code: function _uniqItems(items) {
    var tmp = [];
    Util.each(items, function (item) {
      var index = _indexOfArray(tmp, item);
      if (index === -1) {
        tmp.push(item);
      } else {
        tmp[index] = item;
      }
    });
    return tmp;
  }
docs: 去除重复的值, 去除不同图形相同数据，只展示一份即可