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  1. import Data.List
  2. import Control.Arrow
  3. main :: IO ()
  4. main = print $ f "We will encourage you to develop the three great virtues of a programmer: laziness, impatience, and hubris."
  5. f :: String -> [String]
  6. f = map (uncurry (++) . (((++ "=>") . show) *** show) . (head &&& length)) . group . sort
  7.  
Success #stdin #stdout 0s 6232KB
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Standard input is empty
stdout
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["' '=>16","','=>2","'.'=>1","':'=>1","'W'=>1","'a'=>7","'b'=>1","'c'=>2","'d'=>2","'e'=>14","'f'=>1","'g'=>3","'h'=>3","'i'=>6","'l'=>4","'m'=>3","'n'=>4","'o'=>6","'p'=>3","'r'=>8","'s'=>4","'t'=>6","'u'=>4","'v'=>2","'w'=>1","'y'=>1","'z'=>1"]
https://ideone.com/3c7HRx
language:
Haskell (ghc 8.4.4)
created:
10 years ago
visibility:
public

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