JavaScript循环遍历JSON数组? [英] JavaScript loop through JSON array?

问题描述

我正在尝试遍历以下 json 数组:

I am trying to loop through the following json array:

{
  "id": "1",
  "msg": "hi",
  "tid": "2013-05-05 23:35",
  "fromWho": "[e-mail]"
}, {
  "id": "2",
  "msg": "there",
  "tid": "2013-05-05 23:45",
  "fromWho": "[e-mail]"
}

并尝试了以下

for (var key in data) {
   if (data.hasOwnProperty(key)) {
      console.log(data[key].id);
   }
}

但由于某种原因，我只得到第一部分，id 1 值.

But for some reason I'm only getting the first part, id 1 values.

有什么想法吗?

推荐答案

您的 JSON 应该如下所示:

Your JSON should look like this:

var json = [{
    "id" : "1", 
    "msg"   : "hi",
    "tid" : "2013-05-05 23:35",
    "fromWho": "[e-mail]"
},
{
    "id" : "2", 
    "msg"   : "there",
    "tid" : "2013-05-05 23:45",
    "fromWho": "[e-mail]"
}];

你可以像这样循环数组:

You can loop over the Array like this:

for(var i = 0; i < json.length; i++) {
    var obj = json[i];

    console.log(obj.id);
}

或者像这样(由 Eric 建议)小心 IE 支持

Or like this (suggested from Eric) be careful with IE support

json.forEach(function(obj) { console.log(obj.id); });

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