又是关于闭包的疑问,比较高级的疑问

[ykl4452]

        var outwrap = function(){
            this.heihei = function(){
            };
            this.heihei.prototype = {
                b: (this.bb = function(){
                    var md = this;
                    return function(){
                        return md;
                    }
                })()
            };
        };
        var o = new outwrap();
        alert(o.bb);
        var h = new o.heihei();
        alert(h.b() == window);

h.b() == window结果为true,非常疑惑,为什么h.b()的结果不是o,而是window呢,哪位高人帮忙解惑一下,谢谢

[kuty77]

都是高手啊

[tfwin2]

理解了一点点 thanks 高手们

[sharpidd]

学习了

[gavin41]

关注

[chenzhaochun]

纯粹路过~友情一顶~

[helloquixote02]

mark

[天乐_那由他]

气氛很好，跑来学习

[nwao7890]

mark

[lsd123]

.

[mvpoeiu]

看不太明白的~~

[cchaha]

关注

[xwuxin]

分太少了

[young1177]

顶

[_loehuang_]

学习

[Thinking_In_IT]

折腾明白 又有什么用？有这时间 让我想想怎么去赚更多的钱~


技术再强，不给您工资 您愿意嘛？

[xz22503c]

顶 顶 顶 顶 顶 顶 顶

[马尾]

谢谢LS 的解惑！
真的学习了。
路还很长。继续走！

[Eversnow]

When a function is not the property of an object, then it is invoked as a function:

var sum = add(3, 4);    // sum is 7


When a function is invoked with this pattern, this is bound to the global object. This was a mistake in the design of the language. Had the language been designed correctly, when the inner function is invoked, this would still be bound to the this variable of the outer function. A consequence of this error is that a method cannot employ an inner function to help it do its work because the inner function does not share the method's access to the object as its this is bound to the wrong value. Fortunately, there is an easy workaround. If the method defines a variable and assigns it the value of this, the inner function will have access to this through that variable. By convention, the name of that variable is that:

// Augment myObject with a double method.

myObject.double = function (  ) {
    var that = this;    // Workaround.

    var helper = function (  ) {
        that.value = add(that.value, that.value)
    };

    helper(  );    // Invoke helper as a function.
};

// Invoke double as a method.

myObject.double(  );
document.writeln(myObject.getValue(  ));    // 6

[newgoody]

学习了 真是太深了

[赵国胖胖]

学习了,我这个菜鸟要到什么时候才能长起来啊