Lo-Dash v0.9.2

A utility library delivering consistency, customization, performance, & extras.

Download

• Development build
• Production build
• Underscore build tailored for projects already using Underscore
• CDN copies of ≤ v0.9.2’s Production, Underscore, and Development builds are available on cdnjs thanks to CloudFlare
• For optimal file size, create a custom build with only the features you need

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:

• Introducing Lo-Dash
• Lo-Dash optimizations and custom builds
• Lo-Dash’s origin and why it’s a better utility belt
• Unit testing in Lo-Dash
• Lo-Dash’s approach to native method use

Features

• AMD loader support (RequireJS, curl.js, etc.)
• _.clone supports “deep” cloning
• _.contains accepts a fromIndex argument
• _.forEach is chainable and supports exiting iteration early
• _.forIn for iterating over an object’s own and inherited properties
• _.forOwn for iterating over an object’s own properties
• _.isPlainObject checks if values are created by the Object constructor
• _.lateBind for late binding
• _.merge for a “deep” _.extend
• _.partial for partial application without this binding
• _.pick and _.omit accepts callback and thisArg arguments
• _.template supports ES6 delimiters and utilizes sourceURLs for easier debugging
• _.contains, _.size, _.toArray, and more… accept strings

Support

Lo-Dash has been tested in at least Chrome 5~23, Firefox 1~16, IE 6-10, Opera 9.25-12, Safari 3-6, Node.js 0.4.8-0.8.14, Narwhal 0.3.2, RingoJS 0.8, and Rhino 1.7RC5.

Installation and usage

In browsers:

<script src="lodash.js"></script>

Using npm:

npm install lodash

npm install -g lodash
npm link lodash

In Node.js and RingoJS v0.8.0+:

var _ = require('lodash');

Note: If Lo-Dash is installed globally, run npm link lodash in your project’s root directory before requiring it.

In 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);
});

Resolved Underscore.js issues

• Allow iteration of objects with a length property [#799, test]
• Fix cross-browser object iteration bugs [#60, #376, test]
• Methods should work on pages with incorrectly shimmed native methods [#7, #742, test]
• _.isEmpty should support jQuery/MooTools DOM query collections [#690, test]
• _.isObject should avoid V8 bug #2291 [#605, test]
• _.keys should work with arguments objects cross-browser [#396, test]
• _.range should coerce arguments to numbers [#634, #683, test]

Release Notes

^v0.9.2

• Added fromIndex argument to _.contains
• Added moduleId build option
• Added Closure Compiler “simple” optimizations to the build process
• Added support for strings in _.max and _.min
• Added support for ES6 template delimiters to _.template
• Ensured re-minification of Lo-Dash by third parties avoids Closure Compiler bugs
• Optimized _.every, _.find, _.some, and _.uniq

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

John-David Dalton

Contributors

Blaine Bublitz	Kit Cambridge	Mathias Bynens