Hi friends! is this a good place for any (beginner...

# rx

[Simon Kågedal Reimer]

Hi friends! is this a good place for any (beginner level) RxJava questions, or is it more meant for RxKotlin specific things? Anyway, I have a question. I have a Flowable and I would like to consume all events from it, but add a little delay between each events. How would I best do that?

[Simon Kågedal Reimer]

Oh, this works I guess?

theFlowable.concatMap(s -> Flowable.just(s).delay(1, TimeUnit.SECONDS))

[kioba]

that is the same as saying:

theFlowable.delay(1, TimeUnit.SECONDS)

[Simon Kågedal Reimer]

Hm, no? I tried this:

Flowable.just("One", "two", "three")
    .delay(1, TimeUnit.SECONDS)
    .subscribe(System.out::println);

I’m getting a one second delay, then all three printing at the same time. This, however:

Flowable.just("One", "two", "three")
    .concatMap(f -> Flowable.just(f).delay(1, TimeUnit.SECONDS))
    .subscribe(System.out::println);

..gives me one second pause, “One”, one second pause, “two”, one second pause, “three” – which is what I want.

[alexsullivan114]

yeah I don't think @kioba is correct - there may be some overload of delay that works the way you'd expect it to but in general I think you've got the right approach.

You could also zip your flowable with Flowable.interval to effectively pair up each item in your stream with the item emitted by interval.

Six to half a dozen though really

[Simon Kågedal Reimer]

Allright! Thanks 🙏

[kioba]

sorry, you were right, I was thinking about creating a gap for each element from the initial trigger. concatMap with a delay is a nice solution!