I tried your script and it seems to produce nice output however it's possible to break it. In sub learn files:
        my $file_info = stat($File::Find::name);
        $dirs{$File::Find::dir}{size} += $file_info->size;

[download]
you don't check the return status of stat. If $File::Find::name is a broken link, stat may fail (it does on my system) and you get the following error:
Can't call method "size" on an undefined value at ./files.pl line 50.

[download]
As a general rule of thumb, you should always check the return value of things that might fail (which includes almost any call related to the file system). It might also be possible to break this with a race condition where $File::Find::name was deleted prior to the stat.

In reply to Re: Complete Directory+Depth Listing by RhetTbull
in thread Complete Directory+Depth Listing by gryphon

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.