Regular Expressions 101

Pro

@defaultthe literal text @default (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 1(.*?)

.*?any character (except for line terminators), repeated any number of times

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Negated Character Class[^\r\n]+

+matches at least one character outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Positive Lookahead(?=[\s\S]*@\1@)

Character Class[\s\S]*

*matches any number of characters from the set below:

\sany whitespace character

\Sany non-whitespace character

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\1the text saved by group 1

@the literal @ (64₁₀ / 100₈ / 40₁₆)

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

@default\.(.*?)@[^\r\n]+(?=[\s\S]*@\1@)

New

@default.RR.TT@=393993
@default.h.i.j@=234
@asdfasd.fasdfs.asdfa@=23423
@default.a.b.c@=QQQ
@h.i.j@=aaaa
@a.b.c@=x
@d.e.f@=y

byomakesh.x.parida@aib.ie

@default.RR.TT@=393993
@default.h.i.j@=234
@asdfasd.fasdfs.asdfa@=23423
@default.a.b.c@=QQQ
@h.i.j@=aaaa
@a.b.c@=x
@d.e.f@=y