ScanStreamTransformer<T, S> class

Applies an accumulator function over an observable sequence and returns each intermediate result. The optional seed value is used as the initial accumulator value.

Example

new Stream.fromIterable([1, 2, 3])
   .transform(new ScanStreamTransformer((acc, curr, i) => acc + curr, 0))
   .listen(print); // prints 1, 3, 6
Inheritance

Constructors

ScanStreamTransformer(S accumulator(S accumulated, T value, int index), [S seed])
Constructs a ScanStreamTransformer which applies an accumulator Function over the source Stream and returns each intermediate result. The optional seed value is used as the initial accumulator value.

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. [...]
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
Returns a string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited