[NeoMac]

Regarding Regular Expressions:

1) How do you search for a NULL and|or void value ???

2) can you recommend a book on Regular Expressions?
(perhaps GREP or REGEX)

Tnx.

[ladavacm]

First, books explaining regular expressions:
Kernighan, Pike "UNIX Programming Environment"; unfortunately, out of print for some decades
Larry Wall, et. al. "Programming Perl"; great book, accessible to newcomers to programming, as well as experienced veterans; it covers basic, extended, and Perl exteneded regexps to painful detail (among a plethora of toher things)

As to your question, a regex can find only something that is there So, the real question is how is the invalid or NULL value represented in the string that you want to search? Beware of empty strings: these can be found between every two characters (i.e. you will find lots of them)

[NeoMac]

Originally posted by ladavacm:

As to your question, a regex can find only something that is there So, the real question is how is the invalid or NULL value represented in the string that you want to search?

1/2 hour after I posted the thread, I realized that it was a stupid question and that regex had nothing to do with what I wanted to do.

It was late and I was too tired to realize the stupidity. I checked the system logs this morning and the last output was:

Code:
12:13AM - Error Wil Robinson! - your bio-drive is experiencing a bought of stupidity.

[This message has been edited by NeoMac (edited 05-17-2001).]