February 2016
Intermediate to advanced
382 pages
8h 1m
English
Content preview from Scala Design PatternsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Traits versus classes
Traits could be similar, but also very different to classes. It could be hard for a developer to choose which one to use in various cases but here we will try to provide some general guidelines that should help.
Use classes:
- When a behavior is not going to be reused at all or in multiple places
- When you plan to use your Scala code from another language, for example, if you are building a library that could be used in Java
Use traits:
- When a behavior is going to be reused in multiple unrelated classes.
- When you want to define interfaces and want to use them outside Scala, for example Java. The reason is that the traits that do not have any implementations are compiled similar to interfaces.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.