What happens if you combine 2 Flows and one of the...

# coroutines

[Florian]

What happens if you combine 2 Flows and one of them throws an exception? Will it be caught in a catch operator I add on the resulting (combined) Flow?

[louiscad]

Yes, you can also just try it on play.kotl.in or in a dummy/playground project

[louiscad]

val flow1 = flow<Whatever> { null! }
val flow2 = flow<Whatever> { emit(whatever()) }
val flowToTest = combine(flow1, flow2) { a, b -> stuff(flow1, flow2) }
TODO("test catch operator")

[Florian]

thank you

[Florian]

that play site is useful, I'll use that in the future

[louiscad]

It's quite similar to a brand new project though

[Florian]

well I'm using Android Studio

[louiscad]

You can have IntelliJ next to it, doesn't hurt 🙂

[louiscad]

Also, once you created the project I'm pretty sure you can open it in Android Studio if needed.

[Florian]

makes sense, thank you

[bezrukov]

you can just write

fun main() {
}

in any file in Android Studio at the top (below imports, if there are any), to test anything (Run button will appear in the left side bar to fun main)

[louiscad]

It will take longer to compile than a blank project though

[bezrukov]

yes, but you will have an access to the project codebase. Plus, if a project modularized enough compile will be quite fast (faster than opening idea 🙂) in leaf module

[louiscad]

Well, I have IDEA open already 😄

[Florian]

@bezrukov that's very cool, thank you