Regular Expressions 101

Pro

\ban ASCII word boundary

Group 1(\w+)

\w+any word character, repeated at least once

Group 2(\W+\1\b)+

+repeats the group contents below at least once:

\W+any non-word character, repeated at least once

\1the text saved by group 1

\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.

25 tokens

\b(\w+)(\W+\1\b)+

New

test, test, test

test, test, test