[Haskell-cafe] The next 7000... abstractions to learn!

[Gautier DI FOLCO]

Hi all,

I'm using Haskell since nearly three years now and I think I have well
understood that types are the most important part of our programs.
I have looked all around to learn as many datatypes/typeclasses as possible.
But I suffer for a lack of direction to pursue my learning. I have well
understood Prelude's one and some random ones (include someones for
Category Theory), but I can't handle Kmett's code. Are there some
intermediates abstractions I can learn? (For example in some librairies).

Thanks by advance for your help.
Regards.
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