复制JS的Excel排序的最佳方法是什么?

假设我有一个包含项目的数组:

[6,0.75]
[6,0.81]
[9,0.75]
[4,0.20]


通过第一个键对它们进行排序很容易,但是如何复制“ then by”排序呢? Excel将使用第一键说明和第二键说明输出以下结果:

[9,0.75]
[6,0.81]
[6,0.75]
[4,0.20]

最佳答案

对于给定的示例,有更简单的方法可以执行此操作,但是在一般情况下,您可以将函数传递给sort方法,该方法将按指定顺序比较每对值。 (jsfiddle

var arr1 = [[6, 0.75], [6, 0.81], [9, 0.75], [4, 0.20]],
    arr2 = [[6, 0.75], [6, 0.81], [9, 0.75], [4, 0.20]],
people = [{name: 'Jim', age: 40}, {name: 'Sally', age: 35},
          {name: 'Tim', age: 20}, {name: 'Jim', age: 72}];

function orderedComparison(indices) {
    return function(a, b) {
        for (var i = 0; i < indices.length; i++) {
            if (a[indices[i]] > b[indices[i]]) return 1;
            if (a[indices[i]] < b[indices[i]]) return -1;
            // (if a == b, check next index)
        }
    }
}
// sort by first item in each pair, then 2nd
arr1.sort(orderedComparison([0, 1]));
console.log(arr1);
// sort by 2nd item then 1st
arr2.sort(orderedComparison([1, 0]));
console.log(arr2);
people.sort(orderedComparison(['name', 'age']));
console.log(people);​


请注意,下面的代码可能会起作用,但先按低优先级键排序,然后再按高优先级键排序,但是它是not guaranteed to

arr1.sort(function(a, b) {return a[1] - b[1]});
arr1.sort(function(a, b) {return a[0] - b[0]});

10-07 22:20
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