I am looking for neat way to grep a non-empty string that basically contains a hostname, which might be in FWDN form or without the domain, for example:
The file I am parsing contains blan lines (^$) and also series of "-" which in other places are used as separator (-----------------------).
As you of course know hyphen ("-") may well occur in a hostname.
if (/\S/) - is not good as it catches "--------------" too
if (! /\s/) - is not good either for the same reason
I was playing with regexes like: /[A-Za-z0-9.-]+/ but couldn't get what I actually need. That matched series of hyphens either. I need a regex that would allow for hyphens but denied "hyphens only". In other words hyphens are permitted but only when there are other letters as well.
I was able to get around my problem using two or three if... tests but this problem is still sitting in the back of my head.
I think I made my explanation unclear... apologies for that. Be sure I'll be seeking for answer myself too
Kind regards to Everyone.