Regular Expressions 101

Pro

(?i)applies the following effective flags to the remainder of the pattern: gmi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

^start of line

Group 1(\w*?)

\w*?any word character, repeated any number of times

Group 2(\w+?)

\w+?any word character, repeated at least once

Group 3(\w*)

\w*any word character, repeated any number of times

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Group 4(\2)

\2the text saved by group 2

$end of line

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.

25 tokens

(?i)^(\w*?)(\w+?)(\w*);(\2)$

New

castellan;STELLA
castellan;TELL
castellan;ELLA
castellan;STELL

castellan;STELLA
castellan;TELL
castellan;ELLA
castellan;STELL