So true!

It really just took one minute haha. I didn't have the skills to takle the problem in a different way.
After seeing other solutions I would probably go with something involvig Data.Map. That's the beauty of this, learning by comparison.

You're absolutely right, it's very descriptive and self-explanatory. But a lot of work to code up, wasn't it? Sorry, I'm just curious because usually I would spend hours to come up with a supposedly "easy" solution to a coding problem that reduces typing instead of going the route of hardcoding stuff (which might take just 20 min or so).

It may not be clever at all but no doubt the code is very comprehensive. f is just the funtion that maps a caracter to it's rot13 version.

Oh well, I didn't expect that. It's certainly a solution, maybe not an optimal one, though... Any comments why this should be a solution to this problem?