Regular Expressions 101

Pro

Non-Capturing Group(?:^|\s)

1st Alternative^

^start of string

2nd Alternative\s

\sany whitespace character

Group 1(\d+\/\d+)

\d+a digit, repeated at least once

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a digit, repeated at least once

Positive Lookahead(?=\s|$)

1st Alternative\s

\sany whitespace character

2nd Alternative$

$end of string, or before its final line terminator

Global pattern flags

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

s modifier: single line. Allows a dot to match line terminators

Detailed match information will be displayed here automatically.

25 tokens

(?:^|\s)(\d+\/\d+)(?=\s|$)

New

1/12344 2/23ABC 2/233423/2425 1/12344

1/12344 2/23ABC 2/233423/2425 1/12344