amma has asked for the wisdom of the Perl Monks concerning the following question:

p_abc_xyz_123.txt

p_abc_xyz.txt

p_abc.txt

are the files I require among many files

I will be given only one file name p_abc_xyz_123.txt. I have to find the remaining above files. open each file for writing and write few statements in files depending on pattern macthing

Any initial codes that would help me

Replies are listed 'Best First'.
Re: Files in a directory
by choroba (Cardinal) on Apr 28, 2013 at 10:42 UTC
    Use split: 
    #!/usr/bin/perl
use warnings;
use strict;
use feature qw(say);

my $filename            = 'p_abc_xyz_123.txt';
my ($basename, $suffix) = split /\./, $filename;
my @parts               = split /_/,  $basename;

for my $i (1 .. $#parts) {
    say join('_', @parts[0 .. $i]), ".$suffix";
}

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Re: Files in a directory
by hdb (Monsignor) on Apr 28, 2013 at 11:10 UTC

    I always prefer regexes, but have to admit that choroba's proposal is much cleaner. 

    use strict;
use warnings;
my $filename = "p_abc_xyz_123.txt";
print "$1$2$3\n" while( $filename =~ s/(.*)(_\w{3})(\..*)/$1$3/ );

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