Regular Expressions 101

Pro

\s*any whitespace character, repeated any number of times

Group 1($[^()]*(?:(?1)[^()]*)*$)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Non-Capturing Group(?:(?1)[^()]*)*

*repeats the group contents below any number of times:

(?1)calls group 1 as a subroutine

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

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.

25 tokens

\s*(\([^()]*(?:(?1)[^()]*)*\))

New

Company A Inc (COMPA)
Company B (BEELINE)
Company C Inc. (Coco)
Company D Inc.
Company E
Company A Inc (COMP(A),CP(B(Z)C))

Company A Inc (COMPA)
Company B (BEELINE)
Company C Inc. (Coco)
Company D Inc.
Company E
Company A Inc (COMP(A),CP(B(Z)C))