From: Joel Pearson <lists@...>
Date: 2012-11-06T22:33:44+09:00
Subject: Re: How to merge two or more hashes in to one?

Off the top of my head I'd just do this:

foo.each do |one,two|
foo[one] << bar[one]
foo[one].flatten!
foo[one].uniq!
end

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