js数组去重

 1 var result = new Array();//去重后结果数组
 2 var arr=[1,2,3,4,5,1,2,3,10];//需去重的数组
 3     var hash = {};
 4     for (var i = 0, elem; (elem=arr[i])!= null; i++) {
 5         if (!hash[elem]) {
 6             result.push(elem);
 7             hash[elem] = true;
 8         }
 9     }
10 console.info(result);
11 VM1823:11 [1, 2, 3, 4, 5, 10]