I got asked how to do one particular thing in excel, which led to discssion with "our local MSOffice expert".
During the discussion I stated that's it too much of a PITA and that I'd rather write a script.
Long story short, I promised him a one-liner to "show the power and beauty of Haskell".

I got the csv package from hackage, modified the parseCSVFromFile so it's returns IO CSV rather than IO (Either ParseError CSV), and finished with following code

(writeFile "output.csv") =<< (liftM printCSV $ liftM (map updateLine) $ parseCSVFromFile "input.csv")

Is there room for improvement ?
Could it still be made into one-liner without modifying the csv module (and without resorting to
case parseCSVFromFile "input.csv" of { Left _ -> []; Right x -> x}
kind of tricks) ?


Thanks, wman.