contains method

  1. @override
Future<bool> contains(
  1. Object? needle
)
inherited

Returns whether needle occurs in the elements provided by this stream.

Compares each element of this stream to needle using Object.==. If an equal element is found, the returned future is completed with true. If this stream ends without finding a match, the future is completed with false.

If this stream emits an error, or the call to Object.== throws, the returned future is completed with that error, and processing stops.

Example:

final result = await Stream.fromIterable(['Year', 2021, 12, 24, 'Dart'])
    .contains('Dart');
print(result); // true

Implementation

@override
Future<bool> contains(Object? needle) => stream.contains(needle);