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my @lines = <DATA>; my @matching_indices = grep $lines[$_] =~ /id:\s?\d/, 0 .. $#lines; ... #Comment 2 *333 23 ss id: 002 aaa bbb ccc *22 233333333 34432 233 44
#Comment *333 23 ss id: 002 aaa bbb ccc ... #Comment 2 *ss id addr id: 099 bbb ccc aaa *22 233333333 34432 233 44