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  1. sort :: Ord a => [a] -> [a]
  2.  
  3. sort []         =  []
  4. sort [x]        =  [x]
  5. sort xs         =  merge (sort ys) (sort zs)
  6.   where 
  7.       (ys,zs) =  splitAt (length xs `div` 2) xs
  8.        merge [] y=y
  9.        merge x []=x
  10.        merge (x:xs) (y:ys)
  11.          | x <= y = x:merge xs (y:ys)
  12.          | otherwise = y:merge (x:xs) ys
  13.  
  14. sort ([15,20,31,39, 40, 43, 50])
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
[1 of 1] Compiling Main             ( prog.hs, prog.o )

prog.hs:8:17: parse error on input `='
stdout
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Standard output is empty
https://ideone.com/eyR30
language:
Haskell (ghc 8.4.4)
created:
14 years ago
visibility:
public

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