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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
Database search with regular expressions support Indexed search Search folders [Note 2] IMAP ticker tray icon tooltip sound Search IDLE Alpine: mbox, mbx, MIX, maildir (with patches), MMDF, tenex, mtx, MH, mx, news, phile ? Yes Partial ? ? ? Yes Yes No ? No Yes Yes Yes No Becky! Internet Mail: mbox? ? No Yes ? Yes Yes ? ? ? Yes ? Yes Yes Yes ...
String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).. Most programming languages that have a string datatype will have some string functions although there may be other low-level ways within each language to handle strings directly.
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 .
During periods of increased network threats, the US Department of Defense has converted user's incoming HTML email to text email. [19] The multipart type is intended to show the same content in different ways, but this is sometimes abused; some email spam takes advantage of the format to trick spam filters into believing that the message is ...
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A regular expression denial of service (ReDoS) [1] is an algorithmic complexity attack that produces a denial-of-service by providing a regular expression and/or an input that takes a long time to evaluate.
TRE is an open-source library for pattern matching in text, [2] which works like a regular expression engine with the ability to do approximate string matching. [3] It was developed by Ville Laurikari [1] and is distributed under a 2-clause BSD-like license.