`fun <A, B> Deferred<Pair<A, B>>...
# coroutinesj
joelpedraza
03/21/2019, 2:09 PMfun <A, B> Deferred<Pair<A, B>>.split(): Pair<Deferred<A>, Deferred<B>>g
gildor
03/21/2019, 2:09 PMDepends on how you want to use it
j
joelpedraza
03/21/2019, 2:10 PMI dont know yet, I’m just getting started with coroutines
g
gildor
03/21/2019, 2:10 PMWhat is your use case?
gildor
03/21/2019, 2:11 PMBecause of course you can invert it like this, but it would be just wrapping result to 2 more deferred
j
joelpedraza
03/21/2019, 2:11 PMProducer returns
ABABA && Bjoelpedraza
03/21/2019, 2:12 PMSo I’d just like to be able to split and await both if the predicate for each is true
g
gildor
03/21/2019, 2:13 PM Copy code
async { val (a, _) = await(); a } to async { val (_, b) = await(); b }gildor
03/21/2019, 2:13 PMsomething like this
s
streetsofboston
03/21/2019, 2:13 PMIf you await either or both, you no longer need to wrap them in a `Deferred`…
j
joelpedraza
03/21/2019, 2:13 PM💡
g
gildor
03/21/2019, 2:13 PMIt’s just not really common to have such operators for Deferred
gildor
03/21/2019, 2:14 PMIt’s recommended to use suspend functions everywhere where it’s possible, so it’s quite interesting case if you really need to work with deferred directly
gildor
03/21/2019, 2:17 PMI agree with Anton, at least this is true in most of cases, but maybe you have more special use case for this
j
joelpedraza
03/21/2019, 2:20 PMI’m not yet sure, I’m really very new to coroutines. But there is the case where the consumer does not need the data from the producer at all. Use case is speculative prefetching
joelpedraza
03/21/2019, 2:21 PMWe’ll probably need one of
ABs
streetsofboston
03/21/2019, 2:26 PMWhat about your own sealed type
Result<out A, out B>Left<out A> : Result<A, Nothing>Right<out B> : Result<Nothing, B>Both<out A, out B> : Result<A,B>None : Result<Nothing, Nothing>streetsofboston
03/21/2019, 2:27 PMThe values for A and/or B are obtained by awaiting for one/both of them
r
raulraja
03/21/2019, 5:25 PMThat is IOR. It can represent an inclusive OR where you may have either value or both
raulraja
03/21/2019, 5:26 PMraulraja
03/21/2019, 5:26 PMYou can use that or rip it off from the sources with only the API you need
raulraja
03/21/2019, 5:27 PMIt's a basic sealed class ADT like Either or what is called here Result
raulraja
03/21/2019, 5:27 PMWith an extra case for Both a b
g
gildor
03/22/2019, 1:22 AMBut there is the case where the consumer does not need the data from the producer at allI would start from another question: what is your use case to have Deferred?
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