randpath

this is how I see it

def rand_path(args)
  path_index = (rand()*args.size).to_i
  case args[path_index]
  when Array then rand_path(args[path_index])
  when Proc  then args[path_index].call
  else
    puts "Discarded #{args[path_index].class} argument"
  end
end

rand_path [[ lambda{ puts "1a"}, lambda{ puts "1b"} ], lambda{ puts "2"}, lambda{puts "3"}]