如何使用正则表达式用括号括起文本? [英] How to surround text with brackets using regex?

问题描述

我一直试图用括号括起通过正则表达式找到的一些文本.例如，将所有 is 替换为 (is) :

I'm stuck trying to surround some text found via regex with brackets. For example replacing all is with (is) :

Input is      : This is a long sentence that IS written.
Desired output: This (is) a long sentence that (IS) written.

我该怎么做?(同时仍然保持找到的字符串的原始大小写)

How can I do this? (While still maintaining the original case-ness of the found strings)

推荐答案

irb(main):001:0> s = 'This is a long sentence that IS written.'
=> "This is a long sentence that IS written."
irb(main):002:0> s.gsub(/\bis\b/i, '(\0)')
=> "This (is) a long sentence that (IS) written"
irb(main):003:0> s
=> "This is a long sentence that IS written"
irb(main):004:0> s.gsub!(/\bis\b/i, '(\0)')
=> "This (is) a long sentence that (IS) written"
irb(main):005:0> s
=> "This (is) a long sentence that (IS) written"

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