Is there anyway I could get ``` CompletableFuture lt List lt kotlinlang #getting-started

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Title

p

poohbar

08/03/2018, 6:25 PM

Is there anyway I could get:

CompletableFuture<List<Person>>

from

List<CompletableFuture<Person>>

I can't wrap my head around it 😕

:stackoverflow: 1

r

Ruckus

08/03/2018, 6:37 PM

According to 😒tackoverflow: (https://stackoverflow.com/questions/30025428/listfuture-to-futurelist-sequence), you can use a function like this:

fun <T> List<CompletableFuture<T>>.unwrap(): CompletableFuture<List<T>> =
    CompletableFuture.allOf(*toTypedArray()).thenApply { map { it.join() } }

Basically, it creates a wrapper

CompletableFuture

that waits for all the others to finish, then unwraps each value into a list.

p

poohbar

08/03/2018, 6:53 PM

interesting.. thank you, hopefully the dispatcher will be happy with this

👍 1

d

diesieben07

08/03/2018, 7:22 PM

holds up "Monads" flag

k

karelpeeters

08/03/2018, 7:23 PM

Cries while attempting to learn monads

c

Can Orhan

08/06/2018, 7:08 AM

Cries over the memory of skipping over the monads question in my university exam

3 Views

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