Javascript通过布尔属性对对象进行排序 [英] Javascript sort array of objects by a boolean property

问题描述

请参阅最后的修改以了解实际问题.

See edit at end for actual problem.

好，我有这种情况:

a = [false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]

然后，如果我这样做:

a.sort(function(a,b){return !a && b});

它给了我这个

[false, false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false]

这有点儿在排序...但不完全是...:(

It's sorta doing a sort... but not quite... :(

如何对数组进行排序?

如果您想知道为什么我不只使用a.sort()是因为我的实际数组是对象，而不是像我发布的数组那样的普通数组.真正的元素具有看起来像[{xx:true}，{xx:false}，...]

If you are wondering why I did not use just a.sort() is because my actual array is of objects, not a plain array like the one I posted. The real one has elements that look like [{xx:true},{xx:false},...]

推荐答案

a = [false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false];
    
    
    a.sort(function(x, y) {
        // true values first
        return (x === y)? 0 : x? -1 : 1;
        // false values first
        // return (x === y)? 0 : x? 1 : -1;
    });
    
    console.log(a);

当a和b的值相同时，您必须返回0；如果a为true，则必须返回-1，否则返回1.

You must return 0 when a and b both have the same value, -1 if a is true and 1 otherwise.

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