A unique textual identifier for each object. A name following rules and closely coupled to an object.

To get the actual reference, you'll call a class method like My::File->get_obj(symbol) to lookup in %My::File::instance

That's the "weakest" way...

Update

This allows to designs systems where warnings like "object (File/Directory) doesn't exist anymore" are possible. Think inodes!

Also keep in mind that Perl can reuse refs for new variables after destructions, tho I doubt this happens when there is still a weakened ref around. (?)

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

In reply to Re^3: Should I use weaken on an object attribute containing a reference to an object which contains reference back to original object? by LanX
in thread Should I use weaken on an object attribute containing a reference to an object which contains reference back to original object? by nysus

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.