Raku also has map and grep methods for collections, so it could be written as... my @sink = @source.map({...}).grep({...}).sort; Which also makes multithrea

Raku also has map and grep methods for collections, so it could be written as... my @sink = @source.map({...}).grep({...}).sort; Which also makes multithreading the operation easy: my @sink = @source.hyper.map({...}).grep({...}).sort.list; That said, I think the operator you're looking for is the feed operator, ==>: my @sink; @source ==> map {...} ==> grep {...} ==> sort ==> @sink; It also has the corresponding reverse, <==, because why not. The docs* mention that ==> may at some point do automatic parallelization, but I don't know what the status of that feature is. * https://docs.raku.org/routine/==%3E https://docs.raku.org/routine/==%3E