[Haskell-cafe] How to incrementally update list
bmaxa at hotmail.com
Wed Nov 28 12:43:46 CET 2012
Problem is following short program:list = [1,2,3,4,5]
advance l = map (\x -> x+1) l
run 0 s = srun n s = run (n-1) $ advance s
main = do let s = run 50000000 list putStrLn $ show s
I want to incrementally update list lot of times, but don't knowhow to do this.Since Haskell does not have loops I have to use recursion,but problem is that recursive calls keep previous/state parameterleading to excessive stack.and memory usage.I don't know how to tell Haskell not to keep previousstate rather to release so memory consumption becomesmanagable.
Is there some solution to this problem as I think it is rathercommon?
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