Regular expressions my secret love
summary
Walks through concrete regex tricks and shows what actually changes results: use non-capturing groups to stop unwanted array entries, name captures with (?<name>...) and use \k<name> to backreference by name so repeated words like "Bonjour Bonjour" match, add the s dotall flag* so . finally matches newlines, and use Unicode property escapes like \p{Emoji} to detect emoji. Mentions lookbehind, String.prototype.matchAll, and replacement functions with $ and that these features work as demonstrated.
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