AngularJS：如何获得一个JSON对象的关键 [英] AngularJS: How to get the key of a JSON Object

问题描述

我不能确定这是否已经得到了什么与所有AngularJS，如果它仅仅是JSON有关。

总之，让我们说，我们有以下JSON：

  $ scope.dataSets = {
    名字：贺，斯拉格霍恩，西弗勒斯，斯内普]，
    性别：男，女]
}
 

现在，我使用的是NG-重复指令打印上面如下：

 ＆LT; D​​IV NG重复=数据集＆GT;
    //继续readig知道我在这里expcting
＆LT; / DIV＆GT;
 

我有什么期望的＆LT中; DIV＆GT;＆LT; / DIV＆GT; 标签是打印名和性别。也就是说，我要打印的JSON的钥匙。我不知道键是什么，在他们可以是任何东西。我怎样才能做到这一点？

解决方案

作为文档说明吧：

  

的（键，值）前pression - 其中key和value可以是任何用户定义的标识符，和前pression是范围前pression给集合枚举<。 / EM>

 ＆LT; D​​IV NG重复=（键，数据）的数据集＆GT;
  {{键}}
＆LT; / DIV＆GT;
 

I am unsure if this has got anything to do with AngularJS at all and if it is only JSON related.

Anyhow, let us say that we have the following JSON:

$scope.dataSets = {
    "names": ["Horace", "Slughorn", "Severus", "Snape"],
    "genders": ["Male", "Female"]
}

Now, I am using the ng-repeat directive to print the above as follows:

<div ng-repeat="data in dataSets>
    //Continue readig to know what I am expcting here
</div>

What I expect within the <div></div> tags is to print "name" and "genders". That is, I wish to print the keys of the JSON. I have no idea what the keys are, as in they could be anything. How can I do this?

解决方案

As docs state it:

(key, value) in expression – where key and value can be any user defined identifiers, and expression is the scope expression giving the collection to enumerate.

<div ng-repeat="(key, data) in dataSets">
  {{key}}
</div>

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