Lo-dash

Note translator: underscore.js is one of the most famous and favorite javascript libraries. But few people know that there is her more successful clone. In one of our projects, we switched to it without any problems and now we decided to introduce other Habrahabr readers to it.

Lo-Dash is a full replacement ^* for Underscore.js . Lo-dash has better performance, is spared from some underscore bugs and gives some new features.

New opportunities:

• AMD boot loader support ( RequireJS , curl.js , etc.)
• _.clone supports deep cloning
• _.forEach supports fluid interface and stop iteration
• _.forIn to _.forIn on proper and inherited properties of objects
• _.forOwn to _.forOwn only on the object's own properties.
• _.isPlainObject checks if the value was created using the Object constructor
• _.lateBind for late binding
• _.merge - “deep” analogue of _.extend
• _.partial for currying without binding this
• _.pick and _.omit accept callback and thisArg
• _.template uses sourceURLs for easier debugging
• _.contains , _.size , _.toArray , etc. ... accept strings too

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Custom builds

Support for custom builds makes it easy to create lightweight versions of Lo-Dash containing only the methods you need. Lo-Dash also supports method dependencies and aliases for you.

• An assembly containing everything necessary for the operation of Backbone can be created with the backbone modifier.
  

   lodash backbone 

• Content Security Policy assembly.
  

   lodash csp 

• Build for older browsers without ES5 support .
  

   lodash legacy 

• Assemblies for mobile platforms, without bug fixes for IE <9 and compilation methods.
  

   lodash mobile 

• Strict builds using strict mode for _.bindAll , _.defaults , and _.extend .
  

   lodash strict 

• Underscore build, for those who already use Underscore in their projects.
  

   lodash underscore 

and so on

Where to go, where to go?

• Lo-Dash on Github
• Install Lo-Dash
• API documentation
• Benchmarks + more benchmarks on jsPerf.com (in my case they give acceleration 1.75 times)
• Unit tests