description

# union method

Set<E> union(

1. Set<E> other

)
override

Creates a new set which contains all the elements of this set and `other`.

That is, the returned set contains all the elements of this Set and all the elements of `other`.

    final characters1 = <String>{'A', 'B', 'C'};
    final characters2 = <String>{'A', 'E', 'F'};
    final unionSet1 = characters1.union(characters2);
    print(unionSet1); // {A, B, C, E, F}
    final unionSet2 = characters2.union(characters1);
    print(unionSet2); // {A, E, F, B, C}

## Implementation

    Set<E> union(Set<E> other) {
      return _clone()..addAll(other);
    }