【算法递归练习题】计算数组01

    <script type="text/javascript">
      let array = [5, [[4, 3], 2, 1]];
      let result = a(array);
      function a(value) {
        let result = 0;
        for (let index = 0; index < value.length; index++) {
          if (index == 0 && !(value[index] instanceof Array)) {
            result += value[index];
          } else if (index == 0 && value[index] instanceof Array) {
            result += a(value[index]);
          } else if (index > 0 && value[index] instanceof Array) {
            result -= a(value[index]);
          } else {
            result -= value[index];
          }
        }
        return result;
      }

      console.log("计算结果：" + result);
    </script>

PS：多刷算法题，多多益善，注意总结。