February 2012
Intermediate to advanced
1184 pages
37h 17m
English
Content preview from Programming Perl, 4th EditionBecome 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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Per-Filehandle Variables
These special variables never need to be mentioned in a local, because they always refer to some value
pertaining to the currently selected output filehandle—each filehandle
keeps its own set of values. When you select another filehandle, the old filehandle
remembers the values it had for these variables, and the variables now
reflect the values of the new filehandle. See also the IO::Handle module.
$| ($AUTOFLUSH, $OUTPUT_AUTOFLUSH) $− ($FORMAT_LINES_LEFT) $= ($FORMAT_LINES_PER_PAGE) $~ ($FORMAT_NAME) $% ($FORMAT_PAGE_NUMBER) $^ ($FORMAT_TOP_NAME)
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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.