我如何为我的列表设置限制<list.filled> Dart 的构造函数？</list.filled>

Question

I just started learning Dart recently but I don't know how to set a limit for my Lists, Here is an example:

  void main(){

var list = List(3);
list.add(2);
list.add(2);
list.add(2);
list.add(2);
list.add(2);

 print(list);

of course, I should get an error but I don't know how to do the same with <List.filled>.

Answer 1

You can set the growable attribute.

final myList = List<int>.filled(3, 0, growable: false);

With growable: false , the length of the list is fixed.