Regular Expressions 101

Pro

Negated Character Class[^)]

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Negative Lookahead(?![^(]*\))

Negated Character Class[^(]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

\)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

[^)](?![^(]*\))

New

John Smith
John Smith (RET)
Mr. John Smith's (RET) (1st)
John William Smith (RET)
John

John Smith
John Smith (RET)
Mr. John Smith's (RET) (1st)
John William Smith (RET)
John