Regular Expressions 101

Group 1([A-Z])

Character Class[A-Z]

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

Group 2(\1+)

\1+the text saved by group 1, repeated at least once

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

([A-Z])(\1+)

New

DI,III.II  =>  DI,IZZ.IZ
B,EFF.HH  =>   B,EFZ.HZ
CEE,EEE.BB  => CEZ,ZZZ.BZ