April 2016
Intermediate to advanced
256 pages
4h 57m
English
Content preview from Apex Design PatternsBecome 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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The visitor pattern
A start-up company decided to create a music/song library application using Salesforce public sites and communities. Users can browse through thousands of songs, add them to the cart, and purchase them. There are many types of music genres available on websites, such as pop, rock, electronic, and so on. Prices are based on music genres; thus, during a checkout, the development team needs to maintain a list of different songs sold by genres and calculate the price accordingly. For the sake of simplicity, we will consider only three types of music in our example.
Developers decided that all the songs will share some common properties, such as a title and album name, and thus it makes sense to use inheritance. They developed 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.