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    lodash
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    0.4.2 • Public • Published

    Lo-Dash v0.4.2

    A drop-in replacement* for Underscore.js, from the devs behind jsPerf.com, that delivers performance improvements, bug fixes, and additional features.

    Lo-Dash’s performance is gained by avoiding slower native methods, instead opting for simplified non-ES5 compliant methods optimized for common usage, and by leveraging function compilation to reduce the number of overall function calls.

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    Dive in

    We’ve got API docs, benchmarks, and unit tests.

    Create your own benchmarks at jsPerf, or search for existing ones.

    For a list of upcoming features, check out our roadmap.

    Screencasts

    For more information check out these screencasts over Lo-Dash:

    Features

    Support

    Lo-Dash has been tested in at least Chrome 5-20, Firefox 1.5-13, IE 6-9, Opera 9.25-12, Safari 3.0.4-5.1.7, Node.js 0.4.8-0.8.2, Narwhal 0.3.2, RingoJS 0.8, and Rhino 1.7RC3.

    Custom builds

    Custom builds make it easy to create lightweight versions of Lo-Dash containing only the methods you need. We handle all the method dependency and alias mapping for you.

    • Backbone builds, containing all methods required by Backbone, may be created using the backbone modifier argument.
    lodash backbone
    • Legacy builds, tailored for older browsers without ES5 support, may be created using the legacy modifier argument.
    lodash legacy
    • Mobile builds, with IE < 9 bug fixes and method compilation removed, may be created using the mobile modifier argument.
    lodash mobile
    • Strict builds, with _.bindAll, _.extend, and _.defaults in strict mode, may be created using the strict modifier argument.
    lodash strict

    Custom builds may be created in three ways:

    1. Use the category argument to pass the categories of methods to include in the build.
      Valid categories are "arrays", "chaining", "collections", "functions", "objects", and "utilities".
    lodash category=collections,functions
    lodash category="collections, functions"
    1. Use the exclude argument to pass the names of methods to exclude from the build.
    lodash exclude=union,uniq,zip
    lodash exclude="union, uniq, zip"
    1. Use the include argument to pass the names of methods to include in the build.
    lodash include=each,filter,map
    lodash include="each, filter, map"

    All arguments, except exclude with include and legacy with mobile, may be combined.

    lodash backbone legacy category=utilities exclude=first,last
    lodash backbone mobile strict category=functions include=pick,uniq

    The lodash command-line utility is available when Lo-Dash is installed as a global package (i.e. npm install -g lodash).

    Custom builds are saved to lodash.custom.js and lodash.custom.min.js.

    Installation and usage

    In browsers:

    <script src="lodash.js"></script>

    Using npm:

    npm install lodash
    npm install -g lodash

    In Node.js and RingoJS v0.8.0+:

    var _ = require('lodash');

    In Narwhal and RingoJS v0.7.0-:

    var _ = require('lodash')._;

    In Rhino:

    load('lodash.js');

    In an AMD loader like RequireJS:

    require({
      'paths': {
        'underscore': 'path/to/lodash'
      }
    },
    ['underscore'], function(_) {
      console.log(_.VERSION);
    });

    Closed Underscore.js issues (20+)

    • Allow iteration of objects with a length property [#148, #154, #252, #448, #659, test]
    • Ensure array-like objects with invalid length properties are treated like regular objects [test, test, test]
    • Ensure "Arrays" methods allow falsey array arguments [test]
    • Ensure "Collections" methods allow string collection arguments [#247, #276, #561, test, test, test, test]
    • Ensure templates compiled with errors are inspectable [#666, test]
    • Fix cross-browser object iteration bugs [#376, test, test, test, test, test, test]
    • Handle arrays with undefined values correctly in IE < 9 [#601]
    • Methods should work on pages with incorrectly shimmed native methods [#7, test]
    • Register as an AMD module, but still export to global [#431, test]
    • _(…) should return passed wrapper instances [test]
    • _.contains should work with strings [#667, test]
    • _.escape should return an empty string when passed null or undefined [#407, test]
    • _.forEach should be chainable [#142, test]
    • _.groupBy should add values to own, not inherited, properties [test]
    • _isNaN(new Number(NaN)) should return true [test]
    • _.reduceRight should pass correct callback arguments when iterating objects [test]
    • _.size should return the length of string values [test]
    • _.size shouldn't error on falsey values [#650, test]
    • _.size should work with arguments objects cross-browser [#653, test]
    • _.sortedIndex should support arrays with high length values [test]
    • _.template should not augment the options object [test]
    • _.throttle should work when called in a loop [#502, test]
    • _.zipObject should accept less than two arguments [test]

    Optimized methods (50+)

    • _.bind
    • _.bindAll
    • _.clone
    • _.compact
    • _.contains, _.include
    • _.defaults
    • _.defer
    • _.difference
    • _.each
    • _.escape
    • _.every, _.all
    • _.extend
    • _.filter, _.select
    • _.find, _.detect
    • _.flatten
    • _.forEach, _.each
    • _.functions, _.methods
    • _.groupBy
    • _.indexOf
    • _.intersection
    • _.invoke
    • _.isArguments
    • _.isDate
    • _.isEmpty
    • _.isEqual
    • _.isFinite
    • _.isFunction
    • _.isObject
    • _.isNumber
    • _.isRegExp
    • _.isString
    • _.keys
    • _.lastIndexOf
    • _.map, _.collect
    • _.max
    • _.memoize
    • _.min
    • _.mixin
    • _.pick
    • _.pluck
    • _.reduce, _.foldl, _.inject
    • _.reject
    • _.result
    • _.shuffle
    • _.some, _.any
    • _.sortBy
    • _.sortedIndex
    • _.template
    • _.throttle
    • _.times
    • _.toArray
    • _.union
    • _.uniq, _.unique
    • _.values
    • _.without
    • _.wrap
    • _.zip
    • plus all _(…) method wrappers

    Release Notes

    v0.4.2

    • Added strict build
    • Ensured _.bindAll, _.extend, and _.defaults avoid strict mode errors when attempting to augment read-only properties
    • Optimized the iteration of large arrays in _.difference, _.intersection, and _.without
    • Fixed build bugs related to removing variables

    v0.4.1

    • Fixed _.template regression
    • Optimized build process to detect and remove more unused variables

    v0.4.0

    • Added bin and scripts entries to package.json
    • Added legacy build option
    • Added cross-browser support for passing strings to "Collections" methods
    • Added _.zipObject
    • Leveraged _.indexOf's fromIndex in _.difference and _.without
    • Optimized compiled templates
    • Optimized inlining the iteratorTemplate for builds
    • Optimized object iteration for "Collections" methods
    • Optimized partially applied _.bind in V8
    • Made compiled templates more debuggable
    • Made _.size work with falsey values and consistent cross-browser with arguments objects
    • Moved _.groupBy and _.sortBy back to the "Collections" category
    • Removed arguments object from _.range

    The full changelog is available here.

    BestieJS

    Lo-Dash is part of the BestieJS "Best in Class" module collection. This means we promote solid browser/environment support, ES5 precedents, unit testing, and plenty of documentation.

    Author

    Contributors

    Install

    npm i [email protected]4.2

    Version

    0.4.2

    License

    MIT

    Homepage

    lodash.com/

    Last publish

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