You could use a 'factory method' to keep track of the objects you create e.g 
sub Zoo::factory {
  my($self, $class, $args) = @_;

  my $obj = "Zoo::Animal::$class"->new( $args );
  $self->{"_${class}_count"}++;

  return $obj;
}

my $zoo   = Zoo->new;
my $camel = $zoo->factory("Camel");

[download]
That code isn't complete or tested but it should give you some idea of how to go about implementing a factory method.
HTH

_________
broquaint

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

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