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crazy coder

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正则表达式保留字的英文

^ (carat)
. (period)
[ (left bracket}
$ (dollar sign)
( (left parenthesis)
) (right parenthesis)
| (pipe)
* (asterisk)
+ (plus symbol)
? (question mark)
{ (left curly bracket, or left brace)
\ backslash

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