Lhamo_rin, i don't know what you are really going to achieve, but as per your input and output, i assume, you can accomplish using regex as shown below.

$filename = 'FileName'; #any filename
$string = 'FileName.089-09_08_45';
$string =~ s/^$filename\.(\d{2})\d/$1/;
print $string;

output:
08-09_08_45
[download]

$string = 'FileName.089-09_08_45';
$string =~s#([a-z\.]+)(\d{2})\d#$2#gsi;
#or
$string =~s#.*?(\d{2})\d(\-[\d|_]+)#$1$2#gsi;
print $string;
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Hi, Give some more information then only we will help you.

Anyway try this, if i understood your question correctly.

use strict;
use warnings;

my $string = "FileName.089-09_08_45";

$string =~ s/^[^\d]+//g; ##if Filename doesn't contain digits
#or
$string =~ s/^[^\.]+\.//g; ##if Filename doesn't contain dots

print $string;
__END__
089-09_08_45
[download]

If your file names are consistently like your example, use split :

use strict;
use warnings;

opendir( DIR, "/home/Lhamo/files" ) or die "painfully: $!";
my @files = readdir DIR;
closedir DIR;

for ( @files ) {
    next if ( $_ eq '..' );
    next if ( $_ eq '.' );
    my ( $filename, $code_number ) = split( /./, $_, 2 );
    print "$code_number\n";
}
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I made a mistake. I don't know where, but I always do. I haven't tested this code. Someone will point it out shortly :) In any case, you get the idea.

--
-- GhodMode

You have used the pattern /./ on which to split the string. '.' is a regular expression metacharacter which matches any single character (except the newline in multi-line matching) so your split isn't doing what you want. You should have escaped the metacharacter like this

my ($filename, $code_number) = split(/\./, $_, 2);
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so that you are splitting on a literal full-stop.

Also, your

    next if ( $_ eq '..' );
    next if ( $_ eq '.' );
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can be more neatly achieved by

    next if /^\.\.?$/;
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Cheers,

JohnGG

$string =~ s/^FileName\.//;
[download]

would do the trick.

Cheers,

JohnGG