Here in haskell: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/beautiful.pdf https://www.microsoft.com/en-us/research/wp-content/uploads/.

Here in haskell: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/beautiful.pdf https://www.microsoft.com/en-us/research/wp-content/uploads/... Functional programming is not about "no side effects", but how to separate pure functions and side effects. Additionally FP is also about how to separate data and logic.