Flutter Dart 切割数组为若干等分数组

splitList<T>(List<T> list, int len) {
  if (len <= 1) {
    return [list];
  }

  List<List<T>> result = [];
  int index = 1;

  while (true) {
    if (index * len < list.length) {
      List<T> temp = list.skip((index - 1) * len).take(len).toList();
      result.add(temp);
      index++;
      continue;
    }
    List<T> temp = list.skip((index - 1) * len).toList();
    result.add(temp);
    break;
  }
  return result;
}

var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19];

void main() {
  print(splitList(a, 2));  // [[0, 1], [2, 3], [4, 5], [6, 7], [8, 9], [10, 11], [12, 13], [14, 15], [16, 17], [18, 19]]

}