Regular Expressions 101

Pro

, the literal text ,

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

Negated Character Class[^()\[\]]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Character Class[\)\]]

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

A, An(hi, world)

A, An[hi, world]

A, An(hi, world[hello, (hi , world) world]); This, These