Data commit

Task/Langtons-ant/CoffeeScript/langtons-ant-1.coffee

@@ -0,0 +1,79 @@
+class Ant
+  constructor: (@world) ->
+    @location = [0, 0]
+    @direction = 'E'
+
+  move: =>
+    [x, y] = @location
+    if @world.is_set x, y
+      @world.unset x, y
+      @direction = Directions.left @direction
+    else
+      @world.set x, y
+      @direction = Directions.right @direction
+    @location = Directions.forward(x, y, @direction)
+
+# Model a theoretically infinite 2D world with a hash, allowing squares
+# to be black or white (independent of any ants.)
+class BlackWhiteWorld
+  constructor: ->
+    @bits = {}
+
+  set: (x, y) ->
+    @bits["#{x},#{y}"] = true
+
+  unset: (x, y) ->
+    delete @bits["#{x},#{y}"]
+
+  is_set: (x, y) ->
+    @bits["#{x},#{y}"]
+
+  draw: ->
+    # Most of this code just involves finding the extent of the world.
+    # Always include the origin, even if it's not set.
+    @min_x = @max_x = @min_y = @max_y = 0
+    for key of @bits
+      [xx, yy] = (coord for coord in key.split ',')
+      x = parseInt xx
+      y = parseInt yy
+      @min_x = x if x < @min_x
+      @max_x = x if x > @max_x
+      @min_y = y if y < @min_y
+      @max_y = y if y > @max_y
+    console.log "top left: #{@min_x}, #{@max_y}, bottom right: #{@max_x}, #{@min_y}"
+    for y in [@max_y..@min_y] by -1
+      s = ''
+      for x in [@min_x..@max_x]
+        if @bits["#{x},#{y}"]
+          s += '#'
+        else
+          s += '_'
+      console.log s
+
+# Simple code for directions, independent of ants.
+Directions =
+  left: (dir) ->
+    return 'W' if dir == 'N'
+    return 'S' if dir == 'W'
+    return 'E' if dir == 'S'
+    'N'
+
+  right: (dir) ->
+    return 'E' if dir == 'N'
+    return 'S' if dir == 'E'
+    return 'W' if dir == 'S'
+    'N'
+
+  forward: (x, y, dir) ->
+    return [x, y+1] if dir == 'N'
+    return [x, y-1] if dir == 'S'
+    return [x+1, y] if dir == 'E'
+    return [x-1, y] if dir == 'W'
+
+
+world = new BlackWhiteWorld()
+ant = new Ant(world)
+for i in [1..11500]
+  ant.move()
+console.log "Ant is at #{ant.location}, direction #{ant.direction}"
+world.draw()

Task/Langtons-ant/CoffeeScript/langtons-ant-2.coffee

@@ -0,0 +1,80 @@
+> coffee langstons_ant.coffee
+Ant is at -24,46, direction W
+top left: -25, 47, bottom right: 22, -29
+_##__##_________________________________________
+##_#####________________________________________
+#____##_#_______________________________________
+____#_#_##______________________________________
+_####_###_#_____________________________________
+_#####_#__##____________________________________
+__#___##_##_#___________________________________
+___###___#__##__________________________________
+____#___##_##_#_________________________________
+_____###___#__##________________________________
+______#___##_##_#_______________________________
+_______###___#__##______________________________
+________#___##_##_#_____________________________
+_________###___#__##____________________________
+__________#___##_##_#___________________________
+___________###___#__##__________________________
+____________#___##_##_#_________________________
+_____________###___#__##________________________
+______________#___##_##_#_______________________
+_______________###___#__##______________________
+________________#___##_##_#_____________________
+_________________###___#__##____________________
+__________________#___##_##_#___________________
+___________________###___#__##__________________
+____________________#___##_##_#_________________
+_____________________###___#__##________________
+______________________#___##_##_#_______________
+_______________________###___#__##______________
+________________________#___##_##_#__##_________
+_________________________###___#__##__##________
+__________________________#___##_##__##___#_____
+____________________####___###___#___#__###_____
+___________________#____#___#___##_####___#_____
+__________________###____#___#_#______#_##_#____
+__________________###____#_##_____#_##__#_##____
+___________________#____#___##_#_#_____##_______
+___________________#_#______#_#####__#___#______
+__________________#___#####__________##_######__
+__________________###__##__#_##_#_#_#___##_#_##_
+________________##__#_#######_#___#__###____##_#
+_______________#__#__######_##___#__#_##___#___#
+______________#____#_#_##_#__######_#######___#_
+______________#_####_##_#_####____##__##_#_##_#_
+_______________#____####___#__#_######_##____###
+__________________#___#_##_#_###_#__##__##___###
+_____________________#######____#__##_##_#_____#
+_____________####__##_##__####_##_##_##__#_____#
+____________#____#_#___###_##_###____#_####____#
+___________###_______###_#_#_#####____#_#______#
+___________#_#___###_####_##_#___##_###_##_____#
+_________________##_##__####____####_#_#_#_____#
+____________#____#__##___###__###_____###______#
+____________##___##_###_####__#______###___##__#
+____________##_#_####_____#___#__#_##_###_##___#
+___________####_##___##_####__#_#__#__#__###___#
+___________#_##_###__#_#_##_#_#_____#_#_____#_#_
+_______________#_#__#____##_##__#_#__###_##_____
+_______________##_#____#__#####_#____#____#__#_#
+______________#_##_#__#____##_##_#__###______###
+____________#_#___#__#__#__#__###___##__##____#_
+___________###_#_#####_######_###_#######_#_##__
+___________#_#_#____#####___##__#####_#####_____
+_____________#__##___#______#__#_##__###_###____
+__________####___#####_#########___#_#__________
+_____##____#__#_____###_#_#___#_###__###________
+____#__#__####_##___###_##___###_##_____##______
+___###____#_##_#_#####___#____#__#__##_###______
+___#_#####_#_#___##__##_____#____#___#__#_______
+_______######_####__##_#___#__##__#_#_##________
+_____##______#_###_##__####___#___###___________
+______#__#_#####__#___#_##___#__#__#____________
+______##_###_#######_____#_____#_##_____________
+_____#_#__##_##______#___##____#________________
+____#__#_####________###__##__#_________________
+____#_##_###____________##__##__________________
+_____##_________________________________________
+______##________________________________________