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Perl Compatible Regular Expressions - Wikipedia
Grep in PCRE with pcregrep (or pcre2grep)—Test PCRE regex with pcretest (or pcre2test)
pcretest specification
Regex Quantifier Tutorial: Greedy, Lazy, Possessive
Know your regular expressions
String.prototype.split() - JavaScript | MDN
pcre regex - YouTube
Where GREP Came From - Computerphile - YouTube
Regexbuddy! very nice tool - YouTube
REGEX 101 Powerful Field Extractions for Fun & Profit! - YouTube
Regular Expressions: Quantifiers, Groups and Anchors - YouTube
Best of Fluent 2012: /Reg(exp){2}lained/: Demystifying Regular Expressions - YouTube
Learn Regular Expressions the Hard Way
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