获取angularjs中的对象长度未定义 [英] Get the object length in angularjs is undefined

问题描述

如何获取物体长度?

在控制台中，我的对象如下所示:

In console my object looks like this:

Object {
 2: true,
 3: true,
 4: true
}

.length将给我未定义.我只想获取这种情况下的results = 3.

.length will give me undefined. I just want to get the results = 3 for this case.

推荐答案

var keys = Object.keys(objInstance);
var len = keys.length;

len是您的长度".

Where len is your "length."

在某些情况下，我可能还没有想到这是行不通的，但是在给定示例的情况下，它应该可以满足您的需要.

There may be circumstances I haven't thought of where this doesn't work, but it should do what you need, given your example.

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