Regular Expressions 101

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

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

Non-Capturing Group(?:^(?=.*&.*&)|(?!^)\G)

1st Alternative^(?=.*&.*&)

^start of line

Positive Lookahead(?=.*&.*&)

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

&the literal & (38₁₀ / 46₈ / 26₁₆)

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

&the literal & (38₁₀ / 46₈ / 26₁₆)

2nd Alternative(?!^)\G

Negative Lookahead(?!^)

^start of line

\Gstart of current search

Negated Character Class[^&\n]*

*matches any number of characters outside the set below:

&the literal & (38₁₀ / 46₈ / 26₁₆)

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

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

&the literal & (38₁₀ / 46₈ / 26₁₆)

Positive Lookahead(?=.*&)

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

&the literal & (38₁₀ / 46₈ / 26₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?m)(?:^(?=.*&.*&)|(?!^)\G)[^&\n]*\K&(?=.*&)

New

GROUP 1
GROUP 1 & GROUP 2
GROUP 1 & GROUP 2 & GROUP 3
GROUP 1 & GROUP 2 & GROUP 3 & GROUP 4