perl command understanding Post: 302454080

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need help understanding perl script error

I solicited this site earlier this week and got a good answer for a perl Script so I made this script from what understood from the answers But now I have a bug and I'm stump. It doesn't parse correctly the Output it stays on the first line My $f2 and reprints in a endless loop I'm sure there...

2. UNIX for Dummies Questions & Answers

Perl Meta character understanding

Hello All, I have some expression: if (/^(\d\d\d\d\d\.\d\d\d\d\d\d)\s+(.+)$/) { warn "$argv0(" . __LINE__ . "): rbl2ts{$2} == '$rbl2ts{$2}' \$1==$1\n" if ($debug); $rbl2ts{$2} = $1 if (!defined($rbl2ts{$2}) or ($1 le $rbl2ts{$2})); warn "$argv0(" . __LINE__ . "):...

3. Shell Programming and Scripting

Perl: Understanding @allwords

Hi guys, Here is the code: my @allwords = (); my %seen=(); foreach my $curr (@allwords) { $seen{$curr} = 1; } @allwords = keys %seen; my question is: what will @allwords now contain, or how would the entries in the @allwords array be different after this manipulation? Thank...

4. Shell Programming and Scripting

Understanding perl statement

can someone help me how to interpret this line? my ($class, $hashref) = @_; my $portfolio = {}; if ($hashref->{portfolio_id}) { ($portfolio) = GEmySQL->get ("select * from portfolio where portfolio.id=$hashref->{portfolio_id}"); } =============== Question: how do...

5. Shell Programming and Scripting

Help understanding Perl code.

Well, I found myself trying to fix some Perl code (Ive never done any Perl in my life) and I pinpointed the place where the bug could be. But to be sure I have to know what does a few line of code mean: $files_lim =~ (/^\d*$/) $files_lim =~ (/^\d*h$/)$files_age =~ s/h//The code where this was...

6. Shell Programming and Scripting

Help understanding some Perl code.

7. Programming

Understanding perl code

What is the difference between the two statements below? A: $a->{"$fruit"}->{"$color"}->{size} = $size B: $size = $a->{"$fruit"}->{"$color"}->{size} Please assist. Thanks!

8. Shell Programming and Scripting

understanding thread in perl

Hi all, I am trying to build threads which will go to localhost and list the files in given folder. #!/usr/bin/perl use threads; my $t1 = threads->new(\&sub1, 1); my $t2 = threads->new(\&sub2, 2); push(@threads,$t1); push(@threads,$t2); foreach...

9. Shell Programming and Scripting

Help with perl code understanding

Hi, I need to understand below perl code, can some one advise me. perl -MDate::Parse -e'BEGIN{$main::now=time;$main::old=(time-60*30)}' -nE'if(/^(\w+\s+\d+\s+\d+:\d+:\d+)/) {$t=str2time $1; $t > $old && $t < $now && print}'

10. Shell Programming and Scripting

Help understanding perl script

Hello, A former sys admin placed this script on one of our boxes and it needs to be adjusted, but I'm not familiar with perl. Can someone help break this down for me? I'm particularly interested in the -mtime function. What's the time frame being referenced here. ...

LEARN ABOUT DEBIAN

module::install::external

Module::Install::External(3pm)				User Contributed Perl Documentation			    Module::Install::External(3pm)

NAME

       Module::Install::External - Specify dependencies on external non-Perl things

DESCRIPTION

       "Module::Install::External" provides command that allow you to declaratively specify a dependency on a program or system that is not Perl.

       The commands it provides are similar to those in Module::Install::Can, except that they implement an explicit dependency, in addition to
       just working out if the particular thing is available.

COMMANDS

   requires_xs
	 requires_xs;

       The "requires_xs" command explicitly specifies that a C compiler and the perl header files are required in order to build (at make-time)
       the distribution (specifically XS files).

       It does not take any params, and aborts the Makefile.PL execution in a way that an automated installation or testing system will interpret
       as a "NA" ("not applicable to this platform") result.

       This may be changed to an alternative abort result at a later time.

       Returns true as a convenience.

   requires_external_cc
	 requires_external_cc;

       The "requires_external_cc" command explicitly specifies that a C compiler is required in order to build (at make-time) the distribution.

       It does not take any params, and aborts the Makefile.PL execution in a way that an automated installation or testing system will interpret
       as a "NA" ("not applicable to this platform") result.

       This may be be changed to an alternative abort result at a later time.

       Returns true as a convenience.

   requires_external_bin
	 requires_external_bin 'cvs';

       The "requires_external_bin" command takes the name of a system command or program, similar to the "can_run" command, except that
       "requires_external_bin" checks in a way that is a declarative explicit dependency.

       The takes a single param of the command/program name, and aborts the "Makefile.PL" execution in a way that an automated installation or
       testing system will interpret as a "NA" ("not applicable to this platform") result.

       Returns true as a convenience.

TO DO

       Work out how to save the external dependency metadata, in agreement with the larger Perl community.

       Implement the agreed external dependency metadata solution.

AUTHORS

       Adam Kennedy <adamk@cpan.org>

SEE ALSO

       Module::Install

COPYRIGHT

       Copyright 2006 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       See <http://www.perl.com/perl/misc/Artistic.html>

perl v5.14.2							    2012-03-01					    Module::Install::External(3pm)