Functional Programming Patterns in Scala and Clojure

How This Book Is Organized

We’ll start with an introduction to patterns and how they relate to functional programming. Then we’ll take a look at an extended example, a small web framework called TinyWeb. We’ll first show TinyWeb written using classic object-oriented patterns in Java. We’ll then rewrite it, piece by piece, to a hybrid style that is object oriented and functional, using Scala. We’ll then write in a functional style using Clojure.

The TinyWeb extended example serves a few purposes. It will let us see how several of the patterns we cover in this book fit together in a comprehensive manner. We also use it to introduce the basics of Scala and Clojure. Finally, since we’ll transform TinyWeb from Java to Scala and Clojure bit by bit, ...