Hi the below perl snippet will replace any three letter string in the beginning with a two letter string which is specified..but if i want to modfiy only certain characters for eg..
ABC - AB
CAB - AB
AAA - No Modifcations
1AB - AB
AB8 - AB
Whatever coming before or after of AB only have to be deleted whereas the strings may be left as it is..
Perl Snippet
Code:
use warnings;
use strict;
while (<DATA>) {
chomp;
s/ ^ [0-9a-z]{3} $ /hi/xi;
print "$_\n";
}
Thanks Guys!!!!!
Just for additional info guys how to specify spaces in the regex for eg i need to change AB B to AB how the regex to be modified .Thanks for the help guys!!!!!!
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)
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)
Hi there
I am trying to write an if statement in perl that will return "SUCCESS" if either of these conditions are true
a) if $changes is greater than 5 AND the $force flag is set to 1
OR
b) if $changes is greater than 0 AND $changes is less than 6
#!/usr/bin/perl -w
my $force =... (5 Replies)
I am having trouble parsing rpm filenames in a shell script.. I found a snippet of perl code that will perform the task but I really don't have time to rewrite the entire script in perl. I cannot for the life of me convert this code into something sed-friendly:
if ($rpm =~ /(*)-(*)-(*)\.(.*)/)... (1 Reply)
First of all, please have mercy on me. I am not a noob to programming, but I am about as noob as you can get with regex. That being said, I have a problem.
I've got a string that looks something like this:
Publication - Bob M. Jones, Tony X. Stark, and Fred D. Man, \"Really Awesome Article... (1 Reply)
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)
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)
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)
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)
Hi,
I need some guidance with understanding this Perl script below. I am not the author of the script and the author has not leave any documentation. I supposed it is meant to be 'easy' if you're a Perl or regex guru. I am having problem understanding what regex to use :confused: The script does... (3 Replies)
Discussion started by: newbie_01
3 Replies
LEARN ABOUT DEBIAN
datetime::format::builder::parser::regex
DateTime::Format::Builder::Parser::Regex(3pm) User Contributed Perl Documentation DateTime::Format::Builder::Parser::Regex(3pm)NAME
DateTime::Format::Builder::Parser::Regex - Regex based date parsing
SYNOPSIS
my $parser = DateTime::Format::Builder->create_parser(
regex => qr/^(dddd)(dd)(dd)T(dd)(dd)(dd)$/,
params => [ qw( year month day hour minute second ) ],
);
SPECIFICATION
In addition to the common keys, "Regex" supports:
o regex is a regular expression that should capture elements of the datetime string. This is a required element. This is the key whose
presence indicates it's a specification that belongs to this class.
o params is an arrayref of key names. The captures from the regex are mapped to these ($1 to the first element, $2 to the second, and so
on) and handed to "DateTime->new()". This is a required element.
o extra is a hashref of extra arguments you wish to give to "DateTime->new()". For example, you could set the "year" or "time_zone" to
defaults:
extra => { year => 2004, time_zone => "Australia/Sydney" },
o constructor is either an arrayref or a coderef. If an arrayref then the first element is a class name or object, and the second element
is a method name (or coderef since Perl allows that sort of thing). The arguments to the call are anything in $p and anything given in
the "extra" option above.
If only a coderef is supplied, then it is called with arguments of $self, $p and "extra".
In short:
$self->$coderef( %$p, %{ $self->{extra} } );
The method is expected to return a valid DateTime object, or undef in event of failure, but can conceivably return anything it likes.
So long as it's 'true'.
THANKS
See the main module's section.
SUPPORT
Support for this module is provided via the datetime@perl.org email list. See http://lists.perl.org/ for more details.
Alternatively, log them via the CPAN RT system via the web or email:
http://perl.dellah.org/rt/dtbuilder
bug-datetime-format-builder@rt.cpan.org
This makes it much easier for me to track things and thus means your problem is less likely to be neglected.
LICENCE AND COPYRIGHT
Copyright X Iain Truskett, 2003. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.000 or,
at your option, any later version of Perl 5 you may have available.
The full text of the licences can be found in the Artistic and COPYING files included with this module, or in perlartistic and perlgpl as
supplied with Perl 5.8.1 and later.
AUTHOR
Iain Truskett <spoon@cpan.org>
SEE ALSO
"datetime@perl.org" mailing list.
http://datetime.perl.org/
perl, DateTime, DateTime::Format::Builder
perl v5.10.1 2010-03-14 DateTime::Format::Builder::Parser::Regex(3pm)