Regular Expressions 101

#Sectionthe literal text #Section (case sensitive)

Group 1(\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:(?!#Section\d).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!#Section\d)

#Sectionthe literal text #Section (case sensitive)

\da digit

.any character (except for line terminators)

\ban ASCII word boundary

Jack/M,the literal text Jack/M, (case sensitive)

\d+a digit, repeated at least once

\h+any horizontal whitespace character, repeated at least once

Group 2(\d+(?:\.\d+)?)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\ban ASCII word boundary

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

#Section(\d+)(?:(?!#Section\d).)*\bJack/M,\d+\h+(\d+(?:\.\d+)?)\b

New

#Section250342,Main,First/HS/12345/Jack/M,2000 10.00,#Section250322,Main,First/HS/12345/Aaron/N,2000 17.00,#Section250399,Main,First/HS/12345/Jimmy/N,2000 12.00,#Section251234,Main,First/HS/12345/Jack/M,2000 11.00

Regular Expression

Substitution