August 2016
Intermediate to advanced
635 pages
14h 5m
English
book
JavaScript: Functional Programming for JavaScript Developers
by Ved Antani, Simon Timms, Dan Mantyla
Content preview from JavaScript: Functional Programming for JavaScript DevelopersBecome 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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Backreferences
After an expression is evaluated, each group is stored for later use. These values are known as backreferences. Backreferences are created and numbered by the order in which opening parenthesis characters are encountered going from left to right. You can think of backreferences as the portions of a string that are successfully matched against terms in the regular expression.
The notation for a backreference is a backslash followed by the number of the capture to be referenced, beginning with 1, such as \1, \2, and so on.
An example could be /^([XYZ])a\1/, which matches a string that starts with any of the X, Y, or Z characters followed by an a and followed by whatever character matched the first capture. This is very different from ...
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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.