In the context of the regex dialect of XSLT 2.0, I am looking for two "meta-regexes" that analyse other regexes. Each is discussed in a part of its own. (Part 1 posted as: Meta-regex for variable-length matching regexes (XSLT)) Part 2 Aim: A regex that provides for pre-calculating the length of the match that a fixed-length matching ...

In the context of the regex dialect of XSLT 2.0, I am looking for two "meta-regexes" that analyse other regexes. Each is discussed in a part of its own. (Part 2 posted as: Meta-regex to find fixed length of regex match (XSLT)) Part 1 Aim: A regex that would identify all those regexes that might yield matches of varying length, as ...

Hello there, I am using PHP, preg_match to pull out of various Auction titles for video games, the video game platform of those games.  I have a list of valid ones and trying to match back to them.  However as this is completely user entered data there is a enormous amount of variety in the titles, which leads to some interesting ...

Just use something like: ^From:[^<]+<(?!user1@example\.com)(?!user2@example\.org)(?!user3@example\.net).*?^X-Spam-Level:\s*(\S*) with singleline (s) and multiline (m) modifiers (so the dot matches newlines and ^ matches the beginning of each line).

Hi Mark, try this pattern: \d+(?=\syears?) It works also for "The dog is 1 year old" (the 's' of years is optional).

Sorry for committing thread necromancy, but I had some time on my hands and this post had no answer . My idea of a regex for this problem looks like this: (?is)<meta\s[^>]*\bcontent\s*=\s*(['"])?((?(1)(?!\1).*?|[^\s>]*))(?(1)\1) In PHP you would do something like: $pattern = ...

I sadly do not know Python, but if it's regular expressions are anywhere near those of my knowledge, just try adding a $-sign in the pattern after .autodbbackup. $ asserts the end of a string.