Regular Expressions 101

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/
(dateAdded:\s\/Date\()\d+\)\/\}\]
/
gm
1st Capturing Group
(dateAdded:\s\/Date\()
dateAdded: matches the characters dateAdded: literally (case sensitive)
\s matches any whitespace character (equivalent to [\r\n\t\f\v ])
\/ matches the character / literally (case sensitive)
Date matches the characters Date literally (case sensitive)
\( matches the character ( literally (case sensitive)
\d
matches a digit (equivalent to [0-9])
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
\) matches the character ) literally (case sensitive)
\/ matches the character / literally (case sensitive)
\} matches the character } literally (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