Quick attempt at Eric's thing in ruby, without dealing with arrays

tutor.rb

class SpanishTutor
  def initialize(path_to_dictionary)
    @dictionary    = parse_file(path_to_dictionary)
    @num_incorrect = 0
    @num_correct   = 0
    start_repl
  end

  def start_repl
    loop do
      correct = false
      until correct
        word = @dictionary.keys.sample
        puts word
        answer  = gets.chomp
        correct = grade(word, answer)
      end
    end
  end

  def grade(word, answer)
    result = false
    if @dictionary[word] == answer
      result = true
      @num_correct += 1
      puts "Correct!"
    elsif answer == 'q'
      puts "You got #@num_correct correct."
      exit
    else
      @num_incorrect += 1
      puts "Try again!"
    end
    result
  end

  def parse_file(path_to_file)
    dictionary = {}
    File.open(path_to_file, "r").each do |line|
      spanish_word, english_word = line.match(/(\w+) - (\w+)/).captures
      dictionary[spanish_word] = english_word
    end
    dictionary
  end
end

tutor = SpanishTutor.new('./dictionary.txt')