Dear Monks,

I need to track changes deep into a hash (or array) reference.


sub foo {
 my $self = shift;
 $self->{changed}->{foo} = shift if $#_ > -1;
 return $self->{changed}->{foo} || $self->{data}->{foo};
}

$x->foo('bar'); # This is recognized

push @{ $x->foo->{bar}->{itemlist} },1; # This isn't

[download]

(I shortened the return part of foo, the original one is also dealing with undef values correctly.)

If foo holds a hash ref, the structure below this is completely unpredictable. Converting everything into a deep object structure (= $x->foo->bar->itemlist) would take a lot of time.

(How) could the "parent" package $x get some kind of notification if any deep value is changed?

I'd like to avoid a deep comparison between $self->{data} and $self->{changed}

Thank you all

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In reply to Deep-bless a HASH by Sewi

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