Regular Expressions 101

1st AlternativeTime[^\n]*\n((?:(?!Time|aaa)[^\n]*(\n|$))*(?=Time|$))

Timethe literal text Time (case sensitive)

Negated Character Class[^\n]*

*matches any number of characters outside the set below:

\na line-feed (newline) character (ASCII 10)

Group 1((?:(?!Time|aaa)[^\n]*(\n|$))*(?=Time|$))

Non-Capturing Group(?:(?!Time|aaa)[^\n]*(\n|$))*

*repeats the group contents below any number of times:

Negative Lookahead(?!Time|aaa)

1st AlternativeTime

Timethe literal text Time (case sensitive)

2nd Alternativeaaa

aaathe literal text aaa (case sensitive)

Negated Character Class[^\n]*

*matches any number of characters outside the set below:

\na line-feed (newline) character (ASCII 10)

Group 2(\n|$)

1st Alternative\n

\na line-feed (newline) character (ASCII 10)

2nd Alternative$

$end of string, or before its final line terminator

Positive Lookahead(?=Time|$)

1st AlternativeTime

Timethe literal text Time (case sensitive)

2nd Alternative$

$end of string, or before its final line terminator

2nd Alternative(?<=\n)(?!Time|aaa)[^\n]+\n

Positive Lookbehind(?<=\n)

\na line-feed (newline) character (ASCII 10)

Negative Lookahead(?!Time|aaa)

1st AlternativeTime

Timethe literal text Time (case sensitive)

2nd Alternativeaaa

aaathe literal text aaa (case sensitive)

Negated Character Class[^\n]+

+matches at least one character outside the set below:

\na line-feed (newline) character (ASCII 10)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

s modifier: single line. Allows a dot to match line terminators

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

Time[^\n]*\n((?:(?!Time|aaa)[^\n]*(\n|$))*(?=Time|$))|(?<=\n)(?!Time|aaa)[^\n]+\n

New

Time 00:00:01
kkk
lll
aaa
...
Time 00:00:03
kkk
kkk
kkk
lll
lll
aaa
aaa
...
Time 00:00:04
kkk
lll
...
Time 00:00:04
kkk
lll
...