完美的js继承

//完美的js继承 少了类管理器
Object.extend=function(){
    var fnTest = /\b_super\b/;
    //继承父类
    var _super = arguments[0].prototype||this.prototype;

    var prototype=Object.create(_super)

    //初始化函数ctor
    var _Class=function(){
        if (this.ctor)
            this.ctor.apply(this, arguments);
    }
    _Class.prototype = prototype;

    //当前类属性和方法
    var prop = arguments[arguments.length-1];
    for (var name in prop) {
        var isFunc = (typeof prop[name] === "function");
        var override = (typeof _super[name] === "function");
        var hasSuperCall = fnTest.test(prop[name]);

        if (isFunc && override && hasSuperCall) {
            prototype[name] = (function (name, fn) {
                return function () {
                    var tmp = this._super;
                    this._super = _super[name];
                    var ret = fn.apply(this, arguments);
                    this._super = tmp;
                    return ret;
                };
            })(name, prop[name]);
        } else {
            prototype[name] = prop[name];
        }
    }

    //类继承
    _Class.extend=Object.extend;
    //类扩展
    _Class.expand = function (prop) {
        for (var name in prop) {
            prototype[name] = prop[name];
        }
    };
    return _Class

}
var pointArray=Object.extend(Array,{
    ctor:function(){
        Array.prototype.push.apply(this,arguments)
    }

})
console.log(pointArray)
var arr=new pointArray(2,5)

console.log(arr)
console.log(arr.push(4))