Return multiple values from function

Question

Is there a way to return several values in a function return statement (other than returning an object) like we can do in Go (or some other languages)?

For example, in Go we can do:

func vals() (int, int) {
    return 3, 7
}

Can this be done in Dart? Something like this:

int, String foo() {
    return 42, "foobar";
} 

Answer 1

Updated for Dart 3.0

In Dart 3.0 records can be used

• https://medium.com/dartlang/announcing-dart-3-53f065a10635
• https://dart.dev/language/records

(int, String) foo() {
    return (42, "foobar");
} 

void main() {
  var (a,b) = foo();
  print("int: ${a}");
  print("String: ${b}");
}

Original answer

Dart doesn't support multiple return values.

You can return an array,

List foo() {
  return [42, "foobar"];
}

or if you want the values be typed use a Tuple class like the package https://pub.dev/packages/tuple provides.

See also either for a way to return a value or an error.