Sha256: 2da799caf3b31e4a7c63d48319000c8276991e7962554b1ca2e60f6e10337966
Contents?: true
Size: 1.16 KB
Versions: 396
Compression:
Stored size: 1.16 KB
Contents
class Simulator
def instructions(text)
text.split('').map { |char| command(char) }
end
def place(robot, position)
robot.at(position[:x], position[:y])
robot.orient(position[:direction])
end
def evaluate(robot, text)
instructions(text).each do |command|
robot.send(command)
end
end
private
def command(char)
{
'R' => :turn_right,
'L' => :turn_left,
'A' => :advance
}[char]
end
end
class Robot
attr_accessor :x, :y, :bearing
def at(x, y)
self.x = x
self.y = y
end
def coordinates
[x, y]
end
def orient(direction)
fail ArgumentError unless cardinal_directions.include?(direction)
self.bearing = direction
end
def advance
if bearing == :north
self.y += 1
elsif bearing == :south
self.y -= 1
elsif bearing == :west
self.x -= 1
else
self.x += 1
end
end
def turn_right
turn(:+)
end
def turn_left
turn(:-)
end
private
def turn(sign)
i = cardinal_directions.index(bearing)
self.bearing = cardinal_directions[i.send(sign, 1) % 4]
end
def cardinal_directions
[:north, :east, :south, :west]
end
end
Version data entries
396 entries across 396 versions & 1 rubygems