RosettaCodeData/Task/First-class-environments/Haskell/first-class-environments-6.hs

14 lines
369 B
Haskell

fixedPoint f x
| fx == x = [x]
| otherwise = x : fixedPoint f fx
where fx = f x
prettyPrint field = putStrLn . foldMap (format.field)
where format n = (if n < 10 then " " else "") ++ show n ++ " "
main = do
let result = fixedPoint (map process) environments
mapM_ (prettyPrint value) result
putStrLn (replicate 36 '-')
prettyPrint count (last result)