object} object The object to query.
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* @param {Array} props The property names to get values for.
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* @returns {Object} Returns the array of property values.
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*/
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function baseValues(object, props) {
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return baseMap(props, function(key) {
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return object[key];
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});
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}
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/**
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* Used by `_.escape` to convert characters to HTML entities.
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*
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* @private
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* @param {string} chr The matched character to escape.
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* @returns {string} Returns the escaped character.
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*/
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var escapeHtmlChar = basePropertyOf(htmlEscapes);
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/**
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* Creates a unary function that invokes `func` with its argument transformed.
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*
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* @private
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* @param {Function} func The function to wrap.
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* @param {Function} transform The argument transform.
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* @returns {Function} Returns the new function.
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*/
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function overArg(func, transform) {
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return function(arg) {
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return func(transform(arg));
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};
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}
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/*--------------------------------------------------------------------------*/
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/** Used for built-in method references. */
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var arrayProto = Array.prototype,
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objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/** Used to generate unique IDs. */
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var idCounter = 0;
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/**
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* Used to resolve the
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* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
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* of values.
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*/
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var nativeObjectToString = objectProto.toString;
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/** Used to restore the original `_` reference in `_.noConflict`. */
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var oldDash = root._;
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/** Built-in value references. */
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var objectCreate = Object.create,
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propertyIsEnumerable = objectProto.propertyIsEnumerable;
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeIsFinite = root.isFinite,
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nativeKeys = overArg(Object.keys, Object),
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nativeMax = Math.max;
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/*------------------------------------------------------------------------*/
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/**
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* Creates a `lodash` object which wraps `value` to enable implicit method
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* chain sequences. Methods that operate on and return arrays, collections,
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* and functions can be chained together. Methods that retrieve a single value
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* or may return a primitive value will automatically end the chain sequence
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* and return the unwrapped value. Otherwise, the value must be unwrapped
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* with `_#value`.
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*
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* Explicit chain sequences, which must be unwrapped with `_#value`, may be
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* enabled using `_.chain`.
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*
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* The execution of chained methods is lazy, that is, it's deferred until
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* `_#value` is implicitly or explicitly called.
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*
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* Lazy evaluation allows several methods to support shortcut fusion.
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* Shortcut fusion is an optimization to merge iteratee calls; this avoids
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* the creation of intermediate arrays and can greatly reduce the number of
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* iteratee executions. Sections of a chain sequence qualify for shortcut
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* fusion if the section is applied to an array and iteratees accept only
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* one argument. The heuristic for whether a section qualifies for shortcut
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* fusion is subject to change.
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*
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* Chaining is supported in custom builds as long as the `_#value` method is
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* directly or indirectly included in the build.
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*
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* In addition to lodash methods, wrappers have `Array` and `String` methods.
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*
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* The wrapper `Array` methods are:
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* `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
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*
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* The wrapper `String` methods are:
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* `replace` and `split`
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*
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* The wrapper methods that support shortcut fusion are:
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* `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
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* `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
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* `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
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*
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* The chainable wrapper methods are:
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* `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
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* `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
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* `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
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* `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
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* `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
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* `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
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* `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
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* `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
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* `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
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* `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
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* `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
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* `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
|
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* `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
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* `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
|
|
* `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
|
|
* `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
|
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* `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
|
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* `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
|
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* `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
|
|
* `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
|
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* `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
|
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* `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
|
|
* `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
|
|
* `zipObject`, `zipObjectDeep`, and `zipWith`
|
|
*
|
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* The wrapper methods that are **not** chainable by default are:
|
|
* `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
|
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* `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
|
|
* `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
|
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* `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
|
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* `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
|
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* `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
|
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* `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
|
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* `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
|
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* `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`,
|
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* `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
|
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* `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
|
|
* `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
|
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* `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
|
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* `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
|
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* `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
|
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* `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
|
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* `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
|
|
* `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
|
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* `upperFirst`, `value`, and `words`
|
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*
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* @name _
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* @constructor
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* @category Seq
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* @param {*} value The value to wrap in a `lodash` instance.
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* @returns {Object} Returns the new `lodash` wrapper instance.
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* @example
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*
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* function square(n) {
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* return n * n;
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* }
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*
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* var wrapped = _([1, 2, 3]);
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*
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* // Returns an unwrapped value.
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* wrapped.reduce(_.add);
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* // => 6
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*
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* // Returns a wrapped value.
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* var squares = wrapped.map(square);
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*
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* _.isArray(squares);
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* // => false
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*
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* _.isArray(squares.value());
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* // => true
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*/
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function lodash(value) {
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return value instanceof LodashWrapper
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? value
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: new LodashWrapper(value);
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}
|
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|
|
/**
|
|
* The base implementation of `_.create` without support for assigning
|
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* properties to the created object.
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*
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* @private
|
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* @param {Object} proto The object to inherit from.
|
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* @returns {Object} Returns the new object.
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|
*/
|
|
var baseCreate = (function() {
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|
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 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;
|
|
}
|
|
|
|
LodashWrapper.prototype = baseCreate(lodash.prototype);
|
|
LodashWrapper.prototype.constructor = LodashWrapper;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
object[key] = value;
|
|
}
|
|
|
|
/**
|
|
* 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 `_.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 `_.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 && !false)
|
|
: comparator(current, computed)
|
|
)) {
|
|
var computed = current,
|
|
result = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* 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();
|
|
|
|
/**
|
|
* 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 `_.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 baseFilter(props, function(key) {
|
|
return isFunction(object[key]);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
return 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 `_.isArguments`.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
|
|
*/
|
|
var baseIsArguments = noop;
|
|
|
|
/**
|
|
* 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 : baseGetTag(object),
|
|
othTag = othIsArr ? arrayTag : baseGetTag(other);
|
|
|
|
objTag = objTag == argsTag ? objectTag : objTag;
|
|
othTag = othTag == argsTag ? objectTag : othTag;
|
|
|
|
var objIsObj = objTag == objectTag,
|
|
othIsObj = othTag == objectTag,
|
|
isSameTag = objTag == othTag;
|
|
|
|
stack || (stack = []);
|
|
var objStack = find(stack, function(entry) {
|
|
return entry[0] == object;
|
|
});
|
|
var othStack = find(stack, function(entry) {
|
|
return entry[0] == other;
|
|
});
|
|
if (objStack && othStack) {
|
|
return objStack[1] == other;
|
|
}
|
|
stack.push([object, other]);
|
|
stack.push([other, object]);
|
|
if (isSameTag && !objIsObj) {
|
|
var result = (objIsArr)
|
|
? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
|
|
: equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
|
|
stack.pop();
|
|
return result;
|
|
}
|
|
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;
|
|
|
|
var result = equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
|
|
stack.pop();
|
|
return result;
|
|
}
|
|
}
|
|
if (!isSameTag) {
|
|
return false;
|
|
}
|
|
var result = equalObjects(object, other, bitmask, customizer, equalFunc, stack);
|
|
stack.pop();
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* 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 `_.iteratee`.
|
|
*
|
|
* @private
|
|
* @param {*} [value=_.identity] The value to convert to an iteratee.
|
|
* @returns {Function} Returns the iteratee.
|
|
*/
|
|
function baseIteratee(func) {
|
|
if (typeof func == 'function') {
|
|
return func;
|
|
}
|
|
if (func == null) {
|
|
return identity;
|
|
}
|
|
return (typeof func == 'object' ? baseMatches : baseProperty)(func);
|
|
}
|
|
|
|
/**
|
|
* 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 props = nativeKeys(source);
|
|
return function(object) {
|
|
var length = props.length;
|
|
if (object == null) {
|
|
return !length;
|
|
}
|
|
object = Object(object);
|
|
while (length--) {
|
|
var key = props[length];
|
|
if (!(key in object &&
|
|
baseIsEqual(source[key], object[key], COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG)
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* 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, props) {
|
|
object = Object(object);
|
|
return reduce(props, function(result, key) {
|
|
if (key in object) {
|
|
result[key] = object[key];
|
|
}
|
|
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 `_.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;
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
return baseSlice(source, 0, source.length);
|
|
}
|
|
|
|
/**
|
|
* 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 `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;
|
|
return reduce(actions, function(result, action) {
|
|
return action.func.apply(action.thisArg, arrayPush([result], action.args));
|
|
}, result);
|
|
}
|
|
|
|
/**
|
|
* 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 = false;
|
|
|
|
var othIsDefined = other !== undefined,
|
|
othIsNull = other === null,
|
|
othIsReflexive = other === other,
|
|
othIsSymbol = false;
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
customizer = (assigner.length > 3 && typeof customizer == 'function')
|
|
? (length--, customizer)
|
|
: undefined;
|
|
|
|
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 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;
|
|
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 `_.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 = baseIteratee(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 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) {
|
|
if (typeof func != 'function') {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
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 fn.apply(isBind ? thisArg : this, args);
|
|
}
|
|
return wrapper;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
var index = -1,
|
|
result = true,
|
|
seen = (bitmask & COMPARE_UNORDERED_FLAG) ? [] : undefined;
|
|
|
|
// Ignore non-index properties.
|
|
while (++index < arrLength) {
|
|
var arrValue = array[index],
|
|
othValue = other[index];
|
|
|
|
var compared;
|
|
if (compared !== undefined) {
|
|
if (compared) {
|
|
continue;
|
|
}
|
|
result = false;
|
|
break;
|
|
}
|
|
// Recursively compare arrays (susceptible to call stack limits).
|
|
if (seen) {
|
|
if (!baseSome(other, function(othValue, othIndex) {
|
|
if (!indexOf(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;
|
|
}
|
|
}
|
|
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 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 + '');
|
|
|
|
}
|
|
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 = keys(object),
|
|
objLength = objProps.length,
|
|
othProps = keys(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;
|
|
}
|
|
}
|
|
var result = true;
|
|
|
|
var skipCtor = isPartial;
|
|
while (++index < objLength) {
|
|
key = objProps[index];
|
|
var objValue = object[key],
|
|
othValue = other[key];
|
|
|
|
var compared;
|
|
// 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;
|
|
}
|
|
}
|
|
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 + '');
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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 func.apply(this, otherArgs);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* 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 = identity;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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) {
|
|
return baseFilter(array, Boolean);
|
|
}
|
|
|
|
/**
|
|
* 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));
|
|
}
|
|
|
|
/**
|
|
* 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, baseIteratee(predicate, 3), index);
|
|
}
|
|
|
|
/**
|
|
* 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) : [];
|
|
}
|
|
|
|
/**
|
|
* 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 (typeof fromIndex == 'number') {
|
|
fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
|
|
} else {
|
|
fromIndex = 0;
|
|
}
|
|
var index = (fromIndex || 0) - 1,
|
|
isReflexive = value === value;
|
|
|
|
while (++index < length) {
|
|
var other = array[index];
|
|
if ((isReflexive ? other === value : other !== other)) {
|
|
return index;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
start = start == null ? 0 : +start;
|
|
end = end === undefined ? length : +end;
|
|
return length ? baseSlice(array, start, end) : [];
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* 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 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__);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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) {
|
|
predicate = guard ? undefined : predicate;
|
|
return baseEvery(collection, baseIteratee(predicate));
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
return baseFilter(collection, baseIteratee(predicate));
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* 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) {
|
|
return baseEach(collection, baseIteratee(iteratee));
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
return baseMap(collection, baseIteratee(iteratee));
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
return baseReduce(collection, baseIteratee(iteratee), accumulator, arguments.length < 3, baseEach);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
collection = isArrayLike(collection) ? collection : nativeKeys(collection);
|
|
return 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) {
|
|
predicate = guard ? undefined : predicate;
|
|
return baseSome(collection, baseIteratee(predicate));
|
|
}
|
|
|
|
/**
|
|
* 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]]
|
|
*/
|
|
function sortBy(collection, iteratee) {
|
|
var index = 0;
|
|
iteratee = baseIteratee(iteratee);
|
|
|
|
return baseMap(baseMap(collection, function(value, key, collection) {
|
|
return { 'value': value, 'index': index++, 'criteria': iteratee(value, key, collection) };
|
|
}).sort(function(object, other) {
|
|
return compareAscending(object.criteria, other.criteria) || (object.index - other.index);
|
|
}), baseProperty('value'));
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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) {
|
|
return createPartial(func, WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG, thisArg, partials);
|
|
});
|
|
|
|
/**
|
|
* 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 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;
|
|
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 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) {
|
|
if (!isObject(value)) {
|
|
return value;
|
|
}
|
|
return isArray(value) ? copyArray(value) : copyObject(value, nativeKeys(value));
|
|
}
|
|
|
|
/**
|
|
* 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 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 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);
|
|
}
|
|
|
|
/**
|
|
* 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 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 = baseIsDate;
|
|
|
|
/**
|
|
* 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 (isArrayLike(value) &&
|
|
(isArray(value) || isString(value) ||
|
|
isFunction(value.splice) || isArguments(value))) {
|
|
return !value.length;
|
|
}
|
|
return !nativeKeys(value).length;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* 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 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 `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 `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 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 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 = baseIsRegExp;
|
|
|
|
/**
|
|
* 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 `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;
|
|
}
|
|
|
|
/**
|
|
* 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 (!isArrayLike(value)) {
|
|
return values(value);
|
|
}
|
|
return value.length ? copyArray(value) : [];
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
var toInteger = Number;
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
var toNumber = Number;
|
|
|
|
/**
|
|
* 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) {
|
|
if (typeof value == 'string') {
|
|
return value;
|
|
}
|
|
return value == null ? '' : (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) {
|
|
copyObject(source, nativeKeys(source), object);
|
|
});
|
|
|
|
/**
|
|
* 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, nativeKeysIn(source), object);
|
|
});
|
|
|
|
/**
|
|
* 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 : assign(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;
|
|
});
|
|
|
|
/**
|
|
* 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 && hasOwnProperty.call(object, path);
|
|
}
|
|
|
|
/**
|
|
* 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']
|
|
*/
|
|
var keys = nativeKeys;
|
|
|
|
/**
|
|
* 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)
|
|
*/
|
|
var keysIn = nativeKeysIn;
|
|
|
|
/**
|
|
* 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);
|
|
});
|
|
|
|
/**
|
|
* 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) {
|
|
var value = object == null ? undefined : object[path];
|
|
if (value === undefined) {
|
|
value = defaultValue;
|
|
}
|
|
return isFunction(value) ? value.call(object) : value;
|
|
}
|
|
|
|
/**
|
|
* 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));
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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, & pebbles'
|
|
*/
|
|
function escape(string) {
|
|
string = toString(string);
|
|
return (string && reHasUnescapedHtml.test(string))
|
|
? string.replace(reUnescapedHtml, escapeHtmlChar)
|
|
: string;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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']
|
|
*/
|
|
var iteratee = baseIteratee;
|
|
|
|
/**
|
|
* 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(assign({}, source));
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
|
|
baseEach(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.
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// Add methods that return wrapped values in chain sequences.
|
|
lodash.assignIn = assignIn;
|
|
lodash.before = before;
|
|
lodash.bind = bind;
|
|
lodash.chain = chain;
|
|
lodash.compact = compact;
|
|
lodash.concat = concat;
|
|
lodash.create = create;
|
|
lodash.defaults = defaults;
|
|
lodash.defer = defer;
|
|
lodash.delay = delay;
|
|
lodash.filter = filter;
|
|
lodash.flatten = flatten;
|
|
lodash.flattenDeep = flattenDeep;
|
|
lodash.iteratee = iteratee;
|
|
lodash.keys = keys;
|
|
lodash.map = map;
|
|
lodash.matches = matches;
|
|
lodash.mixin = mixin;
|
|
lodash.negate = negate;
|
|
lodash.once = once;
|
|
lodash.pick = pick;
|
|
lodash.slice = slice;
|
|
lodash.sortBy = sortBy;
|
|
lodash.tap = tap;
|
|
lodash.thru = thru;
|
|
lodash.toArray = toArray;
|
|
lodash.values = values;
|
|
|
|
// Add aliases.
|
|
lodash.extend = assignIn;
|
|
|
|
// Add methods to `lodash.prototype`.
|
|
mixin(lodash, lodash);
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// Add methods that return unwrapped values in chain sequences.
|
|
lodash.clone = clone;
|
|
lodash.escape = escape;
|
|
lodash.every = every;
|
|
lodash.find = find;
|
|
lodash.forEach = forEach;
|
|
lodash.has = has;
|
|
lodash.head = head;
|
|
lodash.identity = identity;
|
|
lodash.indexOf = indexOf;
|
|
lodash.isArguments = isArguments;
|
|
lodash.isArray = isArray;
|
|
lodash.isBoolean = isBoolean;
|
|
lodash.isDate = isDate;
|
|
lodash.isEmpty = isEmpty;
|
|
lodash.isEqual = isEqual;
|
|
lodash.isFinite = isFinite;
|
|
lodash.isFunction = isFunction;
|
|
lodash.isNaN = isNaN;
|
|
lodash.isNull = isNull;
|
|
lodash.isNumber = isNumber;
|
|
lodash.isObject = isObject;
|
|
lodash.isRegExp = isRegExp;
|
|
lodash.isString = isString;
|
|
lodash.isUndefined = isUndefined;
|
|
lodash.last = last;
|
|
lodash.max = max;
|
|
lodash.min = min;
|
|
lodash.noConflict = noConflict;
|
|
lodash.noop = noop;
|
|
lodash.reduce = reduce;
|
|
lodash.result = result;
|
|
lodash.size = size;
|
|
lodash.some = some;
|
|
lodash.uniqueId = uniqueId;
|
|
|
|
// Add aliases.
|
|
lodash.each = forEach;
|
|
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;
|
|
|
|
// Add `Array` methods to `lodash.prototype`.
|
|
baseEach(['pop', 'join', 'replace', 'reverse', 'split', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
|
|
var func = (/^(?:replace|split)$/.test(methodName) ? String.prototype : arrayProto)[methodName],
|
|
chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
|
|
retUnwrapped = /^(?:pop|join|replace|shift)$/.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);
|
|
});
|
|
};
|
|
});
|
|
|
|
// Add chain sequence methods to the `lodash` wrapper.
|
|
lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
// Some AMD build optimizers, like r.js, check for condition patterns like:
|
|
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
|
|
// 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._ = lodash;
|
|
|
|
// Define as an anonymous module so, through path mapping, it can be
|
|
// referenced as the "underscore" module.
|
|
define(function() {
|
|
return lodash;
|
|
});
|
|
}
|
|
// Check for `exports` after `define` in case a build optimizer adds it.
|
|
else if (freeModule) {
|
|
// Export for Node.js.
|
|
(freeModule.exports = lodash)._ = lodash;
|
|
// Export for CommonJS support.
|
|
freeExports._ = lodash;
|
|
}
|
|
else {
|
|
// Export to the global object.
|
|
root._ = lodash;
|
|
}
|
|
}.call(this));
|