Regular Expressions 101

Pro

1st Alternative[a-zA-Z]{4}\s+[a-zA-Z]\d{3}(*SKIP)(*F)

Character Class[a-zA-Z]{4}

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

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

\s+any whitespace character, repeated at least once

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

\d{3}a digit, repeated exactly 3 times

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative\w+\W*

\w+any word character, repeated at least once

\W*any non-word character, repeated any number of times

Global pattern flags

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

No unit tests · Add a test to get started

25 tokens

[a-zA-Z]{4}\s+[a-zA-Z]\d{3}(*SKIP)(*F)|\w+\W*

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