07-24-2008
\1 is a backreference to what is matched in the parenthesis in the regexp. So /(.)\1/ finds a double occurance of whatever (.) matched. It is similar to $1 but is used inside the regexp. It is discussed in some detail here:
perlretut - perldoc.perl.org
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1. Shell Programming and Scripting
Hi,
Can anyone help me to find regular expression for the following in Perl?
"The string can only contain lower case letters (a-z) and no more than one of any letter."
For example: "table" is accepted, whether "dude" is not.
I have coded like this:
$str = "table";
if ($str =~ m/\b()\b/) {... (4 Replies)
Discussion started by: evilfreakz
4 Replies
2. Shell Programming and Scripting
I have got numbers like
l255677
l376039
l188144
l340482
l440700
l254113
to match the numbers starting with '13' what would be the regex
=~/13(.*)/ =======>This is not working ....
But for user123,user657
regex =~/user(.*)/ ========>works
Thanks for help..!! (7 Replies)
Discussion started by: trina_1
7 Replies
3. Shell Programming and Scripting
I am having trouble parsing rpm filenames in a shell script.. I found a snippet of perl code that will perform the task but I really don't have time to rewrite the entire script in perl. I cannot for the life of me convert this code into something sed-friendly:
if ($rpm =~ /(*)-(*)-(*)\.(.*)/)... (1 Reply)
Discussion started by: suntzu
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4. UNIX for Dummies Questions & Answers
Hi,
I get the following when I cat a file *.log
xxxxx
=====
dasdas gwdgsg fdsagfsag agsdfag
=====
random data
=====
My output should look like :
If the random data after the 2nd ==== is null then OK should be printed else
the random data should be printed.
How do I go about this... (5 Replies)
Discussion started by: manutd
5 Replies
5. Programming
HI,
I'm new to perl and need simple regex for reading a file using my perl script.
The text file reads as -
filename=/pot/uio/current/myremificates.txt
certificates=/pot/uio/current/userdir/conf/user/gamma/settings/security/... (3 Replies)
Discussion started by: jhamaks
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6. Programming
Hi Guys
I have the following regex
$OSRELEASE = $1 if ($output =~ /(Mac OS X (Server )?10.\d)/);
output is currently
Mac OS X 10.7.5
when the introduction of Mac 10.8 output changes to
OS X 10.8.2
they have dropped the Mac bit so i changed the regex to be (2 Replies)
Discussion started by: ab52
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7. Programming
Hello,
I'm trying to get a quick help on regex since i'm not a regular programmer.
Below is the line i'm trying to apply my regex to..i want to use the regex in a for loop and this line will keep on changing.
subject=... (4 Replies)
Discussion started by: jhamaks
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8. Shell Programming and Scripting
Could anyone please make me understand how the ?= works below ..
After executing this I am getting the same output.
$string="I love chocolate.";
$string =~ s/chocolate(?= ice)/vanilla/;
print "$string\n"; (2 Replies)
Discussion started by: scriptscript
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9. Shell Programming and Scripting
I am not a big expert in regex and have just little understanding of that language.
Could you help me to understand the regular Perl expression:
^(?!if\b|else\b|while\b|)(?:+?\s+){1,6}(+\s*)\(*\) *?(?:^*;?+){0,10}\{
------
This is regex to select functions from a C/C++ source and defined in... (2 Replies)
Discussion started by: alex_5161
2 Replies
10. Shell Programming and Scripting
Experts -
I found a script on one of the servers that I work on and I need help understanding
one of the lines.
I know what the script does, but I'm having a hard time understanding the grouping.
Can someone help me with this?
Here's the script...
#!/usr/bin/perl
use strict;
use... (2 Replies)
Discussion started by: timj123
2 Replies
LEARN ABOUT DEBIAN
svn::class::info
SVN::Class::Info(3pm) User Contributed Perl Documentation SVN::Class::Info(3pm)
NAME
SVN::Class::Info - Subversion workspace info
SYNOPSIS
use SVN::Class;
my $file = svn_file( 'path/to/file' );
my $info = $file->info;
printf "repository URL = %s
", $info->url;
DESCRIPTION
SVN::Class::Info represents the output of the "svn info" command.
METHODS
SVN::Class::Info does not inherit from SVN::Class, but only Class::Accessor::Fast.
new( $dir->stdout )
Creates new SVN::Class::Info instance. The lone argument should be an array ref of output from a call to the SVN::Class object's info()
method.
You normally do not need to use this method directly. See the SVN::Class info() method.
dump
Returns dump() of the object, just like SVN::Class->dump().
url
Get the URL value. Returns a SVN::Class::Repos object.
path
wc_root
Working Copy Root Path
name
root
rev
node
schedule
author
last_rev
date
updated
checksum
uuid
Get/set the info params. These are really only useful as accessors (getters).
AUTHOR
Peter Karman, "<karman at cpan.org>"
BUGS
Please report any bugs or feature requests to "bug-svn-class at rt.cpan.org", or through the web interface at
http://rt.cpan.org/NoAuth/ReportBug.html?Queue=SVN-Class <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=SVN-Class>. I will be notified,
and then you'll automatically be notified of progress on your bug as I make changes.
SUPPORT
You can find documentation for this module with the perldoc command.
perldoc SVN::Class
You can also look for information at:
o AnnoCPAN: Annotated CPAN documentation
http://annocpan.org/dist/SVN-Class <http://annocpan.org/dist/SVN-Class>
o CPAN Ratings
http://cpanratings.perl.org/d/SVN-Class <http://cpanratings.perl.org/d/SVN-Class>
o RT: CPAN's request tracker
http://rt.cpan.org/NoAuth/Bugs.html?Dist=SVN-Class <http://rt.cpan.org/NoAuth/Bugs.html?Dist=SVN-Class>
o Search CPAN
http://search.cpan.org/dist/SVN-Class <http://search.cpan.org/dist/SVN-Class>
ACKNOWLEDGEMENTS
I looked at SVN::Agent before starting this project. It has a different API, more like SVN::Client in the SVN::Core, but I cribbed some of
the ideas.
The Minnesota Supercomputing Institute "http://www.msi.umn.edu/" sponsored the development of this software.
COPYRIGHT
Copyright 2008 by the Regents of the University of Minnesota.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
Path::Class, Class::Accessor::Fast, SVN::Agent, IPC::Cmd
perl v5.14.2 2012-01-31 SVN::Class::Info(3pm)