Regular Expressions 101

Pro

^start of line

Negative Lookahead(?!(?:(a|d))(?:;|$))

Non-Capturing Group(?:(a|d))

Group 1(a|d)

1st Alternativea

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

2nd Alternatived

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

Non-Capturing Group(?:;|$)

1st Alternative;

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

2nd Alternative$

$end of line

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

Group 2(\s*\z|$)

1st Alternative\s*\z

\s*any whitespace character, repeated any number of times

\zend of string

2nd Alternative$

$end of line

\R*a newline sequence, repeated any number of times

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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

Detailed match information will be displayed here automatically.

25 tokens

^(?!(?:(a|d))(?:;|$)).*(\s*\z|$)\R*

New


a;; z
toy;d;hh 
toy
;b;;jj
z;
d;23
d;23td
;;io;
b y;b;12
z
a;b;bb;;;34
z


a;; z
toy;d;hh 
toy
;b;;jj
z;
d;23
d;23td
;;io;
b y;b;12
z
a;b;bb;;;34
z