Regular Expressions 101

Pro

^start of line

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?: *- *\d+)?

?repeats the group contents below at most once:

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?:, *\d+(?: *- *\d+)?)*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?: *- *\d+)?

?repeats the group contents below at most once:

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\d+a Unicode decimal digit, repeated at least once

$end of line

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

^\d+(?: *- *\d+)?(?:, *\d+(?: *- *\d+)?)*$

New

1,3,5-7, 10, 15 - 20
1
1,2
15,    16-17
3-4
6-8
6 -   9