Objects!

instruction_reader_demo.rb

filename = "test_cases.txt"

instructions = InstructionReader.new(filename)

# Returns the number of instructions, or how many rovers are given directions
instructions.count
#=> 2

instructions[0].initial_coordinates
#=> [1,2]

instructions[0].initial_direction
#=> "N"

instructions[0].commands
#=> "LMLMLMLMM"

rover = Rover.new(instructions[0])

rover.initial_coordinates
#=> [1,2]

rover.initial_direction
#=> "N"

rover.final_coordinates
#=> [1,3]

rover.final_direction
#=> "N"

# And the same for the next rover.

rover_demo.rb

class Rover
  def initialize(instructions)
    @instructions = instructions
    @commands = @instructions.commands.split('') #=> ['M','L','M','M']
  end

  def initial_coordinates
    @instructions.initial_coordinates
  end

  def parse_command
    command = @commands.shift #=> 'M'
    if command == # Do some shit here...
      # Do some more shit here
    end
  end
end