[Haskell-cafe] Vector to Monadic Stream and back, how?
xj2106 at columbia.edu
Tue Apr 13 19:05:56 EDT 2010
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?
J c/* __o/*
X <\ * (__
Y */\ <
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