英文字母

小写英文字母组成

大写英文字母

密码强度校验，最少6位，包括至少1个大写字母，1个小写字母，1个数字，1个特殊字符

用户名校验，4到16位（字母，数字，下划线，减号）

ip-v4

ip-v6

16进制颜色

微信号，6至20位，以字母开头，字母，数字，减号，下划线

邮政编码(中国)

中文和数字

不能包含字母

This regex fetches interface ID along with its ip address and description if configured otherwise blank

All float representations that can be consumed by strtod() (string to double function in c) Compatible with flex/bison

This regexp can be used to validate domain names in Golang. While it cannot enforce the 253 character limit (with optional trailing period not included) that can be easily done with a len(domain) <= 253 check. This can be used as-is in other languages, even with RE2 regex engine. Non-capturing groups are used.

https://regex101.com/r/VC5MsA/4

This expr will get the parent folder and file name from a full path eg: c:\folder1\folder2\folder3\file1.txt returns folder3\file1.txt