# File karel/robot_world.rb, line 215
   def show_world_with_robots(startStreet=1, startAvenue=1, streetsTowardNorth=10, avenuesTowardEast=10)
        display = get_display(startStreet, startAvenue, streetsTowardNorth, avenuesTowardEast)
        xBound = 2 * streetsTowardNorth + 1
        yBound = 2 * avenuesTowardEast + 1
        @Robots.keys().each do |robot|
            value = @Robots[robot]
            x, y, direction = value[0], value[1], value[2]
            x = 2 * (x - startStreet) + 1
            y = 2 * (y - startAvenue)
            displayCharacter = {Robota::NORTH => ' ^ ', Robota::WEST => ' < ', Robota::SOUTH => ' v ', Robota::EAST => ' > '}
            cell = displayCharacter[direction]
            display[x][y] = cell if visible(x, y, xBound, yBound)    
        end
        dump_display(display, startStreet, startAvenue, streetsTowardNorth, avenuesTowardEast)
        nil
    end