Regular Expressions 101

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

1st Alternative$\d+$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d+a digit, repeated at least once

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\d+(?:\s*-\s*\d+)?

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\s*any whitespace character, repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s*any whitespace character, repeated any number of times

\d+a digit, repeated at least once

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

*repeats the group contents below any number of times:

\s+any whitespace character, repeated at least once

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

1st Alternative$\d+$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d+a digit, repeated at least once

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\d+(?:\s*-\s*\d+)?

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\s*any whitespace character, repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s*any whitespace character, repeated any number of times

\d+a 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

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26 tokens

Regular Expression

(?:\(\d+\)|\d+(?:\s*-\s*\d+)?)(?:\s+(?:\(\d+\)|\d+(?:\s*-\s*\d+)?))*$

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