Merge pull request #118 from infovore/main

Port of 'Bagels' to Ruby

05 Bagels/ruby/README.md

@@ -1,3 +1,16 @@
+## BAGELS
+
 Original source downloaded [from Vintage Basic](http://www.vintage-basic.net/games.html)
 
-Conversion to [Ruby](https://www.ruby-lang.org/en/)
+Conversion to [Ruby](https://www.ruby-lang.org/en/) by [Tom Armitage](https://github.com/infovore)
+
+## Translator's notes:
+
+This is a highly imperative port. As such, it's very much, in the spirit of David Ahl's original version, and also highly un-Rubyish.
+
+A few decisions I made:
+
+* the main loop is a 'while' loop. Most games are a main loop that runs until it doesn't, and I felt that "while the player wished to keep playing, the game should run" was an appropriate structure.
+* lots of puts and gets; that feels appropriate to the Ahl implementation. No clever cli or curses libraries here.
+* the number in question, and the player's answer, are stored as numbers. They're only converted into arrays for the purpose of `puts_clue_for` - ie, when comparison is need. The original game stored them as arrays, which made sense, but given the computer says "I have a number in mind", I decided to store what was in its 'mind' as a number.
+* the `String#center` method from Ruby 2.5~ sure is handy.

05 Bagels/ruby/bagels.rb

@@ -0,0 +1,117 @@
+# Bagels
+# Number guessing game.
+# Original source unknown but suspected to be
+# Lawrence Hall of Science, U.C. Berkeley
+
+def print_instructions
+  puts
+  puts 'I am thinking of a three-digit number. Try to guess'
+  puts 'my number and i will give you clues as follows:'
+  puts '   PICO   - one digit correct but in the wrong position'
+  puts '   FERMI  - one digit correct and in the right position'
+  puts '   BAGELS - no digits correct'
+end
+
+def generate_target
+  # pick a three digit number with no repeating numbers.
+  # gien that, 102-987 is a reasonable starting point!
+  target = rand(102..987) while target.to_s.split('').uniq.size < 3
+  target
+end
+
+def puts_clue_for(guess_number, target_number)
+  guess_array = guess_number.to_s.split('')
+  target_array = target_number.to_s.split('')
+
+  clues = [].tap do |clue|
+    guess_array.each_with_index do |n, i|
+      if target_array[i] == n
+        clue << 'FERMI'
+      elsif target_array.include?(n)
+        clue << 'PICO'
+      end
+    end
+  end
+
+  # sort clues so that FERMIs come before PICOs, but
+  # you don't know which response responds to which number
+  if clues.length > 0
+    puts clues.sort.join
+  else
+    puts 'BAGELS'
+  end
+end
+
+player_points = 0
+desire_to_play = true
+
+puts 'Bagels'.center(72)
+puts 'Creative Computing  Morristown, New Jersey'.center(72)
+5.times { puts }
+
+puts 'Would you like to the rules? [Y]es or [N]o.'
+instructions_request = gets.chomp.downcase
+
+print_instructions if %w[yes y].include?(instructions_request)
+
+while desire_to_play
+  target = generate_target
+
+  2.times { puts }
+  puts 'OK. I have a number in mind.'
+
+  guess_count = 0
+  guess = 0
+
+  while (guess != target) && guess_count < 20
+    guess_count += 1
+
+    puts "Guess ##{guess_count}:"
+
+    raw_guess = gets.chomp
+
+    ## if the guess isn't numerical, sound confused
+    if raw_guess =~ /[^0-9]/
+      puts 'What?'
+      next
+    end
+
+    ## if the guess is more ore less than three digits, prompt player
+    if raw_guess.length != 3
+      puts 'Try guessing a three digit number'
+      next
+    end
+
+    ## if the guess contains duplicate numbers, give player a clue
+    if raw_guess.split('').uniq.size < 3
+      puts 'Oh, I forgot to tell you: the number I have in mind has no two digits the same.'
+      next
+    end
+
+    guess = raw_guess.to_i
+
+    if guess != target
+      puts_clue_for(guess, target)
+      puts
+    end
+  end
+
+  if guess == target
+    player_points += 1
+
+    puts 'You got it!!!'
+    puts
+  else
+    puts 'Oh well.'
+    puts "That's twenty guesses. My number was #{target_number_array.join('')}."
+  end
+
+  puts
+  puts 'Would you like to play again? [Y]es or [N]o'
+
+  play_again_request = gets.chomp
+  desire_to_play = %w[yes y].include?(play_again_request)
+end
+
+puts "A #{player_points} point bagels buff!!"
+puts 'Hope you had fun. Bye.'