<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>javascript数组去重算法-----3</title>
</head>
<body>
<script>
var arrDemo = new Array();
arrDemo[0] = 10;
arrDemo[1] = 50;
arrDemo[2] = 51;
arrDemo[3] = 100;
arrDemo.sort(); //调用sort方法后，数组本身会被改变，即影响原数组
console.log(arrDemo);//10,100,50,51 默认情况下sort方法是按ascii字母顺序排序的，而非我们认为是按数字大小排序
arrDemo.sort(function(a,b){return a>b?1:-1});//从小到大排序
console.log(arrDemo);//10,50,51,100
arrDemo.sort(function(a,b){return a<b?1:-1});//从大到小排序
console.log(arrDemo);
</script>
</body>
</html>
