December 2015
Intermediate to advanced
240 pages
4h 57m
English
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Different implementations of the observer
The following implementations are available for the observer pattern:
- Event dispatcher/listener
- Publish/subscribe
Let's understand both the implementations in detail.
Event dispatcher/listener
The event dispatcher/listener (event emitter) implementation allows broadcasting data to more than one consumer. EventEmitter can be inherited in the case of more than one event represented by one object. We can use the on function for the EventEmitter implementation in the observer pattern to define objects for listening to an event. Objects in the event dispatcher implementation uses custom events that can be inherited from an event dispatcher object. It uses different kind of strings to identify the type of the event. ...
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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.