Javascript - 按多个标准排序数组 [英] Javascript - sorting array by multiple criteria

问题描述

我有一个对象数组：

var arr = [
  {title:'50 - 50'},
  {title:'100 - 100'},
  {title:'50 - 65'},
  {title:'100 - 125'}
];

我正在尝试对此数组进行排序，以便项目按以下顺序显示：

I'm attempting to sort this array so that the items appear in the following order:

var arr = [
  {title:'50 - 50'},
  {title:'50 - 65'},
  {title:'100 - 100'},
  {title:'100 - 125'}
];

目前我正在使用以下排序功能来尝试：

Currently I'm using the following sorting function to attempt this:

arr.sort(function(a, b){
  var titleA = a.title;
  var titleB = b.title;
  var arrA = titleA.split(' - ');
  var arrB = titleB.split(' - ');
  var keyA = parseInt(arrA[0]), 
      keyB = parseInt(arrB[0]);

  // Compare the 2 keys
  if(keyA < keyB) return -1;
  if(keyA > keyB) return 1;
  return 0;
});

但是，这将按以下顺序返回项目：

However, this returns the items in the following order:

var arr = [
  {title:'50 - 65'},
  {title:'50 - 50'},
  {title:'100 - 125'},
  {title:'100 - 100'}
];

看起来我需要按标题中的第一个数字排序，然后排序第二个数字。有什么想法？

It looks like I need to sort by the first number in the title and then the second number. Any ideas?

推荐答案

试试这个：

arr.sort(function(a, b){
  var titleA = a.title;
  var titleB = b.title;
  var arrA = titleA.split(' - ');
  var arrB = titleB.split(' - ');
  var keyA1 = parseInt(arrA[0]), keyA2 = parseInt(arrA[1]) 
      keyB1 = parseInt(arrB[0]), keyB2 = parseInt(arrB[1]);

  // Compare the 2 keys
  if (keyA1 < keyB1) return -1;
  if (keyA1 > keyB1) return 1;
  if (keyA2 < keyB2) return -1;
  if (keyA2 > keyB2) return 1;
  return 0;
});

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