Regular Expressions 101

Pro

\ban ASCII word boundary

Positive Lookahead(?=[A-Z0-9-]*[A-Z])

Character Class[A-Z0-9-]*

*matches any number of characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[A-Z]

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

Positive Lookahead(?=[A-Z0-9-]*[0-9])

Character Class[A-Z0-9-]*

*matches any number of characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]

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

Character Class[A-Z0-9]+

+matches at least one character from the set below:

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

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

Non-Capturing Group(?:-[A-Z0-9]+)+

+repeats the group contents below at least once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[A-Z0-9]+

+matches at least one character from the set below:

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

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

\ban ASCII word boundary

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.

25 tokens

Regular Expression

\b(?=[A-Z0-9-]*[A-Z])(?=[A-Z0-9-]*[0-9])[A-Z0-9]+(?:-[A-Z0-9]+)+\b

New

Hello World 123 abc 1AB2C-D3FGH-456I7-JK8LM-NOP9Q Hello World 123 abc should return 1AB2C-D3FGH-456I7-JK8LM-NOP9Q
Hello World 123 abc 11111-1111-1111 Hello World 123 abc
Hello World 123 abc aaaa-aaaa-aaaa-aaa Hello World 123 abc

A1111-1111-1111