Regular Expressions 101

Group 1([a-zA-Z])

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

.any character (except for line terminators)

\1the text saved by group 1

.any character (except for line terminators)

\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

([a-zA-Z])..\1..\1

New

axxaxxaxx
xaxxaxxax
--a--a--a
-x--x--x-