Regular Expressions 101

Group 1((?<!\\)(?:\\\\)*)

Negative Lookbehind(?<!\\)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\\\)*

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

((?<!\\)(?:\\\\)*)%.*

New

\usepackage{test}%COMMENT1

TEXT
%COMMENT2
TEXT

Value is 10\%, this should not be removed. %COMMENT3

begin{tikz}[
important 1,
%COMMENT4
important 2, %COMMENT5
]

TEXT
%COMMENT 6

TEXT

Table: value1&value2\\%COMMENT7
Table: value1&value2\\      %COMMENT8
Table: value1&value2            \\%COMMENT 9
Table: value1&value2\\%            COMMENT 10
Table: value1&value2\\\\%COMMENT11

Substitution

$1