June 2002
Beginner
759 pages
80h 42m
English
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Name
alarm
Synopsis
alarm n
Sends a SIGALRM
signal to the executing Perl program after
n seconds. On some older systems,
alarms go off “at the top of the second,” so, for instance, an
alarm 1 may go off anywhere
between 0 to 1 seconds from now, depending on when in the current
second it is. An alarm 2 may go
off anywhere from 1 to 2 seconds from now. And so on.
Each call disables the previous timer, and an argument of
0 may be supplied to cancel the
previous timer without starting a new one. The return value is the
number of seconds remaining on the previous timer.
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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.
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.