From: James Coglan <jcoglan@...>
Date: 2008-08-12T00:27:00+09:00
Subject: Re: Sort array by two attributes? (like sql "order by A, B")

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>
> Can anyone think of a way to do the same thing with a ruby array?  For
> example, if the array holds objects that have attributes/methods
> "lastname" & "firstname", to order the objects in a similar way to the
> sql query?



Just use Enumerable#sort:
http://ruby-doc.org/core/classes/Enumerable.html#M003150

objects.sort do |a,b|
  comp = (a.lastname <=> b.lastname)
  comp.zero? ? (a.firstname <=> b.firstname) : comp
end

James
http://blog.jcoglan.com
http://github.com/jcoglan

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