io.js 关于「继承」的实现: https://github.com/iojs/io.js/blob/master/lib/util.js#L718 Node.js 关于 「继承」的实现: https://github.com/joyent/node/blob/master/lib/util.js#L634 Underscore.js https://github.com/jashkenas/underscore/blob/master/underscore.js#L102...