I want to select between 2 `Deferred<V>` but...

# coroutines

[Kroppeb]

I want to select between 2 Deferred<V> but only fail if both fail. Would this work/is there a better way to do it?

[Dico]

What do you mean by fail? Cancellation or thrown error?

[Dico]

For the latter, you should make sure to start them in a supervisorScope {}

[Kroppeb]

They are completabledeferred, when I asked the question I meant completedexceptionally

[octylFractal]

personally I would do:

select<Int> {
                t.onJoin {
                    try {
                        t.await()
                    } catch (e: Exception) {
                        o.await()
                    }
                }
                o.onJoin {
                    try {
                        o.await()
                    } catch (e: Exception) {
                        t.await()
                    }
                }
            }

with the try-catch probably pulled out to a function

[Dico]

I'd make sure to add some logic for suppressed exceptions as well.

[octylFractal]

yes, probably another try-catch around the second await. more reasons to make it its own function 🙂

[Dico]

Or just some logic with if (isCompletedExceptionally)