December 2015
Intermediate to advanced
144 pages
3h 37m
English
Content preview from Reactive Programming with RxJSBecome 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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Chapter 5Bending Time with Schedulers
As soon as I discovered RxJS, I started using it in my projects. For a while I thought I knew how to use it effectively, but there was a nagging question: how do I know whether the operator I’m using is synchronous or asynchronous? In other words, when exactly do operators emit notifications? This seemed a crucial part of using RxJS correctly, but it felt a bit blurry to me.
The interval operator, I thought, is clearly asynchronous, so it must use something like setTimeout internally to emit items. But what if I’m using range? Does it emit asynchronously as well? Does it block the event loop? What about from? I was using these operators everywhere, but I didn’t know much about their internal concurrency ...
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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.
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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.