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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

Traits


Many of you might have different perspectives of traits in Scala. They can be viewed not only as interfaces in other languages, but also as classes with only parameter-less constructors.

Tip

Trait parameters

The Scala programming language is quite dynamic and it has evolved quickly. One of the directions that will be investigated for the 2.12 version of the language are trait parameters. More information can be found at http://www.scala-lang.org/news/roadmap-next/.

In the following few sections, we will we will see the traits from different points of view and try to give you some ideas about how they can be used.

Traits as interfaces

Traits can be viewed as interfaces in other languages, for example, Java. They, however, allow the developers to implement some or all of their methods. Whenever there is some code in a trait, the trait is called a mixin. Let's have a look at the following example:

trait Alarm { 
  def trigger(): String 
}

Here Alarm is an interface. Its only method, trigger...

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