通过javascript中的“函数”对象循环

Question

我有这个项目，我想合并一个＆＃34;功能＆＃34;具有现有对象的对象（与JSON对象 - 对象文字形成对比）。我希望公开显示＆＃34;＆＃34;属性。但是，当我在循环中执行时，它们不会显示出来。他们不会触发内部的console.log()。我怎么得到它们？

//obj passed to extend() by external caller
//this is what obj it looked like when i console.log()'ed it
obj = function() {

    //skip these private ones
    var imPrivate = 'i should not be included';
    function imGetter() {}

    //i want these guys below:
    this.getter = imGetter;
    this.imPublic = "i should be included";

}

function extend(obj){
    console.log('i can see here');

    for (var key in obj) {
        console.log('you cannot see here');
    }​

    //...more of our code here
}

Answer 1

在调用函数之前，这些属性不存在。

在var foo = new obj();后，您会看到the properties（在foo上）。

或者，移动设置属性的代码，使其为outside the function。

Answer 2

你可以自己执行：

var obj={};
(function(ns) { //skip these private ones   
    var imPrivate = 'i should not be included';

    function imGetter() {};
    //i want these guys below:  
    ns.getter = imGetter;
    ns.imPublic = "i should be included";
})(obj)
console.log('i can see here');
for (var key in obj) {
    console.log('you cannot see here '+key+" holds:"+obj[key]);
}