Ruby 打破循环的麻烦

Question

好吧，我有金鱼般的编程天赋，所以我需要一些帮助。我有以下代码(请原谅我糟糕的幽默感):

puts 'Do you have a middle name?'
answer=gets.chomp.downcase
 while true 
 if answer != ('yes' || 'no')
  puts 'Yes or no answers only, dumbass.'
  puts 'So I\'ll ask again. Do you have a middle name?'
  answer=gets.chomp.downcase
elsif answer == ('yes' || 'no')
if answer == 'yes'
  puts 'Cool. What is it?'
  middlename=gets.chomp
  puts middlename +'? That\'s dumb.'
  break
if answer == 'no'
  puts 'I guess you aren\'t cool enough.'
  break
end
end
end
end
puts 'Well, smell ya later.'

它基本上工作正常，但我有一个问题:选择 no 选项。我不知道如何让它发挥作用。它会很好地循环，并且选择 yes 选项有效。

基本上，我的问题是:如何创建具有两个中断选项的循环？

Answer 1

对于这样的事情，你应该使用 case/when，这是一个 Ruby switch 语句，因为所有这些 if/end block 会很快变得困惑。

另请阅读本指南: https://github.com/bbatsov/ruby-style-guide它将教您如何正确格式化您的 ruby​​ 代码。

puts 'Do you have a middle name?'
answer=gets.chomp.downcase

case answer
when 'yes' 
  puts 'Cool. What is it?'
  middlename=gets.chomp
  puts middlename +'? That\'s dumb.'
when 'no'
  puts 'I guess you aren\'t cool enough.'
else  
  puts 'Yes or no answers only, dumbass.'
  puts 'So I\'ll ask again. Do you have a middle name?'
  answer=gets.chomp.downcase
end

puts 'Well, smell ya later.'

如果您总是希望它在他们不回答yes 或no 时循环。您可以通过将代码块包装在 loop 中来实现，如下所示:

puts 'Do you have a middle name?'
answer=gets.chomp.downcase

loop do
  case answer
  when 'yes' 
    puts 'Cool. What is it?'
    middlename=gets.chomp
    puts middlename +'? That\'s dumb.'
    break
  when 'no'
    puts 'I guess you aren\'t cool enough.'
    break
  else  
    puts 'Yes or no answers only, dumbass.'
    puts 'So I\'ll ask again. Do you have a middle name?'
    answer=gets.chomp.downcase
  end
end

puts 'Well, smell ya later.'

查看此答案:How to write a switch statement in Ruby