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js对数组排序

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>test</title></head><body>    </body></html><script type="text/javascript">var arr=[1,2,2,3,4,1,2,3,4,5,222,5,6,7,6,7,6,7,8,9,111]var re=[];var json={};for (var i = 0; i < arr.length; i++) {    if(!json[arr[i]]){        re.push(arr[i])        json[arr[i]]=true;    }};console.log(re)var arr2=[1,2,2,3,4,1,2,3,4,5,222,5,6,7,6,7,6,7,8,9,111]arr2.sort();var rr=[];for (var i = 0; i < arr2.length; i++) {    if (rr[rr.length-1]!=arr2[i]) {        rr.push(arr2[i]);    };};console.log(rr)</script>

俩方法,都是网上找的,不过已经琢磨清楚了,这样算是自己的了吧

js对数组排序