lodash JavaScript 实用工具库

lodash 是一个 JavaScript 实用工具库，提供一致性，模块化，性能和配件等功能。

_.assign({ 'a': 1 }, { 'b': 2 }, { 'c': 3 });
// → { 'a': 1, 'b': 2, 'c': 3 }
_.map([1, 2, 3], Function(n) { return n * 3; });
// → [3, 6, 9]

当前支持 Chrome 39-40, Firefox 34-35, IE 6-11, Opera 25-26, Safari 5-8, IO.js 1.0.4, Node.js 0.8.28 & 0.10.35, PhantomJS 1.9.8, RinGoJS 0.11, & Rhino 1.7RC5。

方法包括：

• ~100% code coverage

• Follows semantic versioning for releases

• Lazily evaluated chaiNing

• _(…) supports intuitive chaining

• _.ary & _.rearg to change function argument limits & oRDEr

• _.at for cherry-picking collection values

• _.attempt to execute functions which may error without a try-catch

• _.before to complement _.after

• _.bindKey for BINDing “lazy” defined methods

• _.chunk for splitting an array into chunks of a given size

• _.clone supports shallow cloning of Date & RegExp objects

• _.cloneDeep for deep cloning arrays & objects

• _.create for easier object inheritance

• _.curry & _.curryRight for creating curried functions

• _.debounce & _.throttle are cancelable & accept options for more control

• _.findIndex & _.findKey for finding indexes & keys

• _.flow to complement _.flowRight (a.k.a _.compose)

• _.forEach supports exiting early

• _.forIn for iteRATing all enumerable properties

• _.forOwn for iterating own properties

• _.includes accepts a fromIndex

• _.isError to check for error objects

• _.isNative to check for native functions

• _.isPlainObject & _.toPlainObject to check for & convert to Object objects

• _.isTypedArray to check for typed arrays

• _.keysIn & _.valuesIn for getting keys & values of all enumerable properties

• _.mapValues for mapping values to an object

• _.merge for a deep _.extend

• _.parseInt for coNSIStent cross-environment behavior

• _.pull, _.pullAt, & _.remove for mutating arrays

• _.random supports returning floating-POInt numbers

• _.runInContext for collisionLess mixins & easier mocking

• _.slice for creating subsets of array-like values

• _.sortByAll for sorting by multiple properties

• _.support for flagging environment features

• _.template supports “imports” options & ES template delimiters

• _.transform as a powerful alternative to _.reduce for transforming objects

• _.thru to pass values thru method chains

• _.where supports deep object comparisons

• _.xor to complement _.difference, _.intersection, & _.union

• _.bind, _.curry, _.partial, & more support customizable argument plACEholders

• _.capitalize, _.trim, & more string methods

• _.clone, _.isEqual, & more accept callbacks

• _.dropWhile, _.takeWhile, & more to complement _.first, _.initial, _.last, & _.rest

• _.findLast, _.findLastIndex, & more right-associative methods

• _.includes, _.toArray, & more accept strings