<script>

Function.prototype.myBind

? Function.prototype.myBind

: Function.prototype.myBind = function(thisObj){

if(typeof this !== "function"){ return;}

var fn = this;

var args = Array.prototype.slice.call(arguments,1);

var funExcessive = function(){};

var funBuild = function(){

//处理new判断

var _this = this instanceof fn ? this : thisObj

// return fn.call(_this, args.concat.apply(args, arguments)) =>自行理解函数将函数参数打散

//以上方法貌似有问题？？？

// return fn.apply(_this, args.concat.apply(args, arguments))

return fn.apply(_this, args.concat(Array.prototype.slice.call(arguments)))

};

funExcessive.prototype = fn.prototype;

funBuild.prototype = new funExcessive();

// funBuild.prototype = Object.create(fn.prototype);

return funBuild;

};

//简易版 => var self = this;

(function(){

var obj = {

hitch: function(scope, callBack){

return function(){

callBack.apply(scope, arguments || []);

}

}

};

window.sname = "wq";

var o = {

sname:"wangqi",

get:function(){

var self = this;

setTimeout(obj.hitch(self, function(){

console.log(this, "o.get");

}))

}

};

o.get();

})();

</script>