Regular Expressions 101

Explanation

Pro

^start of string

Group 1(\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:(?:\-|\.\.)(\d+))?

?repeats the group contents below at most once:

Non-Capturing Group(?:\-|\.\.)

1st Alternative\-

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative\.\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(\d+)

\d+a digit, repeated at least once

\,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

$end of string

Global pattern flags

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

Ready to run

26 tokens

^(\d+)(?:(?:\-|\.\.)(\d+))?\,?$