September 2012
Beginner
744 pages
15h 48m
English
Content preview from Beginning PerlBecome 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,
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.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.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.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.
Chapter 12
Object Oriented Perl
WHAT YOU WILL LEARN IN THIS CHAPTER:
- Understanding what an object is
- Learning the three rules of Perl’s OO system
- Creating a class
- How to subclass a class
- Overloading classes
- Learning OO traps for the unwary
WROX.COM CODE DOWNLOAD FOR THIS CHAPTER
The wrox.com code downloads for this chapter are found at http://www.wrox.com/remtitle.cgi?isbn=1118013847 on the Download Code tab. The code for this chapter is divided into the following major examples:
- example_12_1_shopper.pl
- example_12_2_episode.pl
- lib/Shopper/Personal.pm
- lib/TV/Episode.pm
- lib/TV/Episode/Broadcast.pm
- lib/TV/Episode/OnDemand.pm
- lib/TV/Episode/Version.pm
- listing_12_1_episode.pl
Chapter 10 mentioned that knowledge of the sort, map, and grep functions is sort of a litmus test that some programmers use to know if a Perl developer is at least at an intermediate level. Knowledge of object-oriented programming (often referred to as OOP, or just OO) is your first step toward being an advanced Perl developer. Many languages support OO programming, and learning about it in Perl will help you in many other languages.
Two chapters discuss OOP. This chapter describes Perl’s built-in OO tools. They’re minimal, but this minimalism gives you a lot of freedom. You need to understand how Perl’s built-in OO works because much of the Perl software in the wild is written with this.
The next chapter, Chapter 13, covers Moose which is an incredibly powerful object system built on top of Perl’s OO tools. ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.