[Haskell-cafe] How to deal with last item with concatMapAccumC in Conduit.
zhangjun.julian at gmail.com
Mon Jul 17 02:48:05 UTC 2017
I use Conduit to parse a huge file. And I need merge lines by condition.
I find the concatMapAccumC can do that and I write a demo as blow(with conduit-combinators-1.0.6,lts-6.18).
The problem is if the last item didn’t make condition true, the data only keep in the accum but missing in stream.
Any one can give me some advises?
test' a s = case (a+s) > 5 of
True -> (0,[a+s])
False -> (a+s,)
testlog = runConduit $ (yieldMany [1,2,3,4,5,6,3]) $= (concatMapAccumC test' 0 ) $$ sinkList
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