Functional Programming in Plain Terms
summary
Walks through concrete examples: Haskell type signatures like head :: [a] -> Maybe a, shows how fmap maps to Ruby map, and demonstrates accumulation with reduce/monoids and a string‑concatenation example that returns "hello world". Explains monads as "smart pipes" and shows the dry-monad gem pattern (writer, state, IO) to keep functions pure while logging or threading state. Recommends Learn You a Haskell and Elm for hands‑on practice.
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