March 2016
Beginner
838 pages
14h 58m
English
Content preview from Web Developer's Reference GuideBecome 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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Utilities
In the next group of modules, we will look at utilities. The functions chosen here are used across many different types of applications. We will cover everything from events and cryptology to buffers and npm.
Events
Events are used in many built-in Node objects. This is because emitting and listening for events is the perfect way to let another function know when to start executing. This is especially true in the asynchronous world of Node.js. Anytime we use the on function of an object, it means that it has inherited from EventEmitter. All of the examples will assume that the events variable is already created as follows:
var events = require('events');EventEmitter
This is the parent class that can be inherited from to create a new EventEmitter ...
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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.