in reply to Array of Hashes or Hash of Arrays
thing?
key_list_by_value is a hash - you can tell by the { }.
$value is a hash key (looks like someone did a reverse() on %by_key. $key is a scalar.
$key_list_by_value{$value} is a reference to an array - hence the @{ }.
key_list_by_value is a hash - you can tell by the { }.
$value is a hash key (looks like someone did a reverse() on %by_key. $key is a scalar.
$key_list_by_value{$value} is a reference to an array - hence the @{ }.
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