January 2011
Intermediate to advanced
1648 pages
70h 30m
English
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Base Class Constraints
Not just interfaces can be used to constrain a type parameter to only those types that implement it; base classes can also be used to enforce a similar relationship. You can constrain a type parameter such that only subclasses of a specified base class can be used to instantiate the parameter:
Enforcement of the constraint is similar to what we’ve seen with interfaces. The following will work fine, for the obvious reason that every Jonagold is an Apple:
Notice that generics go hand in hand with the well-known capability to ...
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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.