See the latest update of documentation wiki in that most part of this thread has been documented
rev: 0.5 url: http://tw-regexp.tiddlyspot.com/ --Mohammad On Sunday, August 25, 2019 at 11:34:11 PM UTC+4:30, @TiddlyTweeter wrote: > > Mark S. wrote: >> >> I think he means "02" literally. Usually IP numbers aren't padded, so not >> sure. >> >> It's the range 0-255 that's problematic. Here's what I have for the range: >> >> <option value="^(\b\d\b|\b\d\d\b|1\d\d|2[0-4]\d|25[0-5])">IP range >> 0-256</option> >> > > IF that means numbers 000 to 255 it looks doable. > > Hmm, I guess with an IP you could add the mandatory delimiter (usually >> ".") and repeat the group. But you would have to manually repeat the group >> at the end where the delimiter must not be. >> > > That is quite easy in regex as you can make it just *"\.?"*. Repeat is > easy, just put the dot first on repeats. > > And then there's zero padding. Most of the IP numbers I've seen are not >> zero-padded, but ... >> > > That is much more difficult in regex. So long as the system throws the > 0's away when not needed it may be okay? > > I think the first thing I would do is see what the internet says. >> >> A search for "regular expression ip address" immediately turns up a page >> from O'Reilly, with both a simple >> version and an accurate version for checking IP. As I expected, they're >> able to do a repeat on the structure 3 times, but >> have to do the last one by hand. They've figured out the 0 padding: >> >> ^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ >> >> >> So ... no need to rebuild the wheel for most common use cases. Hmm, I >> wonder about IPv6 ? >> > > >> Ok, sorry for the stream-of-consciousness problem-working. >> > > Its interesting & useful! > > TT > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/0ec30d7d-d469-47eb-bb9f-11c412e1673b%40googlegroups.com.
