"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "dist/lodash.core.js" between
lodash-4.0.0.tar.gz and lodash-4.17.21.tar.gz

About: lodash is a modern JavaScript utility library delivering modularity, performance, & extras. Tagged version.

lodash.core.js  (lodash-4.0.0):lodash.core.js  (lodash-4.17.21)
/** /**
* @license * @license
* lodash 4.0.0 (Custom Build) <https://lodash.com/> * Lodash (Custom Build) <https://lodash.com/>
* Build: `lodash core -o ./dist/lodash.core.js` * Build: `lodash core -o ./dist/lodash.core.js`
* Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/> * Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE> * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporter * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editor
s & Editors s
* Available under MIT license <https://lodash.com/license>
*/ */
;(function() { ;(function() {
/** Used as a safe reference for `undefined` in pre-ES5 environments. */ /** Used as a safe reference for `undefined` in pre-ES5 environments. */
var undefined; var undefined;
/** Used as the semantic version number. */ /** Used as the semantic version number. */
var VERSION = '4.0.0'; var VERSION = '4.17.21';
/** Used to compose bitmasks for wrapper metadata. */ /** Error message constants. */
var BIND_FLAG = 1,
PARTIAL_FLAG = 32;
/** Used to compose bitmasks for comparison styles. */
var UNORDERED_COMPARE_FLAG = 1,
PARTIAL_COMPARE_FLAG = 2;
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function'; var FUNC_ERROR_TEXT = 'Expected a function';
/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG = 1,
COMPARE_UNORDERED_FLAG = 2;
/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG = 1,
WRAP_PARTIAL_FLAG = 32;
/** Used as references for various `Number` constants. */ /** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991; var INFINITY = 1 / 0,
MAX_SAFE_INTEGER = 9007199254740991;
/** `Object#toString` result references. */ /** `Object#toString` result references. */
var argsTag = '[object Arguments]', var argsTag = '[object Arguments]',
arrayTag = '[object Array]', arrayTag = '[object Array]',
asyncTag = '[object AsyncFunction]',
boolTag = '[object Boolean]', boolTag = '[object Boolean]',
dateTag = '[object Date]', dateTag = '[object Date]',
errorTag = '[object Error]', errorTag = '[object Error]',
funcTag = '[object Function]', funcTag = '[object Function]',
genTag = '[object GeneratorFunction]', genTag = '[object GeneratorFunction]',
numberTag = '[object Number]', numberTag = '[object Number]',
objectTag = '[object Object]', objectTag = '[object Object]',
proxyTag = '[object Proxy]',
regexpTag = '[object RegExp]', regexpTag = '[object RegExp]',
stringTag = '[object String]'; stringTag = '[object String]';
/** Used to match HTML entities and HTML characters. */ /** Used to match HTML entities and HTML characters. */
var reUnescapedHtml = /[&<>"'`]/g, var reUnescapedHtml = /[&<>"']/g,
reHasUnescapedHtml = RegExp(reUnescapedHtml.source); reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
/** Used to detect unsigned integer values. */ /** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/; var reIsUint = /^(?:0|[1-9]\d*)$/;
/** Used to map characters to HTML entities. */ /** Used to map characters to HTML entities. */
var htmlEscapes = { var htmlEscapes = {
'&': '&amp;', '&': '&amp;',
'<': '&lt;', '<': '&lt;',
'>': '&gt;', '>': '&gt;',
'"': '&quot;', '"': '&quot;',
"'": '&#39;', "'": '&#39;'
'`': '&#96;'
}; };
/** Used to determine if values are of the language type `Object`. */
var objectTypes = {
'function': true,
'object': true
};
/** Detect free variable `exports`. */
var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType
) ? exports : null;
/** Detect free variable `module`. */
var freeModule = (objectTypes[typeof module] && module && !module.nodeType) ?
module : null;
/** Detect free variable `global` from Node.js. */ /** Detect free variable `global` from Node.js. */
var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'ob ject' && global); var freeGlobal = typeof global == 'object' && global && global.Object === Obje ct && global;
/** Detect free variable `self`. */ /** Detect free variable `self`. */
var freeSelf = checkGlobal(objectTypes[typeof self] && self); var freeSelf = typeof self == 'object' && self && self.Object === Object && se lf;
/** Detect free variable `window`. */ /** Used as a reference to the global object. */
var freeWindow = checkGlobal(objectTypes[typeof window] && window); var root = freeGlobal || freeSelf || Function('return this')();
/** Detect the popular CommonJS extension `module.exports`. */ /** Detect free variable `exports`. */
var moduleExports = (freeModule && freeModule.exports === freeExports) ? freeE var freeExports = typeof exports == 'object' && exports && !exports.nodeType &
xports : null; & exports;
/** Detect `this` as the global object. */
var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
/** /** Detect free variable `module`. */
* Used as a reference to the global object. var freeModule = freeExports && typeof module == 'object' && module && !module
* .nodeType && module;
* The `this` value is used if it's the global object to avoid Greasemonkey's
* restricted `window` object, otherwise the `window` object is used.
*/
var root = freeGlobal || ((freeWindow !== (thisGlobal && thisGlobal.window)) &
& freeWindow) || freeSelf || thisGlobal || Function('return this')();
/*--------------------------------------------------------------------------*/ /*--------------------------------------------------------------------------*/
/** /**
* Creates a new array concatenating `array` with `other`.
*
* @private
* @param {Array} array The first array to concatenate.
* @param {Array} other The second array to concatenate.
* @returns {Array} Returns the new concatenated array.
*/
function arrayConcat(array, other) {
return arrayPush(copyArray(array), values);
}
/**
* Appends the elements of `values` to `array`. * Appends the elements of `values` to `array`.
* *
* @private * @private
* @param {Array} array The array to modify. * @param {Array} array The array to modify.
* @param {Array} values The values to append. * @param {Array} values The values to append.
* @returns {Array} Returns `array`. * @returns {Array} Returns `array`.
*/ */
function arrayPush(array, values) { function arrayPush(array, values) {
var index = -1, array.push.apply(array, values);
length = values.length,
offset = array.length;
while (++index < length) {
array[offset + index] = values[index];
}
return array; return array;
} }
/** /**
* The base implementation of methods like `_.max` and `_.min` which accepts a * The base implementation of `_.findIndex` and `_.findLastIndex` without
* `comparator` to determine the extremum value. * support for iteratee shorthands.
* *
* @private * @private
* @param {Array} array The array to iterate over. * @param {Array} array The array to inspect.
* @param {Function} iteratee The iteratee invoked per iteration. * @param {Function} predicate The function invoked per iteration.
* @param {Function} comparator The comparator used to compare values. * @param {number} fromIndex The index to search from.
* @returns {*} Returns the extremum value. * @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {number} Returns the index of the matched value, else `-1`.
*/ */
function baseExtremum(array, iteratee, comparator) { function baseFindIndex(array, predicate, fromIndex, fromRight) {
var index = -1, var length = array.length,
length = array.length; index = fromIndex + (fromRight ? 1 : -1);
while (++index < length) {
var value = array[index],
current = iteratee(value);
if (current != null && (computed === undefined while ((fromRight ? index-- : ++index < length)) {
? current === current if (predicate(array[index], index, array)) {
: comparator(current, computed) return index;
)) {
var computed = current,
result = value;
} }
} }
return result; return -1;
} }
/** /**
* The base implementation of methods like `_.find` and `_.findKey`, without * The base implementation of `_.property` without support for deep paths.
* support for iteratee shorthands, which iterates over `collection` using
* the provided `eachFunc`.
* *
* @private * @private
* @param {Array|Object} collection The collection to search. * @param {string} key The key of the property to get.
* @param {Function} predicate The function invoked per iteration. * @returns {Function} Returns the new accessor function.
* @param {Function} eachFunc The function to iterate over `collection`.
* @param {boolean} [retKey] Specify returning the key of the found element in
stead of the element itself.
* @returns {*} Returns the found element or its key, else `undefined`.
*/ */
function baseFind(collection, predicate, eachFunc, retKey) { function baseProperty(key) {
var result; return function(object) {
eachFunc(collection, function(value, key, collection) { return object == null ? undefined : object[key];
if (predicate(value, key, collection)) { };
result = retKey ? key : value; }
return false;
} /**
}); * The base implementation of `_.propertyOf` without support for deep paths.
return result; *
* @private
* @param {Object} object The object to query.
* @returns {Function} Returns the new accessor function.
*/
function basePropertyOf(object) {
return function(key) {
return object == null ? undefined : object[key];
};
} }
/** /**
* The base implementation of `_.reduce` and `_.reduceRight`, without support * The base implementation of `_.reduce` and `_.reduceRight`, without support
* for iteratee shorthands, which iterates over `collection` using the provide * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
d
* `eachFunc`.
* *
* @private * @private
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration. * @param {Function} iteratee The function invoked per iteration.
* @param {*} accumulator The initial value. * @param {*} accumulator The initial value.
* @param {boolean} initFromCollection Specify using the first or last element * @param {boolean} initAccum Specify using the first or last element of
of `collection` as the initial value. * `collection` as the initial value.
* @param {Function} eachFunc The function to iterate over `collection`. * @param {Function} eachFunc The function to iterate over `collection`.
* @returns {*} Returns the accumulated value. * @returns {*} Returns the accumulated value.
*/ */
function baseReduce(collection, iteratee, accumulator, initFromCollection, eac hFunc) { function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
eachFunc(collection, function(value, index, collection) { eachFunc(collection, function(value, index, collection) {
accumulator = initFromCollection accumulator = initAccum
? (initFromCollection = false, value) ? (initAccum = false, value)
: iteratee(accumulator, value, index, collection); : iteratee(accumulator, value, index, collection);
}); });
return accumulator; return accumulator;
} }
/** /**
* The base implementation of `_.times` without support for iteratee shorthand
s
* or max array length checks.
*
* @private
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the array of results.
*/
function baseTimes(n, iteratee) {
var index = -1,
result = Array(n);
while (++index < n) {
result[index] = iteratee(index);
}
return result;
}
/**
* The base implementation of `_.values` and `_.valuesIn` which creates an * The base implementation of `_.values` and `_.valuesIn` which creates an
* array of `object` property values corresponding to the property names * array of `object` property values corresponding to the property names
* of `props`. * of `props`.
* *
* @private * @private
* @param {Object} object The object to query. * @param {Object} object The object to query.
* @param {Array} props The property names to get values for. * @param {Array} props The property names to get values for.
* @returns {Object} Returns the array of property values. * @returns {Object} Returns the array of property values.
*/ */
function baseValues(object, props) { function baseValues(object, props) {
return baseMap(props, function(key) { return baseMap(props, function(key) {
return object[key]; return object[key];
}); });
} }
/** /**
* Checks if `value` is a global object.
*
* @private
* @param {*} value The value to check.
* @returns {null|Object} Returns `value` if it's a global object, else `null`
.
*/
function checkGlobal(value) {
return (value && value.Object === Object) ? value : null;
}
/**
* 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 valIsNull = value === null,
valIsUndef = value === undefined,
valIsReflexive = value === value;
var othIsNull = other === null,
othIsUndef = other === undefined,
othIsReflexive = other === other;
if ((value > other && !othIsNull) || !valIsReflexive ||
(valIsNull && !othIsUndef && othIsReflexive) ||
(valIsUndef && othIsReflexive)) {
return 1;
}
if ((value < other && !valIsNull) || !othIsReflexive ||
(othIsNull && !valIsUndef && valIsReflexive) ||
(othIsUndef && valIsReflexive)) {
return -1;
}
}
return 0;
}
/**
* Used by `_.escape` to convert characters to HTML entities. * Used by `_.escape` to convert characters to HTML entities.
* *
* @private * @private
* @param {string} chr The matched character to escape. * @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character. * @returns {string} Returns the escaped character.
*/ */
function escapeHtmlChar(chr) { var escapeHtmlChar = basePropertyOf(htmlEscapes);
return htmlEscapes[chr];
}
/**
* Checks if `value` is a host object in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a host object, else `false`
.
*/
function isHostObject(value) {
// Many host objects are `Object` objects that can coerce to strings
// despite having improperly defined `toString` methods.
var result = false;
if (value != null && typeof value.toString != 'function') {
try {
result = !!(value + '');
} catch (e) {}
}
return result;
}
/**
* 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) {
value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
length = length == null ? MAX_SAFE_INTEGER : length;
return value > -1 && value % 1 == 0 && value < length;
}
/** /**
* Converts `iterator` to an array. * Creates a unary function that invokes `func` with its argument transformed.
* *
* @private * @private
* @param {Object} iterator The iterator to convert. * @param {Function} func The function to wrap.
* @returns {Array} Returns the converted array. * @param {Function} transform The argument transform.
* @returns {Function} Returns the new function.
*/ */
function iteratorToArray(iterator) { function overArg(func, transform) {
var data, return function(arg) {
result = []; return func(transform(arg));
};
while (!(data = iterator.next()).done) {
result.push(data.value);
}
return result;
} }
/*--------------------------------------------------------------------------*/ /*--------------------------------------------------------------------------*/
/** Used for built-in method references. */ /** Used for built-in method references. */
var arrayProto = Array.prototype, var arrayProto = Array.prototype,
objectProto = Object.prototype; objectProto = Object.prototype;
/** Used to check objects for own properties. */ /** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty; var hasOwnProperty = objectProto.hasOwnProperty;
/** Used to generate unique IDs. */ /** Used to generate unique IDs. */
var idCounter = 0; var idCounter = 0;
/** /**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/ * Used to resolve the
6.0/#sec-object.prototype.tostring) * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prot
otype.tostring)
* of values. * of values.
*/ */
var objectToString = objectProto.toString; var nativeObjectToString = objectProto.toString;
/** Used to restore the original `_` reference in `_.noConflict`. */ /** Used to restore the original `_` reference in `_.noConflict`. */
var oldDash = root._; var oldDash = root._;
/** Built-in value references. */ /** Built-in value references. */
var _Symbol = root.Symbol, var objectCreate = Object.create,
Reflect = root.Reflect,
Uint8Array = root.Uint8Array,
enumerate = Reflect ? Reflect.enumerate : undefined,
propertyIsEnumerable = objectProto.propertyIsEnumerable; propertyIsEnumerable = objectProto.propertyIsEnumerable;
/* Built-in method references for those with the same name as other `lodash` m ethods. */ /* Built-in method references for those with the same name as other `lodash` m ethods. */
var nativeIsFinite = root.isFinite, var nativeIsFinite = root.isFinite,
nativeKeys = Object.keys, nativeKeys = overArg(Object.keys, Object),
nativeMax = Math.max; nativeMax = Math.max;
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Creates a `lodash` object which wraps `value` to enable implicit method * Creates a `lodash` object which wraps `value` to enable implicit method
* chaining. Methods that operate on and return arrays, collections, and * chain sequences. Methods that operate on and return arrays, collections,
* functions can be chained together. Methods that retrieve a single value or * and functions can be chained together. Methods that retrieve a single value
* may return a primitive value will automatically end the chain sequence and * or may return a primitive value will automatically end the chain sequence
* return the unwrapped value. Otherwise, the value must be unwrapped with * and return the unwrapped value. Otherwise, the value must be unwrapped
* `_#value`. * with `_#value`.
* *
* Explicit chaining, which must be unwrapped with `_#value` in all cases, * Explicit chain sequences, which must be unwrapped with `_#value`, may be
* may be enabled using `_.chain`. * enabled using `_.chain`.
* *
* The execution of chained methods is lazy, that is, it's deferred until * The execution of chained methods is lazy, that is, it's deferred until
* `_#value` is implicitly or explicitly called. * `_#value` is implicitly or explicitly called.
* *
* Lazy evaluation allows several methods to support shortcut fusion. Shortcut * Lazy evaluation allows several methods to support shortcut fusion.
* fusion is an optimization to merge iteratee calls; this avoids the creation * Shortcut fusion is an optimization to merge iteratee calls; this avoids
* of intermediate arrays and can greatly reduce the number of iteratee execut * the creation of intermediate arrays and can greatly reduce the number of
ions. * iteratee executions. Sections of a chain sequence qualify for shortcut
* Sections of a chain sequence qualify for shortcut fusion if the section is * fusion if the section is applied to an array and iteratees accept only
* applied to an array of at least two hundred elements and any iteratees * one argument. The heuristic for whether a section qualifies for shortcut
* accept only one argument. The heuristic for whether a section qualifies * fusion is subject to change.
* for shortcut fusion is subject to change.
* *
* Chaining is supported in custom builds as long as the `_#value` method is * Chaining is supported in custom builds as long as the `_#value` method is
* directly or indirectly included in the build. * directly or indirectly included in the build.
* *
* In addition to lodash methods, wrappers have `Array` and `String` methods. * In addition to lodash methods, wrappers have `Array` and `String` methods.
* *
* The wrapper `Array` methods are: * The wrapper `Array` methods are:
* `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift` * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
* *
* The wrapper `String` methods are: * The wrapper `String` methods are:
* `replace` and `split` * `replace` and `split`
* *
* The wrapper methods that support shortcut fusion are: * The wrapper methods that support shortcut fusion are:
* `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`, * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
* `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`, * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
* `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray` * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
* *
* The chainable wrapper methods are: * The chainable wrapper methods are:
* `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
* `at`, `before`, `bind`, `bindAll`, `bindKey`, `chain`, `chunk`, `commit`, * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
* `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`, `curry`, * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
* `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`, `difference`, * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
* `differenceBy`, `differenceWith`, `drop`, `dropRight`, `dropRightWhile`, * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
* `dropWhile`, `fill`, `filter`, `flatten`, `flattenDeep`, `flip`, `flow`, * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
* `flowRight`, `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
* `forOwnRight`, `fromPairs`, `functions`, `functionsIn`, `groupBy`, `initial * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
`, * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
* `intersection`, `intersectionBy`, `intersectionWith`, invert`, `invokeMap`, * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
* `iteratee`, `keyBy`, `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesPropert
* `matches`, `matchesProperty`, `memoize`, `merge`, `mergeWith`, `method`, y`,
* `methodOf`, `mixin`, `negate`, `nthArg`, `omit`, `omitBy`, `once`, `orderBy * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
`, * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
* `over`, `overArgs`, `overEvery`, `overSome`, `partial`, `partialRight`, * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
* `partition`, `pick`, `pickBy`, `plant`, `property`, `propertyOf`, `pull`, * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`
* `pullAll`, `pullAllBy`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, ,
* `reject`, `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
* `shuffle`, `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
* `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
* `toArray`, `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
* `unary`, `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
* `unset`, `unshift`, `unzip`, `unzipWith`, `values`, `valuesIn`, `without`, * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
* `wrap`, `xor`, `xorBy`, `xorWith`, `zip`, `zipObject`, and `zipWith` * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
* `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
* `zipObject`, `zipObjectDeep`, and `zipWith`
* *
* The wrapper methods that are **not** chainable by default are: * The wrapper methods that are **not** chainable by default are:
* `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`, * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
* `cloneDeep`, `cloneDeepWith`, `cloneWith`, `deburr`, `endsWith`, `eq`, * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
* `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
* `findLast`, `findLastIndex`, `findLastKey`, `floor`, `get`, `gt`, `gte`, * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
* `has`, `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`
* `invoke`, `isArguments`, `isArray`, `isArrayLike`, `isArrayLikeObject`, ,
* `isBoolean`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`, * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
* `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMatch`, * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
* `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`, * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObjec
* `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, `isSafeInteger`, t`,
* `isString`, `isUndefined`, `isTypedArray`, `join`, `kebabCase`, `last`, * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
* `lastIndexOf`, `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`
* `mean`, `min`, `minBy`, `noConflict`, `noop`, `now`, `pad`, `padEnd`, ,
* `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, `repeat`, * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
* `result`, `round`, `runInContext`, `sample`, `shift`, `size`, `snakeCase`, * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
* `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`, `sortedLastIndex * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
By`, * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
* `startCase`, `startsWith`, `subtract`, `sum`, sumBy`, `template`, `times`, * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
* `toLower`, `toInteger`, `toLength`, `toNumber`, `toSafeInteger`, toString`, * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
* `toUpper`, `trim`, `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueI * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
d`, * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
* `upperCase`, `upperFirst`, `value`, and `words` * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
* `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
* `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
* `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
* `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
* `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
* `upperFirst`, `value`, and `words`
* *
* @name _ * @name _
* @constructor * @constructor
* @category Seq * @category Seq
* @param {*} value The value to wrap in a `lodash` instance. * @param {*} value The value to wrap in a `lodash` instance.
* @returns {Object} Returns the new `lodash` wrapper instance. * @returns {Object} Returns the new `lodash` wrapper instance.
* @example * @example
* *
* function square(n) { * function square(n) {
* return n * n; * return n * n;
* } * }
* *
* var wrapped = _([1, 2, 3]); * var wrapped = _([1, 2, 3]);
* *
* // returns an unwrapped value * // Returns an unwrapped value.
* wrapped.reduce(_.add); * wrapped.reduce(_.add);
* // => 6 * // => 6
* *
* // returns a wrapped value * // Returns a wrapped value.
* var squares = wrapped.map(square); * var squares = wrapped.map(square);
* *
* _.isArray(squares); * _.isArray(squares);
* // => false * // => false
* *
* _.isArray(squares.value()); * _.isArray(squares.value());
* // => true * // => true
*/ */
function lodash(value) { function lodash(value) {
if (isObjectLike(value) && !isArray(value)) { return value instanceof LodashWrapper
if (value instanceof LodashWrapper) { ? value
return value; : new LodashWrapper(value);
}
if (hasOwnProperty.call(value, '__wrapped__')) {
return wrapperClone(value);
}
}
return new LodashWrapper(value);
} }
/** /**
* The base implementation of `_.create` without support for assigning
* properties to the created object.
*
* @private
* @param {Object} proto The object to inherit from.
* @returns {Object} Returns the new object.
*/
var baseCreate = (function() {
function object() {}
return function(proto) {
if (!isObject(proto)) {
return {};
}
if (objectCreate) {
return objectCreate(proto);
}
object.prototype = proto;
var result = new object;
object.prototype = undefined;
return result;
};
}());
/**
* The base constructor for creating `lodash` wrapper objects. * The base constructor for creating `lodash` wrapper objects.
* *
* @private * @private
* @param {*} value The value to wrap. * @param {*} value The value to wrap.
* @param {boolean} [chainAll] Enable chaining for all wrapper methods. * @param {boolean} [chainAll] Enable explicit method chain sequences.
*/ */
function LodashWrapper(value, chainAll) { function LodashWrapper(value, chainAll) {
this.__wrapped__ = value; this.__wrapped__ = value;
this.__actions__ = []; this.__actions__ = [];
this.__chain__ = !!chainAll; this.__chain__ = !!chainAll;
} }
/*------------------------------------------------------------------------*/ LodashWrapper.prototype = baseCreate(lodash.prototype);
LodashWrapper.prototype.constructor = LodashWrapper;
/** /*------------------------------------------------------------------------*/
* Used by `_.defaults` to customize its `_.assignIn` use.
*
* @private
* @param {*} objValue The destination value.
* @param {*} srcValue The source value.
* @param {string} key The key of the property to assign.
* @param {Object} object The parent object of `objValue`.
* @returns {*} Returns the value to assign.
*/
function assignInDefaults(objValue, srcValue, key, object) {
if (objValue === undefined ||
(eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
return srcValue;
}
return objValue;
}
/** /**
* Assigns `value` to `key` of `object` if the existing value is not equivalen t * Assigns `value` to `key` of `object` if the existing value is not equivalen t
* using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-sam evaluezero) * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-sam evaluezero)
* for equality comparisons. * for equality comparisons.
* *
* @private * @private
* @param {Object} object The object to modify. * @param {Object} object The object to modify.
* @param {string} key The key of the property to assign. * @param {string} key The key of the property to assign.
* @param {*} value The value to assign. * @param {*} value The value to assign.
*/ */
function assignValue(object, key, value) { function assignValue(object, key, value) {
var objValue = object[key]; var objValue = object[key];
if ((!eq(objValue, value) || if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
(eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key)))
||
(value === undefined && !(key in object))) { (value === undefined && !(key in object))) {
object[key] = value; baseAssignValue(object, key, value);
} }
} }
/** /**
* The base implementation of `_.create` without support for assigning * The base implementation of `assignValue` and `assignMergeValue` without
* properties to the created object. * value checks.
* *
* @private * @private
* @param {Object} prototype The object to inherit from. * @param {Object} object The object to modify.
* @returns {Object} Returns the new object. * @param {string} key The key of the property to assign.
* @param {*} value The value to assign.
*/ */
var baseCreate = (function() { function baseAssignValue(object, key, value) {
function object() {} object[key] = value;
return function(prototype) { }
if (isObject(prototype)) {
object.prototype = prototype;
var result = new object;
object.prototype = undefined;
}
return result || {};
};
}());
/** /**
* The base implementation of `_.delay` and `_.defer` which accepts an array * The base implementation of `_.delay` and `_.defer` which accepts `args`
* of `func` arguments. * to provide to `func`.
* *
* @private * @private
* @param {Function} func The function to delay. * @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation. * @param {number} wait The number of milliseconds to delay invocation.
* @param {Object} args The arguments provide to `func`. * @param {Array} args The arguments to provide to `func`.
* @returns {number} Returns the timer id. * @returns {number|Object} Returns the timer id or timeout object.
*/ */
function baseDelay(func, wait, args) { function baseDelay(func, wait, args) {
if (typeof func != 'function') { if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT); throw new TypeError(FUNC_ERROR_TEXT);
} }
return setTimeout(function() { func.apply(undefined, args); }, wait); return setTimeout(function() { func.apply(undefined, args); }, wait);
} }
/** /**
* The base implementation of `_.forEach` without support for iteratee shortha nds. * The base implementation of `_.forEach` without support for iteratee shortha nds.
skipping to change at line 605 skipping to change at line 466
* @returns {Array|Object} Returns `collection`. * @returns {Array|Object} Returns `collection`.
*/ */
var baseEach = createBaseEach(baseForOwn); var baseEach = createBaseEach(baseForOwn);
/** /**
* The base implementation of `_.every` without support for iteratee shorthand s. * The base implementation of `_.every` without support for iteratee shorthand s.
* *
* @private * @private
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration. * @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if all elements pass the predicate check, * @returns {boolean} Returns `true` if all elements pass the predicate check,
else `false` * else `false`
*/ */
function baseEvery(collection, predicate) { function baseEvery(collection, predicate) {
var result = true; var result = true;
baseEach(collection, function(value, index, collection) { baseEach(collection, function(value, index, collection) {
result = !!predicate(value, index, collection); result = !!predicate(value, index, collection);
return result; return result;
}); });
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 shorthan ds. * The base implementation of `_.filter` without support for iteratee shorthan ds.
* *
* @private * @private
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration. * @param {Function} predicate The function invoked per iteration.
* @returns {Array} Returns the new filtered array. * @returns {Array} Returns the new filtered array.
*/ */
function baseFilter(collection, predicate) { function baseFilter(collection, predicate) {
var result = []; var result = [];
baseEach(collection, function(value, index, collection) { baseEach(collection, function(value, index, collection) {
skipping to change at line 639 skipping to change at line 530
} }
}); });
return result; return result;
} }
/** /**
* The base implementation of `_.flatten` with support for restricting flatten ing. * The base implementation of `_.flatten` with support for restricting flatten ing.
* *
* @private * @private
* @param {Array} array The array to flatten. * @param {Array} array The array to flatten.
* @param {boolean} [isDeep] Specify a deep flatten. * @param {number} depth The maximum recursion depth.
* @param {boolean} [isStrict] Restrict flattening to arrays-like objects. * @param {boolean} [predicate=isFlattenable] The function invoked per iterati
on.
* @param {boolean} [isStrict] Restrict to values that pass `predicate` checks
.
* @param {Array} [result=[]] The initial result value. * @param {Array} [result=[]] The initial result value.
* @returns {Array} Returns the new flattened array. * @returns {Array} Returns the new flattened array.
*/ */
function baseFlatten(array, isDeep, isStrict, result) { function baseFlatten(array, depth, predicate, isStrict, result) {
result || (result = []);
var index = -1, var index = -1,
length = array.length; length = array.length;
predicate || (predicate = isFlattenable);
result || (result = []);
while (++index < length) { while (++index < length) {
var value = array[index]; var value = array[index];
if (isArrayLikeObject(value) && if (depth > 0 && predicate(value)) {
(isStrict || isArray(value) || isArguments(value))) { if (depth > 1) {
if (isDeep) {
// Recursively flatten arrays (susceptible to call stack limits). // Recursively flatten arrays (susceptible to call stack limits).
baseFlatten(value, isDeep, isStrict, result); baseFlatten(value, depth - 1, predicate, isStrict, result);
} else { } else {
arrayPush(result, value); arrayPush(result, value);
} }
} else if (!isStrict) { } else if (!isStrict) {
result[result.length] = value; result[result.length] = value;
} }
} }
return result; return result;
} }
/** /**
* The base implementation of `baseForIn` and `baseForOwn` which iterates * The base implementation of `baseForOwn` which iterates over `object`
* over `object` properties returned by `keysFunc` invoking `iteratee` for * properties returned by `keysFunc` and invokes `iteratee` for each property.
* each property. Iteratee functions may exit iteration early by explicitly * Iteratee functions may exit iteration early by explicitly returning `false`
* returning `false`. .
* *
* @private * @private
* @param {Object} object The object to iterate over. * @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration. * @param {Function} iteratee The function invoked per iteration.
* @param {Function} keysFunc The function to get the keys of `object`. * @param {Function} keysFunc The function to get the keys of `object`.
* @returns {Object} Returns `object`. * @returns {Object} Returns `object`.
*/ */
var baseFor = createBaseFor(); var baseFor = createBaseFor();
/** /**
skipping to change at line 695 skipping to change at line 586
* @param {Object} object The object to iterate over. * @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration. * @param {Function} iteratee The function invoked per iteration.
* @returns {Object} Returns `object`. * @returns {Object} Returns `object`.
*/ */
function baseForOwn(object, iteratee) { function baseForOwn(object, iteratee) {
return object && baseFor(object, iteratee, keys); return object && baseFor(object, iteratee, keys);
} }
/** /**
* The base implementation of `_.functions` which creates an array of * The base implementation of `_.functions` which creates an array of
* `object` function property names filtered from those provided. * `object` function property names filtered from `props`.
* *
* @private * @private
* @param {Object} object The object to inspect. * @param {Object} object The object to inspect.
* @param {Array} props The property names to filter. * @param {Array} props The property names to filter.
* @returns {Array} Returns the new array of filtered property names. * @returns {Array} Returns the function names.
*/ */
function baseFunctions(object, props) { function baseFunctions(object, props) {
return baseFilter(props, function(key) { return baseFilter(props, function(key) {
return isFunction(object[key]); return isFunction(object[key]);
}); });
} }
/** /**
* The base implementation of `getTag` without fallbacks for buggy environment
s.
*
* @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 * The base implementation of `_.isEqual` which supports partial comparisons
* and tracks traversed objects. * and tracks traversed objects.
* *
* @private * @private
* @param {*} value The value to compare. * @param {*} value The value to compare.
* @param {*} other The other 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 {Function} [customizer] The function to customize comparisons.
* @param {boolean} [bitmask] The bitmask of comparison flags.
* The bitmask may be composed of the following flags:
* 1 - Unordered comparison
* 2 - Partial comparison
* @param {Object} [stack] Tracks traversed `value` and `other` objects. * @param {Object} [stack] Tracks traversed `value` and `other` objects.
* @returns {boolean} Returns `true` if the values are equivalent, else `false `. * @returns {boolean} Returns `true` if the values are equivalent, else `false `.
*/ */
function baseIsEqual(value, other, customizer, bitmask, stack) { function baseIsEqual(value, other, bitmask, customizer, stack) {
if (value === other) { if (value === other) {
return true; return true;
} }
if (value == null || other == null || (!isObject(value) && !isObjectLike(oth er))) { if (value == null || other == null || (!isObjectLike(value) && !isObjectLike (other))) {
return value !== value && other !== other; return value !== value && other !== other;
} }
return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack ); return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack );
} }
/** /**
* A specialized version of `baseIsEqual` for arrays and objects which perform s * A specialized version of `baseIsEqual` for arrays and objects which perform s
* deep comparisons and tracks traversed objects enabling objects with circula r * deep comparisons and tracks traversed objects enabling objects with circula r
* references to be compared. * references to be compared.
* *
* @private * @private
* @param {Object} object The object to compare. * @param {Object} object The object to compare.
* @param {Object} other The other object to compare. * @param {Object} other The other object to compare.
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more detai
ls.
* @param {Function} customizer The function to customize comparisons.
* @param {Function} equalFunc The function to determine equivalents of values . * @param {Function} equalFunc The function to determine equivalents of values .
* @param {Function} [customizer] The function to customize comparisons.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual
` for more details.
* @param {Object} [stack] Tracks traversed `object` and `other` objects. * @param {Object} [stack] Tracks traversed `object` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `fals e`. * @returns {boolean} Returns `true` if the objects are equivalent, else `fals e`.
*/ */
function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) { function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
var objIsArr = isArray(object), var objIsArr = isArray(object),
othIsArr = isArray(other), othIsArr = isArray(other),
objTag = arrayTag, objTag = objIsArr ? arrayTag : baseGetTag(object),
othTag = arrayTag; othTag = othIsArr ? arrayTag : baseGetTag(other);
if (!objIsArr) { objTag = objTag == argsTag ? objectTag : objTag;
objTag = objectToString.call(object); othTag = othTag == argsTag ? objectTag : othTag;
if (objTag == argsTag) {
objTag = objectTag; var objIsObj = objTag == objectTag,
} othIsObj = othTag == objectTag,
}
if (!othIsArr) {
othTag = objectToString.call(other);
if (othTag == argsTag) {
othTag = objectTag;
}
}
var objIsObj = objTag == objectTag && !isHostObject(object),
othIsObj = othTag == objectTag && !isHostObject(other),
isSameTag = objTag == othTag; isSameTag = objTag == othTag;
if (isSameTag && !(objIsArr || objIsObj)) { stack || (stack = []);
return equalByTag(object, other, objTag, equalFunc, customizer, bitmask); 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;
} }
var isPartial = bitmask & PARTIAL_COMPARE_FLAG; stack.push([object, other]);
if (!isPartial) { stack.push([other, object]);
if (isSameTag && !objIsObj) {
var result = (objIsArr)
? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
: equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stac
k);
stack.pop();
return result;
}
if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
if (objIsWrapped || othIsWrapped) { if (objIsWrapped || othIsWrapped) {
return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? var objUnwrapped = objIsWrapped ? object.value() : object,
other.value() : other, customizer, bitmask, stack); othUnwrapped = othIsWrapped ? other.value() : other;
var result = equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer,
stack);
stack.pop();
return result;
} }
} }
if (!isSameTag) { if (!isSameTag) {
return false; return false;
} }
stack || (stack = []); var result = equalObjects(object, other, bitmask, customizer, equalFunc, sta
var stacked = find(stack, function(entry) { ck);
return entry[0] === object;
});
if (stacked && stacked[1]) {
return stacked[1] == other;
}
stack.push([object, other]);
var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFu
nc, customizer, bitmask, stack);
stack.pop(); stack.pop();
return result; return result;
} }
/** /**
* The base implementation of `_.iteratee`. * The base implementation of `_.isRegExp` without Node.js optimizations.
* *
* @private * @private
* @param {*} [value=_.identity] The value to convert to an iteratee. * @param {*} value The value to check.
* @returns {Function} Returns the iteratee. * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
*/ */
function baseIteratee(func) { function baseIsRegExp(value) {
var type = typeof func; return isObjectLike(value) && baseGetTag(value) == regexpTag;
if (type == 'function') {
return func;
}
return func == null
? identity
: (type == 'object' ? baseMatches : baseProperty)(func);
} }
/** /**
* The base implementation of `_.keys` which doesn't skip the constructor * The base implementation of `_.iteratee`.
* property of prototypes or treat sparse arrays as dense.
* *
* @private * @private
* @type Function * @param {*} [value=_.identity] The value to convert to an iteratee.
* @param {Object} object The object to query. * @returns {Function} Returns the iteratee.
* @returns {Array} Returns the array of property names.
*/ */
function baseKeys(object) { function baseIteratee(func) {
return nativeKeys(Object(object)); if (typeof func == 'function') {
return func;
}
if (func == null) {
return identity;
}
return (typeof func == 'object' ? baseMatches : baseProperty)(func);
} }
/** /**
* The base implementation of `_.keysIn` which doesn't skip the constructor * The base implementation of `_.lt` which doesn't coerce arguments.
* property of prototypes or treat sparse arrays as dense.
* *
* @private * @private
* @param {Object} object The object to query. * @param {*} value The value to compare.
* @returns {Array} Returns the array of property names. * @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than `other`,
* else `false`.
*/ */
function baseKeysIn(object) { function baseLt(value, other) {
object = object == null ? object : Object(object); return value < other;
var result = [];
for (var key in object) {
result.push(key);
}
return result;
}
// Fallback for IE < 9 with es6-shim.
if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
baseKeysIn = function(object) {
return iteratorToArray(enumerate(object));
};
} }
/** /**
* The base implementation of `_.map` without support for iteratee shorthands. * The base implementation of `_.map` without support for iteratee shorthands.
* *
* @private * @private
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration. * @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array. * @returns {Array} Returns the new mapped array.
*/ */
skipping to change at line 875 skipping to change at line 798
result[++index] = iteratee(value, key, collection); result[++index] = iteratee(value, key, collection);
}); });
return result; return result;
} }
/** /**
* The base implementation of `_.matches` which doesn't clone `source`. * The base implementation of `_.matches` which doesn't clone `source`.
* *
* @private * @private
* @param {Object} source The object of property values to match. * @param {Object} source The object of property values to match.
* @returns {Function} Returns the new function. * @returns {Function} Returns the new spec function.
*/ */
function baseMatches(source) { function baseMatches(source) {
var props = keys(source), var props = nativeKeys(source);
length = props.length;
return function(object) { return function(object) {
var length = props.length;
if (object == null) { if (object == null) {
return !length; return !length;
} }
object = Object(object); object = Object(object);
while (length--) { while (length--) {
var key = props[length]; var key = props[length];
if (!(key in object && baseIsEqual(source[key], object[key], undefined, if (!(key in object &&
true))) { baseIsEqual(source[key], object[key], COMPARE_PARTIAL_FLAG | COMPA
RE_UNORDERED_FLAG)
)) {
return false; return false;
} }
} }
return true; return true;
}; };
} }
/** /**
* The base implementation of `_.pick` without support for individual * The base implementation of `_.pick` without support for individual
* property names. * property identifiers.
* *
* @private * @private
* @param {Object} object The source object. * @param {Object} object The source object.
* @param {string[]} props The property names to pick. * @param {string[]} paths The property paths to pick.
* @returns {Object} Returns the new object. * @returns {Object} Returns the new object.
*/ */
function basePick(object, props) { function basePick(object, props) {
object = Object(object); object = Object(object);
return reduce(props, function(result, key) { return reduce(props, function(result, key) {
if (key in object) { if (key in object) {
result[key] = object[key]; result[key] = object[key];
} }
return result; return result;
}, {}); }, {});
} }
/** /**
* The base implementation of `_.property` without support for deep paths. * The base implementation of `_.rest` which doesn't validate or coerce argume nts.
* *
* @private * @private
* @param {string} key The key of the property to get. * @param {Function} func The function to apply a rest parameter to.
* @param {number} [start=func.length-1] The start position of the rest parame
ter.
* @returns {Function} Returns the new function. * @returns {Function} Returns the new function.
*/ */
function baseProperty(key) { function baseRest(func, start) {
return function(object) { return setToString(overRest(func, start, identity), func + '');
return object == null ? undefined : object[key];
};
} }
/** /**
* The base implementation of `_.slice` without an iteratee call guard. * The base implementation of `_.slice` without an iteratee call guard.
* *
* @private * @private
* @param {Array} array The array to slice. * @param {Array} array The array to slice.
* @param {number} [start=0] The start position. * @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position. * @param {number} [end=array.length] The end position.
* @returns {Array} Returns the slice of `array`. * @returns {Array} Returns the slice of `array`.
skipping to change at line 976 skipping to change at line 899
function copyArray(source) { function copyArray(source) {
return baseSlice(source, 0, source.length); return baseSlice(source, 0, source.length);
} }
/** /**
* The base implementation of `_.some` without support for iteratee shorthands . * The base implementation of `_.some` without support for iteratee shorthands .
* *
* @private * @private
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration. * @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if any element passes the predicate check * @returns {boolean} Returns `true` if any element passes the predicate check
, else `false`. ,
* else `false`.
*/ */
function baseSome(collection, predicate) { function baseSome(collection, predicate) {
var result; var result;
baseEach(collection, function(value, index, collection) { baseEach(collection, function(value, index, collection) {
result = predicate(value, index, collection); result = predicate(value, index, collection);
return !result; return !result;
}); });
return !!result; return !!result;
} }
skipping to change at line 1006 skipping to change at line 930
* @returns {*} Returns the resolved value. * @returns {*} Returns the resolved value.
*/ */
function baseWrapperValue(value, actions) { function baseWrapperValue(value, actions) {
var result = value; var result = value;
return reduce(actions, function(result, action) { return reduce(actions, function(result, action) {
return action.func.apply(action.thisArg, arrayPush([result], action.args)) ; return action.func.apply(action.thisArg, arrayPush([result], action.args)) ;
}, result); }, result);
} }
/** /**
* Copies properties of `source` to `object`. * Compares values to sort them in ascending order.
* *
* @private * @private
* @param {Object} source The object to copy properties from. * @param {*} value The value to compare.
* @param {Array} props The property names to copy. * @param {*} other The other value to compare.
* @param {Object} [object={}] The object to copy properties to. * @returns {number} Returns the sort order indicator for `value`.
* @returns {Object} Returns `object`.
*/ */
var copyObject = copyObjectWith; 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 && !othIs
Symbol) ||
(valIsNull && othIsDefined && othIsReflexive) ||
(!valIsDefined && othIsReflexive) ||
!valIsReflexive) {
return 1;
}
if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
(othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIs
Symbol) ||
(othIsNull && valIsDefined && valIsReflexive) ||
(!othIsDefined && valIsReflexive) ||
!othIsReflexive) {
return -1;
}
}
return 0;
}
/** /**
* This function is like `copyObject` except that it accepts a function to * Copies properties of `source` to `object`.
* customize copied values.
* *
* @private * @private
* @param {Object} source The object to copy properties from. * @param {Object} source The object to copy properties from.
* @param {Array} props The property names to copy. * @param {Array} props The property identifiers to copy.
* @param {Object} [object={}] The object to copy properties to. * @param {Object} [object={}] The object to copy properties to.
* @param {Function} [customizer] The function to customize copied values. * @param {Function} [customizer] The function to customize copied values.
* @returns {Object} Returns `object`. * @returns {Object} Returns `object`.
*/ */
function copyObjectWith(source, props, object, customizer) { function copyObject(source, props, object, customizer) {
var isNew = !object;
object || (object = {}); object || (object = {});
var index = -1, var index = -1,
length = props.length; length = props.length;
while (++index < length) { while (++index < length) {
var key = props[index], var key = props[index];
newValue = customizer ? customizer(object[key], source[key], key, obje
ct, source) : source[key];
assignValue(object, key, newValue); 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; return object;
} }
/** /**
* Creates a function like `_.assign`. * Creates a function like `_.assign`.
* *
* @private * @private
* @param {Function} assigner The function to assign values. * @param {Function} assigner The function to assign values.
* @returns {Function} Returns the new assigner function. * @returns {Function} Returns the new assigner function.
*/ */
function createAssigner(assigner) { function createAssigner(assigner) {
return rest(function(object, sources) { return baseRest(function(object, sources) {
var index = -1, var index = -1,
length = sources.length, length = sources.length,
customizer = length > 1 ? sources[length - 1] : undefined; customizer = length > 1 ? sources[length - 1] : undefined;
customizer = typeof customizer == 'function' ? (length--, customizer) : un customizer = (assigner.length > 3 && typeof customizer == 'function')
defined; ? (length--, customizer)
: undefined;
object = Object(object); object = Object(object);
while (++index < length) { while (++index < length) {
var source = sources[index]; var source = sources[index];
if (source) { if (source) {
assigner(object, source, customizer); assigner(object, source, index, customizer);
} }
} }
return object; return object;
}); });
} }
/** /**
* Creates a `baseEach` or `baseEachRight` function. * Creates a `baseEach` or `baseEachRight` function.
* *
* @private * @private
skipping to change at line 1097 skipping to change at line 1061
while ((fromRight ? index-- : ++index < length)) { while ((fromRight ? index-- : ++index < length)) {
if (iteratee(iterable[index], index, iterable) === false) { if (iteratee(iterable[index], index, iterable) === false) {
break; break;
} }
} }
return collection; return collection;
}; };
} }
/** /**
* Creates a base function for methods like `_.forIn`. * Creates a base function for methods like `_.forIn` and `_.forOwn`.
* *
* @private * @private
* @param {boolean} [fromRight] Specify iterating from right to left. * @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new base function. * @returns {Function} Returns the new base function.
*/ */
function createBaseFor(fromRight) { function createBaseFor(fromRight) {
return function(object, iteratee, keysFunc) { return function(object, iteratee, keysFunc) {
var index = -1, var index = -1,
iterable = Object(object), iterable = Object(object),
props = keysFunc(object), props = keysFunc(object),
skipping to change at line 1128 skipping to change at line 1092
} }
/** /**
* Creates a function that produces an instance of `Ctor` regardless of * 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 `. * whether it was invoked as part of a `new` expression or by `call` or `apply `.
* *
* @private * @private
* @param {Function} Ctor The constructor to wrap. * @param {Function} Ctor The constructor to wrap.
* @returns {Function} Returns the new wrapped function. * @returns {Function} Returns the new wrapped function.
*/ */
function createCtorWrapper(Ctor) { function createCtor(Ctor) {
return function() { return function() {
// Use a `switch` statement to work with class constructors. // Use a `switch` statement to work with class constructors. See
// See http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-obj
-objects-call-thisargument-argumentslist ects-call-thisargument-argumentslist
// for more details. // for more details.
var args = arguments; var args = arguments;
var thisBinding = baseCreate(Ctor.prototype), var thisBinding = baseCreate(Ctor.prototype),
result = Ctor.apply(thisBinding, args); result = Ctor.apply(thisBinding, args);
// Mimic the constructor's `return` behavior. // Mimic the constructor's `return` behavior.
// See https://es5.github.io/#x13.2.2 for more details. // See https://es5.github.io/#x13.2.2 for more details.
return isObject(result) ? result : thisBinding; return isObject(result) ? result : thisBinding;
}; };
} }
/** /**
* Creates a function that wraps `func` to invoke it with the optional `this` * Creates a `_.find` or `_.findLast` function.
* binding of `thisArg` and the `partials` prepended to those provided to *
* the wrapper. * @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] : undef
ined;
};
}
/**
* Creates a function that wraps `func` to invoke it with the `this` binding
* of `thisArg` and `partials` prepended to the arguments it receives.
* *
* @private * @private
* @param {Function} func The function to wrap. * @param {Function} func The function to wrap.
* @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` f or more details. * @param {number} bitmask The bitmask flags. See `createWrap` for more detail s.
* @param {*} thisArg The `this` binding of `func`. * @param {*} thisArg The `this` binding of `func`.
* @param {Array} partials The arguments to prepend to those provided to the n * @param {Array} partials The arguments to prepend to those provided to
ew function. * the new function.
* @returns {Function} Returns the new wrapped function. * @returns {Function} Returns the new wrapped function.
*/ */
function createPartialWrapper(func, bitmask, thisArg, partials) { function createPartial(func, bitmask, thisArg, partials) {
if (typeof func != 'function') { if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT); throw new TypeError(FUNC_ERROR_TEXT);
} }
var isBind = bitmask & BIND_FLAG, var isBind = bitmask & WRAP_BIND_FLAG,
Ctor = createCtorWrapper(func); Ctor = createCtor(func);
function wrapper() { function wrapper() {
var argsIndex = -1, var argsIndex = -1,
argsLength = arguments.length, argsLength = arguments.length,
leftIndex = -1, leftIndex = -1,
leftLength = partials.length, leftLength = partials.length,
args = Array(leftLength + argsLength), args = Array(leftLength + argsLength),
fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
while (++leftIndex < leftLength) { while (++leftIndex < leftLength) {
skipping to change at line 1188 skipping to change at line 1172
return wrapper; return wrapper;
} }
/** /**
* A specialized version of `baseIsEqualDeep` for arrays with support for * A specialized version of `baseIsEqualDeep` for arrays with support for
* partial deep comparisons. * partial deep comparisons.
* *
* @private * @private
* @param {Array} array The array to compare. * @param {Array} array The array to compare.
* @param {Array} other The other array to compare. * @param {Array} other The other array to compare.
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more detai
ls.
* @param {Function} customizer The function to customize comparisons.
* @param {Function} equalFunc The function to determine equivalents of values . * @param {Function} equalFunc The function to determine equivalents of values .
* @param {Function} [customizer] The function to customize comparisons. * @param {Object} stack Tracks traversed `array` and `other` objects.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual
` for more details.
* @param {Object} [stack] Tracks traversed `array` and `other` objects.
* @returns {boolean} Returns `true` if the arrays are equivalent, else `false `. * @returns {boolean} Returns `true` if the arrays are equivalent, else `false `.
*/ */
function equalArrays(array, other, equalFunc, customizer, bitmask, stack) { function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
var index = -1, var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
isPartial = bitmask & PARTIAL_COMPARE_FLAG,
isUnordered = bitmask & UNORDERED_COMPARE_FLAG,
arrLength = array.length, arrLength = array.length,
othLength = other.length; othLength = other.length;
if (arrLength != othLength && !(isPartial && othLength > arrLength)) { if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
return false; return false;
} }
var result = true; // Check that cyclic values are equal.
var arrStacked = stack.get(array);
var othStacked = stack.get(other);
if (arrStacked && othStacked) {
return arrStacked == other && othStacked == array;
}
var index = -1,
result = true,
seen = (bitmask & COMPARE_UNORDERED_FLAG) ? [] : undefined;
// Ignore non-index properties. // Ignore non-index properties.
while (++index < arrLength) { while (++index < arrLength) {
var arrValue = array[index], var arrValue = array[index],
othValue = other[index]; othValue = other[index];
var compared; var compared;
if (compared !== undefined) { if (compared !== undefined) {
if (compared) { if (compared) {
continue; continue;
} }
result = false; result = false;
break; break;
} }
// Recursively compare arrays (susceptible to call stack limits). // Recursively compare arrays (susceptible to call stack limits).
if (isUnordered) { if (seen) {
if (!baseSome(other, function(othValue) { if (!baseSome(other, function(othValue, othIndex) {
return arrValue === othValue || equalFunc(arrValue, othValue, cust if (!indexOf(seen, othIndex) &&
omizer, bitmask, stack); (arrValue === othValue || equalFunc(arrValue, othValue, bitmas
k, customizer, stack))) {
return seen.push(othIndex);
}
})) { })) {
result = false; result = false;
break; break;
} }
} else if (!(arrValue === othValue || equalFunc(arrValue, othValue, custom } else if (!(
izer, bitmask, stack))) { arrValue === othValue ||
equalFunc(arrValue, othValue, bitmask, customizer, stack)
)) {
result = false; result = false;
break; break;
} }
} }
return result; return result;
} }
/** /**
* A specialized version of `baseIsEqualDeep` for comparing objects of * A specialized version of `baseIsEqualDeep` for comparing objects of
* the same `toStringTag`. * the same `toStringTag`.
* *
* **Note:** This function only supports comparing values with tags of * **Note:** This function only supports comparing values with tags of
* `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
* *
* @private * @private
* @param {Object} object The object to compare. * @param {Object} object The object to compare.
* @param {Object} other The other object to compare. * @param {Object} other The other object to compare.
* @param {string} tag The `toStringTag` of the objects to compare. * @param {string} tag The `toStringTag` of the objects to compare.
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more detai
ls.
* @param {Function} customizer The function to customize comparisons.
* @param {Function} equalFunc The function to determine equivalents of values . * @param {Function} equalFunc The function to determine equivalents of values .
* @param {Function} [customizer] The function to customize comparisons. * @param {Object} stack Tracks traversed `object` and `other` objects.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual
` for more details.
* @returns {boolean} Returns `true` if the objects are equivalent, else `fals e`. * @returns {boolean} Returns `true` if the objects are equivalent, else `fals e`.
*/ */
function equalByTag(object, other, tag, equalFunc, customizer, bitmask) { function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
switch (tag) { switch (tag) {
case boolTag: case boolTag:
case dateTag: case dateTag:
// Coerce dates and booleans to numbers, dates to milliseconds and boole case numberTag:
ans // Coerce booleans to `1` or `0` and dates to milliseconds.
// to `1` or `0` treating invalid dates coerced to `NaN` as not equal. // Invalid dates are coerced to `NaN`.
return +object == +other; return eq(+object, +other);
case errorTag: case errorTag:
return object.name == other.name && object.message == other.message; return object.name == other.name && object.message == other.message;
case numberTag:
// Treat `NaN` vs. `NaN` as equal.
return (object != +object) ? other != +other : object == +other;
case regexpTag: case regexpTag:
case stringTag: case stringTag:
// Coerce regexes to strings and treat strings primitives and string // Coerce regexes to strings and treat strings, primitives and objects,
// objects as equal. See https://es5.github.io/#x15.10.6.4 for more deta // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-reg
ils. exp.prototype.tostring
// for more details.
return object == (other + ''); return object == (other + '');
} }
return false; return false;
} }
/** /**
* A specialized version of `baseIsEqualDeep` for objects with support for * A specialized version of `baseIsEqualDeep` for objects with support for
* partial deep comparisons. * partial deep comparisons.
* *
* @private * @private
* @param {Object} object The object to compare. * @param {Object} object The object to compare.
* @param {Object} other The other object to compare. * @param {Object} other The other object to compare.
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more detai
ls.
* @param {Function} customizer The function to customize comparisons.
* @param {Function} equalFunc The function to determine equivalents of values . * @param {Function} equalFunc The function to determine equivalents of values .
* @param {Function} [customizer] The function to customize comparisons. * @param {Object} stack Tracks traversed `object` and `other` objects.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual
` for more details.
* @param {Object} [stack] Tracks traversed `object` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `fals e`. * @returns {boolean} Returns `true` if the objects are equivalent, else `fals e`.
*/ */
function equalObjects(object, other, equalFunc, customizer, bitmask, stack) { function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
var isPartial = bitmask & PARTIAL_COMPARE_FLAG, var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
isUnordered = bitmask & UNORDERED_COMPARE_FLAG,
objProps = keys(object), objProps = keys(object),
objLength = objProps.length, objLength = objProps.length,
othProps = keys(other), othProps = keys(other),
othLength = othProps.length; othLength = othProps.length;
if (objLength != othLength && !isPartial) { if (objLength != othLength && !isPartial) {
return false; return false;
} }
var index = objLength; var index = objLength;
while (index--) { while (index--) {
var key = objProps[index]; var key = objProps[index];
if (!(isPartial ? key in other : hasOwnProperty.call(other, key)) || if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
!(isUnordered || key == othProps[index])) {
return false; return false;
} }
} }
// Check that cyclic values are equal.
var objStacked = stack.get(object);
var othStacked = stack.get(other);
if (objStacked && othStacked) {
return objStacked == other && othStacked == object;
}
var result = true; var result = true;
var skipCtor = isPartial; var skipCtor = isPartial;
while (++index < objLength) { while (++index < objLength) {
key = objProps[index]; key = objProps[index];
var objValue = object[key], var objValue = object[key],
othValue = other[key]; othValue = other[key];
var compared; var compared;
// Recursively compare objects (susceptible to call stack limits). // Recursively compare objects (susceptible to call stack limits).
if (!(compared === undefined if (!(compared === undefined
? (objValue === othValue || equalFunc(objValue, othValue, customizer , bitmask, stack)) ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, c ustomizer, stack))
: compared : compared
)) { )) {
result = false; result = false;
break; break;
} }
skipCtor || (skipCtor = key == 'constructor'); skipCtor || (skipCtor = key == 'constructor');
} }
if (result && !skipCtor) { if (result && !skipCtor) {
var objCtor = object.constructor, var objCtor = object.constructor,
othCtor = other.constructor; othCtor = other.constructor;
skipping to change at line 1344 skipping to change at line 1343
('constructor' in object && 'constructor' in other) && ('constructor' in object && 'constructor' in other) &&
!(typeof objCtor == 'function' && objCtor instanceof objCtor && !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
typeof othCtor == 'function' && othCtor instanceof othCtor)) { typeof othCtor == 'function' && othCtor instanceof othCtor)) {
result = false; result = false;
} }
} }
return result; return result;
} }
/** /**
* Gets the "length" property value of `object`. * A specialized version of `baseRest` which flattens the rest array.
*
* **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.or
g/show_bug.cgi?id=142792)
* that affects Safari on at least iOS 8.1-8.3 ARM64.
* *
* @private * @private
* @param {Object} object The object to query. * @param {Function} func The function to apply a rest parameter to.
* @returns {*} Returns the "length" value. * @returns {Function} Returns the new function.
*/ */
var getLength = baseProperty('length'); function flatRest(func) {
return setToString(overRest(func, undefined, flatten), func + '');
}
/** /**
* Creates an array of index keys for `object` values of arrays, * Checks if `value` is a flattenable `arguments` object or array.
* `arguments` objects, and strings, otherwise `null` is returned.
* *
* @private * @private
* @param {Object} object The object to query. * @param {*} value The value to check.
* @returns {Array|null} Returns index keys, else `null`. * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
*/ */
function indexKeys(object) { function isFlattenable(value) {
var length = object ? object.length : undefined; return isArray(value) || isArguments(value);
return (isLength(length) && (isArray(object) || isString(object) || isArgume
nts(object)))
? baseTimes(length, String)
: null;
} }
/** /**
* Checks if `value` is likely a prototype object. * Checks if `value` is a valid array-like index.
* *
* @private * @private
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a prototype, else `false`. * @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 isPrototype(value) { function isIndex(value, length) {
var Ctor = value && value.constructor, var type = typeof value;
proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto; length = length == null ? MAX_SAFE_INTEGER : length;
return value === proto; return !!length &&
(type == 'number' ||
(type != 'symbol' && reIsUint.test(value))) &&
(value > -1 && value % 1 == 0 && value < length);
} }
/** /**
* Converts `value` to a function if it's not one. * Checks if the given arguments are from an iteratee call.
* *
* @private * @private
* @param {*} value The value to process. * @param {*} value The potential iteratee value argument.
* @returns {Function} Returns the function. * @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 cal
l,
* else `false`.
*/ */
function toFunction(value) { function isIterateeCall(value, index, object) {
return typeof value == 'function' ? value : identity; 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;
} }
/** /**
* Creates a clone of `wrapper`. * 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 * @private
* @param {Object} wrapper The wrapper to clone. * @param {Object} object The object to query.
* @returns {Object} Returns the cloned wrapper. * @returns {Array} Returns the array of property names.
*/ */
function wrapperClone(wrapper) { function nativeKeysIn(object) {
var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__); var result = [];
result.__actions__ = copyArray(wrapper.__actions__); if (object != null) {
for (var key in Object(object)) {
result.push(key);
}
}
return result; 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 parame
ter.
* @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` , * Creates an array with all falsey values removed. The values `false`, `null` ,
* `0`, `""`, `undefined`, and `NaN` are falsey. * `0`, `""`, `undefined`, and `NaN` are falsey.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Array * @category Array
* @param {Array} array The array to compact. * @param {Array} array The array to compact.
* @returns {Array} Returns the new array of filtered values. * @returns {Array} Returns the new array of filtered values.
* @example * @example
* *
* _.compact([0, 1, false, 2, '', 3]); * _.compact([0, 1, false, 2, '', 3]);
* // => [1, 2, 3] * // => [1, 2, 3]
*/ */
function compact(array) { function compact(array) {
return baseFilter(array, Boolean); return baseFilter(array, Boolean);
} }
/** /**
* Creates a new array concatenating `array` with any additional arrays * Creates a new array concatenating `array` with any additional arrays
* and/or values. * and/or values.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Array * @category Array
* @param {Array} array The array to concatenate. * @param {Array} array The array to concatenate.
* @param {...*} [values] The values to concatenate. * @param {...*} [values] The values to concatenate.
* @returns {Array} Returns the new concatenated array. * @returns {Array} Returns the new concatenated array.
* @example * @example
* *
* var array = [1]; * var array = [1];
* var other = _.concat(array, 2, [3], [[4]]); * var other = _.concat(array, 2, [3], [[4]]);
* *
* console.log(other); * console.log(other);
* // => [1, 2, 3, [4]] * // => [1, 2, 3, [4]]
* *
* console.log(array); * console.log(array);
* // => [1] * // => [1]
*/ */
var concat = rest(function(array, values) { function concat() {
values = baseFlatten(values); var length = arguments.length;
return arrayConcat(isArray(array) ? array : [Object(array)], values); 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(ar
gs, 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. * Flattens `array` a single level deep.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Array * @category Array
* @param {Array} array The array to flatten. * @param {Array} array The array to flatten.
* @returns {Array} Returns the new flattened array. * @returns {Array} Returns the new flattened array.
* @example * @example
* *
* _.flatten([1, [2, 3, [4]]]); * _.flatten([1, [2, [3, [4]], 5]]);
* // => [1, 2, 3, [4]] * // => [1, 2, [3, [4]], 5]
*/ */
function flatten(array) { function flatten(array) {
var length = array ? array.length : 0; var length = array == null ? 0 : array.length;
return length ? baseFlatten(array) : []; return length ? baseFlatten(array, 1) : [];
} }
/** /**
* This method is like `_.flatten` except that it recursively flattens `array` . * Recursively flattens `array`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 3.0.0
* @category Array * @category Array
* @param {Array} array The array to recursively flatten. * @param {Array} array The array to flatten.
* @returns {Array} Returns the new flattened array. * @returns {Array} Returns the new flattened array.
* @example * @example
* *
* _.flattenDeep([1, [2, 3, [4]]]); * _.flattenDeep([1, [2, [3, [4]], 5]]);
* // => [1, 2, 3, 4] * // => [1, 2, 3, 4, 5]
*/ */
function flattenDeep(array) { function flattenDeep(array) {
var length = array ? array.length : 0; var length = array == null ? 0 : array.length;
return length ? baseFlatten(array, true) : []; return length ? baseFlatten(array, INFINITY) : [];
} }
/** /**
* Gets the first element of `array`. * Gets the first element of `array`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @alias first * @alias first
* @category Array * @category Array
* @param {Array} array The array to query. * @param {Array} array The array to query.
* @returns {*} Returns the first element of `array`. * @returns {*} Returns the first element of `array`.
* @example * @example
* *
* _.head([1, 2, 3]); * _.head([1, 2, 3]);
* // => 1 * // => 1
* *
* _.head([]); * _.head([]);
* // => undefined * // => undefined
*/ */
function head(array) { function head(array) {
return array ? array[0] : undefined; return (array && array.length) ? array[0] : undefined;
} }
/** /**
* Gets the index at which the first occurrence of `value` is found in `array` * Gets the index at which the first occurrence of `value` is found in `array`
* using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-sam * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-sam
evaluezero) evaluezero)
* for equality comparisons. If `fromIndex` is negative, it's used as the offs * for equality comparisons. If `fromIndex` is negative, it's used as the
et * offset from the end of `array`.
* from the end of `array`. If `array` is sorted providing `true` for `fromInd
ex`
* performs a faster binary search.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Array * @category Array
* @param {Array} array The array to search. * @param {Array} array The array to inspect.
* @param {*} value The value to search for. * @param {*} value The value to search for.
* @param {number} [fromIndex=0] The index to search from. * @param {number} [fromIndex=0] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`. * @returns {number} Returns the index of the matched value, else `-1`.
* @example * @example
* *
* _.indexOf([1, 2, 1, 2], 2); * _.indexOf([1, 2, 1, 2], 2);
* // => 1 * // => 1
* *
* // using `fromIndex` * // Search from the `fromIndex`.
* _.indexOf([1, 2, 1, 2], 2, 2); * _.indexOf([1, 2, 1, 2], 2, 2);
* // => 3 * // => 3
*/ */
function indexOf(array, value, fromIndex) { function indexOf(array, value, fromIndex) {
var length = array ? array.length : 0; var length = array == null ? 0 : array.length;
if (typeof fromIndex == 'number') { if (typeof fromIndex == 'number') {
fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex; fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
} else { } else {
fromIndex = 0; fromIndex = 0;
} }
var index = (fromIndex || 0) - 1, var index = (fromIndex || 0) - 1,
isReflexive = value === value; isReflexive = value === value;
while (++index < length) { while (++index < length) {
var other = array[index]; var other = array[index];
skipping to change at line 1558 skipping to change at line 1688
} }
} }
return -1; return -1;
} }
/** /**
* Gets the last element of `array`. * Gets the last element of `array`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Array * @category Array
* @param {Array} array The array to query. * @param {Array} array The array to query.
* @returns {*} Returns the last element of `array`. * @returns {*} Returns the last element of `array`.
* @example * @example
* *
* _.last([1, 2, 3]); * _.last([1, 2, 3]);
* // => 3 * // => 3
*/ */
function last(array) { function last(array) {
var length = array ? array.length : 0; var length = array == null ? 0 : array.length;
return length ? array[length - 1] : undefined; return length ? array[length - 1] : undefined;
} }
/** /**
* Creates a slice of `array` from `start` up to, but not including, `end`. * 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/Arr * **Note:** This method is used instead of
ay/slice) * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
* to ensure dense arrays are returned. * returned.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 3.0.0
* @category Array * @category Array
* @param {Array} array The array to slice. * @param {Array} array The array to slice.
* @param {number} [start=0] The start position. * @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position. * @param {number} [end=array.length] The end position.
* @returns {Array} Returns the slice of `array`. * @returns {Array} Returns the slice of `array`.
*/ */
function slice(array, start, end) { function slice(array, start, end) {
var length = array ? array.length : 0; var length = array == null ? 0 : array.length;
start = start == null ? 0 : +start;
end = end === undefined ? length : +end;
return length ? baseSlice(array, start, end) : []; return length ? baseSlice(array, start, end) : [];
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Creates a `lodash` object that wraps `value` with explicit method chaining * Creates a `lodash` wrapper instance that wraps `value` with explicit method
enabled. * chain sequences enabled. The result of such sequences must be unwrapped
* The result of such method chaining must be unwrapped with `_#value`. * with `_#value`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 1.3.0
* @category Seq * @category Seq
* @param {*} value The value to wrap. * @param {*} value The value to wrap.
* @returns {Object} Returns the new `lodash` wrapper instance. * @returns {Object} Returns the new `lodash` wrapper instance.
* @example * @example
* *
* var users = [ * var users = [
* { 'user': 'barney', 'age': 36 }, * { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }, * { 'user': 'fred', 'age': 40 },
* { 'user': 'pebbles', 'age': 1 } * { 'user': 'pebbles', 'age': 1 }
* ]; * ];
skipping to change at line 1626 skipping to change at line 1763
* .value(); * .value();
* // => 'pebbles is 1' * // => 'pebbles is 1'
*/ */
function chain(value) { function chain(value) {
var result = lodash(value); var result = lodash(value);
result.__chain__ = true; result.__chain__ = true;
return result; return result;
} }
/** /**
* This method invokes `interceptor` and returns `value`. The interceptor is * This method invokes `interceptor` and returns `value`. The interceptor
* invoked with one argument; (value). The purpose of this method is to "tap i * is invoked with one argument; (value). The purpose of this method is to
nto" * "tap into" a method chain sequence in order to modify intermediate results.
* a method chain in order to perform operations on intermediate results withi
n
* the chain.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Seq * @category Seq
* @param {*} value The value to provide to `interceptor`. * @param {*} value The value to provide to `interceptor`.
* @param {Function} interceptor The function to invoke. * @param {Function} interceptor The function to invoke.
* @returns {*} Returns `value`. * @returns {*} Returns `value`.
* @example * @example
* *
* _([1, 2, 3]) * _([1, 2, 3])
* .tap(function(array) { * .tap(function(array) {
* // Mutate input array.
* array.pop(); * array.pop();
* }) * })
* .reverse() * .reverse()
* .value(); * .value();
* // => [2, 1] * // => [2, 1]
*/ */
function tap(value, interceptor) { function tap(value, interceptor) {
interceptor(value); interceptor(value);
return value; return value;
} }
/** /**
* This method is like `_.tap` except that it returns the result of `intercept or`. * This method is like `_.tap` except that it returns the result of `intercept or`.
* The purpose of this method is to "pass thru" values replacing intermediate
* results in a method chain sequence.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 3.0.0
* @category Seq * @category Seq
* @param {*} value The value to provide to `interceptor`. * @param {*} value The value to provide to `interceptor`.
* @param {Function} interceptor The function to invoke. * @param {Function} interceptor The function to invoke.
* @returns {*} Returns the result of `interceptor`. * @returns {*} Returns the result of `interceptor`.
* @example * @example
* *
* _(' abc ') * _(' abc ')
* .chain() * .chain()
* .trim() * .trim()
* .thru(function(value) { * .thru(function(value) {
* return [value]; * return [value];
* }) * })
* .value(); * .value();
* // => ['abc'] * // => ['abc']
*/ */
function thru(value, interceptor) { function thru(value, interceptor) {
return interceptor(value); return interceptor(value);
} }
/** /**
* Enables explicit method chaining on the wrapper object. * Creates a `lodash` wrapper instance with explicit method chain sequences en abled.
* *
* @name chain * @name chain
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Seq * @category Seq
* @returns {Object} Returns the new `lodash` wrapper instance. * @returns {Object} Returns the new `lodash` wrapper instance.
* @example * @example
* *
* var users = [ * var users = [
* { 'user': 'barney', 'age': 36 }, * { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 } * { 'user': 'fred', 'age': 40 }
* ]; * ];
* *
* // without explicit chaining * // A sequence without explicit chaining.
* _(users).head(); * _(users).head();
* // => { 'user': 'barney', 'age': 36 } * // => { 'user': 'barney', 'age': 36 }
* *
* // with explicit chaining * // A sequence with explicit chaining.
* _(users) * _(users)
* .chain() * .chain()
* .head() * .head()
* .pick('user') * .pick('user')
* .value(); * .value();
* // => { 'user': 'barney' } * // => { 'user': 'barney' }
*/ */
function wrapperChain() { function wrapperChain() {
return chain(this); return chain(this);
} }
/** /**
* Executes the chained sequence to extract the unwrapped value. * Executes the chain sequence to resolve the unwrapped value.
* *
* @name value * @name value
* @memberOf _ * @memberOf _
* @alias run, toJSON, valueOf * @since 0.1.0
* @alias toJSON, valueOf
* @category Seq * @category Seq
* @returns {*} Returns the resolved unwrapped value. * @returns {*} Returns the resolved unwrapped value.
* @example * @example
* *
* _([1, 2, 3]).value(); * _([1, 2, 3]).value();
* // => [1, 2, 3] * // => [1, 2, 3]
*/ */
function wrapperValue() { function wrapperValue() {
return baseWrapperValue(this.__wrapped__, this.__actions__); return baseWrapperValue(this.__wrapped__, this.__actions__);
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Checks if `predicate` returns truthy for **all** elements of `collection`. * Checks if `predicate` returns truthy for **all** elements of `collection`.
* Iteration is stopped once `predicate` returns falsey. The predicate is * Iteration is stopped once `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index|key, collection). * 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 * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked * @param {Function} [predicate=_.identity] The function invoked per iteration
per iteration. .
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.m * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map
ap`. `.
* @returns {boolean} Returns `true` if all elements pass the predicate check, * @returns {boolean} Returns `true` if all elements pass the predicate check,
else `false`. * else `false`.
* @example * @example
* *
* _.every([true, 1, null, 'yes'], Boolean); * _.every([true, 1, null, 'yes'], Boolean);
* // => false * // => false
* *
* var users = [ * var users = [
* { 'user': 'barney', 'active': false }, * { 'user': 'barney', 'age': 36, 'active': false },
* { 'user': 'fred', 'active': false } * { 'user': 'fred', 'age': 40, 'active': false }
* ]; * ];
* *
* // using the `_.matches` iteratee shorthand * // The `_.matches` iteratee shorthand.
* _.every(users, { 'user': 'barney', 'active': false }); * _.every(users, { 'user': 'barney', 'active': false });
* // => false * // => false
* *
* // using the `_.matchesProperty` iteratee shorthand * // The `_.matchesProperty` iteratee shorthand.
* _.every(users, ['active', false]); * _.every(users, ['active', false]);
* // => true * // => true
* *
* // using the `_.property` iteratee shorthand * // The `_.property` iteratee shorthand.
* _.every(users, 'active'); * _.every(users, 'active');
* // => false * // => false
*/ */
function every(collection, predicate, guard) { function every(collection, predicate, guard) {
predicate = guard ? undefined : predicate; predicate = guard ? undefined : predicate;
return baseEvery(collection, baseIteratee(predicate)); return baseEvery(collection, baseIteratee(predicate));
} }
/** /**
* Iterates over elements of `collection`, returning an array of all elements * Iterates over elements of `collection`, returning an array of all elements
* `predicate` returns truthy for. The predicate is invoked with three argumen * `predicate` returns truthy for. The predicate is invoked with three
ts: * arguments: (value, index|key, collection).
* (value, index|key, collection). *
* **Note:** Unlike `_.remove`, this method returns a new array.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration. * @param {Function} [predicate=_.identity] The function invoked per iteration .
* @returns {Array} Returns the new filtered array. * @returns {Array} Returns the new filtered array.
* @see _.reject
* @example * @example
* *
* var users = [ * var users = [
* { 'user': 'barney', 'age': 36, 'active': true }, * { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false } * { 'user': 'fred', 'age': 40, 'active': false }
* ]; * ];
* *
* _.filter(users, function(o) { return !o.active; }); * _.filter(users, function(o) { return !o.active; });
* // => objects for ['fred'] * // => objects for ['fred']
* *
* // using the `_.matches` iteratee shorthand * // The `_.matches` iteratee shorthand.
* _.filter(users, { 'age': 36, 'active': true }); * _.filter(users, { 'age': 36, 'active': true });
* // => objects for ['barney'] * // => objects for ['barney']
* *
* // using the `_.matchesProperty` iteratee shorthand * // The `_.matchesProperty` iteratee shorthand.
* _.filter(users, ['active', false]); * _.filter(users, ['active', false]);
* // => objects for ['fred'] * // => objects for ['fred']
* *
* // using the `_.property` iteratee shorthand * // The `_.property` iteratee shorthand.
* _.filter(users, 'active'); * _.filter(users, 'active');
* // => objects for ['barney'] * // => objects for ['barney']
*
* // Combining several predicates using `_.overEvery` or `_.overSome`.
* _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
* // => objects for ['fred', 'barney']
*/ */
function filter(collection, predicate) { function filter(collection, predicate) {
return baseFilter(collection, baseIteratee(predicate)); return baseFilter(collection, baseIteratee(predicate));
} }
/** /**
* Iterates over elements of `collection`, returning the first element * Iterates over elements of `collection`, returning the first element
* `predicate` returns truthy for. The predicate is invoked with three argumen * `predicate` returns truthy for. The predicate is invoked with three
ts: * arguments: (value, index|key, collection).
* (value, index|key, collection).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to search. * @param {Array|Object} collection The collection to inspect.
* @param {Function|Object|string} [predicate=_.identity] The function invoked * @param {Function} [predicate=_.identity] The function invoked per iteration
per iteration. .
* @param {number} [fromIndex=0] The index to search from.
* @returns {*} Returns the matched element, else `undefined`. * @returns {*} Returns the matched element, else `undefined`.
* @example * @example
* *
* var users = [ * var users = [
* { 'user': 'barney', 'age': 36, 'active': true }, * { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false }, * { 'user': 'fred', 'age': 40, 'active': false },
* { 'user': 'pebbles', 'age': 1, 'active': true } * { 'user': 'pebbles', 'age': 1, 'active': true }
* ]; * ];
* *
* _.find(users, function(o) { return o.age < 40; }); * _.find(users, function(o) { return o.age < 40; });
* // => object for 'barney' * // => object for 'barney'
* *
* // using the `_.matches` iteratee shorthand * // The `_.matches` iteratee shorthand.
* _.find(users, { 'age': 1, 'active': true }); * _.find(users, { 'age': 1, 'active': true });
* // => object for 'pebbles' * // => object for 'pebbles'
* *
* // using the `_.matchesProperty` iteratee shorthand * // The `_.matchesProperty` iteratee shorthand.
* _.find(users, ['active', false]); * _.find(users, ['active', false]);
* // => object for 'fred' * // => object for 'fred'
* *
* // using the `_.property` iteratee shorthand * // The `_.property` iteratee shorthand.
* _.find(users, 'active'); * _.find(users, 'active');
* // => object for 'barney' * // => object for 'barney'
*/ */
function find(collection, predicate) { var find = createFind(findIndex);
return baseFind(collection, baseIteratee(predicate), baseEach);
}
/** /**
* Iterates over elements of `collection` invoking `iteratee` for each element . * Iterates over elements of `collection` and invokes `iteratee` for each elem ent.
* The iteratee is invoked with three arguments: (value, index|key, collection ). * The iteratee is invoked with three arguments: (value, index|key, collection ).
* Iteratee functions may exit iteration early by explicitly returning `false` . * Iteratee functions may exit iteration early by explicitly returning `false` .
* *
* **Note:** As with other "Collections" methods, objects with a "length" prop * **Note:** As with other "Collections" methods, objects with a "length"
erty * property are iterated like arrays. To avoid this behavior use `_.forIn`
* are iterated like arrays. To avoid this behavior use `_.forIn` or `_.forOwn * or `_.forOwn` for object iteration.
`
* for object iteration.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @alias each * @alias each
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array|Object} Returns `collection`. * @returns {Array|Object} Returns `collection`.
* @see _.forEachRight
* @example * @example
* *
* _([1, 2]).forEach(function(value) { * _.forEach([1, 2], function(value) {
* console.log(value); * console.log(value);
* }); * });
* // => logs `1` then `2` * // => Logs `1` then `2`.
* *
* _.forEach({ 'a': 1, 'b': 2 }, function(value, key) { * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
* console.log(key); * console.log(key);
* }); * });
* // => logs 'a' then 'b' (iteration order is not guaranteed) * // => Logs 'a' then 'b' (iteration order is not guaranteed).
*/ */
function forEach(collection, iteratee) { function forEach(collection, iteratee) {
return baseEach(collection, toFunction(iteratee)); return baseEach(collection, baseIteratee(iteratee));
} }
/** /**
* Invokes the method at `path` of each element in `collection`, returning * Creates an array of values by running each element in `collection` thru
* an array of the results of each invoked method. Any additional arguments
* are provided to each invoked method. If `methodName` is a function it's
* invoked for, and `this` bound to, each element in `collection`.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Array|Function|string} path The path of the method to invoke or
* the function invoked per iteration.
* @param {...*} [args] The arguments to invoke each method with.
* @returns {Array} Returns the array of results.
* @example
*
* _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
* // => [[1, 5, 7], [1, 2, 3]]
*
* _.invokeMap([123, 456], String.prototype.split, '');
* // => [['1', '2', '3'], ['4', '5', '6']]
*/
var invokeMap = rest(function(collection, path, args) {
var isFunc = typeof path == 'function';
return baseMap(collection, function(value) {
var func = isFunc ? path : value[path];
return func == null ? func : func.apply(value, args);
});
});
/**
* Creates an array of values by running each element in `collection` through
* `iteratee`. The iteratee is invoked with three arguments: * `iteratee`. The iteratee is invoked with three arguments:
* (value, index|key, collection). * (value, index|key, collection).
* *
* Many lodash methods are guarded to work as iteratees for methods like * Many lodash methods are guarded to work as iteratees for methods like
* `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`. * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
* *
* The guarded methods are: * The guarded methods are:
* `ary`, `curry`, `curryRight`, `drop`, `dropRight`, `every`, `fill`, * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
* `invert`, `parseInt`, `random`, `range`, `rangeRight`, `slice`, `some`, * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
* `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimEnd`, `trimStart`, * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
* and `words` * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new mapped array. * @returns {Array} Returns the new mapped array.
* @example * @example
* *
* function square(n) { * function square(n) {
* return n * n; * return n * n;
* } * }
* *
* _.map([1, 2], square); * _.map([4, 8], square);
* // => [3, 6] * // => [16, 64]
* *
* _.map({ 'a': 1, 'b': 2 }, square); * _.map({ 'a': 4, 'b': 8 }, square);
* // => [3, 6] (iteration order is not guaranteed) * // => [16, 64] (iteration order is not guaranteed)
* *
* var users = [ * var users = [
* { 'user': 'barney' }, * { 'user': 'barney' },
* { 'user': 'fred' } * { 'user': 'fred' }
* ]; * ];
* *
* // using the `_.property` iteratee shorthand * // The `_.property` iteratee shorthand.
* _.map(users, 'user'); * _.map(users, 'user');
* // => ['barney', 'fred'] * // => ['barney', 'fred']
*/ */
function map(collection, iteratee) { function map(collection, iteratee) {
return baseMap(collection, baseIteratee(iteratee)); return baseMap(collection, baseIteratee(iteratee));
} }
/** /**
* Reduces `collection` to a value which is the accumulated result of running * Reduces `collection` to a value which is the accumulated result of running
* each element in `collection` through `iteratee`, where each successive * each element in `collection` thru `iteratee`, where each successive
* invocation is supplied the return value of the previous. If `accumulator` * invocation is supplied the return value of the previous. If `accumulator`
* is not provided the first element of `collection` is used as the initial * is not given, the first element of `collection` is used as the initial
* value. The iteratee is invoked with four arguments: * value. The iteratee is invoked with four arguments:
* (accumulator, value, index|key, collection). * (accumulator, value, index|key, collection).
* *
* Many lodash methods are guarded to work as iteratees for methods like * Many lodash methods are guarded to work as iteratees for methods like
* `_.reduce`, `_.reduceRight`, and `_.transform`. * `_.reduce`, `_.reduceRight`, and `_.transform`.
* *
* The guarded methods are: * The guarded methods are:
* `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`, * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
* and `sortBy` * and `sortBy`
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The initial value. * @param {*} [accumulator] The initial value.
* @returns {*} Returns the accumulated value. * @returns {*} Returns the accumulated value.
* @see _.reduceRight
* @example * @example
* *
* _.reduce([1, 2], function(sum, n) { * _.reduce([1, 2], function(sum, n) {
* return sum + n; * return sum + n;
* }); * }, 0);
* // => 3 * // => 3
* *
* _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) { * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
* (result[value] || (result[value] = [])).push(key); * (result[value] || (result[value] = [])).push(key);
* return result; * return result;
* }, {}); * }, {});
* // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed) * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
*/ */
function reduce(collection, iteratee, accumulator) { function reduce(collection, iteratee, accumulator) {
return baseReduce(collection, baseIteratee(iteratee), accumulator, arguments .length < 3, baseEach); return baseReduce(collection, baseIteratee(iteratee), accumulator, arguments .length < 3, baseEach);
} }
/** /**
* Gets the size of `collection` by returning its length for array-like * Gets the size of `collection` by returning its length for array-like
* values or the number of own enumerable properties for objects. * values or the number of own enumerable string keyed properties for objects.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to inspect. * @param {Array|Object|string} collection The collection to inspect.
* @returns {number} Returns the collection size. * @returns {number} Returns the collection size.
* @example * @example
* *
* _.size([1, 2, 3]); * _.size([1, 2, 3]);
* // => 3 * // => 3
* *
* _.size({ 'a': 1, 'b': 2 }); * _.size({ 'a': 1, 'b': 2 });
* // => 2 * // => 2
* *
* _.size('pebbles'); * _.size('pebbles');
* // => 7 * // => 7
*/ */
function size(collection) { function size(collection) {
if (collection == null) { if (collection == null) {
return 0; return 0;
} }
collection = isArrayLike(collection) ? collection : keys(collection); collection = isArrayLike(collection) ? collection : nativeKeys(collection);
return collection.length; return collection.length;
} }
/** /**
* Checks if `predicate` returns truthy for **any** element of `collection`. * Checks if `predicate` returns truthy for **any** element of `collection`.
* Iteration is stopped once `predicate` returns truthy. The predicate is * Iteration is stopped once `predicate` returns truthy. The predicate is
* invoked with three arguments: (value, index|key, collection). * invoked with three arguments: (value, index|key, collection).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked * @param {Function} [predicate=_.identity] The function invoked per iteration
per iteration. .
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.m * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map
ap`. `.
* @returns {boolean} Returns `true` if any element passes the predicate check * @returns {boolean} Returns `true` if any element passes the predicate check
, else `false`. ,
* else `false`.
* @example * @example
* *
* _.some([null, 0, 'yes', false], Boolean); * _.some([null, 0, 'yes', false], Boolean);
* // => true * // => true
* *
* var users = [ * var users = [
* { 'user': 'barney', 'active': true }, * { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false } * { 'user': 'fred', 'active': false }
* ]; * ];
* *
* // using the `_.matches` iteratee shorthand * // The `_.matches` iteratee shorthand.
* _.some(users, { 'user': 'barney', 'active': false }); * _.some(users, { 'user': 'barney', 'active': false });
* // => false * // => false
* *
* // using the `_.matchesProperty` iteratee shorthand * // The `_.matchesProperty` iteratee shorthand.
* _.some(users, ['active', false]); * _.some(users, ['active', false]);
* // => true * // => true
* *
* // using the `_.property` iteratee shorthand * // The `_.property` iteratee shorthand.
* _.some(users, 'active'); * _.some(users, 'active');
* // => true * // => true
*/ */
function some(collection, predicate, guard) { function some(collection, predicate, guard) {
predicate = guard ? undefined : predicate; predicate = guard ? undefined : predicate;
return baseSome(collection, baseIteratee(predicate)); return baseSome(collection, baseIteratee(predicate));
} }
/** /**
* Creates an array of elements, sorted in ascending order by the results of * Creates an array of elements, sorted in ascending order by the results of
* running each element in a collection through each iteratee. This method * running each element in a collection thru each iteratee. This method
* performs a stable sort, that is, it preserves the original sort order of * performs a stable sort, that is, it preserves the original sort order of
* equal elements. The iteratees are invoked with one argument: (value). * equal elements. The iteratees are invoked with one argument: (value).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Collection * @category Collection
* @param {Array|Object} collection The collection to iterate over. * @param {Array|Object} collection The collection to iterate over.
* @param {...(Function|Function[]|Object|Object[]|string|string[])} [iteratee * @param {...(Function|Function[])} [iteratees=[_.identity]]
s=[_.identity]] * The iteratees to sort by.
* The iteratees to sort by, specified individually or in arrays.
* @returns {Array} Returns the new sorted array. * @returns {Array} Returns the new sorted array.
* @example * @example
* *
* var users = [ * var users = [
* { 'user': 'fred', 'age': 48 }, * { 'user': 'fred', 'age': 48 },
* { 'user': 'barney', 'age': 36 }, * { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 42 }, * { 'user': 'fred', 'age': 30 },
* { 'user': 'barney', 'age': 34 } * { 'user': 'barney', 'age': 34 }
* ]; * ];
* *
* _.sortBy(users, function(o) { return o.user; }); * _.sortBy(users, [function(o) { return o.user; }]);
* // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 4 * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 3
2]] 0]]
* *
* _.sortBy(users, ['user', 'age']); * _.sortBy(users, ['user', 'age']);
* // => objects for [['barney', 34], ['barney', 36], ['fred', 42], ['fred', 4 * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 4
8]] 8]]
*
* _.sortBy(users, 'user', function(o) {
* return Math.floor(o.age / 10);
* });
* // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 4
2]]
*/ */
function sortBy(collection, iteratee) { function sortBy(collection, iteratee) {
var index = 0; var index = 0;
iteratee = baseIteratee(iteratee); iteratee = baseIteratee(iteratee);
return baseMap(baseMap(collection, function(value, key, collection) { return baseMap(baseMap(collection, function(value, key, collection) {
return { 'value': value, 'index': index++, 'criteria': iteratee(value, key , collection) }; return { 'value': value, 'index': index++, 'criteria': iteratee(value, key , collection) };
}).sort(function(object, other) { }).sort(function(object, other) {
return compareAscending(object.criteria, other.criteria) || (object.index - other.index); return compareAscending(object.criteria, other.criteria) || (object.index - other.index);
}), baseProperty('value')); }), baseProperty('value'));
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Gets the timestamp of the number of milliseconds that have elapsed since
* the Unix epoch (1 January 1970 00:00:00 UTC).
*
* @static
* @memberOf _
* @type Function
* @category Date
* @returns {number} Returns the timestamp.
* @example
*
* _.defer(function(stamp) {
* console.log(_.now() - stamp);
* }, _.now());
* // => logs the number of milliseconds it took for the deferred function to
be invoked
*/
var now = Date.now;
/*------------------------------------------------------------------------*/
/**
* Creates a function that invokes `func`, with the `this` binding and argumen ts * Creates a function that invokes `func`, with the `this` binding and argumen ts
* of the created function, while it's called less than `n` times. Subsequent * 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` invocati on. * calls to the created function return the result of the last `func` invocati on.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 3.0.0
* @category Function * @category Function
* @param {number} n The number of calls at which `func` is no longer invoked. * @param {number} n The number of calls at which `func` is no longer invoked.
* @param {Function} func The function to restrict. * @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function. * @returns {Function} Returns the new restricted function.
* @example * @example
* *
* jQuery(element).on('click', _.before(5, addContactToList)); * jQuery(element).on('click', _.before(5, addContactToList));
* // => allows adding up to 4 contacts to the list * // => Allows adding up to 4 contacts to the list.
*/ */
function before(n, func) { function before(n, func) {
var result; var result;
if (typeof func != 'function') { if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT); throw new TypeError(FUNC_ERROR_TEXT);
} }
n = toInteger(n); n = toInteger(n);
return function() { return function() {
if (--n > 0) { if (--n > 0) {
result = func.apply(this, arguments); result = func.apply(this, arguments);
} }
if (n <= 1) { if (n <= 1) {
func = undefined; func = undefined;
} }
return result; return result;
}; };
} }
/** /**
* Creates a function that invokes `func` with the `this` binding of `thisArg` * Creates a function that invokes `func` with the `this` binding of `thisArg`
* and prepends any additional `_.bind` arguments to those provided to the * and `partials` prepended to the arguments it receives.
* bound function.
* *
* The `_.bind.placeholder` value, which defaults to `_` in monolithic builds, * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
* may be used as a placeholder for partially applied arguments. * may be used as a placeholder for partially applied arguments.
* *
* **Note:** Unlike native `Function#bind` this method doesn't set the "length " * **Note:** Unlike native `Function#bind`, this method doesn't set the "lengt h"
* property of bound functions. * property of bound functions.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Function * @category Function
* @param {Function} func The function to bind. * @param {Function} func The function to bind.
* @param {*} thisArg The `this` binding of `func`. * @param {*} thisArg The `this` binding of `func`.
* @param {...*} [partials] The arguments to be partially applied. * @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new bound function. * @returns {Function} Returns the new bound function.
* @example * @example
* *
* var greet = function(greeting, punctuation) { * function greet(greeting, punctuation) {
* return greeting + ' ' + this.user + punctuation; * return greeting + ' ' + this.user + punctuation;
* }; * }
* *
* var object = { 'user': 'fred' }; * var object = { 'user': 'fred' };
* *
* var bound = _.bind(greet, object, 'hi'); * var bound = _.bind(greet, object, 'hi');
* bound('!'); * bound('!');
* // => 'hi fred!' * // => 'hi fred!'
* *
* // using placeholders * // Bound with placeholders.
* var bound = _.bind(greet, object, _, '!'); * var bound = _.bind(greet, object, _, '!');
* bound('hi'); * bound('hi');
* // => 'hi fred!' * // => 'hi fred!'
*/ */
var bind = rest(function(func, thisArg, partials) { var bind = baseRest(function(func, thisArg, partials) {
return createPartialWrapper(func, BIND_FLAG | PARTIAL_FLAG, thisArg, partial return createPartial(func, WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG, thisArg, part
s); ials);
}); });
/** /**
* Defers invoking the `func` until the current call stack has cleared. Any * Defers invoking the `func` until the current call stack has cleared. Any
* additional arguments are provided to `func` when it's invoked. * additional arguments are provided to `func` when it's invoked.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Function * @category Function
* @param {Function} func The function to defer. * @param {Function} func The function to defer.
* @param {...*} [args] The arguments to invoke `func` with. * @param {...*} [args] The arguments to invoke `func` with.
* @returns {number} Returns the timer id. * @returns {number} Returns the timer id.
* @example * @example
* *
* _.defer(function(text) { * _.defer(function(text) {
* console.log(text); * console.log(text);
* }, 'deferred'); * }, 'deferred');
* // logs 'deferred' after one or more milliseconds * // => Logs 'deferred' after one millisecond.
*/ */
var defer = rest(function(func, args) { var defer = baseRest(function(func, args) {
return baseDelay(func, 1, args); return baseDelay(func, 1, args);
}); });
/** /**
* Invokes `func` after `wait` milliseconds. Any additional arguments are * Invokes `func` after `wait` milliseconds. Any additional arguments are
* provided to `func` when it's invoked. * provided to `func` when it's invoked.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Function * @category Function
* @param {Function} func The function to delay. * @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation. * @param {number} wait The number of milliseconds to delay invocation.
* @param {...*} [args] The arguments to invoke `func` with. * @param {...*} [args] The arguments to invoke `func` with.
* @returns {number} Returns the timer id. * @returns {number} Returns the timer id.
* @example * @example
* *
* _.delay(function(text) { * _.delay(function(text) {
* console.log(text); * console.log(text);
* }, 1000, 'later'); * }, 1000, 'later');
* // => logs 'later' after one second * // => Logs 'later' after one second.
*/ */
var delay = rest(function(func, wait, args) { var delay = baseRest(function(func, wait, args) {
return baseDelay(func, toNumber(wait) || 0, args); return baseDelay(func, toNumber(wait) || 0, args);
}); });
/** /**
* Creates a function that negates the result of the predicate `func`. The * Creates a function that negates the result of the predicate `func`. The
* `func` predicate is invoked with the `this` binding and arguments of the * `func` predicate is invoked with the `this` binding and arguments of the
* created function. * created function.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 3.0.0
* @category Function * @category Function
* @param {Function} predicate The predicate to negate. * @param {Function} predicate The predicate to negate.
* @returns {Function} Returns the new function. * @returns {Function} Returns the new negated function.
* @example * @example
* *
* function isEven(n) { * function isEven(n) {
* return n % 2 == 0; * return n % 2 == 0;
* } * }
* *
* _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven)); * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
* // => [1, 3, 5] * // => [1, 3, 5]
*/ */
function negate(predicate) { function negate(predicate) {
if (typeof predicate != 'function') { if (typeof predicate != 'function') {
throw new TypeError(FUNC_ERROR_TEXT); throw new TypeError(FUNC_ERROR_TEXT);
} }
return function() { return function() {
return !predicate.apply(this, arguments); var args = arguments;
return !predicate.apply(this, args);
}; };
} }
/** /**
* Creates a function that is restricted to invoking `func` once. Repeat calls * 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 * to the function return the value of the first invocation. The `func` is
* invoked with the `this` binding and arguments of the created function. * invoked with the `this` binding and arguments of the created function.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Function * @category Function
* @param {Function} func The function to restrict. * @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function. * @returns {Function} Returns the new restricted function.
* @example * @example
* *
* var initialize = _.once(createApplication); * var initialize = _.once(createApplication);
* initialize(); * initialize();
* initialize(); * initialize();
* // `initialize` invokes `createApplication` once * // => `createApplication` is invoked once
*/ */
function once(func) { function once(func) {
return before(2, func); return before(2, func);
} }
/**
* Creates a function that invokes `func` with the `this` binding of the
* created function and arguments from `start` and beyond provided as an array
.
*
* **Note:** This method is based on the [rest parameter](https://mdn.io/rest_
parameters).
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to apply a rest parameter to.
* @param {number} [start=func.length-1] The start position of the rest parame
ter.
* @returns {Function} Returns the new function.
* @example
*
* var say = _.rest(function(what, names) {
* return what + ' ' + _.initial(names).join(', ') +
* (_.size(names) > 1 ? ', & ' : '') + _.last(names);
* });
*
* say('hello', 'fred', 'barney', 'pebbles');
* // => 'hello fred, barney, & pebbles'
*/
function rest(func, start) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
start = nativeMax(start === undefined ? (func.length - 1) : toInteger(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];
}
var otherArgs = Array(start + 1);
index = -1;
while (++index < start) {
otherArgs[index] = args[index];
}
otherArgs[start] = array;
return func.apply(this, otherArgs);
};
}
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Creates a shallow clone of `value`. * Creates a shallow clone of `value`.
* *
* **Note:** This method is loosely based on the * **Note:** This method is loosely based on the
* [structured clone algorithm](https://mdn.io/Structured_clone_algorithm) * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
* and supports cloning arrays, array buffers, booleans, date objects, maps, * and supports cloning arrays, array buffers, booleans, date objects, maps,
* numbers, `Object` objects, regexes, sets, strings, symbols, and typed * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
* arrays. The own enumerable properties of `arguments` objects are cloned * arrays. The own enumerable properties of `arguments` objects are cloned
* as plain objects. An empty object is returned for uncloneable values such * as plain objects. An empty object is returned for uncloneable values such
* as error objects, functions, DOM nodes, and WeakMaps. * as error objects, functions, DOM nodes, and WeakMaps.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to clone. * @param {*} value The value to clone.
* @returns {*} Returns the cloned value. * @returns {*} Returns the cloned value.
* @see _.cloneDeep
* @example * @example
* *
* var objects = [{ 'a': 1 }, { 'b': 2 }]; * var objects = [{ 'a': 1 }, { 'b': 2 }];
* *
* var shallow = _.clone(objects); * var shallow = _.clone(objects);
* console.log(shallow[0] === objects[0]); * console.log(shallow[0] === objects[0]);
* // => true * // => true
*/ */
function clone(value) { function clone(value) {
if (!isObject(value)) { if (!isObject(value)) {
return value; return value;
} }
return isArray(value) ? copyArray(value) : copyObject(value, keys(value)); return isArray(value) ? copyArray(value) : copyObject(value, nativeKeys(valu e));
} }
/** /**
* Performs a [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#se * Performs a
c-samevaluezero) * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevalue
zero)
* comparison between two values to determine if they are equivalent. * comparison between two values to determine if they are equivalent.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to compare. * @param {*} value The value to compare.
* @param {*} other The other value to compare. * @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false `. * @returns {boolean} Returns `true` if the values are equivalent, else `false `.
* @example * @example
* *
* var object = { 'user': 'fred' }; * var object = { 'a': 1 };
* var other = { 'user': 'fred' }; * var other = { 'a': 1 };
* *
* _.eq(object, object); * _.eq(object, object);
* // => true * // => true
* *
* _.eq(object, other); * _.eq(object, other);
* // => false * // => false
* *
* _.eq('a', 'a'); * _.eq('a', 'a');
* // => true * // => true
* *
skipping to change at line 2396 skipping to change at line 2472
* // => false * // => false
* *
* _.eq(NaN, NaN); * _.eq(NaN, NaN);
* // => true * // => true
*/ */
function eq(value, other) { function eq(value, other) {
return value === other || (value !== value && other !== other); return value === other || (value !== value && other !== other);
} }
/** /**
* Checks if `value` is greater than `other`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is greater than `other`, else
`false`.
* @example
*
* _.gt(3, 1);
* // => true
*
* _.gt(3, 3);
* // => false
*
* _.gt(1, 3);
* // => false
*/
function gt(value, other) {
return value > other;
}
/**
* Checks if `value` is likely an `arguments` object. * Checks if `value` is likely an `arguments` object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else * @returns {boolean} Returns `true` if `value` is an `arguments` object,
`false`. * else `false`.
* @example * @example
* *
* _.isArguments(function() { return arguments; }()); * _.isArguments(function() { return arguments; }());
* // => true * // => true
* *
* _.isArguments([1, 2, 3]); * _.isArguments([1, 2, 3]);
* // => false * // => false
*/ */
function isArguments(value) { var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIs
// Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode Arguments : function(value) {
. return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
(!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) };
== argsTag);
}
/** /**
* Checks if `value` is classified as an `Array` object. * Checks if `value` is classified as an `Array` object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @type Function * @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is an array, else `false`.
* @example * @example
* *
* _.isArray([1, 2, 3]); * _.isArray([1, 2, 3]);
* // => true * // => true
* *
* _.isArray(document.body.children); * _.isArray(document.body.children);
* // => false * // => false
* *
* _.isArray('abc'); * _.isArray('abc');
* // => false * // => false
skipping to change at line 2473 skipping to change at line 2526
*/ */
var isArray = Array.isArray; var isArray = Array.isArray;
/** /**
* Checks if `value` is array-like. A value is considered array-like if it's * 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 * 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`. * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @type Function * @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is array-like, else `false`. * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
* @example * @example
* *
* _.isArrayLike([1, 2, 3]); * _.isArrayLike([1, 2, 3]);
* // => true * // => true
* *
* _.isArrayLike(document.body.children); * _.isArrayLike(document.body.children);
* // => true * // => true
* *
* _.isArrayLike('abc'); * _.isArrayLike('abc');
* // => true * // => true
* *
* _.isArrayLike(_.noop); * _.isArrayLike(_.noop);
* // => false * // => false
*/ */
function isArrayLike(value) { function isArrayLike(value) {
return value != null && return value != null && isLength(value.length) && !isFunction(value);
!(typeof value == 'function' && isFunction(value)) && isLength(getLength(v
alue));
}
/**
* This method is like `_.isArrayLike` except that it also checks if `value`
* is an object.
*
* @static
* @memberOf _
* @type Function
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array-like object, else
`false`.
* @example
*
* _.isArrayLikeObject([1, 2, 3]);
* // => true
*
* _.isArrayLikeObject(document.body.children);
* // => true
*
* _.isArrayLikeObject('abc');
* // => false
*
* _.isArrayLikeObject(_.noop);
* // => false
*/
function isArrayLikeObject(value) {
return isObjectLike(value) && isArrayLike(value);
} }
/** /**
* Checks if `value` is classified as a boolean primitive or object. * Checks if `value` is classified as a boolean primitive or object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
* @example * @example
* *
* _.isBoolean(false); * _.isBoolean(false);
* // => true * // => true
* *
* _.isBoolean(null); * _.isBoolean(null);
* // => false * // => false
*/ */
function isBoolean(value) { function isBoolean(value) {
return value === true || value === false || return value === true || value === false ||
(isObjectLike(value) && objectToString.call(value) == boolTag); (isObjectLike(value) && baseGetTag(value) == boolTag);
} }
/** /**
* Checks if `value` is classified as a `Date` object. * Checks if `value` is classified as a `Date` object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is a date object, else `false` .
* @example * @example
* *
* _.isDate(new Date); * _.isDate(new Date);
* // => true * // => true
* *
* _.isDate('Mon April 23 2012'); * _.isDate('Mon April 23 2012');
* // => false * // => false
*/ */
function isDate(value) { var isDate = baseIsDate;
return isObjectLike(value) && objectToString.call(value) == dateTag;
}
/** /**
* Checks if `value` is empty. A value is considered empty unless it's an * Checks if `value` is an empty object, collection, map, or set.
* `arguments` object, array, string, or jQuery-like collection with a length *
* greater than `0` or an object with own enumerable properties. * 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 * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {Array|Object|string} value The value to inspect. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is empty, else `false`. * @returns {boolean} Returns `true` if `value` is empty, else `false`.
* @example * @example
* *
* _.isEmpty(null); * _.isEmpty(null);
* // => true * // => true
* *
* _.isEmpty(true); * _.isEmpty(true);
* // => true * // => true
* *
* _.isEmpty(1); * _.isEmpty(1);
* // => true * // => true
* *
* _.isEmpty([1, 2, 3]); * _.isEmpty([1, 2, 3]);
* // => false * // => false
* *
* _.isEmpty({ 'a': 1 }); * _.isEmpty({ 'a': 1 });
* // => false * // => false
*/ */
function isEmpty(value) { function isEmpty(value) {
return (!isObjectLike(value) || isFunction(value.splice)) if (isArrayLike(value) &&
? !size(value) (isArray(value) || isString(value) ||
: !keys(value).length; isFunction(value.splice) || isArguments(value))) {
return !value.length;
}
return !nativeKeys(value).length;
} }
/** /**
* Performs a deep comparison between two values to determine if they are * Performs a deep comparison between two values to determine if they are
* equivalent. * equivalent.
* *
* **Note:** This method supports comparing arrays, array buffers, booleans, * **Note:** This method supports comparing arrays, array buffers, booleans,
* date objects, error objects, maps, numbers, `Object` objects, regexes, * date objects, error objects, maps, numbers, `Object` objects, regexes,
* sets, strings, symbols, and typed arrays. `Object` objects are compared * sets, strings, symbols, and typed arrays. `Object` objects are compared
* by their own, not inherited, enumerable properties. Functions and DOM * by their own, not inherited, enumerable properties. Functions and DOM
* nodes are **not** supported. * nodes are compared by strict equality, i.e. `===`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to compare. * @param {*} value The value to compare.
* @param {*} other The other value to compare. * @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false `. * @returns {boolean} Returns `true` if the values are equivalent, else `false `.
* @example * @example
* *
* var object = { 'user': 'fred' }; * var object = { 'a': 1 };
* var other = { 'user': 'fred' }; * var other = { 'a': 1 };
* *
* _.isEqual(object, other); * _.isEqual(object, other);
* // => true * // => true
* *
* object === other; * object === other;
* // => false * // => false
*/ */
function isEqual(value, other) { function isEqual(value, other) {
return baseIsEqual(value, other); return baseIsEqual(value, other);
} }
/** /**
* Checks if `value` is a finite primitive number. * Checks if `value` is a finite primitive number.
* *
* **Note:** This method is based on [`Number.isFinite`](https://mdn.io/Number * **Note:** This method is based on
/isFinite). * [`Number.isFinite`](https://mdn.io/Number/isFinite).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a finite number, else `fals e`. * @returns {boolean} Returns `true` if `value` is a finite number, else `fals e`.
* @example * @example
* *
* _.isFinite(3); * _.isFinite(3);
* // => true * // => true
* *
* _.isFinite(Number.MAX_VALUE); * _.isFinite(Number.MIN_VALUE);
* // => true
*
* _.isFinite(3.14);
* // => true * // => true
* *
* _.isFinite(Infinity); * _.isFinite(Infinity);
* // => false * // => false
*
* _.isFinite('3');
* // => false
*/ */
function isFinite(value) { function isFinite(value) {
return typeof value == 'number' && nativeIsFinite(value); return typeof value == 'number' && nativeIsFinite(value);
} }
/** /**
* Checks if `value` is classified as a `Function` object. * Checks if `value` is classified as a `Function` object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is a function, else `false`.
* @example * @example
* *
* _.isFunction(_); * _.isFunction(_);
* // => true * // => true
* *
* _.isFunction(/abc/); * _.isFunction(/abc/);
* // => false * // => false
*/ */
function isFunction(value) { function isFunction(value) {
if (!isObject(value)) {
return false;
}
// The use of `Object#toString` avoids issues with the `typeof` operator // The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 8 which returns 'object' for typed array constructors, and // in Safari 9 which returns 'object' for typed arrays and other constructor
// PhantomJS 1.9 which returns 'function' for `NodeList` instances. s.
var tag = isObject(value) ? objectToString.call(value) : ''; var tag = baseGetTag(value);
return tag == funcTag || tag == genTag; return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag
;
} }
/** /**
* Checks if `value` is a valid array-like length. * Checks if `value` is a valid array-like length.
* *
* **Note:** This function is loosely based on [`ToLength`](http://ecma-intern * **Note:** This method is loosely based on
ational.org/ecma-262/6.0/#sec-tolength). * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a valid length, else `false `. * @returns {boolean} Returns `true` if `value` is a valid length, else `false `.
* @example * @example
* *
* _.isLength(3); * _.isLength(3);
* // => true * // => true
* *
* _.isLength(Number.MIN_VALUE); * _.isLength(Number.MIN_VALUE);
* // => false * // => false
* *
* _.isLength(Infinity); * _.isLength(Infinity);
* // => false * // => false
* *
* _.isLength('3'); * _.isLength('3');
* // => false * // => false
*/ */
function isLength(value) { function isLength(value) {
return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= return typeof value == 'number' &&
MAX_SAFE_INTEGER; value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
} }
/** /**
* Checks if `value` is the [language type](https://es5.github.io/#x8) of `Obj * Checks if `value` is the
ect`. * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascr
* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String ipt-language-types)
('')`) * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, an
d `new String('')`)
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`. * @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example * @example
* *
* _.isObject({}); * _.isObject({});
* // => true * // => true
* *
* _.isObject([1, 2, 3]); * _.isObject([1, 2, 3]);
* // => true * // => true
* *
* _.isObject(_.noop); * _.isObject(_.noop);
* // => true * // => true
* *
* _.isObject(null); * _.isObject(null);
* // => false * // => false
*/ */
function isObject(value) { function isObject(value) {
// Avoid a V8 JIT bug in Chrome 19-20.
// See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
var type = typeof value; var type = typeof value;
return !!value && (type == 'object' || type == 'function'); return value != null && (type == 'object' || type == 'function');
} }
/** /**
* Checks if `value` is object-like. A value is object-like if it's not `null` * Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object". * and has a `typeof` result of "object".
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`. * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example * @example
* *
* _.isObjectLike({}); * _.isObjectLike({});
* // => true * // => true
* *
* _.isObjectLike([1, 2, 3]); * _.isObjectLike([1, 2, 3]);
* // => true * // => true
* *
* _.isObjectLike(_.noop); * _.isObjectLike(_.noop);
* // => false * // => false
* *
* _.isObjectLike(null); * _.isObjectLike(null);
* // => false * // => false
*/ */
function isObjectLike(value) { function isObjectLike(value) {
return !!value && typeof value == 'object'; return value != null && typeof value == 'object';
} }
/** /**
* Checks if `value` is `NaN`. * Checks if `value` is `NaN`.
* *
* **Note:** This method is not the same as [`isNaN`](https://es5.github.io/#x * **Note:** This method is based on
15.1.2.4) * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
* which returns `true` for `undefined` and other non-numeric values. * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
* `undefined` and other non-number values.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
* @example * @example
* *
* _.isNaN(NaN); * _.isNaN(NaN);
* // => true * // => true
* *
* _.isNaN(new Number(NaN)); * _.isNaN(new Number(NaN));
* // => true * // => true
* *
* isNaN(undefined); * isNaN(undefined);
* // => true * // => true
* *
* _.isNaN(undefined); * _.isNaN(undefined);
* // => false * // => false
*/ */
function isNaN(value) { function isNaN(value) {
// An `NaN` primitive is the only value that is not equal to itself. // An `NaN` primitive is the only value that is not equal to itself.
// Perform the `toStringTag` check first to avoid errors with some ActiveX o // Perform the `toStringTag` check first to avoid errors with some
bjects in IE. // ActiveX objects in IE.
return isNumber(value) && value != +value; return isNumber(value) && value != +value;
} }
/** /**
* Checks if `value` is `null`. * Checks if `value` is `null`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `null`, else `false`. * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
* @example * @example
* *
* _.isNull(null); * _.isNull(null);
* // => true * // => true
* *
* _.isNull(void 0); * _.isNull(void 0);
* // => false * // => false
*/ */
function isNull(value) { function isNull(value) {
return value === null; return value === null;
} }
/** /**
* Checks if `value` is classified as a `Number` primitive or object. * Checks if `value` is classified as a `Number` primitive or object.
* *
* **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classifi * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
ed * classified as numbers, use the `_.isFinite` method.
* as numbers, use the `_.isFinite` method.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is a number, else `false`.
* @example * @example
* *
* _.isNumber(3); * _.isNumber(3);
* // => true * // => true
* *
* _.isNumber(Number.MIN_VALUE); * _.isNumber(Number.MIN_VALUE);
* // => true * // => true
* *
* _.isNumber(Infinity); * _.isNumber(Infinity);
* // => true * // => true
* *
* _.isNumber('3'); * _.isNumber('3');
* // => false * // => false
*/ */
function isNumber(value) { function isNumber(value) {
return typeof value == 'number' || return typeof value == 'number' ||
(isObjectLike(value) && objectToString.call(value) == numberTag); (isObjectLike(value) && baseGetTag(value) == numberTag);
} }
/** /**
* Checks if `value` is classified as a `RegExp` object. * Checks if `value` is classified as a `RegExp` object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.1.0
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
* @example * @example
* *
* _.isRegExp(/abc/); * _.isRegExp(/abc/);
* // => true * // => true
* *
* _.isRegExp('/abc/'); * _.isRegExp('/abc/');
* // => false * // => false
*/ */
function isRegExp(value) { var isRegExp = baseIsRegExp;
return isObject(value) && objectToString.call(value) == regexpTag;
}
/** /**
* Checks if `value` is classified as a `String` primitive or object. * Checks if `value` is classified as a `String` primitive or object.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. * @returns {boolean} Returns `true` if `value` is a string, else `false`.
* @example * @example
* *
* _.isString('abc'); * _.isString('abc');
* // => true * // => true
* *
* _.isString(1); * _.isString(1);
* // => false * // => false
*/ */
function isString(value) { function isString(value) {
return typeof value == 'string' || return typeof value == 'string' ||
(!isArray(value) && isObjectLike(value) && objectToString.call(value) == s tringTag); (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag) ;
} }
/** /**
* Checks if `value` is `undefined`. * Checks if `value` is `undefined`.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Lang * @category Lang
* @param {*} value The value to check. * @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `undefined`, else `false`. * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
* @example * @example
* *
* _.isUndefined(void 0); * _.isUndefined(void 0);
* // => true * // => true
* *
* _.isUndefined(null); * _.isUndefined(null);
* // => false * // => false
*/ */
function isUndefined(value) { function isUndefined(value) {
return value === undefined; return value === undefined;
} }
/** /**
* Checks if `value` is less than `other`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than `other`, else `fa
lse`.
* @example
*
* _.lt(1, 3);
* // => true
*
* _.lt(3, 3);
* // => false
*
* _.lt(3, 1);
* // => false
*/
function lt(value, other) {
return value < other;
}
/**
* Converts `value` to an array. * Converts `value` to an array.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Lang * @category Lang
* @param {*} value The value to convert. * @param {*} value The value to convert.
* @returns {Array} Returns the converted array. * @returns {Array} Returns the converted array.
* @example * @example
* *
* _.toArray({ 'a': 1, 'b': 2 }); * _.toArray({ 'a': 1, 'b': 2 });
* // => [1, 2] * // => [1, 2]
* *
* _.toArray('abc'); * _.toArray('abc');
skipping to change at line 2964 skipping to change at line 2991
function toArray(value) { function toArray(value) {
if (!isArrayLike(value)) { if (!isArrayLike(value)) {
return values(value); return values(value);
} }
return value.length ? copyArray(value) : []; return value.length ? copyArray(value) : [];
} }
/** /**
* Converts `value` to an integer. * Converts `value` to an integer.
* *
* **Note:** This function is loosely based on [`ToInteger`](http://www.ecma-i * **Note:** This method is loosely based on
nternational.org/ecma-262/6.0/#sec-tointeger). * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger
).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to convert. * @param {*} value The value to convert.
* @returns {number} Returns the converted integer. * @returns {number} Returns the converted integer.
* @example * @example
* *
* _.toInteger(3); * _.toInteger(3.2);
* // => 3 * // => 3
* *
* _.toInteger(Number.MIN_VALUE); * _.toInteger(Number.MIN_VALUE);
* // => 0 * // => 0
* *
* _.toInteger(Infinity); * _.toInteger(Infinity);
* // => 1.7976931348623157e+308 * // => 1.7976931348623157e+308
* *
* _.toInteger('3'); * _.toInteger('3.2');
* // => 3 * // => 3
*/ */
var toInteger = Number; var toInteger = Number;
/** /**
* Converts `value` to a number. * Converts `value` to a number.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to process. * @param {*} value The value to process.
* @returns {number} Returns the number. * @returns {number} Returns the number.
* @example * @example
* *
* _.toNumber(3); * _.toNumber(3.2);
* // => 3 * // => 3.2
* *
* _.toNumber(Number.MIN_VALUE); * _.toNumber(Number.MIN_VALUE);
* // => 5e-324 * // => 5e-324
* *
* _.toNumber(Infinity); * _.toNumber(Infinity);
* // => Infinity * // => Infinity
* *
* _.toNumber('3'); * _.toNumber('3.2');
* // => 3 * // => 3.2
*/ */
var toNumber = Number; var toNumber = Number;
/** /**
* Converts `value` to a string if it's not one. An empty string is returned * Converts `value` to a string. An empty string is returned for `null`
* for `null` and `undefined` values. The sign of `-0` is preserved. * and `undefined` values. The sign of `-0` is preserved.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @category Lang * @category Lang
* @param {*} value The value to process. * @param {*} value The value to convert.
* @returns {string} Returns the string. * @returns {string} Returns the converted string.
* @example * @example
* *
* _.toString(null); * _.toString(null);
* // => '' * // => ''
* *
* _.toString(-0); * _.toString(-0);
* // => '-0' * // => '-0'
* *
* _.toString([1, 2, 3]); * _.toString([1, 2, 3]);
* // => '1,2,3' * // => '1,2,3'
skipping to change at line 3041 skipping to change at line 3072
function toString(value) { function toString(value) {
if (typeof value == 'string') { if (typeof value == 'string') {
return value; return value;
} }
return value == null ? '' : (value + ''); return value == null ? '' : (value + '');
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Assigns own enumerable properties of source objects to the destination * Assigns own enumerable string keyed properties of source objects to the
* object. Source objects are applied from left to right. Subsequent sources * destination object. Source objects are applied from left to right.
* overwrite property assignments of previous sources. * Subsequent sources overwrite property assignments of previous sources.
* *
* **Note:** This method mutates `object` and is loosely based on * **Note:** This method mutates `object` and is loosely based on
* [`Object.assign`](https://mdn.io/Object/assign). * [`Object.assign`](https://mdn.io/Object/assign).
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 0.10.0
* @category Object * @category Object
* @param {Object} object The destination object. * @param {Object} object The destination object.
* @param {...Object} [sources] The source objects. * @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`. * @returns {Object} Returns `object`.
* @see _.assignIn
* @example * @example
* *
* function Foo() { * function Foo() {
* this.c = 3; * this.a = 1;
* } * }
* *
* function Bar() { * function Bar() {
* this.e = 5; * this.c = 3;
* } * }
* *
* Foo.prototype.d = 4; * Foo.prototype.b = 2;
* Bar.prototype.f = 6; * Bar.prototype.d = 4;
* *
* _.assign({ 'a': 1 }, new Foo, new Bar); * _.assign({ 'a': 0 }, new Foo, new Bar);
* // => { 'a': 1, 'c': 3, 'e': 5 } * // => { 'a': 1, 'c': 3 }
*/ */
var assign = createAssigner(function(object, source) { var assign = createAssigner(function(object, source) {
copyObject(source, keys(source), object); copyObject(source, nativeKeys(source), object);
}); });
/** /**
* This method is like `_.assign` except that it iterates over own and * This method is like `_.assign` except that it iterates over own and
* inherited source properties. * inherited source properties.
* *
* **Note:** This method mutates `object`. * **Note:** This method mutates `object`.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 4.0.0
* @alias extend * @alias extend
* @category Object * @category Object
* @param {Object} object The destination object. * @param {Object} object The destination object.
* @param {...Object} [sources] The source objects. * @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`. * @returns {Object} Returns `object`.
* @see _.assign
* @example * @example
* *
* function Foo() { * function Foo() {
* this.b = 2; * this.a = 1;
* } * }
* *
* function Bar() { * function Bar() {
* this.d = 4; * this.c = 3;
* } * }
* *
* Foo.prototype.c = 3; * Foo.prototype.b = 2;
* Bar.prototype.e = 5; * Bar.prototype.d = 4;
* *
* _.assignIn({ 'a': 1 }, new Foo, new Bar); * _.assignIn({ 'a': 0 }, new Foo, new Bar);
* // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 } * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
*/ */
var assignIn = createAssigner(function(object, source) { var assignIn = createAssigner(function(object, source) {
copyObject(source, keysIn(source), object); copyObject(source, nativeKeysIn(source), object);
});
/**
* This method is like `_.assignIn` except that it accepts `customizer` which
* is invoked to produce the assigned values. If `customizer` returns `undefin
ed`
* assignment is handled by the method instead. The `customizer` is invoked
* with five arguments: (objValue, srcValue, key, object, source).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @alias extendWith
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* function customizer(objValue, srcValue) {
* return _.isUndefined(objValue) ? srcValue : objValue;
* }
*
* var defaults = _.partialRight(_.assignInWith, customizer);
*
* defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'a': 1, 'b': 2 }
*/
var assignInWith = createAssigner(function(object, source, customizer) {
copyObjectWith(source, keysIn(source), object, customizer);
}); });
/** /**
* Creates an object that inherits from the `prototype` object. If a `properti * Creates an object that inherits from the `prototype` object. If a
es` * `properties` object is given, its own enumerable string keyed properties
* object is provided its own enumerable properties are assigned to the create * are assigned to the created object.
d object.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 2.3.0
* @category Object * @category Object
* @param {Object} prototype The object to inherit from. * @param {Object} prototype The object to inherit from.
* @param {Object} [properties] The properties to assign to the object. * @param {Object} [properties] The properties to assign to the object.
* @returns {Object} Returns the new object. * @returns {Object} Returns the new object.
* @example * @example
* *
* function Shape() { * function Shape() {
* this.x = 0; * this.x = 0;
* this.y = 0; * this.y = 0;
* } * }
skipping to change at line 3172 skipping to change at line 3178
* *
* var circle = new Circle; * var circle = new Circle;
* circle instanceof Circle; * circle instanceof Circle;
* // => true * // => true
* *
* circle instanceof Shape; * circle instanceof Shape;
* // => true * // => true
*/ */
function create(prototype, properties) { function create(prototype, properties) {
var result = baseCreate(prototype); var result = baseCreate(prototype);
return properties ? assign(result, properties) : result; return properties == null ? result : assign(result, properties);
} }
/** /**
* Assigns own and inherited enumerable properties of source objects to the * Assigns own and inherited enumerable string keyed properties of source
* destination object for all destination properties that resolve to `undefine * objects to the destination object for all destination properties that
d`. * resolve to `undefined`. Source objects are applied from left to right.
* Source objects are applied from left to right. Once a property is set, * Once a property is set, additional values of the same property are ignored.
* additional values of the same property are ignored.
* *
* **Note:** This method mutates `object`. * **Note:** This method mutates `object`.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Object * @category Object
* @param {Object} object The destination object. * @param {Object} object The destination object.
* @param {...Object} [sources] The source objects. * @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`. * @returns {Object} Returns `object`.
* @see _.defaultsDeep
* @example * @example
* *
* _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' }); * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'user': 'barney', 'age': 36 } * // => { 'a': 1, 'b': 2 }
*/ */
var defaults = rest(function(args) { var defaults = baseRest(function(object, sources) {
args.push(undefined, assignInDefaults); object = Object(object);
return assignInWith.apply(undefined, args);
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`. * Checks if `path` is a direct property of `object`.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Object * @category Object
* @param {Object} object The object to query. * @param {Object} object The object to query.
* @param {Array|string} path The path to check. * @param {Array|string} path The path to check.
* @returns {boolean} Returns `true` if `path` exists, else `false`. * @returns {boolean} Returns `true` if `path` exists, else `false`.
* @example * @example
* *
* var object = { 'a': { 'b': { 'c': 3 } } }; * var object = { 'a': { 'b': 2 } };
* var other = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) }); * var other = _.create({ 'a': _.create({ 'b': 2 }) });
* *
* _.has(object, 'a'); * _.has(object, 'a');
* // => true * // => true
* *
* _.has(object, 'a.b.c'); * _.has(object, 'a.b');
* // => true * // => true
* *
* _.has(object, ['a', 'b', 'c']); * _.has(object, ['a', 'b']);
* // => true * // => true
* *
* _.has(other, 'a'); * _.has(other, 'a');
* // => false * // => false
*/ */
function has(object, path) { function has(object, path) {
return object != null && hasOwnProperty.call(object, path); return object != null && hasOwnProperty.call(object, path);
} }
/** /**
* Creates an array of the own enumerable property names of `object`. * Creates an array of the own enumerable property names of `object`.
* *
* **Note:** Non-object values are coerced to objects. See the * **Note:** Non-object values are coerced to objects. See the
* [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys) * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
* for more details. * for more details.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Object * @category Object
* @param {Object} object The object to query. * @param {Object} object The object to query.
* @returns {Array} Returns the array of property names. * @returns {Array} Returns the array of property names.
* @example * @example
* *
* function Foo() { * function Foo() {
* this.a = 1; * this.a = 1;
* this.b = 2; * this.b = 2;
* } * }
* *
* Foo.prototype.c = 3; * Foo.prototype.c = 3;
* *
* _.keys(new Foo); * _.keys(new Foo);
* // => ['a', 'b'] (iteration order is not guaranteed) * // => ['a', 'b'] (iteration order is not guaranteed)
* *
* _.keys('hi'); * _.keys('hi');
* // => ['0', '1'] * // => ['0', '1']
*/ */
function keys(object) { var keys = nativeKeys;
var isProto = isPrototype(object);
if (!(isProto || isArrayLike(object))) {
return baseKeys(object);
}
var indexes = indexKeys(object),
skipIndexes = !!indexes,
result = indexes || [],
length = result.length;
for (var key in object) {
if (hasOwnProperty.call(object, key) &&
!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
!(isProto && key == 'constructor')) {
result.push(key);
}
}
return result;
}
/** /**
* Creates an array of the own and inherited enumerable property names of `obj ect`. * Creates an array of the own and inherited enumerable property names of `obj ect`.
* *
* **Note:** Non-object values are coerced to objects. * **Note:** Non-object values are coerced to objects.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 3.0.0
* @category Object * @category Object
* @param {Object} object The object to query. * @param {Object} object The object to query.
* @returns {Array} Returns the array of property names. * @returns {Array} Returns the array of property names.
* @example * @example
* *
* function Foo() { * function Foo() {
* this.a = 1; * this.a = 1;
* this.b = 2; * this.b = 2;
* } * }
* *
* Foo.prototype.c = 3; * Foo.prototype.c = 3;
* *
* _.keysIn(new Foo); * _.keysIn(new Foo);
* // => ['a', 'b', 'c'] (iteration order is not guaranteed) * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
*/ */
function keysIn(object) { var keysIn = nativeKeysIn;
var index = -1,
isProto = isPrototype(object),
props = baseKeysIn(object),
propsLength = props.length,
indexes = indexKeys(object),
skipIndexes = !!indexes,
result = indexes || [],
length = result.length;
while (++index < propsLength) {
var key = props[index];
if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key
)))) {
result.push(key);
}
}
return result;
}
/** /**
* Creates an object composed of the picked `object` properties. * Creates an object composed of the picked `object` properties.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Object * @category Object
* @param {Object} object The source object. * @param {Object} object The source object.
* @param {...(string|string[])} [props] The property names to pick, specified * @param {...(string|string[])} [paths] The property paths to pick.
* individually or in arrays.
* @returns {Object} Returns the new object. * @returns {Object} Returns the new object.
* @example * @example
* *
* var object = { 'a': 1, 'b': '2', 'c': 3 }; * var object = { 'a': 1, 'b': '2', 'c': 3 };
* *
* _.pick(object, ['a', 'c']); * _.pick(object, ['a', 'c']);
* // => { 'a': 1, 'c': 3 } * // => { 'a': 1, 'c': 3 }
*/ */
var pick = rest(function(object, props) { var pick = flatRest(function(object, paths) {
return object == null ? {} : basePick(object, baseFlatten(props)); return object == null ? {} : basePick(object, paths);
}); });
/** /**
* This method is like `_.get` except that if the resolved value is a function * This method is like `_.get` except that if the resolved value is a
* it's invoked with the `this` binding of its parent object and its result * function it's invoked with the `this` binding of its parent object and
* is returned. * its result is returned.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Object * @category Object
* @param {Object} object The object to query. * @param {Object} object The object to query.
* @param {Array|string} path The path of the property to resolve. * @param {Array|string} path The path of the property to resolve.
* @param {*} [defaultValue] The value returned if the resolved value is `unde fined`. * @param {*} [defaultValue] The value returned for `undefined` resolved value s.
* @returns {*} Returns the resolved value. * @returns {*} Returns the resolved value.
* @example * @example
* *
* var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] }; * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
* *
* _.result(object, 'a[0].b.c1'); * _.result(object, 'a[0].b.c1');
* // => 3 * // => 3
* *
* _.result(object, 'a[0].b.c2'); * _.result(object, 'a[0].b.c2');
* // => 4 * // => 4
skipping to change at line 3376 skipping to change at line 3378
*/ */
function result(object, path, defaultValue) { function result(object, path, defaultValue) {
var value = object == null ? undefined : object[path]; var value = object == null ? undefined : object[path];
if (value === undefined) { if (value === undefined) {
value = defaultValue; value = defaultValue;
} }
return isFunction(value) ? value.call(object) : value; return isFunction(value) ? value.call(object) : value;
} }
/** /**
* Creates an array of the own enumerable property values of `object`. * Creates an array of the own enumerable string keyed property values of `obj ect`.
* *
* **Note:** Non-object values are coerced to objects. * **Note:** Non-object values are coerced to objects.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Object * @category Object
* @param {Object} object The object to query. * @param {Object} object The object to query.
* @returns {Array} Returns the array of property values. * @returns {Array} Returns the array of property values.
* @example * @example
* *
* function Foo() { * function Foo() {
* this.a = 1; * this.a = 1;
* this.b = 2; * this.b = 2;
* } * }
* *
* Foo.prototype.c = 3; * Foo.prototype.c = 3;
* *
* _.values(new Foo); * _.values(new Foo);
* // => [1, 2] (iteration order is not guaranteed) * // => [1, 2] (iteration order is not guaranteed)
* *
* _.values('hi'); * _.values('hi');
* // => ['h', 'i'] * // => ['h', 'i']
*/ */
function values(object) { function values(object) {
return object ? baseValues(object, keys(object)) : []; return object == null ? [] : baseValues(object, keys(object));
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Converts the characters "&", "<", ">", '"', "'", and "\`" in `string` to * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
* their corresponding HTML entities. * corresponding HTML entities.
* *
* **Note:** No other characters are escaped. To escape additional * **Note:** No other characters are escaped. To escape additional
* characters use a third-party library like [_he_](https://mths.be/he). * characters use a third-party library like [_he_](https://mths.be/he).
* *
* Though the ">" character is escaped for symmetry, characters like * Though the ">" character is escaped for symmetry, characters like
* ">" and "/" don't need escaping in HTML and have no special meaning * ">" and "/" don't need escaping in HTML and have no special meaning
* unless they're part of a tag or unquoted attribute value. * unless they're part of a tag or unquoted attribute value. See
* See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-amp * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersa
ersands) nds)
* (under "semi-related fun fact") for more details. * (under "semi-related fun fact") for more details.
* *
* Backticks are escaped because in IE < 9, they can break out of * When working with HTML you should always
* attribute values or HTML comments. See [#59](https://html5sec.org/#59), * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
* [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and * XSS vectors.
* [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https:
//html5sec.org/)
* for more details.
*
* When working with HTML you should always [quote attribute values](http://wo
nko.com/post/html-escaping)
* to reduce XSS vectors.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category String * @category String
* @param {string} [string=''] The string to escape. * @param {string} [string=''] The string to escape.
* @returns {string} Returns the escaped string. * @returns {string} Returns the escaped string.
* @example * @example
* *
* _.escape('fred, barney, & pebbles'); * _.escape('fred, barney, & pebbles');
* // => 'fred, barney, &amp; pebbles' * // => 'fred, barney, &amp; pebbles'
*/ */
function escape(string) { function escape(string) {
string = toString(string); string = toString(string);
return (string && reHasUnescapedHtml.test(string)) return (string && reHasUnescapedHtml.test(string))
? string.replace(reUnescapedHtml, escapeHtmlChar) ? string.replace(reUnescapedHtml, escapeHtmlChar)
: string; : string;
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* This method returns the first argument provided to it. * This method returns the first argument it receives.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Util * @category Util
* @param {*} value Any value. * @param {*} value Any value.
* @returns {*} Returns `value`. * @returns {*} Returns `value`.
* @example * @example
* *
* var object = { 'user': 'fred' }; * var object = { 'a': 1 };
* *
* _.identity(object) === object; * console.log(_.identity(object) === object);
* // => true * // => true
*/ */
function identity(value) { function identity(value) {
return value; return value;
} }
/** /**
* Creates a function that invokes `func` with the arguments of the created * Creates a function that invokes `func` with the arguments of the created
* function. If `func` is a property name the created callback returns the * function. If `func` is a property name, the created function returns the
* property value for a given element. If `func` is an object the created * property value for a given element. If `func` is an array or object, the
* callback returns `true` for elements that contain the equivalent object pro * created function returns `true` for elements that contain the equivalent
perties, otherwise it returns `false`. * source properties, otherwise it returns `false`.
* *
* @static * @static
* @since 4.0.0
* @memberOf _ * @memberOf _
* @category Util * @category Util
* @param {*} [func=_.identity] The value to convert to a callback. * @param {*} [func=_.identity] The value to convert to a callback.
* @returns {Function} Returns the callback. * @returns {Function} Returns the callback.
* @example * @example
* *
* var users = [ * var users = [
* { 'user': 'barney', 'age': 36 }, * { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40 } * { 'user': 'fred', 'age': 40, 'active': false }
* ]; * ];
* *
* // create custom iteratee shorthands * // The `_.matches` iteratee shorthand.
* _.iteratee = _.wrap(_.iteratee, function(callback, func) { * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
* var p = /^(\S+)\s*([<>])\s*(\S+)$/.exec(func); * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
* return !p ? callback(func) : function(object) { *
* return (p[2] == '>' ? object[p[1]] > p[3] : object[p[1]] < p[3]); * // 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(users, 'age > 36'); * _.filter(['abc', 'def'], /ef/);
* // => [{ 'user': 'fred', 'age': 40 }] * // => ['def']
*/ */
var iteratee = baseIteratee; var iteratee = baseIteratee;
/** /**
* Adds all own enumerable function properties of a source object to the * Creates a function that performs a partial deep comparison between a given
* destination object. If `object` is a function then methods are added to * object and `source`, returning `true` if the given object has equivalent
* its prototype as well. * 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.
*
* **Note:** Multiple values can be checked by combining several matchers
* using `_.overSome`
*
* @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 }]
*
* // Checking for several possible values
* _.filter(objects, _.overSome([_.matches({ 'a': 1 }), _.matches({ 'a': 4 })]
));
* // => [{ 'a': 1, 'b': 2, 'c': 3 }, { '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 * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
* avoid conflicts caused by modifying the original. * avoid conflicts caused by modifying the original.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Util * @category Util
* @param {Function|Object} [object=lodash] The destination object. * @param {Function|Object} [object=lodash] The destination object.
* @param {Object} source The object of functions to add. * @param {Object} source The object of functions to add.
* @param {Object} [options] The options object. * @param {Object} [options={}] The options object.
* @param {boolean} [options.chain=true] Specify whether the functions added * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
* are chainable.
* @returns {Function|Object} Returns `object`. * @returns {Function|Object} Returns `object`.
* @example * @example
* *
* function vowels(string) { * function vowels(string) {
* return _.filter(string, function(v) { * return _.filter(string, function(v) {
* return /[aeiou]/i.test(v); * return /[aeiou]/i.test(v);
* }); * });
* } * }
* *
* _.mixin({ 'vowels': vowels }); * _.mixin({ 'vowels': vowels });
skipping to change at line 3544 skipping to change at line 3596
var props = keys(source), var props = keys(source),
methodNames = baseFunctions(source, props); methodNames = baseFunctions(source, props);
if (options == null && if (options == null &&
!(isObject(source) && (methodNames.length || !props.length))) { !(isObject(source) && (methodNames.length || !props.length))) {
options = source; options = source;
source = object; source = object;
object = this; object = this;
methodNames = baseFunctions(source, keys(source)); methodNames = baseFunctions(source, keys(source));
} }
var chain = (isObject(options) && 'chain' in options) ? options.chain : true , var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
isFunc = isFunction(object); isFunc = isFunction(object);
baseEach(methodNames, function(methodName) { baseEach(methodNames, function(methodName) {
var func = source[methodName]; var func = source[methodName];
object[methodName] = func; object[methodName] = func;
if (isFunc) { if (isFunc) {
object.prototype[methodName] = function() { object.prototype[methodName] = function() {
var chainAll = this.__chain__; var chainAll = this.__chain__;
if (chain || chainAll) { if (chain || chainAll) {
var result = object(this.__wrapped__), var result = object(this.__wrapped__),
skipping to change at line 3574 skipping to change at line 3626
}); });
return object; return object;
} }
/** /**
* Reverts the `_` variable to its previous value and returns a reference to * Reverts the `_` variable to its previous value and returns a reference to
* the `lodash` function. * the `lodash` function.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Util * @category Util
* @returns {Function} Returns the `lodash` function. * @returns {Function} Returns the `lodash` function.
* @example * @example
* *
* var lodash = _.noConflict(); * var lodash = _.noConflict();
*/ */
function noConflict() { function noConflict() {
root._ = oldDash; if (root._ === this) {
root._ = oldDash;
}
return this; return this;
} }
/** /**
* A no-operation function that returns `undefined` regardless of the * This method returns `undefined`.
* arguments it receives.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @since 2.3.0
* @category Util * @category Util
* @example * @example
* *
* var object = { 'user': 'fred' }; * _.times(2, _.noop);
* * // => [undefined, undefined]
* _.noop(object) === undefined;
* // => true
*/ */
function noop() { function noop() {
// No operation performed. // No operation performed.
} }
/** /**
* Generates a unique ID. If `prefix` is provided the ID is appended to it. * Generates a unique ID. If `prefix` is given, the ID is appended to it.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Util * @category Util
* @param {string} [prefix] The value to prefix the ID with. * @param {string} [prefix=''] The value to prefix the ID with.
* @returns {string} Returns the unique ID. * @returns {string} Returns the unique ID.
* @example * @example
* *
* _.uniqueId('contact_'); * _.uniqueId('contact_');
* // => 'contact_104' * // => 'contact_104'
* *
* _.uniqueId(); * _.uniqueId();
* // => '105' * // => '105'
*/ */
function uniqueId(prefix) { function uniqueId(prefix) {
var id = ++idCounter; var id = ++idCounter;
return toString(prefix) + id; return toString(prefix) + id;
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* Computes the maximum value of `array`. If `array` is empty or falsey * Computes the maximum value of `array`. If `array` is empty or falsey,
* `undefined` is returned. * `undefined` is returned.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Math * @category Math
* @param {Array} array The array to iterate over. * @param {Array} array The array to iterate over.
* @returns {*} Returns the maximum value. * @returns {*} Returns the maximum value.
* @example * @example
* *
* _.max([4, 2, 8, 6]); * _.max([4, 2, 8, 6]);
* // => 8 * // => 8
* *
* _.max([]); * _.max([]);
* // => undefined * // => undefined
*/ */
function max(array) { function max(array) {
return (array && array.length) return (array && array.length)
? baseExtremum(array, identity, gt) ? baseExtremum(array, identity, baseGt)
: undefined; : undefined;
} }
/** /**
* Computes the minimum value of `array`. If `array` is empty or falsey * Computes the minimum value of `array`. If `array` is empty or falsey,
* `undefined` is returned. * `undefined` is returned.
* *
* @static * @static
* @since 0.1.0
* @memberOf _ * @memberOf _
* @category Math * @category Math
* @param {Array} array The array to iterate over. * @param {Array} array The array to iterate over.
* @returns {*} Returns the minimum value. * @returns {*} Returns the minimum value.
* @example * @example
* *
* _.min([4, 2, 8, 6]); * _.min([4, 2, 8, 6]);
* // => 2 * // => 2
* *
* _.min([]); * _.min([]);
* // => undefined * // => undefined
*/ */
function min(array) { function min(array) {
return (array && array.length) return (array && array.length)
? baseExtremum(array, identity, lt) ? baseExtremum(array, identity, baseLt)
: undefined; : undefined;
} }
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
LodashWrapper.prototype = baseCreate(lodash.prototype); // Add methods that return wrapped values in chain sequences.
LodashWrapper.prototype.constructor = LodashWrapper;
// Add functions that return wrapped values when chaining.
lodash.assignIn = assignIn; lodash.assignIn = assignIn;
lodash.before = before; lodash.before = before;
lodash.bind = bind; lodash.bind = bind;
lodash.chain = chain; lodash.chain = chain;
lodash.compact = compact; lodash.compact = compact;
lodash.concat = concat; lodash.concat = concat;
lodash.create = create; lodash.create = create;
lodash.defaults = defaults; lodash.defaults = defaults;
lodash.defer = defer; lodash.defer = defer;
lodash.delay = delay; lodash.delay = delay;
lodash.filter = filter; lodash.filter = filter;
lodash.flatten = flatten; lodash.flatten = flatten;
lodash.flattenDeep = flattenDeep; lodash.flattenDeep = flattenDeep;
lodash.invokeMap = invokeMap;
lodash.iteratee = iteratee; lodash.iteratee = iteratee;
lodash.keys = keys; lodash.keys = keys;
lodash.map = map; lodash.map = map;
lodash.matches = matches;
lodash.mixin = mixin; lodash.mixin = mixin;
lodash.negate = negate; lodash.negate = negate;
lodash.once = once; lodash.once = once;
lodash.pick = pick; lodash.pick = pick;
lodash.slice = slice; lodash.slice = slice;
lodash.sortBy = sortBy; lodash.sortBy = sortBy;
lodash.tap = tap; lodash.tap = tap;
lodash.thru = thru; lodash.thru = thru;
lodash.toArray = toArray; lodash.toArray = toArray;
lodash.values = values; lodash.values = values;
// Add aliases. // Add aliases.
lodash.each = forEach;
lodash.extend = assignIn; lodash.extend = assignIn;
// Add functions to `lodash.prototype`. // Add methods to `lodash.prototype`.
mixin(lodash, lodash); mixin(lodash, lodash);
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
// Add functions that return unwrapped values when chaining. // Add methods that return unwrapped values in chain sequences.
lodash.clone = clone; lodash.clone = clone;
lodash.escape = escape; lodash.escape = escape;
lodash.every = every; lodash.every = every;
lodash.find = find; lodash.find = find;
lodash.forEach = forEach; lodash.forEach = forEach;
lodash.has = has; lodash.has = has;
lodash.head = head; lodash.head = head;
lodash.identity = identity; lodash.identity = identity;
lodash.indexOf = indexOf; lodash.indexOf = indexOf;
lodash.isArguments = isArguments; lodash.isArguments = isArguments;
skipping to change at line 3746 skipping to change at line 3798
lodash.isNumber = isNumber; lodash.isNumber = isNumber;
lodash.isObject = isObject; lodash.isObject = isObject;
lodash.isRegExp = isRegExp; lodash.isRegExp = isRegExp;
lodash.isString = isString; lodash.isString = isString;
lodash.isUndefined = isUndefined; lodash.isUndefined = isUndefined;
lodash.last = last; lodash.last = last;
lodash.max = max; lodash.max = max;
lodash.min = min; lodash.min = min;
lodash.noConflict = noConflict; lodash.noConflict = noConflict;
lodash.noop = noop; lodash.noop = noop;
lodash.now = now;
lodash.reduce = reduce; lodash.reduce = reduce;
lodash.result = result; lodash.result = result;
lodash.size = size; lodash.size = size;
lodash.some = some; lodash.some = some;
lodash.uniqueId = uniqueId; lodash.uniqueId = uniqueId;
// Add aliases. // Add aliases.
lodash.each = forEach;
lodash.first = head; lodash.first = head;
mixin(lodash, (function() { mixin(lodash, (function() {
var source = {}; var source = {};
baseForOwn(lodash, function(func, methodName) { baseForOwn(lodash, function(func, methodName) {
if (!hasOwnProperty.call(lodash.prototype, methodName)) { if (!hasOwnProperty.call(lodash.prototype, methodName)) {
source[methodName] = func; source[methodName] = func;
} }
}); });
return source; return source;
}()), { 'chain': false }); }()), { 'chain': false });
/*------------------------------------------------------------------------*/ /*------------------------------------------------------------------------*/
/** /**
* The semantic version number. * The semantic version number.
* *
* @static * @static
* @memberOf _ * @memberOf _
* @type string * @type {string}
*/ */
lodash.VERSION = VERSION; lodash.VERSION = VERSION;
// Add `Array` and `String` methods to `lodash.prototype`. // Add `Array` methods to `lodash.prototype`.
baseEach(['pop', 'join', 'replace', 'reverse', 'split', 'push', 'shift', 'sort ', 'splice', 'unshift'], function(methodName) { baseEach(['pop', 'join', 'replace', 'reverse', 'split', 'push', 'shift', 'sort ', 'splice', 'unshift'], function(methodName) {
var func = (/^(?:replace|split)$/.test(methodName) ? String.prototype : arra yProto)[methodName], var func = (/^(?:replace|split)$/.test(methodName) ? String.prototype : arra yProto)[methodName],
chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru', chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
retUnwrapped = /^(?:pop|join|replace|shift)$/.test(methodName); retUnwrapped = /^(?:pop|join|replace|shift)$/.test(methodName);
lodash.prototype[methodName] = function() { lodash.prototype[methodName] = function() {
var args = arguments; var args = arguments;
if (retUnwrapped && !this.__chain__) { if (retUnwrapped && !this.__chain__) {
return func.apply(this.value(), args); var value = this.value();
return func.apply(isArray(value) ? value : [], args);
} }
return this[chainName](function(value) { return this[chainName](function(value) {
return func.apply(value, args); return func.apply(isArray(value) ? value : [], args);
}); });
}; };
}); });
// Add chaining functions to the `lodash` wrapper. // Add chain sequence methods to the `lodash` wrapper.
lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue; lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
/*--------------------------------------------------------------------------*/ /*--------------------------------------------------------------------------*/
// Expose lodash on the free variable `window` or `self` when available. This // Some AMD build optimizers, like r.js, check for condition patterns like:
// prevents errors in cases where lodash is loaded by a script tag in the pres
ence
// of an AMD loader. See http://requirejs.org/docs/errors.html#mismatch for mo
re details.
(freeWindow || freeSelf || {})._ = lodash;
// Some AMD build optimizers like r.js check for condition patterns like the f
ollowing:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd ) { 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 // Define as an anonymous module so, through path mapping, it can be
// referenced as the "underscore" module. // referenced as the "underscore" module.
define(function() { define(function() {
return lodash; return lodash;
}); });
} }
// Check for `exports` after `define` in case a build optimizer adds an `expor // Check for `exports` after `define` in case a build optimizer adds it.
ts` object. else if (freeModule) {
else if (freeExports && freeModule) {
// Export for Node.js. // Export for Node.js.
if (moduleExports) { (freeModule.exports = lodash)._ = lodash;
(freeModule.exports = lodash)._ = lodash;
}
// Export for CommonJS support. // Export for CommonJS support.
freeExports._ = lodash; freeExports._ = lodash;
} }
else { else {
// Export to the global object. // Export to the global object.
root._ = lodash; root._ = lodash;
} }
}.call(this)); }.call(this));
 End of changes. 435 change blocks. 
1181 lines changed or deleted 1195 lines changed or added

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