December 2015
Intermediate to advanced
298 pages
5h 30m
English
Content preview from Scala Functional Programming PatternsBecome 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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Parser combinators
Parsers are everywhere. A Scala program text needs to be parsed first for it to run. We parse a JSON to get at the data structure. We then try to make sense of the text and pull out something useful from it.
Parsing may succeed or fail. For example, the text may not have what we are looking for. It may have something else equally interesting. At times, we'll want to retry different parsers on a piece of text, hoping that one of them might succeed.
A parser looking for a number in the string how do you do? will fail as there is no number. However, a parser looking for greetings will succeed.
The idea behind Scala's Parser combinators is to compose more complex parsers from simpler ones. We compose parsers that can be tried one after ...
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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.