Calling an instance constructor? Yuck! If you want to clone an object, use the right tool, such as Clone: 
use strict;
use Clone qw(clone);

my $foo = foo->new(5);
my $bar = clone($foo);

print $bar->id(), "\n";

package foo;
use strict;

sub new {
   my ($class,$id) = @_;
   my $self = {
      id => $id || 42,
   };
   return bless $self,$class;
}

sub id {
   my ($self,$id) = @_;
   return $self->{id} unless $id;
   $self->{id} = $id;
}

[download]
or provide your own clone() method for the class. I really recommend that you read TheDamian's excellent book, Object Oriented Perl, by the way.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to (jeffa) 3Re: My first stab at OO perl... by jeffa
in thread My first stab at OO perl... by Theseus

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.