[dboreham]

>"a monad is just a monoid in the category of endofunctors"

Once I discovered the Monad thing in Haskell has pretty much nothing to do with the Monad in Category Theory, everything made much more sense. As a bonus I now (sort of) understand Category Theory. Much the same as Relational Databases have not very much to do with Relational Algebra.

[tome]

This is a very important point although I would slightly tweak this

> the Monad thing in Haskell has pretty much nothing to do with the Monad in Category Theory

to "the Monad thing in Haskell is a very simple special case of the Monad in Category Theory". Thinking you have to "learn category theory" before you can use a Monad in Haskell is like thinking you have to learn this

https://en.wikipedia.org/wiki/Function_space#Functional_anal...

before using a function.

[pleasecalllater]

Indeed. And this is a great comment.