FlatMapStreamTransformer<T, S> class

Converts each emitted item into a new Stream using the given mapper function. The newly created Stream will be listened to and begin emitting items downstream.

The items emitted by each of the new Streams are emitted downstream in the same order they arrive. In other words, the sequences are merged together.

Example

  new Stream.fromIterable([4, 3, 2, 1])
    .transform(new FlatMapStreamTransformer((i) =>
      new Stream.fromFuture(
        new Future.delayed(new Duration(minutes: i), () => i))
    .listen(print); // prints 1, 2, 3, 4

Constructors

FlatMapStreamTransformer(Stream<S> mapper(T value))
Constructs a StreamTransformer which emits events from the source Stream using the given mapper. The mapped Stream will be listened to and begin emitting items downstream.

Properties

hashCode → int
The hash code for this object.
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

bind(Stream<T> stream) → Stream<S>
Transforms the provided stream. [...]
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
Returns a string representation of this object.
inherited

Operators

operator ==(dynamic other) → bool
The equality operator.
inherited