Hi,
you can do that using scan with something like this (not compiled):
flow.scan(zero = (0, 0)) {
case ((prevScan, prevElem), elem) => (prevScan, elem)
}
On Thu, Jan 28, 2016 at 6:05 PM, Richard Rodseth <rrods...@gmail.com> wrote:
> In akka-streams, scan is like fold, in that it takes a zero and a function
> to do the accumulating, but it emits each accumulated value rather than the
> final result.
>
> But what if I wanted to emit tuples of the accumulated value and the
> stream element?
>
> Is there an operator I've missed or would scanMap (?) be a useful addition?
>
>
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--
Martynas Mickevičius
Typesafe <http://typesafe.com/> – Reactive
<http://www.reactivemanifesto.org/> Apps on the JVM
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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