September 2015
Intermediate to advanced
250 pages
6h 40m
English
Content preview from Pragmatic ScalaBecome 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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Decorating with Traits
You can use traits to decorate objects with capabilities—see the Decorator pattern in Gamma et al.’s Design Patterns: Elements of Reusable Object-Oriented Software [GHJV95]. This pattern can help keep the inheritance hierarchy relatively flat while providing reasonable extensibility. We’ll explore this pattern, and how traits play a vital role, with an example.
Suppose we want to run different checks on an applicant—credit, criminal records, employment, and so on. We’re not interested in all the checks all the time. An applicant for an apartment may need to be checked for credit history and a criminal record. On the other hand, an applicant for employment may need to be checked for a criminal record and previous employment. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.