Greetings Monks!

This may have been asked (and answered) before, but I didn't run across it in the search tool.

My question is this: Is there a way that an anonymous sub stored as a hash value can have access to its associated key?

I am imagining something that would satisfy,


$h{'abc'} = sub {
  #
  # some sort of magic currently unknown to me
  #
};

my $val = 'abc';

if ( $val eq $h{$val} ) { print "that works!",$/ }

[download]

At the moment this is just a curiosity for me, but if there is a way to do this it might come in handy sometime. If there's one thing that Perl has taught me, it's that I shouldn't jump to conclusions about what isn't possible.

PCS
I was recently asked, "Does your program know when it isn't running?"

In reply to Can an anonymous sub in a hash value know its key? by webengr

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.