Here's another tack on this using a regular expression if matchChunk(theList,"(?m)^(\d)",tStartChar,tEndChar) then put the lineIndex of char tStartChar of theList into tLineNumber else put zero into tLineNumber end if
I tested this out and it works but don't know if it's any faster than looping through. Plus I think the lineIndex is a relatively recent addition so it won;t work with older versions of LC. Pete lcSQL Software <http://www.lcsql.com> On Thu, Jan 31, 2013 at 10:37 AM, <dunb...@aol.com> wrote: > Hi. > > > I tried this with a list "temp" of 24,000 lines. Takes about half a second: > > > > > on mouseup > sort temp numeric > put 0 into tCounter > repeat for each line tLine in temp > add 1 to tCounter > if char 1 of tLine is an integer then > exit repeat > end if > end repeat > answer tLine && tCounter > end mouseup > > > > > > Craig > > > > -----Original Message----- > From: Tiemo Hollmann TB <toolb...@kestner.de> > To: 'How to use LiveCode' <use-livecode@lists.runrev.com> > Sent: Thu, Jan 31, 2013 1:13 pm > Subject: AW: to find the first numeric line? > > > Its about 20,000 lines. > I have made it with cutting into halves, which works ok. Perhaps I give it > a > timestamp test compared to just looping through. > Tiemo > > > -----Ursprüngliche Nachricht----- > > Von: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] Im > Auftrag > > von dunb...@aol.com > > Gesendet: Donnerstag, 31. Januar 2013 18:56 > > An: use-livecode@lists.runrev.com > > Betreff: Re: to find the first numeric line? > > > > Hi. > > > > > > If you sort your alphanumeric list, you will, of course, already know > that > > the alphas sort before the digits, so the first digit will be down a bit. > > > > > > > > But how long is that list? After sorting, if you loop through using the > > "repeat for each..." variant and exit accordingly, I cannot imagine that > it > > would take more than an instant to find the first digital char. Old > > fashioned but trusty. > > > > > > I have done binary searches, splitting data in halves as you go so that > you > > cut down processing time, mainly finding stuff in long HC datasets. > > > > > > Craig Newman > > > > > > > > > > > > > > -----Original Message----- > > > > From: Tiemo Hollmann TB <toolb...@kestner.de> > > To: 'How to use LiveCode' <use-livecode@lists.runrev.com> > > Sent: Thu, Jan 31, 2013 11:54 am > > Subject: to find the first numeric line? > > > > > > Hello, > > > > I have a list with alphanumeric and numeric content. After sorting > numeric > > I would like to find the first line with a numeric first char. (the non > > numeric lines before can contain also numeric chars). I would like to > have > > a kind of lineoffset(isNumber(first char.),list,), but that's not > prebuilt. > > > > What would be the fastest or most straight forward way to look up such a > > list? Just looping through? Testing the first char every half of the list > > in a loop? Or is there a function I don't think of? > > > > Thanks for any pointers > > > > Tiemo > > > > > > > > > > > > > > > > _______________________________________________ > > use-livecode mailing list > > use-livecode@lists.runrev.com > > Please visit this url to subscribe, unsubscribe and manage your > > subscription > > preferences: > > http://lists.runrev.com/mailman/listinfo/use-livecode > > > > > > _______________________________________________ > > use-livecode mailing list > > use-livecode@lists.runrev.com > > Please visit this url to subscribe, unsubscribe and manage your > > subscription preferences: > > http://lists.runrev.com/mailman/listinfo/use-livecode > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
