Regular Expressions 101

Pro

Group 1(\w+)

\w+any 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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

(\w+)\1\b

New

line of text
linne of text
line of text
linnnnnnnn of text
line of text

line of text
linne of text
line of text
linnnnnnnn of text
line of text