dart - How to check if sublist exists in list?

Question

How to check if one list contains another? .contains allow only single value.

import 'dart:io';
void main() {
  List<int> mylist_1 = [1,3,5,2,7,8];
  List<int> mylist_2 = [1,3,2];
}

I need to check if mylist_1 have mylist_2. Any order of elements in list.

question from:https://stackoverflow.com/questions/65938960/how-to-check-if-sublist-exists-in-list

Answer 1

If you don't care about checking for duplicates, you can achieve this by converting the first List into a Set and then calling containsAll against the second List:

bool listContainsAll<T>(List<T> a, List<T> b) {
  final setA = Set.of(a);
  return setA.containsAll(b);
}