I am using mustache gem in my ruby on rails app. Given a template, I would like to replace all double mustache in the template with triple mustache, and not replace when it is a triple mustache. There won't be single mustache in the original template, so i don't want to worry about single mustache.
我正在我的ruby on rails应用程序中使用mustache gem。如果有一个模板，我希望将模板中的所有双胡子替换为三重胡子，而不要替换为三重胡子。原来的模板不会有单唇髭，所以我不想担心单唇髭。
Eg:
例如:
temp = "You have just won {{value}} {{{currency}}}!"
should convert to
应该转换为
temp = "You have just won {{{value}}} {{{currency}}}!"
1 个解决方案
#1
3
This could be done via a negative lookahead.
这可以通过一个消极的展望来完成。
\{\{[^}]+\}\}(?!\})
This will match substrings enclosed by 2 mustaches, but not followed by a third.
这将匹配包含2个八字胡的子字符串，但后面没有第三个。
The matches can then be enclosed with extra mustaches.
然后，比赛可以加上额外的小胡子。
temp = "You have just won {{value}} {{{currency}}}!"
temp.gsub!(/\{\{[^}]+\}\}(?!\})/, '{\&}')
puts temp
#1
3
This could be done via a negative lookahead.
这可以通过一个消极的展望来完成。
\{\{[^}]+\}\}(?!\})
This will match substrings enclosed by 2 mustaches, but not followed by a third.
这将匹配包含2个八字胡的子字符串，但后面没有第三个。
The matches can then be enclosed with extra mustaches.
然后，比赛可以加上额外的小胡子。
temp = "You have just won {{value}} {{{currency}}}!"
temp.gsub!(/\{\{[^}]+\}\}(?!\})/, '{\&}')
puts temp