I'm a bit puzzled. I have a complex data structure like: 
$foo = { 'SOMETHING_01' => {
                             'CLASS' => [
                                          {
                                            'VALUE' => 'BUBBLE'
                                          }
                                        ],
                           }
       }

[download]

obviously tons of references. My understanding was that %{$foo->{'SOMETHING_01'}} would dereference SOMETHING_01 so that I could copy and change the data without messing up $foo.
I'm doing:

my $fee;
%{$fee->{'SOMETHING_02'}} = %{$foo->{'SOMETHING_01'}};
$fee->{'SOMETHING_02'}{CLASS}[0]{VALUE} = 'SQUEEK';

[download]

but now $foo is changed. (!) Any ideas on how I can accomplish this?

Thanks,
Alex

In reply to Forcing dereference by blahblah

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.