Airstream/com.raquo.airstream.split/SplittableOptionStream

SplittableOptionStream

final class SplittableOptionStream[Input](val stream: EventStream[Option[Input]]) extends AnyVal
class AnyVal
trait Matchable
class Any

Value members

Concrete methods

def splitOption[Output](project: (Input, Signal[Input]) => Output, ifEmpty: => Output): Signal[Output]

This .split-s a Stream of an Option by the Option's isDefined property. If you want a different key, use the .split operator directly.

This .split-s a Stream of an Option by the Option's isDefined property. If you want a different key, use the .split operator directly.

Value parameters:
ifEmpty
  • returned if Option is empty, or if the parent stream has not emitted any events yet. Re-evaluated whenever the parent stream switches from Some(a) to None. ifEmpty is NOT re-evaluated when the parent stream emits None if the last event it emitted was also a None.
project
  • (initialInput, signalOfInput) => output project is called whenever signal switches from None to Some(). signalOfInput starts with initialInput value, and updates when the parent signal updates from Some(a) to Some(b).

Concrete fields

val stream: EventStream[Option[Input]]