In today's world, user interfaces have to be highly dynamic, asynchronous, and reliable. To meet these demands, the programming world is undergoing a radical shift towards something called Functional Reactive Programming (FRP), or just Reactive Programming. FRP offers programmers a new way to construct their applications so that they respond directly to change. And developers spend less time tracing obscure problems and more time focusing on what their code should be doing.

Grokking FRP teaches programmers a new way of thinking about programs and data as well as how to build...