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Ruby Chops: Flexible Sort

So I was messing with the comparable module and the <=> method.  I implemented as I would in Java.  Then I played with sort_by and thought that was awesome. Which led me to writing my own method that would allow me to pass in a collection and attributes to be sorted by. The objects in the collection would have to implement my Sortable module. This was more for academic fun and try to keep my mind sharp. If anyone sees a cooler way to do it then please post it here.

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