[Haskell-cafe] Random this! ;-)
tob.brandt at googlemail.com
Sun Jul 25 11:48:15 EDT 2010
Look for the function replicateM in the module Control.Monad.
On 25 July 2010 17:39, michael rice <nowgate at yahoo.com> wrote:
> Hi All,
> From: http://en.wikibooks.org/wiki/Haskell/Understanding_monads/State
> 1. Implement a function rollNDiceIO :: Int -> IO [Int] that,
> given an integer, returns a list with that number of pseudo-
> random integers between 1 and 6.
> After a lot of learning what not to do, this is the best I could come up
> rollNDiceIO :: Int -> IO [Int]
> rollNDiceIO n = mapM (\x -> randomRIO(1,6)) (replicate n 1)
> I know, ugly, but at least I got it to work. What's a better way to
> generate this list?
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> Haskell-Cafe at haskell.org
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