July 1998
Intermediate to advanced
1456 pages
65h 5m
English
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Name
$1, ..., $9 — NN 4 IE J3 ECMA n/a
Synopsis
Read-only
Parenthesized subcomponents of a regular expression return results.
These results are stored individually in properties labeled 1 through
9, preceded by the $ shortcut symbol. The order is
based on the position of the left parenthesis of a subcomponent: the
leftmost subcomponent result is placed into $1.
These properties may be used directly within parameters to
String methods that use regular expressions (see
the String.replace() method).
Example
RegExp.$2
Value
String.
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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.