[Haskell-cafe] ghci command line execution

[Thedward Blevins]

On Thu, Feb 10, 2011 at 08:44, Thomas Davie <tom.davie at gmail.com> wrote:
>
> A while ago I remember someone showing me some tool, I *think* ghci that allowed you to pass it a function of type String -> String as an input, and have it simply run that function on stdin (presumably using interact) to achieve useful things like this...
>
> $ cat myFile.txt | ghci -e 'unlines . zipWith (\x y -> show x ++ " " ++ y) [1..] . lines'
>
> Does anyone know what it was that I saw being used here?

Maybe you are thinking of this?

http://www.joachim-breitner.de/blog/archives/156-Haskell-on-the-Command-Line.html