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public:it:regular-expressions [2014/08/04 13:25] – oakfirepublic:it:regular-expressions [2022/04/07 17:40] (当前版本) – oakfire
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 ====== Regular Expressions ====== ====== Regular Expressions ======
 +  * [[https://github.com/ziishaned/learn-regex/blob/master/translations/README-cn.md|Learn regex]]
   * [[https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions|MDN的正则表达式指南]]   * [[https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions|MDN的正则表达式指南]]
   * 在线正则测试:   * 在线正则测试:
行 7: 行 7:
        * [[http://www.debuggex.com/|Debuggex]]        * [[http://www.debuggex.com/|Debuggex]]
        * [[http://regexcrossword.com/|Help to learn regex]]        * [[http://regexcrossword.com/|Help to learn regex]]
 +       * [[http://regexper.com/|Regexper]]
   * 在线编辑正则:   * 在线编辑正则:
 +       * [[https://github.com/Bowen7/regex-vis|Regex-vis]]
 +       * [[https://github.com/geongeorge/i-hate-regex|I hate regex]]
        * [[http://scriptular.com/|Scriptular]]        * [[http://scriptular.com/|Scriptular]]
        * [[http://txt2re.com/|Txt2re]]        * [[http://txt2re.com/|Txt2re]]
        * [[http://www.phpliveregex.com/|Php reg edit]]        * [[http://www.phpliveregex.com/|Php reg edit]]
 +  * duckduckgo.com's answer:<code>
 +Anchors
 +^ Start of string or line
 +\A Start of string
 +$ End of string or line
 +\Z End of string
 +\b Word boundary
 +\B Not word boundary
 +\< Start of word
 +\> End of word
 +Character Classes
 +\c Control character
 +\s Whitespace
 +\S Not Whitespace
 +\d Digit
 +\D Not digit
 +\w Word
 +\W Not Word
 +\x Hexadecimal digit
 +\O Octal Digit
 +POSIX Classes
 +[:upper:] Uppercase letters [A-Z]
 +[:lower:] Lowercase letters [a-z]
 +[:alpha:] All letters [A-Za-z]
 +[:alnum:] Digits and letters [A-Za-z0-9]
 +[:digit:] Digits [0-9]
 +[:xdigit:] Hexadecimal digits [0-9a-f]
 +[:punct:] Punctuation
 +[:blank:] Space and tab [ \t]
 +[:space:] Blank characters [ \t\r\n\v\f]
 +[:cntrl:] Control characters [\x00-\x1F\x7F]
 +[:graph:] Printed characters [\x21-\x7E]
 +[:print:] Printed characters and spaces [\x20-\x7E]
 +[:word:] Digits, letters and underscore [A-Za-z0-9_]
 +Pattern Modifiers
 +//g Global Match (all occurrences)
 +//i Case-insensitive
 +//m Multiple line
 +//s Treat string as single line
 +//x Allow comments and whitespace
 +//e Evaluate replacement
 +//U Ungreedy pattern
 +Escape Sequences
 +\ Escape following character
 +\Q Begin literal sequence
 +\E End literal sequence
 +Quantifiers
 +* 0 or more
 ++ 1 or more
 +? 0 or 1 (optional)
 +{3} Exactly 3
 +{3,} 3 or more
 +{2,5} 2, 3, 4 or 5
 +Groups and Ranges
 +. Any character except newline (\n)
 +(a|b) a or b
 +(...) Group
 +(?:...) Passive (non-capturing) group
 +[abc] Single character (a or b or c)
 +[^abc] Single character (not a or b or c)
 +[a-q] Single character range (a or b ... or q)
 +[A-Z] Single character range (A or B ... or Z)
 +[0-9] Single digit from 0 to 9
 +Assertions
 +?= Lookahead assertion
 +?! Negative lookahead
 +?<= Lookbehind assertion
 +?!= or ?<! Negative lookbehind
 +?> Once-only Subexpression
 +?() Condition [if then]
 +?()| Condition [if then else]
 +?# Comment
 +Special Characters
 +\n New line
 +\r Carriage return
 +\t Tab
 +\v Vertical tab
 +\f Form feed
 +\ooo Octal character ooo
 +\xhh Hex character hh
 +String Replacement
 +$n n-th non-passive group
 +$2 "xyz" in /^(abc(xyz))$/
 +$1 "xyz" in /^(?:abc)(xyz)$/
 +$` Before matched string
 +$' After matched string
 +$+ Last matched string
 +$& Entire matched string
 +</code>
 +
  
  
  • public/it/regular-expressions.1407129950.txt.gz
  • 最后更改: 2014/08/04 13:25
  • 由 oakfire