in reply to Reference Notation
Assuming that $href->{$dn}->{$mail} contains an array reference, then your choices are:
@{ $$href{dn}{mail} }; # or @{ $href->{dn}{mail} }; # or @{ $href->{dn}->{mail} };
to refer to the whole array and
$$href{$dn}{mail}[0]; # or $href->{dn}{mail}[0]; # or $href->{dn}->{mail}->[0]; ## yawn! :) # or ...
to refer to the individual elements.
However, there is a useful though slightly obscure way of simplifying the access to deeply nested structures without needing to copy data into temporary variables.
## Make the localised glob *mail ## act as an alias to the nested array { local *mail = $ref->{dn}{mail}; print @mail; ## Print the whole array print $mail[0]; ## The first element } ## *mail reverts to it's old value here.
It's especially useful when you have to do a whole bunch of accesses to the elements of some deeply nested structureal element.
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Re^2: Reference Notation
by eric256 (Parson) on Jul 16, 2004 at 19:05 UTC | |
by BrowserUk (Patriarch) on Jul 16, 2004 at 19:16 UTC | |
by eric256 (Parson) on Jul 16, 2004 at 22:37 UTC |
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Seekers of Perl Wisdom