Cristiano Paris
I was a bit surprised by the strong reaction about my citation of unsafePerformIO. Maybe it'd useful, for the future, to write a document explaining how to help newbies properly, maybe putting it in the mailing list charter.
1) Tell them about interact. 2) If they're not satisfied, or already spoiled by the functions they want to use, explain bind wrt. IO, then do-notation. You don't want them to get puzzled by missing returns, or think that it's a keyword. 3) Let them catch up on monads by themselves, there's no need to confuse people with explanations of things they already understand. In other words: 1) Explain Pointed 2) Explain Functor 3) Explain Applicative 4) Explain Monad -- (c) this sig last receiving data processing entity. Inspect headers for copyright history. All rights reserved. Copying, hiring, renting, performance and/or quoting of this signature prohibited.