ograph_test.rb

require 'rubygems'
require 'ograph'

class Foo

  attr_accessor :hey

  def initialize
    @hey = :method
  end

end

b = Foo.new
fb = {:hey => 'hello'}
a = [1,2,b, fb]

grapher = ObjectGraph.new(:ascendants => true)
grapher.graph(a)

File.open('graph.dot','w') do |file|
  file.write grapher
end
`dot -T jpeg graph.dot > hey.jpg`
`open hey.jpg`