From: Pit Capitain <pit.capitain@...>
Date: 2008-08-12T03:35:23+09:00
Subject: Re: Sort array by two attributes? (like sql "order by A, B")

2008/8/11 James Coglan <jcoglan@googlemail.com>:
>
> objects.sort do |a,b|
>  comp = (a.lastname <=> b.lastname)
>  comp.zero? ? (a.firstname <=> b.firstname) : comp
> end

For this usecase there's also Numeric#nonzero?

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

Regards,
Pit