问题描述

如何按时间戳对这个数组进行排序，最快的方法是什么(数组有很多条目)?

how can i sort this array by timestamp and what is the fastest way (array has many many entries)?

我的数组

  myList = new Array();

  myList[0]               = {};
  myList[0]['title']      = 'I am really new';
  myList[0]['timestamp']  = 1317039046;
  myList[0]['date']       = '2011-09-26T12:10:46+00:00'; 

  myList[1]               = {};
  myList[1]['title']      = 'I am the oldest';
  myList[1]['timestamp']  = 1315656646;
  myList[1]['date']       = '2011-09-10T12:10:46+00:00';

  myList[2]               = {};
  myList[2]['title']      = 'I am older';
  myList[2]['timestamp']  = 1316866246;
  myList[2]['date']       = '2011-09-24T12:10:46+00:00';

  myList[3]               = {};
  myList[3]['title']      = 'I am old';
  myList[3]['timestamp']  = 1316952646;
  myList[3]['date']       = '2011-09-25T12:10:46+00:00';

示例
http://jsbin.com/ejagup/2/edit#preview

推荐答案

myList.sort(function(x, y){
    return x.timestamp - y.timestamp;
})

myList 是一个 JavaScript 数组，支持 sort 方法.该方法接受一个函数作为参数，该函数根据返回值对数组进行排序.

myList is a JavaScript array, which supports the sort method. This method accepts a function as argument, which sorts the array according to the returned value.

目前，排序算法会将时间戳最低的元素放在最前面.如果你想在另一个方向对数组进行排序，交换 x.timestamp 和 y.timestamp.

Currently, the sort algorithm will place the element with the lowest timestamp first. Swap x.timestamp and y.timestamp if you want to sort the array in the other direction.

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