Name: async
Owner: Dart
Description: A Dart package that contains tools to work with asynchronous computations.
Created: 2015-02-24 09:58:26.0
Updated: 2018-05-19 22:40:57.0
Pushed: 2018-05-24 09:43:23.0
Homepage: https://pub.dartlang.org/packages/async
Size: 248
Language: Dart
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Contains utility classes in the style of dart:async to work with asynchronous
computations.
The AsyncCache class allows expensive asynchronous
computations values to be cached for a period of time.
The AsyncMemoizer class makes it easy to only run an
asynchronous operation once on demand.
The CancelableOperation class defines an operation
that can be canceled by its consumer. The producer can then listen for this
cancellation and stop producing the future when it's received. It can be
created using a CancelableCompleter.
The delegating wrapper classes allow users to easily add functionality on top
of existing instances of core types from dart:async. These include
DelegatingFuture,
DelegatingStream,
DelegatingStreamSubscription,
DelegatingStreamConsumer,
DelegatingSink,
DelegatingEventSink, and
DelegatingStreamSink.
The delegating classes all have .typed() constructors which allow users to
cast the generic type parameters in a way that's safe for strong mode. For
example, if future is a Future<dynamic> and you know it actually contains an
int, you can write DelegatingFuture.typed<int>(future).
The FutureGroup class makes it easy to wait until a group of
features that may change over time completes.
The LazyStream class allows a stream to be initialized lazily
when .listen() is first called.
The NullStreamSink class is an implementation of
StreamSink that discards all events.
The RestartableTimer class extends Timer with a
reset() method.
The Result class that can hold either a value or an error. It
provides various utilities for converting to and from Futures and Streams.
The StreamGroup class merges a collection of streams into a
single output stream.
The StreamQueue class allows a stream to be consumed
event-by-event rather than being pushed whichever events as soon as they
arrive.
The StreamSplitter class allows a stream to be duplicated
into multiple identical streams.
The StreamZip class combines multiple streams into a single
stream of lists of events.
This package contains a number of StreamTransformers.
SingleSubscriptionTransformer converts a
broadcast stream to a single-subscription stream, and
typedStreamTransformer casts the type of a
Stream. It also defines a transformer type for StreamSinks,
StreamSinkTransformer.
The SubscriptionStream class wraps a
StreamSubscription so it can be re-used as a Stream.