You could just add the new keys to the existing hash and make the same data serve both sets of keys:

foreach my $user (keys %dateuserfile) {
    for (keys %{$dateuserfile{$user}}) {
        $dateuserfile{$_}{$user} = $dateuserfile{$user}{$_};
    }
}

[download]
I won't vouch for the purity of design, but it ought to be efficient, giving two views of the identical data. Updates from one view will be seen from the other.

Update: ichimunki, rewrite line 5 as $hash{bar}{foo} = $hash{foo}{bar};. You're copying the value by including the deepest key. Leave off that last key and you get a copy ot the reference to the hash where it lives.

After Compline,
Zaxo

In reply to Re: creating multiple views of a hash by reordering its key and values by Zaxo
in thread creating multiple views of a hash by reordering its key and values by princepawn

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