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$dbm{'name'} = $name overwrites the previes entry
$dbm{$name'} = $name creates redundant Aaron Aaron
$dbm{$name}; creates Useless use of DBM error
$dbm{$name} = ""; writes Aaron

$dbm{'name'} = $name overwrites the previes entry
# Yes, quite correct
...
# no it doesn't, I'm betting. $dbm{$name} should be an
 empty string now.

$name = Aaron;
$dbm{$name} = $name;
...
$dbm{$name'} = $name;
print $dbm{$name'};