I would like some help with regex. I'm trying to create an expression that will include certain strings and exclude certain strings. For example: I would like to include any URL containing mobil...

I need a regex to match if anywhere in a sentence there is NOT either < or >. If either < or > are in the string then it must return false. I had a partial success with this but only if...

The following are pseudo examples, not real regex, but still an example of what I mean: .* (anything) -.* (NOT anything) [A-Z] (Any letter A to Z, caps only) -[A-Z] (NOT any letter A to Z,...

Is it possible to write a regexp rule in "one line" that says: neither A nor B. For example: String must contain NEITHER "foo" NOR "bar". Why one line? Because the filtering tool I am using acc...

I've got a regex issue, I'm trying to ignore just the number '41', I want 4, 1, 14 etc to all match. I've got this [^\b41\b] which is effectively what I want but this also ignores all single itera...

Easy question this time. I'm trying to test whether or not a string does not contain a character using regular expressions. I thought the expression was of the form "[^x]" where x is the character...

I've searched for questions like this, but all the cases I found were solved in a problem-specific manner, like using !g in vi to negate the regex matches, or matching other things, without a...

There are quite a few results for add trailing slash .htaccess on Google, but all examples I found require the use of your domain name, as in this example: RewriteEngine On RewriteBase / RewriteCo...

Can regular expression be utilized to match any string except a specific string constant (i.e. "ABC")? Is it possible to exclude just one specific string constant?

I would like to negate a set of words using java regex. Say, I want to negate cvs, svn, nvs, mvc. I wrote a regex which is ^[(svn|cvs|nvs|mvc)]. Some how that seems not to be working.

Using Ruby, how can I use a single regex to match all occurrences of 'y' in "xy y ay xy +y" that are NOT preceded by x (y, ay, +y)? /[^x]y/ matches the preceding character too, so I need an alterna...

How would I go about using a negative lookbehind(or any other method) regular expression to ignore strings that contains a specific substring? I've read two previous stackoverflow questions: java-...

I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v). However, is it possible to match lines that do not contain a specific word, e.g. hede, using a re...

I am looking for a regex that will match a string that starts with one substring and does not end with a certain substring. Example: // Updated to be correct, thanks @Apocalisp ^foo.*(?<!bar)$...