February 2001
Beginner to intermediate
448 pages
9h 2m
English
Content preview from Korn Shell Programming by ExampleBecome 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 4. Regular Expressions
Many UNIX programs, languages, editors, and shells use regular expressions. They are a way of describing a set of strings through pattern-matching. When you use the expression, “That's cool,” you are not presenting literal information on the temperature of the object. You probably are trying to indicate that the object is good, or interesting, or well done, or acceptable, or neat, or…cool.
Similarly, expressions are used by the shell and by utilities to represent an aggregate of string information in a succinct manner.
This chapter teaches you the following:
The value of regular expressions in scripts
How to represent groups of characters through character classes
How to use special pattern-matching characters
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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.