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When To Use \N And $N As Regular Expression Back-References
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Using regular expressions to manipulate data in a SPARQL query
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| | A pure, standards-compliant SPARQL query.
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regex: Regular Expressions as used in R
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| | [AI summary] This document explains the use of regular expressions in R, covering both extended and Perl-like regular expressions with their syntax, metacharacters, and applications.
| | paramdeo.com
Validating UUIDs with Regular Expressions in JavaScript - Paramdeo Singh
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Regex Tutorial - Backreferences To Match The Same Text Again
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| In a regular expression, parentheses can be used to group regex tokens together and for creating backreferences. Backreferences allow you to reuse part of the regex match in the regex, or in the replacement text.