From: "Jan E." <lists@...>
Date: 2012-11-07T18:26:57+09:00
Subject: Re: How to merge two or more hashes in to one?

Well, in this case I don't really see the advantage of using sets. The 
only difference it makes is that arr_1 | arr_2 becomes 
set_1.merge(set_2).

So unless you plan to actually use the special features of sets, I'd 
stick with standard arrays.

But I don't want this to turn into yet another endless discussion about 
implementation details, so do whatever you think fits best.

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