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)

Implicit injection

We already saw implicits in a few places in this book. We used them in the type class design pattern and the pimp my library design pattern, and we also mentioned that they can be used for dependency injection. Implicits are also used for conversions from one type to another silently.

They are nothing more than some objects, values, or methods that the compiler knows about and injects for us into methods or places that need them. What we need to make sure is to make these implicits available to the scope of the methods that will use them.

Implicit conversions

We have already mentioned that implicits can be used for silent conversions. Sometimes, it might be useful to be able to assign a Double to an Int...