JavaScript的数组排序与顺序排列对齐 [英] javascript sort array to align with order array

问题描述

下面是一个例子：

            //    0     1       2      3       4
 var people = ['jack','jill','nancy','tom','cartman'];
 var order  = [3,1,4,0,2];

 // somehow sort people array to the order specified in the order array

          //  3      1       4        0      2
 people == ['tom','jill','cartman','jack','nancy'];

我以前用过的.sort具有的功能，但我仍然在这一个损失。

I have used .sort with a function before, but am still at a loss on this one.

更新

看到一些答案后，我简直不敢相信这不是明显对我。所以，因为有许多方法可以做到这一点，获奖者将被jsperf决定。

after seeing some answers, I can't believe this was not obvious to me. So as there are many ways to do this, winner will be determined by jsperf.

（也是我upvoting大家一起工作的答案）

(also I am upvoting everyone with a working answer)

的比赛！ http://jsperf.com/array-sorted-to-order-array3

The RACE! http://jsperf.com/array-sorted-to-order-array3

推荐答案

订单是索引数组。因此，只要通过迭代，拉出你想要的值spcified的顺序，使得一个新的数组。

order is an array of indicies. So just iterate through that, pulling out the values you want in the order spcified, making a new array.

var people = ['jack','jill','nancy','tom','cartman'];
var order  = [3,1,4,0,2];

var sorted = [];
for (var i = 0; i < order.length; i++) {
  var desiredIndex = order[i];
  sorted.push(people[desiredIndex]);
}

console.log(sorted);
// ["tom", "jill", "cartman", "jack", "nancy"]

有时排序是不是排序。有时候，你只需要通过从你的其他事情拉取数据做一个新的东西。

Sometimes sorting isn't "sorting". Sometimes you just need to make a new thing by pulling data from your other things.

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