February 2020
Intermediate to advanced
412 pages
9h 36m
English
Content preview from Learning RxJava - Second Edition
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Concatenating factories and operators
Concatenation is remarkably similar to merging, but with an important nuance: it emits items of each provided Observable sequentially and in the order specified. It does not move on to the next Observable until the current one calls onComplete(). This makes it great to ensure that the merged Observable starts emitting in a guaranteed order. However, it is often a poor choice for infinite Observable, as it will indefinitely hold up the queue and forever leave the Observable that is next in line waiting.
We will cover the factories and operators used for concatenation. You will find that they are much like the merging ones, except that they have sequential behavior.
You should prefer concatenation when ...
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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.
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.