You could create accessor functions in the parent that access the children arrays, like: 
# Parent
sub get_child_id {

  my $self=shift;
  my $child=shift;
  # Find the index of the child. Left as exercise for the reader (read
+: I'm too lazy :) ).
  return $child_index;
}

[download]
Then your child can get its ID using code such as: 
# Child
sub whereami {

  my $self=shift;
  my $parent=$self->{'parent'};
  my $id=$parent->get_child_id($self);

}

[download]
Note that you have a small error in your child code, BTW: you store a reference to the reference to the parent instead of the parent ref itself. Change the line: 
my $self = {
      parent => \$parent;
   };

[download]
by 
my $self= { parent => $parent }; #$parent is a ref, you were storing a
+ ref to $parent

[download]

CU
Robartes-

Update: Changed child sub name to original poster's name: sub whereami.

In reply to Re: Child objects querying parent objects about themselves by robartes
in thread Child objects querying parent objects about themselves by vaevictus

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