June 2016
Intermediate to advanced
1168 pages
38h 16m
English
Content preview from Computer Science: An Interdisciplinary Approach
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Q&A
Q. Do instance variables have default initial values that we can depend upon?
A. Yes. They are automatically set to 0 for numeric types, false for the boolean type, and the special value null for all reference types. These values are consistent with the way Java automatically initializes array elements. This automatic initialization ensures that every instance variable always stores a legal (but not necessarily meaningful) value. Writing code that depends on these values is controversial: some experienced programmers embrace the idea because the resulting code can be very compact; others avoid it because the code is opaque to someone who does not know the rules.
Q. What is null?
A. It is a literal value that refers to no object. Using the ...
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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.