gistfile1.rb

#!/usr/bin/ruby

class SortMe
  attr :foo
  attr :bar
  
  def initialize(foo, bar)
    @foo = foo
    @bar = bar
  end
end


a = SortMe.new("eins", true)
b = SortMe.new("zwei", false)
c = SortMe.new("zwei", true)
d = SortMe.new("vier", true)

list = [a, b, c, d]

list.sort_by{ |f| [f.foo, f.bar == true ? 1 : 0] }