Created
May 9, 2014 01:07
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Simple algorithm to draw 6 numbers in the range [1..49], implemented in Haskell, as an exercise with Data.Set.
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| import qualified Data.Set as Set | |
| import System.Random (randomRIO) | |
| import Control.Monad (return) | |
| type Numbers = Set.Set Int | |
| draw :: Int -> Numbers -> IO Numbers | |
| draw i s = | |
| if ((Set.size s) == i) then return s | |
| else do | |
| n <- randomRIO (1, 49) | |
| draw i $ Set.insert n s |
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