Underscore is a utility-belt library for JavaScript that provides a lot of the functional programming support that you would expect in Prototype.js (or Ruby), but without extending any of the built-in JavaScript objects. It's the tie to go along with jQuery's tux.
Underscore is a utility-belt library for JavaScript that provides a lot of the functional programming support that you would expect in Prototype.js (or Ruby), but without extending any of the built-in JavaScript objects. It's the tie to go along with jQuery's tux and Backbone.js's suspenders.
Underscore provides 80-odd functions that support both the usual functional suspects: map, select, invoke — as well as more specialized helpers: function binding, JavaScript templating, deep equality testing and so on. It delegates to built-in functions, if present, so that modern browsers will use the native implementations of forEach, map, reduce, filter, every, some and indexOf.
Useful links:
- Underscore.js website
- Source code on Github
- Annotated source code
- Test & Benchmark Suite
- IRC:
#documentcloudon freenode
