Regular Expressions 101

50F:the literal text 50F: (case sensitive)

Non-Capturing Group(?:(?!:[0-9]{2,3}[A-Z]?:).)*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!:[0-9]{2,3}[A-Z]?:)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-9]{2,3}

{2,3}matches between 2 and 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[A-Z]?

?matches at most one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

.any Unicode character (except for line terminators)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([A-Z]{2})

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (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

50F:(?:(?!:[0-9]{2,3}[A-Z]?:).)*?3\/([A-Z]{2})

New

some noise :50F: some noise 3/GB some noise :50A: 
some noise :50F: some noise some noise :50A: 3/GB 
some noise :50F: some : noise 3/GB some noise :50A: