Regular Expressions 101

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/
\s*(?:\[[^][]*]|\([^()]*\))
/
gm
\s*
matches any whitespace character (equal to [\r\n\t\f\v ])
* Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Non-capturing group
(?:\[[^][]*]|\([^()]*\))
1st Alternative
\[[^][]*]
\[ matches the character [ literally (case sensitive)
Match a single character not present in the list below
[^][]*
* Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
][ matches a single character in the list ][ (case sensitive)
] matches the character ] literally (case sensitive)
2nd Alternative
\([^()]*\)
\( matches the character ( literally (case sensitive)
Match a single character not present in the list below
[^()]*
* Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
() matches a single character in the list () (case sensitive)
\) matches the character ) literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String

Substitution

Processing...