Haskell Interlude 36 - John Hughes
In this episode, Matti and Wouter are joined by John Hughes. John is one of the authors of the original Haskell Report and talks about why functional programming matters, the origins of QuickCheck testing, and how higher order functions and lazy evaluation is the key that makes functional programming so productive, and so much... #haskell https://kbin.social/m/haskell/t/585043
Great point about Haskell seemingly becoming less and less easy to learn for beginners around 15:00. I hope some day we get a language levels system where you can start with a very simple subset and slowly expand to the full language.
@jaror Haskell 2010 is pretty simple. What do you imagine is the simpler starting point, if any? If Haskell 2010 is a good starting point, aren't language pragmas / extensions effectively the same as your "language levels"?
Type classes are a big cause of confusion among newcomers. Polymorphism too.
If you want to see how simple a language can really get you should check out Hedy: https://www.hedycode.com/. It even removes string quotes (let alone variables) at the simplest level. Although it is too imperative for my taste.
@jaror @BoydStephenSmithJr Type classes have been in Haskell since forever. There’s no Haskell “level” that would avoid them while being a level of Haskell instead of some vague/generic “functional programming”.
If you want to teach Haskell - you teach Haskell, with its staples like type classes and laziness.
I'm not suggesting you should never explain type classes. I simply want to avoid having to explain type classes before I can explain how to add two integers. And more importantly, I don't want error messages to mention type classes until they have been understood.
@jaror @BoydStephenSmithJr Understandable… I’ve thought default rules made that possible.
Anyway, I didn’t encounter much problems with type classes while teaching Haskell, not even as a first language. May all of my students were okay with some suspense 😅
