滻ҪʹʽִӦвʽ


$               :ƥַβλá־а m()ַ,^ ƥ \n  \r ǰλá:\d{3}$ ַβ 3 ƥ䡣

()              :ӱʽĿʼͽβ ԱӱʽԱ֮á:A(\d)"A0""A9"ƥ䡣Ա֮á

(?!ģʽ)        ԤС ƥģʽ ƥַ ҵһƥ󣬽ƥı֮ǰʼһƥ ᱣƥԱ֮á1:\b(?!th)\w+\b 벻"th"ͷĵƥ䡣2:ڸģʽ,\b һֱ߽ƥ䡣 ַ"quick",һոƥ䡣 (?!th) "th"ַƥ䡣 "qu"ƥ䡣

(?:ģʽ)        ģʽ ƥ,ƥ;洢ƥԱ֮á "or"ַ (|) ģʽá:industr(?:y|ies)  industry|industries ȡ

(?<!ģʽ)       ͵ӡӣ(?<!E|g)\w{5}ھThe English Is goodƥ䵽Engli

(?<=ģʽ)       һ󿴵Ŀ϶ӡӣ(?<=E)\w{2}ھThe English Is goodƥ䵽ng

(?=ģʽ)        һǰĿ϶ӡӣ\w{2}(?=g|h)ھThe English Is goodƥ䵽En is

(?i)(?-i)     (?i)ıʾִСд(?-i)ıʾִСд.1(?i)abcʾִСдabc2a(?i)b(?-i)cabcaBcƥabCƥ䡣

(?s)            һ,ʾƥַ(з),ӣ(?s).

(ģʽ)          ģʽ ƥ䲢ƥ Դ JScript е exec MethodصԪмƥ Ҫƥַ ( ),ʹ"\(""\)":(Chapter|Section) [1-9] "Chapter 5"ƥ,"Chapter"Ա֮á

*               λƥǰַӱʽЧ {0,}:zo* "z""zoo"ƥ䡣

+               һλƥǰַӱʽЧ {1,}:zo+ "zo""zoo"ƥ,"z"ƥ䡣

.               ƥз \n ֮κεַ Ҫƥ \n ڵַ,ʹ [\s\S] ֮ģʽ:a.c "abc""a1c""a-c"ƥ䡣

/               ʾ JScript еıʽģʽĿʼβ ڵڶ"/"ӵַ־ָΪ:/abc/gi "abc"ƥ JScript ıʽ g(ȫ)־ָģʽƥ,i(ԴСд)־ʹִСд

?               λһƥǰַӱʽЧ {0,1} ? κ޶*+?{n}{n,}  {n,m}֮ʱƥģʽǷ̰ġ̰ģʽƥġٵַ Ĭϵ̰ģʽƥġַܶ1:zo? 롰z͡zoƥ,롰zooƥ䡣2:o+? ֻ롰ooooеĵoƥ, o+ Сoƥ䡣3:do(es)? 롰dodoesеġdoƥ䡣

[]              űʽĿʼͽβ:[1-4] "1""2""3""4"ƥ䡣 [^aAeEiIoOuU] κηԪַƥ䡣

[\u4E00-\u9FA5] :ƥַ

[^a-z]          ַΧ 벻ָΧڵκַƥ䡣:[^a-z] 벻ڷΧ"a""z"ڵκַƥ䡣

[^xyz]          ַ δָκַƥ䡣:[^abc] "plain"е"p""l""i""n"ƥ䡣

[a-z-[g-z]]     ΧʽһΧazڶΧgzһΧȥڶΧʣµķΧafע÷Աʽȼ[a-f]

[a-z]           ַΧ ƥָΧڵκַ:[a-z] "a""z"ΧڵκСдĸַƥ䡣

[xyz]           ַ κһַָƥ䡣:[abc] "plain"е"a"ƥ䡣

\               һַΪַıû˽ת:\n 뻻зƥ䡣 \( "("ƥ䡣 \\ "\"ƥ䡣

\A              ƥıʼλáȼ^

\b              һֱ߽ƥ䣻ոλá:er\b "never"е"er"ƥ,"verb"е"er"ƥ䡣

\B              Ǳ߽ƥ䡣:er\B "verb"е"er"ƥ,"never"е"er"ƥ䡣

\cx             ƥ x ָʾĿַ x ֵ A-Z  a-z Χڡ ,ٶ c ı"c"ַ:\cM  Ctrl+M һسƥ䡣

\d              ַƥ䡣Ч [0-9]:ַ"12 345",\d{2} "12""34"ƥ䡣\d "1""2""3""4""5"ƥ䡣

\D              ַƥ䡣Ч [^0-9]:\D+ "abc123 def"е"abc""def"ƥ䡣

\f              ƥ任ҳȼ\x0c  \cL

\n              ƥ任зȼ\x0a  \cJ

\r              ƥسȼ\x0d  \cM

\s              ƥκοհַ аոƱͻҳȼ\[ \f\n\r\t\v]

\S              ƥκηǿհַȼ[^ \f\n\r\t\v]

\t              ƥTabַȼ\x09  \cI

\un             ƥ n, n λʮʾ Unicode ַ:\u00A9 Ȩ (?) ƥ䡣

\v              ƥ䴹ֱƱȼ\x0b  \cK

\w              ַƥ䣺A-Za-z0-9 »ߡЧ [A-Za-z0-9_]:ַ"The quick brown fox"У\w+ "The""quick""brown""fox"ƥ䡣

\W               A-Za-z0-9 »ַƥ䡣Ч [^A-Za-z0-9_]ַ"The quick brown fox",\W+ ""пոƥ䡣

\Z\z          ƥıĽλáȼ$

{}              ޶ʽĿʼͽβ:a{2,3} "aa""aaa"ƥ䡣

{n,}            ƥ n Ρ n ǷǸ*{0,};+{1,}ȡ:o{2,} "Bob"е"o"ƥ,"foooood"е"o"ƥ䡣

{n,m}           ƥ n , m Ρ n  m ǷǸ, n <= m ź֮䲻пո

{n}             ƥ n Ρ n ǷǸ:o{2} "Bob"е"o"ƥ,"food"е"o"ƥ䡣

|               ָʾ֮ѡ:z|food "z""food"ƥ䡣 (z|f)ood "zood""food"ƥ䡣
