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  1. import System.Random   (randomRIO)
  2.  
  3. shuffle :: [a] -> IO [a]
  4. shuffle [] = return []
  5. shuffle xs = do rnd <- randomRIO (0,length xs - 1)
  6.                 let (ys,z:zs) = splitAt rnd xs
  7.                 shuffle zs >>= return . (z:)
  8.  
  9. main :: IO ()
  10. main = shuffle [1..10] >>= print
Success #stdin #stdout 0s 4984KB
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Standard input is empty
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[10]
https://ideone.com/KSFc4N
language:
Haskell (ghc 8.4.4)
created:
10 years ago
visibility:
public

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