Dear list, I'm trying to change my code from using Data.Array to Data.Vector. I have some question regarding the monadic use of 'Vector'. Searching through the list couldn't give me enough hints, so I guess I'd try my luck asking on the list. I want to use 'mapM' on Data.Vector.Vector, but it looks like the only 'mapM' defined is in Data.Vector.Fusion.Stream.Monadic. I'm able to use 'stream' and 'liftStream' to convert a 'Vector' to a monadic stream, on which I can use 'mapM'. But I couldn't find a way to convert the monadic stream back to Vector without using an intermediate list. I don't think I understand the internal of monadic stream that much. But it looks not so fusion to me. Is it the only way back to Vector? Thanks, jxy -- J c/* __o/* X <\ * (__ Y */\ <