Say there are two words like: googleweb.us and google.us
比如说有两个词：googleweb.us和google.us
This is one way I worked out to match these in a single regex, but it looks ugly.
这是我在单个正则表达式中匹配这些的一种方法，但它看起来很难看。
/(google|espn|foxtel)\w*[web\.\w+|\.\w+]/
I only want to cover both of the two cases when "web" exists or not. How could the pattern could be improved?
当“web”存在与否时，我只想涵盖这两种情况。怎么可以改善模式？
2 个解决方案
#1
2
This will allow "web" to be optional for just google:
这将允许“web”对于谷歌来说是可选的：
/(google(web)?|espn|foxtel)\.\w+/
This will allow "web" to be optional for any of the domains:
这将允许“web”对任何域都是可选的：
/(google|espn|foxtel)(web)?\.\w+/
#2
1
You need to revise your 'character class'. The material in square brackets is treated as a character class, and isn't what you had in mind.
你需要修改你的“角色类”。方括号中的材料被视为字符类，而不是您的想法。
A regex that would match what you ask about in words ('googleweb.us' and 'google.us') is:
正如你所要求的那样（'googleweb.us'和'google.us'）匹配的正则表达式是：
/^(google)(web)?\.us$/
When you've defined what else you want it to match, people can refine the regex.
当你定义了你想要匹配的其他内容时，人们可以优化正则表达式。
#1
2
This will allow "web" to be optional for just google:
这将允许“web”对于谷歌来说是可选的：
/(google(web)?|espn|foxtel)\.\w+/
This will allow "web" to be optional for any of the domains:
这将允许“web”对任何域都是可选的：
/(google|espn|foxtel)(web)?\.\w+/
#2
1
You need to revise your 'character class'. The material in square brackets is treated as a character class, and isn't what you had in mind.
你需要修改你的“角色类”。方括号中的材料被视为字符类，而不是您的想法。
A regex that would match what you ask about in words ('googleweb.us' and 'google.us') is:
正如你所要求的那样（'googleweb.us'和'google.us'）匹配的正则表达式是：
/^(google)(web)?\.us$/
When you've defined what else you want it to match, people can refine the regex.
当你定义了你想要匹配的其他内容时，人们可以优化正则表达式。