Ruby 从散列随机化键值对

我正在构建一个简单的词汇测验，为用户提供一个预先确定的哈希值，并将用户的响应作为输入。如果用户的输入与值的对应键匹配，则程序将移动到下一个值，并重复此过程，直到哈希中的所有键-值对都已计算完毕

在其当前状态下，测验将按照从头到尾的顺序，逐个提示用户散列中的值

但是，为了使测验更加困难，我希望测验提供散列中的随机值，而不是以特定顺序

简单英语…我如何让vocab测验从其库中随机给出定义，而不是每次都以相同的顺序打印相同的定义

我的代码如下。非常感谢大家的帮助

vocab_words = {
  "class" => "Tell Ruby to make a new type of thing",
  "object" => "Two meanings: The most basic type of thing, and any instance of some thing",
  "instance" => "What you get when you tell Ruby to create a class",
  "def" => "How you define a function inside a class"
}

vocab_words.each do |word, definition|
  print vocab_words[word] + ": "
  answer = gets.to_s.chomp.downcase

    while answer != "%s" %word
      if answer == "help"
        print "The answer is \"%s.\" Type it here: " %word
        answer = gets.to_s.chomp.downcase
      else
        print "Nope. Try again: "
        answer = gets.to_s.chomp.downcase
      end
    end
  end

---

使用：

random\u keys=vocab\u words.keys.shuffle

如下：

vocab_words = {
  "class" => "Tell Ruby to make a new type of thing",
  "object" => "Two meanings: The most basic type of thing, and any instance of some thing",
  "instance" => "What you get when you tell Ruby to create a class",
  "def" => "How you define a function inside a class"
}

random_keys = vocab_words.keys.shuffle
random_keys.each do |word|
  print vocab_words[word] + ": "
  answer = gets.to_s.chomp.downcase

  if answer == "help"
    print "The answer is \"%s.\" Type it here: " %word
    answer = gets.to_s.chomp.downcase
  else
    while answer != "%s" %word
      print "Nope. Try again: "
      answer = gets.to_s.chomp.downcase
    end
  end
end

---

非常感谢！使用了你的建议，效果很好。谢谢你的帮助。