Regular Expressions 101

Group 1([^\w\s]|_)

1st Alternative[^\w\s]

Negated Character Class[^\w\s]

\wa Unicode word character

\sa Unicode whitespace character

2nd Alternative_

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 2(\1)+

+repeats the group contents below at least once:

\1the text saved by group 1

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

([^\w\s]|_)(\1)+

New

????? = ?
..... = .
!!!!! = !
----  = -
***** = *