my_hangman.rb

  class Hangman

  def initialize
    @dictionary = File.open('dictionary.txt').readlines.sample
    play
  end

  def word_length
    @length = @dictionary.length - 1
    @chances = @length + 2
  end

  def board
    @board = "_ " * @length
  end

  def check_guess(letter)
    arr = []
    @dictionary.chars.each_with_index do |el, idx|
      arr << idx if el == letter
    end
    arr.each do |el|
      @board[el] = letter if el == 0
      @board[el*2] = letter
    end
    @board
  end

  def won?
    return true unless @board.include?("_")
    false
  end

  def play
    word_length
    entries = []
    puts "You have #{@chances} chances!"
    puts board
    while @chances > 0
    puts "Guess a letter:"
    get_answer = true
    while get_answer
    answer = gets.chomp.downcase
     if entries.include?(answer)
       puts "You've already used #{answer}, please try a different letter"
     elsif answer.length != 1 || !("a".."z").include?(answer)
       puts "Invalid entry, try again:"
     else
       get_answer = false
     end
     entries << answer
    end
    @chances -=1 unless @dictionary.include?(answer)
    puts check_guess(answer)
    if won?
        puts "Bingo!         Play again?\n y/n?"
        play_again = gets.chomp.downcase
        case play_again
        when "y" then Hangman.new
        when "n" then exit
        end
        break
      end
    if @chances >1
    puts "You have #{@chances} chances left"
    else
    puts "You have #{@chances} chance left"
    end
    end
    puts "GAME OVER!\nThe secret word was #{@dictionary}         Play again?\n y/n?" unless won?
    play_again = gets.chomp.downcase
    case play_again
    when "y" then Hangman.new
    when "n" then exit
    end
  end

  end

  new_game = Hangman.new