class Hash
  def method_missing( msg, *args )
    super unless args.empty?
    if has_key?(msg)
      [msg]
    elsif has_key?(msg.to_s)
      [msg.to_s]
    else
      nil
    end
  end
end

hash = {
  :cats => "awesome",
  "dogs" => "okay I guess?"
}

puts hash.cats
puts hash.dogs
puts hash.notakey