From: Dave Bass <davebass@...>
Date: 2008-05-28T22:30:01+09:00
Subject: Re: Merge collections of objects

Put your employees into a single array.
Use the .uniq! method to remove duplicates.

C:\> irb
irb(main):001:0> arr1 = [ "a", "b", "c" ]
=> ["a", "b", "c"]
irb(main):002:0> arr2 = [ "a", "b" ]
=> ["a", "b"]
irb(main):003:0> arr3 = arr1 + arr2
=> ["a", "b", "c", "a", "b"]
irb(main):004:0> arr3.uniq!
=> ["a", "b", "c"]
irb(main):005:0>

Now make this more compact. :-)
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