DefaultIfEmptyStreamTransformer<T> class

Emit items from the source Stream, or a single default item if the source Stream emits nothing.

Example

new Stream.empty()
  .transform(new DefaultIfEmptyStreamTransformer(10))
  .listen(print); // prints 10

Constructors

DefaultIfEmptyStreamTransformer(T defaultValue)

Properties

transformer → StreamTransformer<T, T>
final
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<T>
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