blah

#!/usr/bin/env ruby

require 'set'

class Foo
  def initialize(name)
    @name = name
  end

  def eql?(other)
    self.hash == other.hash
  end

  def hash
    @name.hash
  end
end

set = Set.new
set << Foo.new('foo')
set << Foo.new('foo')
set << Foo.new('bar')

p set #=> #<Set: {#<Foo:0x00000100821698 @name="foo">, #<Foo:0x000001008215f8 @name="bar">}>