> I want to incrementally update list lot of times, but don't know how to do this.

Are you using the right data structure for the job? Maybe you want an array instead?

-- Kim-Ee


On Wed, Nov 28, 2012 at 6:43 PM, Branimir Maksimovic <bmaxa@hotmail.com> wrote:
Problem is following short program:
list = [1,2,3,4,5]

advance l = map (\x -> x+1) l

run 0 s = s
run 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 know
how to do this.
Since Haskell does not have loops I have to use recursion,
but problem is that recursive calls keep previous/state parameter
leading to excessive stack.and memory usage.
I don't know how to tell Haskell not to keep previous
state rather to release so memory consumption becomes
managable.

Is there some solution to this problem as I think it is rather
common?


_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe