Hello negativ_m. FYI sort in computing is most of the time used to mean order (eg: from smallest to bigest). Here it rather looks like you want to select some elements out of your list. In your case, you want an unique file for each number. In perl, there's one thing that does uniqueness well: hashes. You could do something like:

use Data::Dumper;
my %uniq;
for my $file (@ar1)
{
  my ($number,) = $file =~ /(\d+)/;
  $uniq{$number} = $file;
}

print Dumper \%uniq;
my @values = values %uniq;
[download]

This will not do exactly what you want, you'll have to add a condition to only replace the value in $uniq{$number} if the current file has a higher letter than the one already stored. You can compare two strings with gt and lt. eg: "text2g.txt" gt "text2a.txt".

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.