此网址是否正确的gsub正则表达式？

Question

Say I have a string representing a URL:

http://www.mysite.com/somepage.aspx?id=33

..I'd like to escape the forward slashes and the question mark:

http:\/\/www.mysite.com\/somepage.aspx\?id=33

How can I do this via gsub? I've been playing with some regular expressions in there but haven't hit on the winning formula yet.

Answer 1

I suggest you use

url = url.gsub(/(?=[\/?])/, '\\')

As shown here

url = 'http://www.mysite.com/somepage.aspx?id=33'
url = url.gsub(/(?=[\/?])/, '\\')
puts url

output

http:\/\/www.mysite.com\/somepage.aspx\?id=33

Answer 2

这个result = searchText.gsub(/(\\/|\\?)/, "\\\\\\\\$1")如何result = searchText.gsub(/(\\/|\\?)/, "\\\\\\\\$1")

Answer 3

我建议使用一个块使其更具可读性：

url.gsub(/[\/?]/) { |c| "\\#{c}" }