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Why Type Classes

How do you learn a programming language?

  • Books start from basics and build up, and along the way can introduce you to things you might not have known you needed.
  • Good documentation gives a concise summary of how to use something, if you already have the context and know what you’re looking for.

Why not have both? In one place, with consistent style and quality. That’s Type Classes.

Type Classes membership offers a combination of book-like courses and documentation for Haskell features, linked together into a single resource.

Our top-quality courses and documentation include some things that no other Haskell resource does:

Look around
What's new
New in Functortown: An applicative Map
In this lesson we look at why an important data structure called Map is not a valid instance of …
The Interactive Compiler
This series gives a comprehensive introduction to basic GHCi commands and usage.
The Compose newtype
In this addition to the Applicative section of the Functortown series, we continue our discussion of applicative functor …
Thanks for Type Classes and all you provide to the Haskell community. It’s helped me go from a longtime Haskell “lurker” to someone now using Haskell professionally. – Matt Revelle
a masterclass in documentation … – Craig Dallimore
Really informative courses @typeclasses! Highly recommended to anyone who is interested in FP. The more I read the more I realise I don’t know anything about most things anymore. – @mmgalea
I’m really enjoying @typeclasses. The validation course is a real tour de force that makes Monads easy to understand and really provides the context and justification. – @wennefer
Typeclasses is very good. I didn’t expect I’d learn so much since I already knew Haskell well but there’s lots of interesting nuggets of wisdom around. – Jasper Van der Jeugt