union<T> function

Set<T> union<T>(Iterable<Iterable<T>> iterables)

Returns a new set containing every (distinct) value that appears in any of the given iterables.

The order of values in the returned set is based on their first occurrence in the given iterables.

union([[0, 2, 1, 0], [1, 3]]) // {0, 2, 1, 3}

Implementation

Set<T> union<T>(Iterable<Iterable<T>> iterables) {
  final set = <T>{};
  for (final other in iterables) {
    for (final o in other) {
      set.add(o);
    }
  }
  return set;
}