Comments (3)
Imagine you've got a timer and want to cancel it when listeners stop:
function interval(ms: number) {
const s = stream()
let i = 0;
const interval = setInterval(()=> s(i++), ms)
s.end.map(()=> clearInterval(interval))
return s
}
interval(1000)
.pipe(take(4))
// 1-2-3-4
This can be extrapolated for arbitrary cleanup logic for e.g. web sockets
from flyd.
I assume take
in the case must be aware of the additional protocol and has to actively close upstream interval when it's done. take
probably also has to close itself so that an appropriate side-effect can be triggered. I this correct?
from flyd.
That sounds about right. Some of the built-in modules propagate ending downwards using a pattern like
const takeUntil = (term, src) =>
flyd.endsOn(
flyd.merge(term, src.end),
flyd.combine((src, self) => {
self(src());
}, [src])
);
from flyd.
Related Issues (20)
- add more dependency for existing combine HOT 7
- Merge stream delay HOT 6
- add package.module
- Drag 'n Drop example is broken HOT 2
- Compare previous state with current state HOT 14
- Feature Request - Supply metadata for a combined stream HOT 2
- Help to build control flow func HOT 3
- Do you think this Promise -> Stream conversion is a right alternative way? HOT 6
- Wrong chain + setImmediate behavior HOT 1
- Benchmark against Most.js HOT 3
- Can flyd streams be made lazy ? HOT 9
- HELP: Trouble reading api documentation HOT 1
- Enhancement: Add Readonly-Streams (at least in Typings) HOT 3
- question on serialize stream
- from Node stream HOT 2
- Question: Required (code) complexity for higher-order streams HOT 10
- Support multiple operators for Pipe HOT 4
- [Help Needed] CombineLatest in the style of RxJs HOT 17
- Switch Latest without Ramda Dependency HOT 6
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from flyd.