Chris Pine学会编程Ruby CH9:心理测试程序

Question

所以我跟着做了心理测试墨西哥卷饼，玉米饼，wets_bed程序在克里斯·派恩...是的，我改成了"Escape: the Pina Colada song“的歌词，但除此之外，保持不变。

然而，它在第一个“请求”时就卡住了。。。帮助?

我不想大刀阔斧地改变这一点，只是想找出程序挂起的地方。

# Nice little questionnaire 

def ask question
  good_answer = false
  while (not good_answer)
    puts question
    reply = gets.chomp.downcase

    if (reply == 'yes' or reply == 'no' )
      good_answer == true
      if reply == 'yes'
        answer = true
      else
        answer = false
      end
    else 
      puts 'Please answer "yes" or "no".'
    end
  end

  answer # This is what we return (true or false)
end

puts 'Hello, and thank you for smoking.'

puts

ask 'Do you like pina-coladas?'
ask 'Do you like getting caught in the rain?'
risky_business = ask 'Do you know what your sig other likes?'
ask 'Are you into yoga?'
ask 'Do you have half a brain?'
puts 'Just a few more questions.'
ask 'Do like the feel of the ocean?'
ask 'Are you into champagne?'

puts
puts 'DEBRIEFING'
puts 'Thank\'s for all the fish'
puts
puts risky_business

就这样。我想知道这是否可能是Ruby版本的问题？

谢谢!

Answer 1

这行有问题吗？good_answer == true

难道不应该是good_answer = true吗？

Answer 2

如果你打开了警告，Ruby本身就会告诉你good_answer == true行没有意义。

您可以在代码中使用$VERBOSE = true打开警告，或者让unix变量RUBYOPT包含-w。

Answer 3

顺便说一句，我会像这样重写ask函数，使其更符合Ruby的方式：

def ask(question)
  puts question

  while reply = gets.chomp.downcase
    if %w( yes no ).include?(reply)
      answer = if reply == 'yes' then true else false end
      break
    else
      puts 'Please answer "yes" or "no".'
    end
  end

  answer
end