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((?:\d{2})(?:\:\d{2}){2}).*?\[\s(\d+).*?\[\s(\d+)

/

gm

1st Capturing Group

((?:\d{2})(?:\:\d{2}){2})

Non-capturing group

(?:\d{2})

\d

matches a digit (equivalent to [0-9]){2} matches the previous token exactly 2 times

Non-capturing group

(?:\:\d{2}){2}

{2} matches the previous token exactly 2 times

\: matches the character : with index 58_{10} (3A_{16} or 72_{8}) literally (case sensitive)

\d

matches a digit (equivalent to [0-9]){2} matches the previous token exactly 2 times

.

matches any character (except for line terminators)*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)

\[ matches the character [ with index 91_{10} (5B_{16} or 133_{8}) literally (case sensitive)

\s matches any whitespace character (equivalent to [\r\n\t\f\v ])

2nd Capturing Group

(\d+)

\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 any character (except for line terminators)*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)

\[ matches the character [ with index 91_{10} (5B_{16} or 133_{8}) literally (case sensitive)

\s matches any whitespace character (equivalent to [\r\n\t\f\v ])

3rd Capturing Group

(\d+)

\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)

Global pattern flags

g modifier: **g**lobal. All matches (don't return after first match)

m modifier: **m**ulti 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.

/

/

gm

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