30秒学会 Dart 片段 – dropRight

Returns a new list with n elements removed from the right.

Use List.sublist() to remove the specified number of elements from the right.

代码实现

List<T> dropRight<T>(List<T> lst, [int n = 1]) {
  return lst.sublist(0, lst.length - n);
}

使用样例

dropRight([1, 2, 3]); // [1,2]
dropRight([1, 2, 3], 2); // [1]