Regular Expressions 101

1st Alternative\s+(?:[()-]\s*)?

\s+a Unicode whitespace character, repeated at least once

Non-Capturing Group(?:[()-]\s*)?

?repeats the group contents below at most once:

Character Class[()-]

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

2nd Alternative[,()]\s*

Character Class[,()]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

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.

Search reference

Regular Expression

\s+(?:[()-]\s*)?|[,()]\s*

New

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