regex match longest substring with equal first and last char

/(\w)(\w*)\1/   

For this string:"mgntdygtxrvxjnwksqhxuxtrv" I match "txrvxjnwksqhxuxt" (using Ruby), but not the even longer valid substring "tdygtxrvxjnwksqhxuxt".

https://stackoverflow.com/questions/65555069/regex-match-longest-substring-with-equal-first-and-last-char January 04, 2021 at 05:21AM