<script ?type="text/javascript" charset="utf-8" async defer> var arr = [2,1,2,10,2,3,4,1,85,321,3,4,65,10,24]; function uniq(newarr){ ????function toObject(arr) { ????????var obj = { }; ?????????for(var i=0 ;i<arr.length ;i++){ ????????????obj[ arr[ i ] ]=true; ????????????} ????????return obj ; ????} ????function keys(obj){ ????????var arr = [ ] ; ????????????for(var attr in obj){ ????????????????if(obj.hasOwnProperty(attr)){ ????????????????????arr.push(parseInt(attr)); ????????????????} ????????????} ????????return arr; ????} return keys(toObject(newarr)); } console.log(uniq(arr));