Question

我试图用带括号的正则表达式包围一些文本。例如，将所有is替换为(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？（虽然仍然保持找到的字符串的原始案例）

Answer 1

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"

Answer 2

对于您的示例，查找“is”匹配的正则表达式模式是：

\ B [II] [SS] \ B'/ P>

您可能还想使用\ b，单词边界

为了用括号，圆括号或其他东西包围匹配的模式：

gsub（/ \ b [iI] [Ss] \ b /，“（\ 0）”）

基本上，\ 0是前一个匹配，由括号括起来自己替换。

编辑：您可以在此处测试您的正则表达式：ruby regex

如何使用正则表达式括号括起文本？

2 个答案: