Look for the function replicateM in the module Control.Monad.
On 25 July 2010 17:39, michael rice
Hi All,
From: http://en.wikibooks.org/wiki/Haskell/Understanding_monads/State
Exercises
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 with.
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?
Michael
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