mapOrElse<U> method

@override @useResult U mapOrElse<U>(U map(T value), U calculateDefaultValue())

Returns the contained value, if any, with map applied to it, or the result of calculateDefaultValue otherwise.

Examples

// prints "some: 2"
print(const Some(2).mapOrElse((value) => 'some: $value', () => 'none'));

// prints "none"
print(const None<int>().mapOrElse((value) => 'some: $value', () => 'none'));

Implementation

@override
@useResult
U mapOrElse<U>(U Function(T value) map, U Function() calculateDefaultValue) {
  return calculateDefaultValue();
}