JavaScript基于对象方法实现数组去重及排序操作示例

<script>  //用对象方法实现数组去重  Array.prototype.unique = function() {    var newArr = [];    for (var i = 0; i < this.length; i++) {      if(newArr.indexOf(this[i]) == -1){        newArr.push(this[i]);      }    }    return newArr;  };  var jarr = [1,2,4,3,45,6,33,4,2];  var unq = jarr.unique();  console.log(unq);  //对结果排序 sort  unq.sort(function compare(a,b){    return a-b; //倒序 b-a  });  console.log(unq);</script>