qq_38057434的博客

var arr = [1, 2, 3, 4]; for (let i = 0; i < arr.length; i++) { for (let j = arr.length - 1; j > i; j--) { if (arr[i] % 2 == 0) { let n = arr[i]; arr[i] = arr[j]; arr[j] = n; } } } console.log(arr);// .