Question

For the given text:

This text A,is separated,by a comma A,unpreceded by the uppercase A,letter A,ok?,

Expected matches:

This text A,is separated,

and

by a comma A,unpreceded by the uppercase A,letter A,ok?,

Please write a regex that would work like described. Preferably one that will work with .NET

Answer 1

I think the regex feature you’re after is negative lookbehind. Try splitting on this regex:

(?<!A),

Eg.

new Regex(@"(?<!A),").Split("This text A,is separated,by a comma A,unpreceded by the uppercase A,letter A,ok?,");