module Dice where import System.Random import System.IO.Unsafe (unsafePerformIO,unsafeInterleaveIO) import Data.List (unfoldr)
dice4,dice6,dice8,dice10,dice12,dice20,dice666 :: [Int] dice4 = randomRs (1,4) (read "foo"::StdGen) dice6 = randomRs (1,6) (mkStdGen 5) dice8 = randomRs (1,8) (unsafePerformIO newStdGen) dice10 = unfoldr (Just . randomR (1,10)) (read "42"::StdGen) dice12 = fmap ((+1).(mod `flip` 12)) $ randoms (read "bar"::StdGen) dice20 = [succ $ x `mod` 20|x<-unfoldr (Just . random) (mkStdGen 23)] dice666 = unfoldr (\io_a -> Just . unsafePerformIO $ fmap ((,)`flip` io_a) io_a) $ randomRIO (1,666) Am Donnerstag, 26. April 2007 18:58 schrieb robert bauer: > Hi, > > I need some random numbers. The documentation identifies StdGen, but I can't > figure out how to invoke it. The documentation is great > in every way, except an actual example that I can essentially cut and paste. > > Thanks > > _______________________________________________ > Haskell mailing list > Haskell@haskell.org > http://www.haskell.org/mailman/listinfo/haskell >
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