June 2005
Beginner
480 pages
10h 31m
English
Content preview from SAMS Teach Yourself Perl in 24 Hours THIRD EDITION
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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.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.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.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.
Q&A
| Q1: | Are substr, index, and rindex really necessary? Why do they exist when regular expressions can be used for most of those operations? |
| A1: | First, regular expressions for simple string searches are generally slower than index and rindex. Second, writing substitution expressions for fixed character positions with regular expressions can be messy; substr is a much more elegant solution sometimes. Third, Perl is a rich language. Use what you like; you have plenty of choices. |
| Q2: | What happens with substr (or index or rindex) if I specify an index that's beyond the end of the scalar? |
| A2: | One nice thing about computers is that they're consistent and have limitless amounts of patience. With questions like “What happens if I…?” sometimes just trying ... |
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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.
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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.