Regular Expressions 101

(?-s)applies the following effective flags to the remainder of the pattern: gm

s modifier: -single line. A dot does not match line terminators such as \n

Group 1(^.+\R?)

^start of line

.+any character (except for line terminators), repeated at least once

\R?optionally matches a newline sequence

\ban ASCII word boundary

\d{2}a digit, repeated exactly 2 times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{2}a digit, repeated exactly 2 times

\ban ASCII word boundary

%the literal % (37₁₀ / 45₈ / 25₁₆)

Non-Capturing Group(?:\R^(?!.*\b\d{2}\.\d{2}\b%).+){0,2}

{0,2}repeats the group contents below between 0 and 2 times:

\Ra newline sequence

^start of line

Negative Lookahead(?!.*\b\d{2}\.\d{2}\b%)

.*any character (except for line terminators), repeated any number of times

\ban ASCII word boundary

\d{2}a digit, repeated exactly 2 times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{2}a digit, repeated exactly 2 times

\ban ASCII word boundary

%the literal % (37₁₀ / 45₈ / 25₁₆)

.+any character (except for line terminators), repeated at least once

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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Search reference

Regular Expression

(?-s)(^.+\R?)\b\d{2}\.\d{2}\b%(?:\R^(?!.*\b\d{2}\.\d{2}\b%).+){0,2}

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