From: Jason Lillywhite <jason.lillywhite@...>
Date: 2009-03-12T14:40:27+09:00
Subject: change (and update) values of hash

how would I do stuff to each value of a hash and return a modified hash?
h = {"a"=> 3, "b"=> 5}
multiply each value by 2 and return
h = {"a"=> 6, "b"=> 10}

this does what I need but does not modify the hash

h.each {|k,v| h[k]*2}
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