Regular Expressions 101

Pro

Group 1((([0-9a-fxA-FX]){2})(?|[,\n])){8,16}

{8,16}repeats the group contents below between 8 and 16 times:

Group 2(([0-9a-fxA-FX]){2})

Group 3([0-9a-fxA-FX]){2}

{2}repeats the group contents below exactly 2 times:

Character Class[0-9a-fxA-FX]

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

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

Branch Reset Group(?|[,\n])

Character Class[,\n]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\na line-feed (newline) character (ASCII 10)

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

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25 tokens

((([0-9a-fxA-FX]){2})(?|[,\n])){8,16}

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