Regular Expressions 101

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/
^"\d+\/\d+\/\d+\s+\d+:\d+:\d+\s+-\s+(?<name>[^\(]+)\s+\(
/
gm
^ asserts position at start of a line
" matches the character " literally (case sensitive)
\d+
matches a digit (equal to [0-9])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
\/ matches the character / literally (case sensitive)
\d+
matches a digit (equal to [0-9])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
\/ matches the character / literally (case sensitive)
\d+
matches a digit (equal to [0-9])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
\s+
matches any whitespace character (equal to [\r\n\t\f\v ])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
\d+
matches a digit (equal to [0-9])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
: matches the character : literally (case sensitive)
\d+
matches a digit (equal to [0-9])
: matches the character : literally (case sensitive)
\d+
matches a digit (equal to [0-9])
\s+
matches any whitespace character (equal to [\r\n\t\f\v ])
- matches the character - literally (case sensitive)
\s+
matches any whitespace character (equal to [\r\n\t\f\v ])
Named Capture Group name
(?<name>[^\(]+)
\s+
matches any whitespace character (equal to [\r\n\t\f\v ])
\( 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