Regular Expressions 101

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/
[[^\/]+(.+)\/[3-9]\d\d\-
/
gm
Match a single character present in the list below
[[^\/]
+ matches the previous token between one 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 / with index 4710 (2F16 or 578) literally (case sensitive)
1st Capturing Group
(.+)
.
matches any character (except for line terminators)
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
\/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
Match a single character present in the list below
[3-9]
3-9 matches a single character in the range between 3 (index 51) and 9 (index 57) (case sensitive)
\d matches a digit (equivalent to [0-9])
\d matches a digit (equivalent to [0-9])
\- matches the character - with index 4510 (2D16 or 558) 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