From: "Jermaine O." <lists@...>
Date: 2012-11-06T22:59:23+09:00
Subject: Re: How to merge two or more hashes in to one?

Jan E. wrote in post #1083135:
> Hi,
>
> this is a very special form of "merging", so I don't think there's a
> built-in method for this.
>
> But you can use the block form of Hash#merge:
>
> #-------------------------------------
> foo = {"luxuy" => ["Mercedes", "BMW"], "sport" => ["Ferrari"]}
> bar = {"luxuy" => ["BMW", "Bentley"], "sport"=>["Lamborghini"]}
>
> merg = foo.merge bar do |_, arr_1, arr_2|
>   arr_1 | arr_2  # array union
> end
> p merg
> #-------------------------------------

Thanks, that worked out, but I'm wondering how this applies when I have 
more than 2 hashes. Because then this wouldn't work.

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