Regular Expressions 101

Pro

(?s)applies the following effective flags to the remainder of the pattern: gs

s modifier: single line. Allows a dot to match line terminators

^start of string

.*?any character, repeated any number of times

Group 1(\b[A-Z]{3,}\s+\d{2}-\d{2})

\ban ASCII word boundary

Character Class[A-Z]{3,}

{3,}matches at least 3 characters from the set below:

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

\s+any whitespace character, repeated at least once

\d{2}a digit, repeated exactly 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

Negative Lookahead(?!-)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.*any character, repeated any number of times

Global pattern flags

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

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25 tokens

(?s)^.*?(\b[A-Z]{3,}\s+\d{2}-\d{2})(?!-).*

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