ruby 将选定的整个单词括在括号中

Question

@string = "Sometimes some stupid people say some stupid words"

@string.enclose_in_brackets("some") # => "Sometimes {some} stupid people say {some} stupid words"

enclose_in_brackets 方法应该是什么样子的？请记住，我只想包含整个单词，(我不想“{Some}times {some} stupid....”，“sometimes”这个词应该保持不变

Answer 1

这只是使用正则表达式的字符串替换。您可以使用词边界特殊字符来防止它在另一个词的中间时匹配您的参数。并将您的方法放在 String 类中，以便您可以像示例中那样直接在字符串上调用它。

class String
  def enclose_in_brackets(selection)
    self.gsub(/(\b#{selection}\b)/i, '{\1}')
  end
end

'Sometimes some stupid people say some stupid words'.enclose_in_brackets('some')
# Sometimes {some} stupid people say {some} stupid words.