example.exs in trackler-1.0.1.1

- old
+ new

@@ -25,18 +25,17 @@
 
   def position(%RobotSimulator{position: pos}), do: pos
   def direction(%RobotSimulator{direction: dir}), do: dir
 
   defp orient(%RobotSimulator{} = robot, direction) when direction in @valid_directions do
-    %RobotSimulator{ robot | direction: direction }
+    %{ robot | direction: direction }
   end
   defp orient({ :error, _ } = error, _), do: error
   defp orient(_, _), do: { :error, "invalid direction" }
 
   defp place(%RobotSimulator{} = robot, { x, y } = position) when is_integer(x) and is_integer(y) do
-    %RobotSimulator{ robot | position: position }
+    %{ robot | position: position }
   end
-  defp place({ :error, _ } = error, _), do: error
   defp place(_, _), do: { :error, "invalid position" }
 
   defp move("R", %RobotSimulator{ direction: direction } = robot), do: robot |> orient(direction |> rotate_right)
   defp move("L", %RobotSimulator{ direction: direction } = robot), do: robot |> orient(direction |> rotate_left)
   defp move("A", %RobotSimulator{ direction: :north, position: { x, y } } = robot), do: robot |> place({ x, y + 1 })