Learning Functional Programming in Go

The big reveal

A monad chains continuations.

Recall the monad from the hierarchy diagram of Fantasy Land algebras earlier in this chapter?

We'll talk a lot more about Monads in the last unit of our book, but for now let's take a sneak peak at the big picture.

Earlier we saw composition of functions:

That's actually a problem because that's not a Monoid. A Monoid looks like this:

And that's the big reveal. Monads are purple!

Ha. Gotcha!

Besides the color, what can you see that's different between the monadic function and the ones above it?  ...