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 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 grou...

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

兼容ios

Can be used to find all of the verbs in a golang format string. It will correctly extract verbs that would otherwise be specified by fmt.Sprintf, including their flags, width and precision. You can test it out on the fmt documentation, here: https://golang.org/pkg/fmt/