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^.+: .{10,160}\s*\[[1-9]\d*(,\s*([1-9]\d*))*\]$

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gm

^ asserts position at start of a line

.

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 characters : literally (case sensitive).

matches any character (except for line terminators){10,160} matches the previous token between 10 and 160 times, as many times as possible, giving back as needed (greedy)

\s

matches any whitespace character (equivalent to [\r\n\t\f\v ])* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

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

Match a single character present in the list below

[1-9]

1-9 matches a single character in the range between 1 (index 49) and 9 (index 57) (case sensitive)

\d

matches a digit (equivalent to [0-9])* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

1st Capturing Group

(,\s*([1-9]\d*))*

* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data

, matches the character , with index 44_{10} (2C_{16} or 54_{8}) literally (case sensitive)

\s

matches any whitespace character (equivalent to [\r\n\t\f\v ])* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

2nd Capturing Group

([1-9]\d*)

Match a single character present in the list below

[1-9]

1-9 matches a single character in the range between 1 (index 49) and 9 (index 57) (case sensitive)

\d

matches a digit (equivalent to [0-9])\] matches the character ] with index 93_{10} (5D_{16} or 135_{8}) literally (case sensitive)

$ asserts position at the end of a line

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.

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gm

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