sort排序

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#1 Created at ... [Delete] [Delete and Lock User]

var arr = [10, 20, 1, 2];

function sortNumber(n1, n2) {
    return n1 - n2;
}

arr.sort(sortNumber); // [1, 2, 10, 20]

#2 Created at ... [Delete] [Delete and Lock User]

小于0就行不用是－1吗？

#3 Created at ... [Delete] [Delete and Lock User]

这个写法很机智,新技能GET!