Match One of Many Characters (匹配多个字符中的一个)
2014-03-27 09:57
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1. 需求及方法
1) Calendar with misspellings
c[ae]l[ae]nd[ae]r
2) Hexadecimal character
[a-fA-F0-9]
3) Non-hexadecimal character
[^a-fA-F0-9]
2. 小结
1). Shorthand character
\d matches a single digit
\D matches any character that is not a digit
\w matches a single word character
\W matches a character that is not part of such a propellerhead word
\s matches any whitespace character (including spaces, tabs, line breaks)
\S matches any character not matched by <\s>
2). Case insensitivity
(?i)
eg. (?i)[A-F0-9]
1) Calendar with misspellings
c[ae]l[ae]nd[ae]r
2) Hexadecimal character
[a-fA-F0-9]
3) Non-hexadecimal character
[^a-fA-F0-9]
2. 小结
1). Shorthand character
\d matches a single digit
\D matches any character that is not a digit
\w matches a single word character
\W matches a character that is not part of such a propellerhead word
\s matches any whitespace character (including spaces, tabs, line breaks)
\S matches any character not matched by <\s>
2). Case insensitivity
(?i)
eg. (?i)[A-F0-9]
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