A monoid is a set that is closed under an associative binary operation and has an identity element I ∈ Such that for all a ∈ S, Ia = aI = a. Note that unlike a group, its elements need not have inverses.
Who first said the following? A monad is just a monoid in the category of endofunctors, what's the problem? And …
haskell monads category-theory monoidsI have recently tried to find a good source on the difference between monads and monoids. Could someone provide a …
scala functional-programming monads monoids