[26610] in Perl-Users-Digest
Perl-Users Digest, Issue: 8722 Volume: 10
daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Fri Dec 2 11:05:27 2005
Date: Fri, 2 Dec 2005 08:05:06 -0800 (PST)
From: Perl-Users Digest <Perl-Users-Request@ruby.OCE.ORST.EDU>
To: Perl-Users@ruby.OCE.ORST.EDU (Perl-Users Digest)
Perl-Users Digest Fri, 2 Dec 2005 Volume: 10 Number: 8722
Today's topics:
Re: [Noob] IPC <tadmc@augustmail.com>
Re: FAQ 6.9 What is "/o" really for? <rvtol+news@isolution.nl>
Re: lookfor failure in SerialPort <cNaOlSePbA@MvPeLtEsAtSaEr.com>
pid <snort_sam@yahoo.com>
Re: pid <jurgenex@hotmail.com>
Re: pid <snort_sam@yahoo.com>
Re: pid <jurgenex@hotmail.com>
Digest Administrivia (Last modified: 6 Apr 01) (Perl-Users-Digest Admin)
----------------------------------------------------------------------
Date: Fri, 2 Dec 2005 06:50:16 -0600
From: Tad McClellan <tadmc@augustmail.com>
Subject: Re: [Noob] IPC
Message-Id: <slrndp0go8.2o6.tadmc@magna.augustmail.com>
noob <n00b@n00b.noob> wrote:
> I'm new in this newsgroup
Then you should probably check out the Posting Guidelines that
are posted here frequently.
> and my english is very poor because I'm
> italian.
That's fine, there is no need to apologize for that.
> I'm programming perl for 2 days and I'm still noob.
Perl ships with thousands of pages of documentation that is part
of a normal install, include some Frequently Asked Questions.
You should consult those docs as a first step to finding answers.
> My question is:
Likely to have already been asked (and answered), all you need to
do is find it.
The First Place to look is in the Perl FAQs.
> how I can to launch a script that run a group of scripts
> in parallel running and waits until the last script has finished?
I assume that you know what the "P" in IPC stands for, so:
perldoc -q process
How do I start a process in the background?
--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas
------------------------------
Date: Fri, 2 Dec 2005 16:12:05 +0100
From: "Dr.Ruud" <rvtol+news@isolution.nl>
Subject: Re: FAQ 6.9 What is "/o" really for?
Message-Id: <dmps5d.17c.1@news.isolution.nl>
PerlFAQ Server:
> 6.9: What is "/o" really for?
>
> Using a variable in a regular expression match forces a
> re-evaluation (and perhaps recompilation) each time the regular
> expression is encountered. The "/o" modifier locks in the regex
> the first time it's used. This always happens in a constant
> regular expression, and in fact, the pattern was compiled into
> the internal format at the same time your entire program was.
>
> Use of "/o" is irrelevant unless variable interpolation is used
> in the pattern, and if so, the regex engine will neither know nor
> care whether the variables change after the pattern is evaluated
> the *very first* time.
>
> "/o" is often used to gain an extra measure of efficiency by not
> performing subsequent evaluations when you know it won't matter
> (because you know the variables won't change), or more rarely,
> when you don't want the regex to notice if they do.
AFAIK, and from a certain version of Perl, the regex engine can
(always?) decide that the result of the previous interpolation is still
valid, so that even without '/o' the re-evaluation takes no significant
time.
--
Affijn, Ruud
"Gewoon is een tijger."
------------------------------
Date: Fri, 02 Dec 2005 08:18:35 -0600
From: Spin <cNaOlSePbA@MvPeLtEsAtSaEr.com>
Subject: Re: lookfor failure in SerialPort
Message-Id: <11p0ltghg1voia5@corp.supernews.com>
Spin wrote:
>
> Troubleshooting help or any advice greatfully received.
Actually, the most effective way to use lookfor in conjunction with a
serial connection is to make sure that the machine at the far end of the
cable is turned on. There are, indeed, some disadvantages to
telecommuting...
Spin
------------------------------
Date: Sat, 03 Dec 2005 00:02:52 +1100
From: bsder <snort_sam@yahoo.com>
Subject: pid
Message-Id: <43904600$1@news.rivernet.com.au>
Hi,
Can anyone please tell me how to print a process ID (PID)?
Thanks
Sam
------------------------------
Date: Fri, 02 Dec 2005 13:26:26 GMT
From: "Jürgen Exner" <jurgenex@hotmail.com>
Subject: Re: pid
Message-Id: <6YXjf.1482$fY3.845@trnddc01>
bsder wrote:
> Can anyone please tell me how to print a process ID (PID)?
perldoc -f print
perldoc perlvar
jue
------------------------------
Date: Sat, 03 Dec 2005 00:52:21 +1100
From: bsder <snort_sam@yahoo.com>
Subject: Re: pid
Message-Id: <43905198$1@news.rivernet.com.au>
bsder wrote:
> Hi,
>
> Can anyone please tell me how to print a process ID (PID)?
>
> Thanks
> Sam
I want to print a child process ID, not a script id.
Sam.
------------------------------
Date: Fri, 02 Dec 2005 14:02:16 GMT
From: "Jürgen Exner" <jurgenex@hotmail.com>
Subject: Re: pid
Message-Id: <ItYjf.5$Bs2.4@trnddc01>
bsder wrote:
> bsder wrote:
>> Can anyone please tell me how to print a process ID (PID)?
>
> I want to print a child process ID, not a script id.
Then why on earth didn't you say so to begin with but lead us on a wild
goose chase?
perldoc -f print
perldoc -f fork (oay particular attention to the return value of fork)
jue
------------------------------
Date: 6 Apr 2001 21:33:47 GMT (Last modified)
From: Perl-Users-Request@ruby.oce.orst.edu (Perl-Users-Digest Admin)
Subject: Digest Administrivia (Last modified: 6 Apr 01)
Message-Id: <null>
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End of Perl-Users Digest V10 Issue 8722
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