Regular Expressions 101

Group 1(\b\w+(?:\s+\w+)*?)

\ba Unicode word boundary

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?:\s+\w+)*?

*?repeats the group contents below any number of times:

\s+a Unicode whitespace character, repeated at least once

\w+a Unicode word character, repeated at least once

Group 2(,?\s*\1)+

+repeats the group contents below at least once:

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*a Unicode whitespace character, repeated any number of times

\1the text saved by group 1

\ba Unicode 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.

Search reference

Regular Expression

(\b\w+(?:\s+\w+)*?)(,?\s*\1)+\b



    I, I, I am really wanting to go, but I I am not, am not am notty able to do it.

a b a b a b a b