Regular Expressions 101

1st Alternative^\s*\[[0-9]+]\s*-\s*

^start of line

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

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

2nd Alternative\s*$[^()]*$\s*$

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

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

$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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Search reference

Regular Expression

^\s*\[[0-9]+]\s*-\s*|\s*\([^()]*\)\s*$

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