Is There a Null Character Representation

[PHenry1026]

Greetings,

Is there a null character representation, that I could use in a character set to represent nothing. For example.

[null,:]

So the regex would work if it found a comma, a colon or nothing.

[Jim Bretti]

I don't know about a null character (other than \x00), but would something like this work for what you need?

[,:]?

[PHenry1026]

Hi Jim,

Thanks for the suggestion. [,:]? would'nt work because the most common usage I would have for it would be in a lookbehind assertion which requires fixed length. I will play around with \x00 and see if it or any of its forms like \x{00}, work for me.

[Jim Bretti]

I doubt \x00 will do what you want. That will match an actual null character in the text. I can't think of any way to check for something like this that has a fixed length.