Regular Expressions 101

^start of line

Negative Lookahead(?![EB]#)

Character Class[EB]

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

#the literal # (35₁₀ / 43₈ / 23₁₆)

Character Class[A-G]

A-Gone character from A (65₁₀) to G (71₁₀) (case sensitive)

Group 1(\#|b)?

?repeats the group contents below at most once:

1st Alternative\#

\#the literal # (35₁₀ / 43₈ / 23₁₆)

2nd Alternativeb

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

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.

Search reference

Regular Expression

^(?![EB]#)[A-G](\#|b)?

New

A
A#
Ab
B
Bb
C
C#
Cb
D
D#
Db
E
Eb
F
F#
Fb
G
G#
Gb
B#
E#