Regular Expressions 101

Group 1($(?>[^()\n]+|(?1))*$)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Atomic Group(?>[^()\n]+|(?1))*

*repeats the group contents below any number of times:

1st Alternative[^()\n]+

Negated Character Class[^()\n]+

+matches at least one character outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

2nd Alternative(?1)

(?1)calls group 1 as a subroutine

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Non-Capturing Group(?:([^()\n]+)((?1)))?

?repeats the group contents below at most once:

Group 2([^()\n]+)

Negated Character Class[^()\n]+

+matches at least one character outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

Group 3((?1))

(?1)calls group 1 as a subroutine

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

(\((?>[^()\n]+|(?1))*\))(?:([^()\n]+)((?1)))?

New

(weight gt 10)

(weight gt 10) OR (weight lt 100)

((weight gt 10) OR (weight lt 100)) AND (length lt 50)

(length lt 50) AND ((weight gt 10) OR (weight lt 100))

(length lt 50) nonsense ((weight gt 10) OR (weight lt 100))

(\((?>[^()]+|(?1))*\)) <-- original

Regular Expression

Extraction