5.1 匹配rgb颜色
#00
#ffffff
#ffaaff
#00hh80
#aabbcc
#000000
#ffffffff
匹配字符串:
#[a-fA-F0-9]{6}\b
其中\b是单词字符的边界，用来去掉最后一个#ffffffff
5.2 匹配IPV4
123
255.255.255.0
192.168.0.1
0.0.0.0
256.1.1.1
This is a string.
123.123.0
匹配字符串:
复杂还没搞懂
#00
#ffffff
#ffaaff
#00hh80
#aabbcc
#000000
#ffffffff
匹配字符串:
#[a-fA-F0-9]{6}\b
其中\b是单词字符的边界，用来去掉最后一个#ffffffff
123
255.255.255.0
192.168.0.1
0.0.0.0
256.1.1.1
This is a string.
123.123.0
匹配字符串:
复杂还没搞懂