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Dart| Flutter How to: Check sublist contains all elements in List


This tutorial shows how to check sublist exists in Dart or Flutter List

How to check sublist exists in a list of  Dart and Flutter

How do Check sub lists exist in a list of dart/flutter?

dart list provides multiple ways to check the sub list contains in the list of elements.

First Convert list into set using Set.of() method Check sub list exists in Set using Set.containsAll() method

Here is an example code

void main() {
  var list = [1, 4, 5, 2, 8];
  var sublist = [1, 4];
  var set = Set.of(list);

  print(set.containsAll(sublist)); //true
  print(set.containsAll([2, 3])); //false
}

  • using enumerable except method except for checking all the elements in the sublist that exists in a list and returning empty if found, else non-empty list.

Check isEmpty() returns true if list is empty

import 'package:enumerable/enumerable.dart';

void main() {
  var list = [1, 4, 5, 2, 8];
  var sublist = [1, 4];

  print(sublist.except(list).isEmpty); //true
  print([2, 3].except(list).isEmpty); //false
}

Conclusion

To summarize, Learn how to check the sublist contains all elements in a list dart and flutter.

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