1、a-b升序
<script> ???var arr = [2, 3, 1, 5, 0]; ???function compare(a, b) { ???????return a - b; ???} ???console.log(arr.sort(compare));//(5) [0, 1, 2, 3, 5]</script>2、b-a降序
<script> ???var arr = [2, 3, 1, 5, 0]; ???function compare(a, b) { ???????return b - a; ???} ???console.log(arr.sort(compare));//(5) [5, 3, 2, 1, 0]</script>3、返回值：1升序，-1降序
<script> ???var arr = [2, 3, 1, 5, 0]; ???function compare(a, b) { ???????if (a > b) { ???????????return -1; ???????} else if (a < b) { ???????????return 1; ???????} else { ???????????return 0; ???????} ???} ???console.log(arr.sort(compare));//(5) [5, 3, 2, 1, 0]</script>Json——sort
原文地址：http://www.cnblogs.com/wuqiuxue/p/7852835.html