Regular Expressions 101

^start of line

\h*any horizontal whitespace character, repeated any number of times

\Sany non-whitespace character

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

Positive Lookahead(?=\R+(?:\h*\S.*\R+)?/{24})

\R+a newline sequence, repeated at least once

Non-Capturing Group(?:\h*\S.*\R+)?

?repeats the group contents below at most once:

\h*any horizontal whitespace character, repeated any number of times

\Sany non-whitespace character

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

\R+a newline sequence, repeated at least once

/{24}the literal / (47₁₀ / 57₈ / 2F₁₆) , repeated exactly 24 times

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

^\h*\S.*(?=\R+(?:\h*\S.*\R+)?/{24})

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