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  2. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    A regular expression ... (including zero) of strings from the set described by R. ... but only at the beginning of the string or line.

  3. Help:Searching/Regex - Wikipedia

    en.wikipedia.org/wiki/Help:Searching/Regex

    Regex experts should note that \n does not mean "newline," \d does not mean "digit," and so on. Regex experts should note that ^ does not mean "beginning of text" and $ does not mean "end of text." Searching from the beginning or end of a Wikipedia page is not generally useful.

  4. Template:Regex/sandbox - Wikipedia

    en.wikipedia.org/wiki/Template:Regex/sandbox

    a string of digits 0-9, or; a string of alphanumeric characters a-z, 0-9. a token inside a camelCase word. For transitions from lower to upper case, (or camelCase), and transitions from letter to number: these are two words; only the first transition divides such words, into two; a null space matches non-alphanumerics: game-folks matches gameFolks.

  5. Comparison of regular expression engines - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_regular...

    List of regular expression libraries Name Official website Programming language Software license Used by Boost.Regex [Note 1] Boost C++ Libraries: C++: Boost: Notepad++ >= 6.0.0, EmEditor: Boost.Xpressive Boost C++ Libraries: C++ Boost DEELX RegExLab: C++ Proprietary FREJ [Note 2] Fuzzy Regular Expressions for Java: Java: LGPL GLib/GRegex [Note ...

  6. Wikipedia:AutoWikiBrowser/Regular expression - Wikipedia

    en.wikipedia.org/.../Regular_expression

    A regular expression or regex is a sequence of characters that define a pattern to be searched for in a text. Each occurrence of the pattern may then be automatically replaced with another string, which may include parts of the identified pattern. AutoWikiBrowser uses the .NET flavor of regex. [1]

  7. Perl Compatible Regular Expressions - Wikipedia

    en.wikipedia.org/wiki/Perl_Compatible_Regular...

    Perl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the Perl programming language. Philip Hazel started writing PCRE in summer 1997. [ 3 ]

  8. Leaning toothpick syndrome - Wikipedia

    en.wikipedia.org/wiki/Leaning_toothpick_syndrome

    Sed regular expressions, particularly those using the "s" operator, are much similar to Perl (sed is a predecessor to Perl). The default delimiter is "/", but any delimiter can be used; the default is s / regexp / replacement / , but s : regexp : replacement : is also a valid form.

  9. Kleene star - Wikipedia

    en.wikipedia.org/wiki/Kleene_star

    If is a set of strings, then is defined as the smallest superset of that contains the empty string and is closed under the string concatenation operation. If V {\\displaystyle V} is a set of symbols or characters, then V ∗ {\\displaystyle V^{*}} is the set of all strings over symbols in V {\\displaystyle V} , including the empty string ε ...