Regular Expressions 101

Group 1(\w)

\wany word character

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\1the text saved by group 1

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(\w)a\1

New

hah, haa, dad, dada