Regular Expressions 101

Character Class[\S]*

*matches any number of characters from the set below:

\Sany non-whitespace character

Non-Capturing Group(?:\[%)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

Group 1(\w+)

\w+any word character, repeated at least once

Non-Capturing Group(?:%])

%]the literal text %]

Non-Capturing Group(?:(?:[^\S\n]*=[^\S\n]*([^\n]*[\S])))?

?repeats the group contents below at most once:

Non-Capturing Group(?:[^\S\n]*=[^\S\n]*([^\n]*[\S]))

Negated Character Class[^\S\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

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

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Negated Character Class[^\S\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

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

Group 2([^\n]*[\S])

Negated Character Class[^\n]*

*matches any number of characters outside the set below:

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

Character Class[\S]

\Sany non-whitespace character

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

[\S]*(?:\[%)(\w+)(?:%])(?:(?:[^\S\n]*=[^\S\n]*([^\n]*[\S])))?

New

[%Variable%]
[%Another_One%] = Lots of characters but no trailing spaces     
     [%MoreVariables_44%] =              NotWhiteSpace Sensistive
[%NoBlanksAllowed%] =

Regular Expression

Substitution