A regular expression (shortened as regex or regexp), sometimes referred to as rational expression, is a sequence of characters that specifies a match...

Perl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the...

language theory, a regular language (also called a rational language) is a formal language that can be defined by a regular expression, in the strict sense...

This is a comparison of regular expression engines. Formerly called Regex++. One of fuzzy regular expression engines. Included since version 2.13.0. ICU4J...

something that will return a value Regular expression, a means of matching strings of text in computing Expression marks, in music, notating the musical...

as a regular expression which does not match as parsing expression: [ab]?[bc][cd] is both a valid regular expression and a valid parsing expression. As...

characters. They are defined to match up with the brackets in POSIX regular expressions. Unix globbing is handled by the shell per POSIX tradition. Globbing...

datasets for lines that match a regular expression. Its name comes from the ed command g/re/p (global regular expression search and print), which has the...

regular expression denial of service (ReDoS) is an algorithmic complexity attack that produces a denial-of-service by providing a regular expression and/or...

regular expression into an equivalent nondeterministic finite automaton (NFA). This NFA can be used to match strings against the regular expression....

equations Regular algebra, or Kleene algebra Regular code, an algebraic code with a uniform distribution of distances between codewords Regular expression, a...

0\}} , the paradigmatic non-regular linear language. Regular expression, a compact notation for regular grammars Regular tree grammar, a generalization...

the mathematical formalisms called "finite automaton", "regular grammar", or "regular expression", all of which have the same expressive power. Since the...

syntax. The lexical syntax is usually a regular language, with the grammar rules consisting of regular expressions; they define the set of possible character...

for the structural complexity of regular expressions and regular languages. The star height of a regular expression equals the maximum nesting depth of...

custom-built, denial-of-service resistant regular expression engine. In March 2010, the code of RE2, the regular expression engine used in Google Code Search...

used in the implementation of regular expressions: Thompson's construction is an algorithm for compiling a regular expression to an NFA that can efficiently...

applications of regular expressions, here for pattern matching in the text editor QED. For speed, Thompson implemented regular expression matching by JITing...

compute the derivative of a generalized regular expression. Even though originally studied for regular expressions, the definition applies to arbitrary formal...

common, such as regular expressions and Windows-style paths. (Compare "@-quoting" in C#.) Python has array index and array slicing expressions in lists, denoted...

program, such as a shell interpreter or a regular expression (regex) engine. In POSIX extended regular expressions, there are 14 metacharacters that must...

writing regular expressions (RE, or regexes), and the interpreter contains an engine for matching strings to regular expressions. The regular-expression engine...

associative arrays (that is, arrays indexed by key strings), and regular expressions. While AWK has a limited intended application domain and was especially...

escape / in Perl regular expressions, leading to sequences such as "\/\/"); text becomes difficult to parse through regular expression they require a mechanism...

object-oriented languages such as JavaScript whose patterns are known as regular expressions. In addition SNOBOL4 strings generated during execution can be treated...

transforms a given regular expression into an equivalent nondeterministic finite automaton (NFA). Thus, it forms a bridge between regular expressions and nondeterministic...

Conditional Expressions". Archived from the original on 4 June 2013. Retrieved 11 February 2013. "CUBRID 11 Manual - Regular Expressions Functions and...

("quick editor", 1965–66). It was one of the earliest tools to support regular expressions, and remains in use for text processing, most notably with the substitution...

the Go language. Other notable contributions included his work on regular expressions and early computer text editors QED and ed, the definition of the...

may see use as a delimiter for regular expression operations (e.g. in sed). This is useful when the regular expression contains instances of the more...