Provides an extension method to convert enum values to a map

enum_to_map.dart

void main() {
  // {Animals.cat: 0, Animals.dog: 1, Animals.pig: 2}
  print(Animals.values.toMap());
}

extension EnumHelper<E extends Enum> on Iterable<E> {
  Map<E, int> toMap() {
    return {for (final v in this) v: v.index};
  }
}

enum Animals {
  cat,
  dog,
  pig,
}