Hi, monks!

I'm wondering if some of you know if exists an effective trick for copying a hash. I mean, does exists some method that allows to duplicate a hash or an array, entirely, creating new references when necessary (not copying the references)? ... (difficult to explain ...)

For example, if i have this array: 

@a = ([1,2,3],[a,b,c]);

[download]
Which is compossed by two references to other arrays (ARRAY(0x814cc20), ARRAY(0x819eae0)) p.e.
I want to make a new copy of that array, and a new copy of each sub-element referenced, with the same content. 
(ARRAY(0x814aaaa), ARRAY(0x819bbbb))

[download]
Dumping the element to a file, and re-reading is the only way? ... or does it copy the references to a file, so when you load it, perl can allocate the elements on the same memory position? ...
In c++, for make a copy of an object programmers must implement the copy constructor ... I think, i can do the same in perl (with little problems like, how can I allocate new memory, or how can I make the same as memcpy ... bad habits ^_^>), but after, i've saw the power of the Dumpvalue module ... i cant think in other way to do it ...

Thanks, :-)

turo

perl -Te 'print map { chr((ord)-((10,20,2,7)[$i++])) } split //,"turo"'

In reply to Dump, Dup or Copy an object by turo

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.