js循环比较每个

bubbleSort(arr) {
      console.log(arr);
      let that = this;
      let ck = true;

      let arr_copy = arr.concat();

      console.log("----length--", arr.length);

      for (var i = 0; i < arr.length; i++) {
        arr_copy.shift();
        for (var j = 0; j < arr_copy.length; j++) {
          //  console.log(i, j);
          //  console.log(arr[i], arr_copy[j]);

          if (that.isOverlap(arr[i], arr_copy[j])) {
            return (
              arr[i]["mark"] + " 与 " + arr_copy[j]["mark"] + " 区域重合,请修改"
            );
          }
        }
      }
      return 1;
    },