Editing One-liner program (section)

===Haskell===
The following [[Haskell (programming language)|Haskell]] program is a one-liner: it sorts its input lines [[ASCII#Order|ASCIIbetically]].
<syntaxhighlight lang="haskell">
main = (mapM_ putStrLn . Data.List.sort . lines) =<< getContents -- In ghci a qualified name like Data.List.sort will work, although as a standalone executable you'd need to import Data.List.
</syntaxhighlight>

An even shorter version:
<syntaxhighlight lang="haskell">
main = interact (unlines . Data.List.sort . lines) -- Ditto.
</syntaxhighlight>

Usable on the command line like:
<syntaxhighlight lang="bash">
cat filename | ghc -e "interact (unlines . Data.List.sort . lines)"
</syntaxhighlight>