Why are they doing this exactly? Did some exec hear about the functional language and decided "yep thats it, we're rewriting entire thing"? Or do you actually have many people already experienced?
Haskell is an awesome language, but if the decision is taken lightly it will explode in your faces. Especially that it's not very easy language compared to others, even to other functional like Lisp. Either way, just start with
http://learnyouahaskell.com/This post was edited by nuvo on Jul 20 2017 01:47am