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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
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 .
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.
mixed mode: PHP + HTML + JavaScript + CSS, single-mode: PHP, Javascript, CSS, XML; extensible ... Search & replace regex supported via API: No Yes No toolbar button
Regular expression search and replace and find-as-you-type; ... MJCdetroit/monobook.js is a monobook tool that allows many common units to be correctly formatted ...
Replace: The replacement text. The drop-down options contain the last submitted replacements, proceeded by indicators for the used casesensitive and regular expression settings. Selecting a previous replacement also sets the Case sensitive and RegExp check buttons. Use the Tab key to jump between the Find and the Replace fields. Replace next
Full search and replace with regular expressions is supported along with comparisons, histograms, checksum/hash algorithms, and column mode editing. Different character encodings including ASCII , Unicode , and UTF-8 are supported including conversions between encodings.
HTML, CSS, JavaScript, C++: No cost: MIT: BBEdit: ... Regex-based find & replace Encoding conversion Newline conversion Multiple undo/redo Rectangular block selection