Regular Expressions 101

Pro

^start of line

Negative Lookahead(?!.*%[^sd])

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

%the literal % (37₁₀ / 45₈ / 25₁₆)

Negated Character Class[^sd]

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

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

Negative Lookahead(?!.*%d.*%d.*%d)

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

%dthe literal text %d (case sensitive)

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

%dthe literal text %d (case sensitive)

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

%dthe literal text %d (case sensitive)

Negative Lookahead(?!.*%s.*%s)

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

%sthe literal text %s (case sensitive)

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

%sthe literal text %s (case sensitive)

Positive Lookahead(?=.*%s)

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

%sthe literal text %s (case sensitive)

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

$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

^(?!.*%[^sd])(?!.*%d.*%d.*%d)(?!.*%s.*%s)(?=.*%s).*$

New

%d:%d:%d:%s
%d:%d:%s
%d:%s
%f:%d:%s

%d:%d:%d:%s
%d:%d:%s
%d:%s
%f:%d:%s