jQuery插件，创建了一个数组扩展阵列和可枚举函数原型

This jQuery plugin creates and array with Prototypes array and enumerable functions, and allows chaining the way that Prototype does. Syntax: // this does not extend the array. var arr = [1,2,3,4,5,6]; $.protify(arr).findAll(function(a) { return a <=3 }); // --> [1,2,3] //this does extend the array, but only for this object. $.protify(arr, true); arr.findAll(function(a) { return a <=3 }); // --> [1,2,3] [1,2,3,4,5,6].findAll(function(a) { return a <=3 }); // --> error, findAll is not a function