This is a collection of the resources I've found most useful when exploring the world of functional programming.

• Professor Frisbys Mostly Adequate Guide To Functional Programming (JS)
• Learn you a haskell LYAHFGG
• Programming in haskell (not free)
• Structure and Interpretation of Computer Programs

• Fantasyland Spec: Algebraic Structures in JS Most data types with their laws

• Simple Visual guide to Functors, Applicatives and Monads
• Functor Laws and functions (JS)
• Contravariant Functors, Profunctors (video)

• Don’t fear the monad (video) Good introduction to monads and monoids
• Functor → Applicative → Monad Monad Ladder from LYAHFGG
• Free Monads (video)

• Thinking in Rambda Lenses
• Lenses with Immutable.js

• Category Theory by Wadler (video) products, sums/coproducts, exponentials ⭐
• Bartosz Milewski Lecture Series (video):
  • Course 1
  • Course 2
  • Course 3

• Thirteen Ways of Looking at a Turtle

• How to Declare an Imperative, Wadler
• Curse of the Excluded Middle, Meijer
• Functional Reactive Animation, Elliot & Hudak