删除数组中重复对象

删除数组中重复对象方法
代码如下：
参数：obj—>是数组

 delObj(obj) {
      var uniques = [];
      var stringify = {};
      for (var i = 0; i < obj.length; i++) {
        var keys = Object.keys(obj[i]);
        keys.sort(function (a, b) {
          return (Number(a) - Number(b));
        });
        var str = '';
        for (var j = 0; j < keys.length; j++) {
          str += JSON.stringify(keys[j]);
          str += JSON.stringify(obj[i][keys[j]]);
        }
        if (!stringify.hasOwnProperty(str)) {
          uniques.push(obj[i]);
          stringify[str] = true;
        }
      }
      uniques = uniques;
      return uniques;
    },