Regular Expressions 101

Explanation

Pro

.any character (except for line terminators)

(?R)?optionally recurses into the entire pattern

<BckSp>the literal text <BckSp> (case sensitive)

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

.(?R)?<BckSp>

Helllo<BckSp><BckSp>o world

Helllo<BckSp><BckSp>o world