I recently blogged about Functors and mentioned a mysterious beast called Applicative Functor. Here is a simple, complete example that shows how you can use Applicative Functors with the Scalaz library, with references for further reading.
[...]

In the world of functional programming you will quickly come across the concept of a Functor. What I present below is a simple example that might provide some intuition, with references for further reading.
[...]

I wanted a very tiny example of using the IO Monad in the brilliant Scalaz library, and here it is.

[...]