There is a very strange, and maybe unexpected, cultural overlap between Perl and Haskell: It's definitely possible to produce write-only Haskell, and once you get good enough writing Haskell it becomes very inviting to do so. It's generally going to be a tiny bit more robust, probably a bit slower, and do dirty things with syb regexen could never dream of. While Perl will rip a DFA through a html file while hoping for the best, Haskell will respect the tree structure and then bend it into eldritch knots, leaving you with a file that's like 50 lines of parser combinators ("it works on my files") and then five lines of completely inscrutable magic doing the actual processing.