A screencast on time-based prefixing in Combine26 Apr 2020
(Assumed audience: folks with some working knowledge of Combine.)
While PR’ing the operator, I looked into whether or not the
prefix(1) safety net is needed and…it isn’t!
Combine uses back pressure to request a single value from
untilOutputFrom and the subsequent finished event cancels everything out from there.
To check this, we can spin up a Playground:
I recorded my first screencast slash lecture slash live-coding episode thing!
In it—and from David’s mentioning in iOS Folks’ #reactive channel—, I implement a time-based overload on
Publisher.prefix, while talking through nuances like fusion,
I hope this encourages folks to experiment with composed operators and, if they see fit, contribute to CombineExt.
⇒ Entwine’s implementation of a