single property

E single
override

Checks that this iterable has only one element, and returns that element.

Throws a StateError if this is empty or has more than one element.

Implementation

E get single {
  if (_count == 0) throw IterableElementError.noElement();
  if (_count > 1) throw IterableElementError.tooMany();
  return _root!.key;
}

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-collection/SplayTreeSet/single.html