Underscore.js 1.9.0 发布，JavaScript 实用功能库

Underscore.js 1.9.0 已发布，Underscore 是一个 JavaScript 工具库，提供了一整套函数式编程的实用功能，但是没有扩展任何 JavaScript 内置对象。

更新内容：

• Adds the _.restArguments function for variadic function handling.
• Adds the _.chunk function for chunking up an array.
• Adds a _.isSymbol, _.isMap, _.isWeakMap, _.isSet and _.isWeakSet functions.
• _.throttle and _.debounce return functions that now have a .cancel() method, which can be used to cancel any scheduled calls.
• _.property now accepts arrays of keys and indexes as path specifiers, for looking up a deep properties of a value.
• _.range now accepts negative ranges to generate descending arrays.
• Adds support for several environments including: WebWorkers, browserify and ES6 imports.
• The placeholder used for partial is now configurable by setting_.partial.placeholder.
• _.bindAll now accepts arrays or arguments for keys.
• Three years of performance improvements.

 下载地址：

• http://underscorejs.org/