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  • Book Overview & Buying Scala Design Patterns
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Scala Design Patterns

Scala Design Patterns

By : Ivan Nikolov
4.2 (5)
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Scala Design Patterns

Scala Design Patterns

4.2 (5)
By: Ivan Nikolov

Overview of this book

Scala has become increasingly popular in many different IT sectors. The language is exceptionally feature-rich which helps developers write less code and get faster results. Design patterns make developer’s 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 will learn about the various features of Scala and 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 features of Scala while using practical real-world examples. We will also cover the popular "Gang of Four" design patterns and show you how to incorporate functional patterns effectively. By the end of this book, you will have enough knowledge and understanding to quickly assess problems and come up with elegant solutions.
Table of Contents (14 chapters)
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13
Index

The strategy design pattern


It is quite a common thing in enterprise applications to have different implementations of specific algorithms and choosing one to use while the application is running. Some examples might include different sorting algorithms that would have different performance for different sizes or types of data, different parsers for various possible representations of data, and so on. The strategy design pattern enables us to:

Note

Define a family of algorithms and select a specific one at runtime.

The strategy design pattern helps with encapsulation as each algorithm can be separately defined and then injected into the classes that use it. The different implementations are also interchangeable.

Class diagram

For the class diagram, let's imagine that we are writing an application that needs to load some data from a file and then use this data somehow. Of course, the data could be represented in different formats (CSV or JSON, in this case), and depending on the file type, we...

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