![]() Notice how each of those regexes are made using regex literals – the ability to create a regular expression by starting and ending your regex with a /. Emacs's regexp builder highlights matches and capturing groups in a buffer of your choice, and it works with a range of regular expression flavors. Edit RegEx Generator Frequently Asked Questions What is a regular expression A regular expression (regex, regexp or rational expression) is a sequence of characters that specifies a search pattern. re-builder: the Interactive regexp builder Even if you're a wizard at regular expressions, you may occasionally want a little help.
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