http://www.perlmonks.org?node_id=577799


in reply to Adding values from an array to a hash

Now I think that this setup is really annoying, easpecially as I would like rewrite it so that every value is counted to represent how often a location has been added. Is there a way to add onto the old hash instead of completely rewriting it?

I'm not really sure if I understand your question, but you probably either want

%locations=(%locations, map {$_ => 1} @locations);

or

$locations{$_}++ for @locations;