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The general problem of matching any number of backreferences is NP-complete, and the execution time for known algorithms grows exponentially by the number of backreference groups used. [45] However, many tools, libraries, and engines that provide such constructions still use the term regular expression for their patterns.
A string in JavaScript is a sequence of characters. In JavaScript, strings can be created directly (as literals) by placing the series of characters between double (") or single (') quotes. Such strings must be written on a single line, but may include escaped newline characters (such as \n).
A regex search scans the text of each page on Wikipedia in real time, character by character, to find pages that match a specific sequence or pattern of characters. Unlike keyword searching, regex searching is by default case-sensitive, does not ignore punctuation, and operates directly on the page source (MediaWiki markup) rather than on the ...
A regexp can accommodate for the variations found in the wikitext allowed by the permissions of wikilinks: 1) the metacharacter * allows for "zero or more" space characters before and after the title, and 2) the [character class] at the beginning allows for the relaxed capitalization of the first character in any pagename, and 3) the character ...
Regular Expression Flavor Comparison – Detailed comparison of the most popular regular expression flavors; Regexp Syntax Summary; Online Regular Expression Testing – with support for Java, JavaScript, .Net, PHP, Python and Ruby; Implementing Regular Expressions – series of articles by Russ Cox, author of RE2; Regular Expression Engines
number of characters and number of bytes, respectively COBOL: string length string: a decimal string giving the number of characters Tcl: ≢ string: APL: string.len() Number of bytes Rust [30] string.chars().count() Number of Unicode code points Rust [31]
The investigation found evidence that Snyder withheld revenue owed to the league and created a toxic workplace culture. 3. Washington Commanders. Scott Taetsch/Getty Images. Fine: $10 million.
matches any number of any characters including none Law* Law, Laws, or Lawyer: GrokLaw, La, or aw *Law* Law, GrokLaw, or Lawyer. La, or aw? matches any single character ?at: Cat, cat, Bat or bat: at [abc] matches one character given in the bracket [CB]at: Cat or Bat: cat, bat or CBat [a-z] matches one character from the (locale-dependent) range ...