如何迭代对象中的内部对象/属性 [英] how to iterate over inner objects / property in an object

问题描述

我有一个对象，其内部对象和属性定义如下：

I have an object which has inner objects and properties defined like this:

var obj = {obj1 : { "prop1" : "nothing", "prop2" : "prop"},
        obj2 : {"prop1" : "nothing", "prop2" : "prop"},
        pr1 : "message",
        pr2 : "mess"
};

通常迭代对象的每个属性， for .. in loop可以解决这个问题

Normally to iterate every property of an object , the for .. in loop can do the trick

for (property in obj){
    if (obj.hasOwnProperty(property)){
        console.log(property + "   " + obj[property]);
    }
}

控制台显示：

obj1 [object Object]
obj12 [object Object]
pr1 message
pr2 mess

但是如何迭代内部对象（ obj1，obj2 ）和他们自己的属性（ prop1，prop2 ）？

However how to iterate the inner objects (obj1, obj2) and their own properties (prop1,prop2) ?

推荐答案

递归是你的朋友：

function iterate(obj) {
    for (var property in obj) {
        if (obj.hasOwnProperty(property)) {
            if (typeof obj[property] == "object")
                iterate(obj[property]);
            else
                console.log(property + "   " + obj[property]);
        }
    }
}

注意：不要忘记在本地使用 var 声明属性！

Note: don't forget to declare property locally using var!

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