我有这个正则表达式:
^[a-zA-Z0-9]
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我试图选择除数字或字母之外的任何字符,但是在测试时,仅第一个字符被匹配。
当我使用
[a-zA-Z0-9]
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匹配项正确是数字和字母。我需要取消它,但^不能正常工作。
小智 6
以下是正则表达式的快速摘要,以及如何使用以下命令将查询集分组在一起。在您的情况下,将其放置在^内部[a-zA-Z0-9]即可达到所需的效果。
. Single character match except newline
"." Anything in quotations marks literally
A* Zero or more occurrences of A
A+ One or more occurrences of A
A? Zero or one occurrence of A
A/B Match A only if followed by B
() series of regexps grouped together
[] Match any character in brackets
[^] Do not match any character in brackets
[-] Define range of characters to match
^ Match beginning of new line
$ Match end of a line
{} Cardinality of pattern match set
\ Escapes meta-characters
| Disjunctive matches, or operation match
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