BufferTestStreamTransformer<T> class

Creates a Stream where each item is a List containing the items from the source sequence, batched whenever test passes.

Example

Stream.periodic(const Duration(milliseconds: 100), (int i) => i)
  .bufferTest((i) => i % 2 == 0)
  .listen(print); // prints [0], [1, 2] [3, 4] [5, 6] ...
Inheritance

Constructors

BufferTestStreamTransformer(bool test(T value))
Constructs a StreamTransformer which buffers events into a List and emits this List whenever the test Function yields true.

Properties

closeWindowWhen → bool Function(List<T> queue)
Predicate which determines when the current window should close
final, inherited
dispatchOnClose → bool
Toggle to prevent, or allow the final set of events to be dispatched when the source Stream closes
final, inherited
hashCode → int
The hash code for this object. [...]
read-only, inherited
ignoreEmptyWindows → bool
Toggle to prevent, or allow windows that contain no events to be dispatched
final, inherited
onWindowEnd → List<T> Function(List<T> queue)
Handler which fires when the window closes
final, inherited
onWindowStart → List<T> Function(T event)
Handler which fires when the window opens
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
startBufferEvery → int
Used to skip an amount of events
final, inherited
strategy → WindowStrategy
Determines how the window is created
final, inherited
windowStreamFactory → Stream Function(T event)
Factory method used to create the Stream which will be buffered
final, inherited

Methods

bind(Stream<T> stream) → Stream<List<T>>
Transforms the provided stream. [...]
inherited
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 ==(Object other) → bool
The equality operator. [...]
inherited