Regular Expressions 101

Pro

^start of line

!?optionally matches the literal ! (33₁₀ / 41₈ / 21₁₆)

Group 1(\d|\[\d-\d\])

1st Alternative\d

\da digit

2nd Alternative\[\d-\d\]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\da digit

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\da digit

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group 2(,!?(\d|\[\d-\d\]))*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

!?optionally matches the literal ! (33₁₀ / 41₈ / 21₁₆)

Group 3(\d|\[\d-\d\])

1st Alternative\d

\da digit

2nd Alternative\[\d-\d\]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\da digit

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\da digit

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

$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|\[\d-\d\]))*$

1
1,2,3
!2,!3
[1-2]
[1-4],[3-5]
![1-4],![3-5]
1,2,3,[1-4],[3-5]
![1-4],![3-5],1,2,!7