All languages combined word senses marked with topical category "Regular expressions"

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Total 57 word senses

• Kleene operator (Noun) [English] Synonym of Kleene star
• Kleene plus (Noun) [English] The plus symbol, +, used as an operator to concatenate one or more strings from a given set, widely used in regular expressions.
• Kleene star (Noun) [English] The asterisk, *, used as an operator to concatenate zero or more strings from a given set, widely used in regular expressions.
• Kleenen tähti (Noun) [Finnish] Kleene star
• PCRE (Noun) [English] Initialism of Perl-compatible regular expressions.
• ReDoS (Noun) [English] Abbreviation of regular expression denial of service: the use of a maliciously constructed regular expression that takes a very long time to evaluate
• alilauseke (Noun) [Finnish] subpattern
• alternation (Noun) [English] A construct in a regular expression that can match any of several specified subexpressions.
• backreference (Noun) [English] An item in a regular expression equivalent to the text matched by an earlier pattern in the expression.
• backreference (Verb) [English] To access (the text matched by an earlier pattern in a regular expression).
• capturing group (Noun) [English] A grouping in a regular expression that stores the value it matches.
• catastrophic backtracking (Noun) [English] An excessively large amount of backtracking that occurs with certain regular expressions, due to an exponentially large number of possible matching paths to check.
• character class (Noun) [English] A set of related text characters, such as all alphanumerics or all whitespace.
• complemented class (Noun) [English] Characters which are excluded in a pattern.
• greedy (Adjective) [English] Tending to match as much text as possible.
• grep (Proper name) [English] A program which selects lines in a file which match a given pattern.
• grep (Verb) [English] To use a program such as grep to search in a file.
• grep (Verb) [English] To search anything (perhaps a paper document by eye).
• lookahead (Noun) [English] The analysis of the subsequent characters before the regular expression is matched.
• lookaround (Noun) [English] Collective term for lookahead and lookbehind.
• lookbehind (Noun) [English] The analysis of the preceding characters before the regular expression is matched.
• merkkiryhmä (Noun) [Finnish] character class
• metacharacter (Noun) [English] A character used to signify something other than its literal form, such as the asterisk when used as a wildcard.
• negative lookahead (Noun) [English] The analysis of the subsequent characters absence before the regular expression is matched (symbol: ?!).
• negative lookaround (Noun) [English] The analysis of the characters' absence before the regular expression is matched.
• negative lookbehind (Noun) [English] The analysis of the preceding characters absence before the regular expression is matched (symbol: ?<!).
• non-capturing group (Noun) [English] A grouping in a regular expression that doesn't store the value it matches (symbol: ?:).
• nongreedy (Adjective) [English] Not greedy.
• positive lookahead (Noun) [English] The analysis of the subsequent characters presence before the regular expression is matched (symbol: ?=).
• positive lookaround (Noun) [English] The analysis of the characters presence before the regular expression is matched.
• positive lookbehind (Noun) [English] The analysis of the preceding characters' presence before the regular expression is matched (symbol: ?<=).
• regex (Noun) [English] Clipping of regular expression.
• regex golf (Noun) [English] A recreational computer programming competition in which participants attempt to devise the shortest possible regular expression that will match a given set of text strings.
• regexp (Noun) [English] Alternative form of regex
• regluleg segð (Noun) [Icelandic] regular expression
• regular expression (Noun) [English] A concise description of a regular formal language with notations for concatenation, alternation, and iteration (repetition) of subexpressions.
• reluctant (Adjective) [English] Tending to match as little text as possible.
• star height (Noun) [English] A measure of the structural complexity of a regular expression, equal to the maximum nesting depth of stars in the expression.
• subpattern (Noun) [English] A pattern that is contained in another, larger pattern.
• säännöllinen lauseke (Noun) [Finnish] regular expression
• takaisinviittaus (Noun) [Finnish] backreference
• weird matching (Noun) [English] A type of matching where the newline character matches newlines but the wildcard character also does.
• wildcard (Noun) [English] A character that takes the place of any other character or string that is not known or specified.
• wildcard (Noun) [English] An element, often deliberately concealed, which is withheld for contingency.
• wildcard (Noun) [English] Alternative form of wild card.
• wildcard (Verb) [English] To replace or supplement with a wildcard character to allow matching against a range of possible values.
• 正規表現 (Noun) [Japanese] regular expression
• ( ) (Symbol) [Translingual] Defines a marked subexpression, to be matched using the backslash (\1, \2, etc.)
• * (Symbol) [Translingual] Used as a wildcard to detect zero or more occurrences of the preceding element.
• + (Symbol) [Translingual] Detects one or more occurrences of the preceding element.
• ? (Symbol) [Translingual] Detects zero or one occurrences of the preceding element.
• \ (Symbol) [Translingual] Matches what the nth marked subexpression matched using parentheses: ( ).
• ^ (Symbol) [Translingual] Matches the start position within the string. Compare $, which matches the end position within the string.
• ^ (Symbol) [Translingual] Used with square brackets: [ ]. Matches a single character other than the characters and ranges specified between the square brackets.
• `lsqb` `rsqb` (Symbol) [Translingual] Matches a single character that is contained within the brackets, including ranges.
• `period` (Symbol) [Translingual] Matches any single character.
• `vert` (Symbol) [Translingual] Metacharacter that matches either the expression before or the expression after.

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