Regular Expressions 101

Character Class[0-9a-f]{8}

{8}matches exactly 8 characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9a-f]{4}

{4}matches exactly 4 characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[1-5]

1-5one character from 1 (49₁₀) to 5 (53₁₀)

Character Class[0-9a-f]{3}

{3}matches exactly 3 characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[89ab]

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

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

Character Class[0-9a-f]{3}

{3}matches exactly 3 characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9a-f]{12}

{12}matches exactly 12 characters from the set below:

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

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

Global pattern flags

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

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Search reference

Regular Expression

[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}

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