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Learning Scala Programming

You're reading from   Learning Scala Programming Object-oriented programming meets functional reactive to create Scalable and Concurrent programs

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Product type Paperback
Published in Jan 2018
Publisher Packt
ISBN-13 9781788392822
Length 426 pages
Edition 1st Edition
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Author (1):
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Vikash Sharma Vikash Sharma
Author Profile Icon Vikash Sharma
Vikash Sharma
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Table of Contents (16) Chapters Close

1. Getting Started with Scala Programming FREE CHAPTER 2. Building Blocks of Scala 3. Shaping our Scala Program 4. Giving Meaning to Programs with Functions 5. Getting Familiar with Scala Collections 6. Object-Oriented Scala Basics 7. Next Steps in Object-Oriented Scala 8. More on Functions 9. Using Powerful Functional Constructs 10. Advanced Functional Programming 11. Working with Implicits and Exceptions 12. Introduction to Akka 13. Concurrent Programming in Scala 14. Programming with Reactive Extensions 15. Testing in Scala 16. Other Books You May Enjoy

Traits as mix-ins


The way we do trait mix-ins is no different than inheriting any class in Scala; the only difference is that you can mix-in more than one trait and for that we have this nice keyword called with. Why do we call it mix-in? We could have called it something else. Well, yes but this explains almost everything you can do with traits. It's easy to modify or add up behaviors to an already existing functionality or construct without affecting already existing behavior. We'll see that in a bit. Traits can be used in a variety of use cases such as:

  • Composable mix-ins; to make already existing interfaces richer
  • Stackable modifications

Traits as composable mix-ins

By composable mix-ins we mean that we can create an instance of a particular type, with mix-ins of a trait, that can have certain additive functionalities. If you're thinking why would we want to do that, then the answer is maybe you want to add some particular behavior that makes sense to your functionality and you want it to...

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