T, S> class
Converts each emitted item into a new Stream using the given mapper function. The newly created Stream will be be listened to and begin emitting items, and any previously created Stream will stop emitting.
The switchMap operator is similar to the flatMap and concatMap methods, but it only emits items from the most recently created Stream.
This can be useful when you only want the very latest state from asynchronous APIs, for example.
new Stream.fromIterable([4, 3, 2, 1]) .transform(new SwitchMapStreamTransformer((i) => new Stream.fromFuture( new Future.delayed(new Duration(minutes: i), () => i)) .listen(print); // prints 1
Stream< T>stream) → Stream< S>
Transforms the provided
RS, RT>( ) → StreamTransformer< RS, RT>
StreamTransformer<RS, RT>view of this stream transformer. [...]inherited
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → String
A string representation of this object. [...]