From: Erik Veenstra <erikveen@...>
Date: 2008-07-22T23:56:17+09:00
Subject: Re: Grouping/Sorting an Array of objects

a.group_by do |o|
  o.date
end.sort.each do |date, list|
  p date

  list.group_by do |o|
    o.class
  end.sort_by do |klass, _|
    [Foo, Bar].index(klass)     # kind_of?
  end.each do |klass, list|
    list.each do |o|
      p o
    end
  end
end

gegroet,
Erik V. - http://www.erikveen.dds.nl/