The Monad called Free
Summary
The Monad Called Free explains how the Free construction can be viewed as a higher-order monad within Endo, introduces HFunctor and hfmap, and shows how Free monads relate to lists and monoids in the category of endofunctors. The post includes Haskell code snippets and references, offering a deep, theoretical perspective suitable for FP enthusiasts, though it's somewhat niche for mainstream IT and automation topics.