June 2018
Beginner
288 pages
6h 31m
English
Content preview from Rediscovering JavaScriptBecome 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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Wrapping Up
The newly introduced Symbol primitive type is useful to define properties and methods with unique names, like [Symbol.iterator], for example. The enhanced for loop provides an elegant, less noisy syntax, to iterate over collections of objects. To facilitate iteration over user-defined classes, JavaScript supports custom iterators and generators. The generators are lazy evaluators and may be used to create infinite streams of data.
So far we have used regular functions. In the next chapter you’ll learn about the pros and cons of arrow functions.
Exercises
You learned about Symbols, iterators, and generators, and these are some of the most important and highly used features of JavaScript. These practice exercises will help you to review ...
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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.