Regular Expressions 101

Explanation

Pro

\ban ASCII word boundary

Non-Capturing Group(?:(?!(\w)(\w)\2?\1)\w)+

+repeats the group contents below at least once:

Negative Lookahead(?!(\w)(\w)\2?\1)

Group 1(\w)

\wany word character

Group 2(\w)

\wany word character

\2?optionally matches the text saved by group 2

\1the text saved by group 1

\wany word character

\ban ASCII word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

26 tokens

\b(?:(?!(\w)(\w)\2?\1)\w)+\b

New


xbarrabzz/1xoxxoxa14

hello, world, sun, x, mine, hola 
ohho, izzil, 112maam, 01221555

xyx
racecar


xbarrabzz/1xoxxoxa14

hello, world, sun, x, mine, hola 
ohho, izzil, 112maam, 01221555

xyx
racecar