js的sort不加函数的时候是将数组里面的每个item转换为字符串，然后比较每个子字符串第一个字符的

Question

const numArr = [2, 4, 8, 609545, 2, 8, 4, 1, 10, 123, 99];const strArr = ["what", "We", "have", "lost", "will", "never"];console.log(strArr.sort());console.log(numArr.sort());

Answer 1

The sort() method sorts the elements of an array in place and returns the array. The sort is not necessarily stable. The default sort order is according to string Unicode code points.

是Unicode，别的语言也需要排序。

Array.prototype.sort()