Book Image

Scala Design Patterns - Second Edition

By : Ivan Nikolov
Book Image

Scala Design Patterns - Second Edition

By: Ivan Nikolov

Overview of this book

Design patterns make developers’ lives easier by helping them write great software that is easy to maintain, runs efficiently, and is valuable to the company or people concerned. You’ll learn about the various features of Scala and will be able to apply well-known, industry-proven design patterns in your work. The book starts off by focusing on some of the most interesting and latest features of Scala while using practical real-world examples. We will be learning about IDE’s and Aspect Oriented Programming. We will be looking into different components in Scala. We will also cover the popular "Gang of Four" design patterns and show you how to incorporate functional patterns effectively. The book ends with a practical example that demonstrates how the presented material can be combined in real-life applications. You’ll learn the necessary concepts to build enterprise-grade applications. By the end of this book, you’ll have enough knowledge and understanding to quickly assess problems and come up with elegant solutions.
Table of Contents (14 chapters)

The builder design pattern

The builder design pattern helps to create instances of classes using class methods rather than the class constructors. It is particularly useful in cases where a class might need multiple versions of its constructor in order to allow different usage scenarios.

Moreover, in some cases, it might not even be possible to define all combinations or they might not be known. The builder design pattern uses an extra object, called builder, in order to receive and store initialization parameters before building the final version of an object.

An example class diagram

In this subsection, we will provide a class diagram for the builder pattern the way it was classically defined and the way it looks in other...