js数组去重。。(拷的别人代码)

?

1 2 3 4 5 6 7 8 9 10 11

function unique(arr) {     var result = [], hash = {};     for (var i = 0, elem; (elem = arr[i]) != null; i++) {         if (!hash[elem]) {             result.push(elem);             hash[elem] = true;         }     }     return result;     //http://www.cnblogs.com/sosoft/ }