October 2006
Intermediate to advanced
720 pages
17h 56m
English
Content preview from Oracle Database 10g Express Edition PHP Web Programming
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Defining and Using Inheritance and Polymorphism
Object-oriented (OO) programming languages demand a change in thinking, but sometimes you may find yourself asking why. The foregoing part of this chapter explains the mechanics of building object types as libraries. You can also build libraries by developing a collection of functions. While building libraries of object types requires more effort and design than building collections of functions, the return on your investment of time is their extensibility.
Objects are extensible because you can add to their capabilities by building subclasses. Subclasses inherit the behaviors of other class, which become known as superclasses. Subclasses can also override the behaviors of their superclass by creating ...
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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.