Hi Josiah, Glad you like the "neat little tool" !!! It was fun making it because it was harder than I thought - with so many initially un-imagined situations. Interestingly, it made me realize that what seems like a simple situation in life, actually has so many complex unseen or unnoticed interdependencies. What we imagine is so clear cut is just our own illusion created from a lack of understanding and insight. Who would have thought coding could make one philosophize!
I actually put the stackoverflow link <https://stackoverflow.com/questions/13194322/php-regex-to-check-date-is-in-yyyy-mm-dd-format> of where I got the regex into a field in the date Macro tiddler. You can read over there why it was constructed that way, and how it takes into account exceptional leap years: *Every year divisible by 4 is a leap year, except when it is divisible by > 100 unless it is divisible by 400. * > There is a better YYYY-MM-DD regex a little below that which validates from years 1000 - 9999 but I got *blurry eyed* when trying to figure out the correct "match remembering" group for the separators . / - and so used the present one. The one I would like to use is in a comment a little further down in that stackoverflow post: ^((([1-9]\d{3})\-(0[13578]|1[02])\-(0[1-9]|[12]\d|3[01]))|(((19|[2-9]\d)\d{2 })\-(0[13456789]|1[012])\-(0[1-9]|[12]\d|30))|(([1-9]\d{3})\-02\-(0[1-9]|1\d |2[0-8]))|(([1-9]\d(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][ 26])00))\-02\-29))$ Regards On Sunday, April 14, 2019 at 5:30:31 PM UTC+7, @TiddlyTweeter wrote: > > Hi S.S., I got very intrigued by the regex in this neat little tool of > yours! The regext has a couple of issues the are not immediately obvious on > accurate matching for dates in February. I've written a new version that is > easier to understand. It's also easier to set date ranges in it. I'm > testing it at the moment and will post it when I'm sure it works reliably. > > Best wishes > Josiah > -- 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 tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/42758349-a458-4136-ae51-1c4f42ef6175%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
