This looks more like obfuscation to me. You declare a lexical that you don't use, and you use symbolic references ... and so your solution does not hold. Try this test harness:

my @list = (
     a => [ 'r', 'c' ],
     r => [ 'c', 'd' ],
     c => [ 'd' ],
     e => [ 'r', 'a' ],
     f => undef,
);

[download]

... and you get the following list:

'd','r','c','a','f','e'

And of course, everything is even more undefined if any of your components are called '^H', 'INC, 'ENV', or 'SIG' :-)

Update: Is this a trick? Could tadman not wait until April 1st? It seems to me no other test harness will give the right answer here. The sort function always returns 0, since those hashes it access has never been set ... :-\

Nice choice of test harness, tadman!

The Sidhekin
print "Just another Perl ${\(trickster and hacker)},"

In reply to Re: Re: (Golf) Dependency List Prioritization by Sidhekin
in thread (Golf) Dependency List Prioritization by tadman

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.