March 2017
Intermediate to advanced
821 pages
18h 21m
English
Content preview from JavaScript: Moving to ES2015
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Singleton
The Singleton pattern is perhaps the most overused pattern. It is also a pattern that has fallen out of favor in recent years. To see why people are starting to advise against using Singleton let's take a look at how the pattern works.
Singleton is used when a global variable is desirable, but Singleton provides protection against accidentally creating multiple copies of complex objects. It also allows for the deferral of object instantiation until the first use.
The UML diagram for Singleton looks like the following:
It is clearly a very simple pattern. The Singleton acts as a wrapper around an instance of the class and the singleton itself ...
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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.