Functional Reactive Programming

Chapter 11. Programming in the real world

This chapter covers

• Dealing with I/O
• Working with promises and futures
• Distributed processing
• Unit testing

Functional programming in general gives you an idealized programming model, allowing you to focus on the problem itself, and FRP does this too. In chapter 9, you bounced a ball in an ideal world of continuous time, as if in some Zen squash court from the movie The Matrix. Earlier, chapter 8 covered some of the uncharted, more operational areas of the FRP design space. But sooner or later, you’ll have to deal with something even more terrifying: the real world.

I/O is notorious for presenting intractable difficulties and complexities. I/O and logic tend to mutually complicate each other, ...