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A regular expression (shortened as regex or regexp ), [1] sometimes referred to as rational expression, [2] [3] is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation.
List of regular expression libraries. FPGA accelerated >100 Gbit/s regex engine for cybersecurity, financial, e-commerce industries. hardware-accelerated search acceleration using RegEx available for ASIC, FPGA and cloud. Enables massively parallel content processing at ultra-high speeds. ^ Formerly called Regex++.
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A metacharacter is a character that has a special meaning to a computer program, such as a shell interpreter or a regular expression (regex) engine.. In POSIX extended regular expressions, there are 14 metacharacters that must be escaped (preceded by a backslash (\)) in order to drop their special meaning and be treated literally inside an expression: opening and closing square brackets ([and ...
Open the wikitext, and enter a { { regex }} or { { tlusage }}. Show preview, and activate the search link. On the search results page, note the bold text in each match. Go back in your browser. Modify the regexp, and cycle until done. (Or don't go back, you may want to modify the query at the search box.)
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 ...
^txt2regex$ is a regular expression wizard that leads the user through the construction of a regular ... Lisp, MySQL, OpenOffice.org, Perl, PHP, PostgreSQL ...
Pages in category "Regular expressions". The following 13 pages are in this category, out of 13 total. This list may not reflect recent changes . Regular expression.