Okay, here's my very cheesy entry. It actually doesn't follow the rules, but it's the best I could do ;) I at least followed the intent (on finding missing files).

You pass missing a list of files (which must be presorted :) and it will return all the missing ones. No other options are available, but in the case of a directory of files, it works. 

sub missing { 
  for$x(($_[0]=~/(.+)\..+/)[0]..($_[$#_]=~/(.+)\.(.+)/)[0])
  {push@x,"$x.$2" unless grep$x eq(/(.+)\..+/)[0],@_};@x; 
}

print missing qw (bar001.jpg bar002.jpg bar010.jpg);

[download]
That's 111 characters. It's sloppy, it's very confined and it's not compliant. But shoot, I couldn't do it correctly. I should add, however, that mine version doesn't require the filenames to start with "bar" or end with ".jpg". They can be anything. The missing function properly handles most things.

In reply to Re: Perl Golf Proposal by mr.nick
in thread Perl Golf Proposal by sharle

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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! —
  • 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:
    & &amp;
    < &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.