globals.rb

def globals(root = Module)
  root.constants.collect do |name|
    object = eval(name) rescue nil
    if (object === Module || object === Class)
      name
    elsif (object.is_a?(Module) || object.is_a?(Class))
      globals(object).collect do |subname|
        [ name, subname ].join('::')
      end << name
    else
      name
    end
  end.flatten
end