Underscore.js 1.7.0

An utility-belt library for JavaScript, providing functional programming aid
Portions of Underscore are inspired by or borrowed from Oliver Steele's Functional, Prototype.js and John Resig's Micro-Templating.

Functional programming support is added, but without extending any of the built-in JavaScript objects.

Underscore provides 60-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 modern browsers will use the native implementations of forEach, map, reduce, filter, every, some and indexOf.

Ports of Underscore.js are available for:
PHP
Python
Perl

last updated on:
September 2nd, 2014, 22:06 GMT
price:
FREE!
developed by:
Jeremy Ashkenas
homepage:
underscorejs.org
license type:

MIT License

operating system(s):
Windows / Linux / Mac OS / BSD / Solaris
category:
C: \ Development Tools \ Other Libraries
Underscore.js
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What's New in This Release:
  • For consistency and speed across browsers, Underscore now ignores native array methods for forEach, map, reduce, reduceRight, filter, every, some, indexOf, and lastIndexOf. "Sparse" arrays are officially dead in Underscore.
  • Added _.iteratee to customize the iterators used by collection functions. Many Underscore methods will take a string argument for easier _.property-style lookups, an object for _.where-style filtering, or a function as a custom callback.
  • Added _.before as a counterpart to _.after.
  • Added _.negate to invert the truth value of a passed-in predicate.
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