Regular Expressions 101

Explanation

Pro

Non-Capturing Group(?:^| )

1st Alternative^

^start of line

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Positive Lookahead(?=.{2,5}(?=$| ))

.{2,5}any character (except for line terminators), repeated between 2 and 5 times

Positive Lookahead(?=$| )

1st Alternative$

$end of line

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Group 1([A-Z]{1,4}[0-9]{1,4})

Character Class[A-Z]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

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

Character Class[0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

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

Positive Lookahead(?=$| )

1st Alternative$

$end of line

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

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

(?:^| )(?=.{2,5}(?=$| ))([A-Z]{1,4}[0-9]{1,4})(?=$| )

New

AAAA1 AAA11 AA111AA A1111 AAAAA1 AAAA1111 A1A1A

AAAA1 AAA11 AA111AA A1111 AAAAA1 AAAA1111 A1A1A