ExhaustMapStreamTransformer<S, T> class Null safety

Converts events from the source stream into a new Stream using a given mapper. It ignores all items from the source stream until the new stream completes.

Useful when you have a noisy source Stream and only want to respond once the previous async operation is finished.

Example

// Emits 0, 1, 2
Stream.periodic(Duration(milliseconds: 200), (i) => i).take(3)
  .transform(ExhaustMapStreamTransformer(
    // Emits the value it's given after 200ms
    (i) => Rx.timer(i, Duration(milliseconds: 200)),
  ))
.listen(print); // prints 0, 2

Inheritance

• Object
• StreamTransformerBase<S, T>
• ExhaustMapStreamTransformer

Constructors

ExhaustMapStreamTransformer(Stream<T> mapper(S value))

Constructs a StreamTransformer which maps each event from the source Stream using mapper.

Properties

hashCode → int

The hash code for this object.

read-only, inherited

mapper → Stream<T> Function(S value)

Method which converts incoming events into a new Stream

final

runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

Methods

bind(Stream<S> stream) → Stream<T>

Transforms the provided stream.

override

cast<RS, RT>() → StreamTransformer<RS, RT>

Provides a StreamTransformer<RS, RT> view of this stream transformer.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a non-existent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited