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正则表达式 #3
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元字符
/\.css$/
简写字符集
[a-zA-Z0-9_]
[^\w]
[0-9]
[^\d]
[\t\n\f\r\p{Z}]
[^\s]
断言
标记
常用正则表达式
^\d+$
^-\d+$
^+?[\d\s]{3,}$
^([a-z])*$
^([A-Z])*$
^(?=^.{6,}$)((?=.*[A-Za-z0-9])(?=.*[A-Z])(?=.*[a-z]))^.*$
参考文章传送门:
什么是正则表达式 ?
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