September 2016
Intermediate to advanced
270 pages
5h 16m
English
Content preview from Mastering PHP 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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Composite
Imagine an audio system consisting of individual songs and also playlists of songs. Yes, playlists consist of songs, but we want both to be treated individually. Both are types of music, both can be played.
The Composite design pattern can help here; it allows us to ignore the differences between compositions of objects and individual objects. It allows us to treat both with identical or nearly-identical code.
Let's put together a little example; a song is our example of a leaf, with playlists being composites. Music is our abstraction of playlists and songs; therefore, we can call this our component. The client of all this is our index.php file.
By not discriminating between leaf-nodes and branches, our code becomes less complex and therefore ...
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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.