%h     = (key1 => 'content1', key2 => 'content2'); 
$h{FLIPPED} = { map {$h{$_}, $_ } (keys %h) };

print "$h{key1} : $h{FLIPPED}{content1}\n";

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Wouldn't it be nice if perl provided 'FLIPPED' as a magical hash key to automatically make available the flipped contents of a hash? Is there a simpler way to do this?

In reply to auto-magical flipped hashes by gregorovius

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