https://learn-functional-programming.com/chapters/1.0-introduction/ https://learn-functional-programming.com/chapters/2.0-programming-paradigms/ https://learn-functional-programming.com/chapters/2.1-imperative-programming/ https://learn-functional-programming.com/chapters/2.2-declarative-programming/ https://learn-functional-programming.com/chapters/2.3-functional-programming/ https://learn-functional-programming.com/chapters/3.0-theory/ https://learn-functional-programming.com/chapters/3.1-pure-functions/ https://learn-functional-programming.com/chapters/3.2-well-behaved-imperative-procedures/ https://learn-functional-programming.com/chapters/3.3-inherent-impurities/ https://learn-functional-programming.com/chapters/3.4-intentional-impurities/ https://learn-functional-programming.com/chapters/4.0-practice/ https://learn-functional-programming.com/chapters/4.1-recursion/ https://learn-functional-programming.com/chapters/4.2-immutable-data-structures/ https://learn-functional-programming.com/chapters/4.3-higher-order-functions/ https://learn-functional-programming.com/chapters/4.4-lazy-evaluation/ https://learn-functional-programming.com/chapters/4.5-memoization/ https://learn-functional-programming.com/chapters/4.6-partial-application-and-currying/ https://learn-functional-programming.com/chapters/4.7-sequence-transformations/ https://learn-functional-programming.com/chapters/5.0-what-about-side-effects/ https://learn-functional-programming.com/chapters/5.1-separation-of-concerns/ https://learn-functional-programming.com/chapters/5.2-encapsulation/ https://learn-functional-programming.com/chapters/5.3-idempotence/ https://learn-functional-programming.com/chapters/5.4-semantically-insignificant-side-effects/ https://learn-functional-programming.com/chapters/ https://learn-functional-programming.com/