JavaScript正则表达式 - 检查仅数字匹配的数量

Question

感谢另一位出色的StackOverflow用户,我有这个正则表达式

/(?:-\d+)*/g

我想要它匹配的东西

133-134-454-58819860
12-13-876-1234346

每个块(-s之间的数字)可以是任何长度但它肯定只是数字而且只有4个块.

但目前它匹配像-2008这样的东西

我真的很擅长正则表达式而我正在努力,请帮助.如果有帮助,我会使用JavaScript.

Answer 1

/(?:-\d+)*/g

分解为:

/    about to begin a regex

(    the following is a group

?:   but don't bother storing what this group finds as its own result

-    it must have a dash

\d   followed by digit(s)...

+    at least one digit, perhaps more

)    Im done with the group

*    But get me as many groups like that as you could

/    done with the regex

所以它会找到像这样的所有组-0000但不喜欢这个-000-000

在撰写本文时,其他更快的用户发布了他们自己的正则表达式.但我仍然发布,所以你遵循逻辑.