按具有日期值的单个键对对象数组进行排序 [英] Sort array of objects by single key with date value

问题描述

我有一个包含多个键值对的对象数组，我需要根据updated_at"对它们进行排序:

<预><代码>[{"updated_at" : "2012-01-01T06:25:24Z",foo":酒吧"},{"updated_at" : "2012-01-09T11:25:13Z",foo":酒吧"},{"updated_at" : "2012-01-05T04:13:24Z",foo":酒吧"}]

最有效的方法是什么?

解决方案

您可以使用 Array.sort.

这是一个例子:

var arr = [{"updated_at": "2012-01-01T06:25:24Z","foo": "酒吧"},{"updated_at": "2012-01-09T11:25:13Z","foo": "酒吧"},{"updated_at": "2012-01-05T04:13:24Z","foo": "酒吧"}]arr.sort(function(a, b) {var keyA = new Date(a.updated_at),keyB = 新日期(b.updated_at);//比较两个日期if (keyA < keyB) 返回 -1;如果 (keyA > keyB) 返回 1;返回0；});console.log(arr);

I have an array of objects with several key value pairs, and I need to sort them based on 'updated_at':

[
    {
        "updated_at" : "2012-01-01T06:25:24Z",
        "foo" : "bar"
    },
    {
        "updated_at" : "2012-01-09T11:25:13Z",
        "foo" : "bar"
    },
    {
        "updated_at" : "2012-01-05T04:13:24Z",
        "foo" : "bar"
    }
]

What's the most efficient way to do so?

解决方案

You can use Array.sort.

Here's an example:

var arr = [{
    "updated_at": "2012-01-01T06:25:24Z",
    "foo": "bar"
  },
  {
    "updated_at": "2012-01-09T11:25:13Z",
    "foo": "bar"
  },
  {
    "updated_at": "2012-01-05T04:13:24Z",
    "foo": "bar"
  }
]

arr.sort(function(a, b) {
  var keyA = new Date(a.updated_at),
    keyB = new Date(b.updated_at);
  // Compare the 2 dates
  if (keyA < keyB) return -1;
  if (keyA > keyB) return 1;
  return 0;
});

console.log(arr);

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