:) let say that fold left is not as useful as one may think when used in parallel.
Remi On August 15, 2017 4:49:44 PM GMT+02:00, Brian Goetz <brian.go...@oracle.com> wrote: >It's an overstatement to say that forEachOrdered/foldLeft cannot >exploit >parallelism. If I have a stream: > > stream.parallel() > .map(e -> expensiveFn(e)) > .forEachOrdered(e -> ...); > >We still can (and do) perform the mapping in parallel even if we cannot > >perform the folding step yet. See ForEachOps.ForEachOrderedTask. > >On 8/13/2017 3:45 PM, Remi Forax wrote: >> Hi Tagir, >> foldLeft (and foldRight) were intentionally not included in the >Stream API because as you know, their semantics is too strong to be >useful for parallel streams. >> >> regards, >> Rémi >> >> ----- Mail original ----- >>> De: "Tagir Valeev" <amae...@gmail.com> >>> À: "core-libs-dev" <core-libs-dev@openjdk.java.net> >>> Envoyé: Dimanche 13 Août 2017 15:27:36 >>> Objet: RFR: JDK-8133680 add Stream.foldLeft() terminal operation >>> Please review the preliminary implementation for Stream foldLeft and >>> foldRight operations: >>> >>> http://cr.openjdk.java.net/~tvaleev/webrev/8133680/r1/ >>> >>> This implementation has no tests yet. Before writing them I'd like >to >>> be sure that this enhancement could be accepted in general (or >>> probably foldLeft is accepted and foldRight is not?) Could anybody >>> sponsor it when it will be complete? >>> >>> Thank you in advance! >>> >>> Tagir Valeev. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
