Regular Expressions 101

Pro

&the literal & (38₁₀ / 46₈ / 26₁₆)

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

Negated Character Class[^[]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

]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

gotcha & symbol [but not that & one [even that & one] and not this & one] but this  is & ok

gotcha & symbol [but not that & one [even that & one] and not this & one] but this  is & ok