Class: MM::GuessEvaluator

Inherits:
Object
  • Object
show all
Defined in:
lib/games/mastermind/guess_evaluator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#guess ⇒ Object

Returns the value of attribute guess.



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# File 'lib/games/mastermind/guess_evaluator.rb', line 7

def guess
  @guess
end

#result ⇒ Object

Returns the value of attribute result.



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# File 'lib/games/mastermind/guess_evaluator.rb', line 8

def result
  @result
end

#secret_code ⇒ Object

Returns the value of attribute secret_code.



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# File 'lib/games/mastermind/guess_evaluator.rb', line 6

def secret_code
  @secret_code
end

Instance Method Details

#delete_elements_already_matched(set_of_matched_indexes) ⇒ Object 



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# File 'lib/games/mastermind/guess_evaluator.rb', line 40

def delete_elements_already_matched(set_of_matched_indexes)
  secret_code.delete_if.with_index { |_, index| set_of_matched_indexes.include? index }
  guess.delete_if.with_index { |_, index| set_of_matched_indexes.include? index }
end

#evaluate_guess(secret_code, guess) ⇒ Object

returns “XXXX” if perfect guess. returns XXO, for example, if two perfect guesses and one right digit but wrong place



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# File 'lib/games/mastermind/guess_evaluator.rb', line 11

def evaluate_guess(secret_code, guess)
  @secret_code = Marshal.load(Marshal.dump(secret_code))
  @guess = Marshal.load(Marshal.dump(guess))
  #default when game starts is to have empty current_guess array
  if guess.empty?
    return []
  end
  @result = find_result
end

#find_exact_matches ⇒ Object 



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# File 'lib/games/mastermind/guess_evaluator.rb', line 27

def find_exact_matches
  resX = []
  set_of_matched_indexes = Set.new
  guess.each_with_index do |element, index|
    if element == secret_code[index]
      resX.push ("X")
      set_of_matched_indexes.add(index)
    end
  end
  delete_elements_already_matched(set_of_matched_indexes)
  resX
end

#find_partial_matches ⇒ Object 



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# File 'lib/games/mastermind/guess_evaluator.rb', line 45

def find_partial_matches
  resO = []
  return resO if secret_code.empty? || guess.empty?
  secret_code.sort!
  guess.sort!

  secret_code_iterator = Shared::ArrayIterator.new(secret_code)
  guess_iterator = Shared::ArrayIterator.new(guess)

  #get first elements from enums
  code_element = secret_code_iterator.next_item
  guess_element = guess_iterator.next_item


  while true
    if guess_element == code_element
      resO.push("O")
      if secret_code_iterator.has_next? && guess_iterator.has_next?
        code_element = secret_code_iterator.next_item
        guess_element = guess_iterator.next_item
      else
        break
      end
    elsif guess_element > code_element
      if secret_code_iterator.has_next?
        code_element = secret_code_iterator.next_item
      else
        break
      end
    else
      if guess_iterator.has_next?
        guess_element = guess_iterator.next_item
      else
        break
      end
    end
  end
  resO
end

#find_result ⇒ Object 



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# File 'lib/games/mastermind/guess_evaluator.rb', line 21

def find_result
  resX = find_exact_matches
  resO = find_partial_matches
  resX.concat resO
end