# File karel/tk_robot_world.rb, line 24 def initialize (name) super() # puts 'new tk robot world' @name = name @beepers = Hash.new(0) @east_west_walls = Hash.new(0) @north_south_walls = Hash.new(0) @robots = Hash.new(nil) @beepers.extend(MonitorMixin) @@beeper_control = @beepers.new_cond end