Regular Expressions 101

Explanation

Pro

^start of line

Positive Lookahead(?=[%§#]+$)

Character Class[%§#]+

+matches at least one character from the set below:

%the literal % (37₁₀ / 45₈ / 25₁₆)

§the literal § (167₁₀ / 247₈ / A7₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$end of line

Group 1(.)

.any character (except for line terminators)

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

Negative Lookahead(?!\1)

\1the text saved by group 1

Group 2(.)

.any character (except for line terminators)

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

Negative Lookahead(?!\1|\2)

1st Alternative\1

\1the text saved by group 1

2nd Alternative\2

\2the text saved by group 2

.any character (except for line terminators)

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

^(?=[%§#]+$)(.).*(?!\1)(.).*(?!\1|\2).

New

%#
#%%§§#
§%5x#yz
%#§
ab§
!#%§