Signals are lost in some cases

I’m not sure if this is a bug, but I found this strange behavior of signals getting lost on some cases.

const pool = kefir.pool();
const prop = pool.toProperty(() => 0);
const later = kefir.later(100, null);

const stream = later
 .flatMapLatest(() => kefir.merge([prop.take(1), pool]))
 .log('stream');

pool.plug(stream.take(1).map(() => 1));

I would expect stream to log with 0 and 1, but only 0 gets logged. Or I’m I misunderstanding this somehow?

To clarify issue a little bit, if I change .flatMapLatest(() => kefir.merge([prop.take(1), pool])) to .flatMapLatest(() => prop) it will log 0 and 1. So it seems pool won’t give signals in this case even though it should according to my understanding.

[mehtonen-boox]

@tweinfeld Thank you! I didn’t know the order matters while merging streams. 🤔 Now when I know this I might be able to avoid issues like this. 👍

[ivan-kleshnin]

Sorry for bad description. What I wanted to say is that sometimes:

x.skip(1).merge(y)

won’t work as you need and y.merge(x.skip(1)) is a different thing. So your only option then may be a switch to statics:

K.merge([
  y,
  x.skip(1),
])

But it also boils down to order dependecy, yes.