Inheritance is another way to go.

package Foo;

our $count = 0;

sub new {
   my $class = (ref($_[0]) ? ref(shift) : shift);

   $count++;
 
   return bless({ @_ }, $class);
}

package Bar;

our @ISA = ('Foo');

sub new {
   my $self = SUPER::new(@_);

   #Anything unique to this class can now be applied to the object...


   return $self;
}

[download]

I often use this approach when there are several attributes guaranteed to be present in all of the instances, such as the name of the creature or whatever. Also, thanks to inheritance, you can place any methods that all of these classes should support into the base class.

I hope this helps, I've only been awake for... about 3 minutes now, so my interpretation of your question may be a little... off...

Edit/Note: SUPER::new is a common trick used in many object oriented languages when the parent contstructor has code to take care of a lot of the setup work.


My code doesn't have bugs, it just develops random features.

Flame ~ Lead Programmer: GMS (DOWN) | GMS (DOWN)

In reply to Re: Creating Common Constructor by Flame
in thread Creating Common Constructor by DeadPoet

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.