Javascript：多维数组排序

Javascript: Sort Multidimensional Array

提问by Joe Yan

I have a Multidimensional Array which has 3 columns (by using javascript)

我有一个多维数组，它有 3 列（通过使用 javascript）

[0] Number of vote
[1] Name of candidate
[2] Candidate Number

My array contents are:

我的数组内容是：

1 | Peter | 3
1 | Mary  | 2
0 | David | 5
0 | John  | 4
0 | Billy | 1

How can I sort the array by [0] Number of voteand then [2] candidate number?

如何按 [0]票数然后按 [2]候选人编号对数组进行排序？

The result should be:

结果应该是：

1 | Mary  | 2
1 | Peter | 3
0 | Billy | 1
0 | John  | 4
0 | David | 5

回答by Bojan Bjelic

As previously said, you should use a custom sort function. Here's one that would do exactly what you want.

如前所述，您应该使用自定义排序函数。这是一个可以完全按照您的要求执行的操作。

var arr = [];
arr[0] = [1, 'Peter', 3];
arr[1] = [1, 'Mary', 2];
arr[2] = [0, 'David', 5];
arr[3] = [0, 'John', 4];
arr[4] = [0, 'Billy', 1];

arr.sort(function (a,b) {
    if (a[0] < b[0]) return  1;
    if (a[0] > b[0]) return -1;
    if (a[2] > b[2]) return  1;
    if (a[2] < b[2]) return -1;
    return 0;
});

回答by Shock

array.sort( function (a,b) {
    if (a[0] > b[0]) return  1;
    if (a[0] < b[0]) return -1;
    if (a[2] > b[2]) return  1;
    if (a[2] < b[2]) return -1;
    return 0;
});

回答by Shadow

As far as I know you will have to make your own sorting function.
If you can store it in a object than defining a function like in the previous answer will do the job.
Refer Sort array of objects

据我所知，您将必须制作自己的排序功能。
如果您可以将它存储在一个对象中，而不是像前面的答案那样定义一个函数就可以完成这项工作。
请参阅排序对象数组

回答by Nilesh

Here is a generic function

这是一个通用函数

function arraySort(pArray)
{
pArray.sort(
  function(a,b)
  {
    var len=a.length;
    for (var i=0;i<len;i++)
    {
      if (a[i]>b[i]) return 1;
      else if (a[i]<b[i]) return -1;
    }
    return 0;
  }
);
}

回答by JMP

Another method is to create a value for each array entry, e.g. 1000*number of votes + candidate number, so that this value is unambiguous and unique, e.g. we get 1003, 1002, 5, 4, 1. Add a key refering back to the original array and sort.

另一种方法是为每个数组条目创建一个值，例如 1000*投票数 + 候选人数，以便该值明确且唯一，例如我们得到 1003, 1002, 5, 4, 1。添加一个引用回的键原始数组并排序。

So we would sort [[1003,0],[1002,1],[5,2],[4,3],[1,4]] by the first element of each subarray.

所以我们将按每个子数组的第一个元素对 [[1003,0],[1002,1],[5,2],[4,3],[1,4]] 进行排序。

There is a discrepancy in your sorting system, you use high->low for votes and low-high for candidate number.

您的排序系统存在差异，您使用高->低选票，低-高选票。

回答by user2314737

To sort a multi-dimensional array comparing by coordinate 0 first and then by component 2 you can combine two compare functions with ||:

要首先按坐标 0 比较然后按组件 2 对多维数组进行排序，您可以将两个比较函数与 结合使用||：

compare 0-coordinates ||compare 2-coordinates

比较 0 坐标 ||比较 2 坐标

For numeric values simply use a difference as a compare function, as x - yis:

对于数值，只需将差值用作比较函数，如下所示x - y：

• 0 if x == y
• >0 if x > y
• <0 if x < y

• 0 如果 x == y
• >0 如果 x > y
• <0 如果 x < y

Adjust the order of the elements in the differences to take care of ascending/descending order.

调整差异中元素的顺序以处理升序/降序。

var myArray = [
  [1, 'Peter', 3],
  [1, 'Mary', 2],
  [0, 'David', 5],
  [0, 'John', 4],
  [0, 'Billy', 1]
];

myArray.sort(function(a, b) {
  return b[0] - a[0] || a[2] - b[2];
});

console.log(JSON.stringify(myArray));