Re: Buffer output?
On Mon, 22 Jul 2002 10:40:29 +0300, [EMAIL PROTECTED] (Octavian Rasnita)
wrote:
Hi all,
I've seen the following line in more Perl scripts and even in some Perl
books, but it wasn't very well explained.
$|=1; ## Don't buffer output
What does it mean to buffer output?
Which is the difference if the $| is 0 or 1?
If you want a nice demo of the buffering problem, run
this:
###
#!/usr/bin/perl
#without a newline, it won't print
#until the buffer is 2k
#$|=1; # try it with and without this line commented :-)
while (1){
print 'aa';
select(undef,undef,undef,.03);
}
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Buffer output?
Hi all, I've seen the following line in more Perl scripts and even in some Perl books, but it wasn't very well explained. $|=1; ## Don't buffer output What does it mean to buffer output? Which is the difference if the $| is 0 or 1? Thank you. Teddy Center: http://teddy.fcc.ro/ Mail: [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Buffer output?
Octavian Rasnita wrote: I've seen the following line in more Perl scripts and even in some Perl books, but it wasn't very well explained. $|=1; ## Don't buffer output What does it mean to buffer output? Which is the difference if the $| is 0 or 1? perldoc perlfaq5 -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Buffer output?
Teddy, $|=1; is supposed to perl to print to standard out right away instead of buffer information. You see, by default Perl buffers what it is going to print out until the buffer is full, then prints. For some reason, when I use $|=1; It seems that the first output to STDOUT is buffered, but once it prints the initial buffered part, everything after that is printed immediately. Regards, David - Original Message - From: Octavian Rasnita [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, July 22, 2002 1:40 AM Subject: Buffer output? Hi all, I've seen the following line in more Perl scripts and even in some Perl books, but it wasn't very well explained. $|=1; ## Don't buffer output What does it mean to buffer output? Which is the difference if the $| is 0 or 1? Thank you. Teddy Center: http://teddy.fcc.ro/ Mail: [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
