Ruby（Rails）gsub：将捕获的字符串传递给方法(Ruby (Rails) gsub: pass the captured string into a method)

 我试图匹配一个字符串： 
 
text = "This is a #hastag"
raw(
  h(text).gsub(/(?:\B#)(\w*[A-Z]+\w*)/i, embed_hashtag('\1'))
)

def embed_hashtag('data')
  #... some code to turn the captured hashtag string into a link
  #... return the variable that includes the final string
end
 
 我的问题是，当我在使用gsub调用的embed_hashtag方法中传递'\1'时，它直接传递"\1" ，而不是从我的正则表达式中第一个捕获的组。 有其他选择吗？ 
 
 供参考： 
 
 
 
 我在h包装文本以转义字符串，但后来我将代码嵌入用户输入的文本（即标签），这需要通过原始（因此是raw ）传递。 
 
 
 将“＃”符号与文本分开很重要，这就是为什么我相信我需要捕获组。 
 
 
 如果你有更好的方法来做到这一点，不要犹豫，让我知道，但如果有人有这个问题，我仍然希望能回答这个问题。 
 

I'm trying to match a string as such:
 
text = "This is a #hastag"
raw(
  h(text).gsub(/(?:\B#)(\w*[A-Z]+\w*)/i, embed_hashtag('\1'))
)

def embed_hashtag('data')
  #... some code to turn the captured hashtag string into a link
  #... return the variable that includes the final string
end
 
My problem is that when I pass '\1' in my embed_hashtag method that I call with gsub, it simply passes "\1" literally, rather than the first captured group from my regex. Is there an alternative?
 
FYI:
 
 
 
I'm wrapping text in h to escape strings, but then I'm embedding code into user inputted text (i.e. hashtags) which needs to be passed raw (hence raw).
 
 
It's important to keep the "#" symbol apart from the text, which is why I believe I need the capture group.
 
 
If you have a better way of doing this, don't hesitate to let me know, but I'd still like an answer for the sake of answering the question in case someone else has this question.
 

原文：https://stackoverflow.com/questions/24230877