Some Dart Nullable Noodlings

nullable-noodles.dart

void main() async {
  oneWay();
  anotherWay();
  orThisWay();
}

String? getNullable() {
  if (DateTime.now().second % 2 == 0) {
    return 'not null';
  }
  return null;
}

void oneWay() {
  String? nilMaybe = getNullable();
  final String notNil = (nilMaybe != null) ? nilMaybe : '(null)';
  print('Result: $notNil');
}

void anotherWay() {
  String? nilMaybe = getNullable();
  if (nilMaybe != null) {
    processNonNull(nilMaybe);
  } else {
    print('...was null');
  }
}

void processNonNull(String cannotBeNull) {
  print('Processed: $cannotBeNull');
}

void orThisWay() {
  String? nilMaybe = getNullable();
  processNonNull(nilMaybe ?? '(null)');
}