Nicolas and others, Boy, I'm learning a lot about arrays. Thanks.
If we're going to sort, we could sort the unique values to the top, then only loop down until we hit a duplicate value. Something like the following: function f v,x if x & cr & x is in v then return 1 else return zero end if end f on mouseUp put fld 1 into v -- both lists together sort v sort v numeric by f(v,each) put "STARTER" into previous_x repeat for each line x in v if x is previous_x then delete last line of h exit repeat end if put x & cr after h put x into previous_x end repeat put h into fld 2 -- unique values end mouseUp --- On Wed, 6/22/11, Nicolas Cueto <nicon...@gmail.com> wrote: From: Nicolas Cueto <nicon...@gmail.com> Subject: Re: filter? To: "How to use LiveCode" <use-livecode@lists.runrev.com> Date: Wednesday, June 22, 2011, 11:23 PM Went with Michael Kann's solution. Thanks to all, tho. BTW, my request's reason had to do with Livecode's odd group behaviour. -- Nicolas Cueto (iPhone) On 2011/06/23, at 11:19, Michael Kann <mikek...@yahoo.com> wrote: > If you want to use a SORT you can try something like the following: > > on mouseUp > put "1,2,3,4" into v > put "1,2,3,4,5" & cr before v > replace comma with cr in v > sort v > repeat for each line x in v > if x & cr & x is not in v then > put x & cr after h > end if > end repeat > put h into fld 3 -- "5" > end mouseUp > > --- On Wed, 6/22/11, Pete <p...@mollysrevenge.com> wrote: > > From: Pete <p...@mollysrevenge.com> > Subject: Re: filter? > To: "How to use LiveCode" <use-livecode@lists.runrev.com> > Date: Wednesday, June 22, 2011, 8:30 PM > > I have a feeling this is probably going to get a lot of responses related to > the most efficient way to do this! I have no idea how efficient this would > be but I'll start the ball rolling with this code. > > repeat with x=1 to the number of lines in tlist1 > if line x of tlist1 is not among the lines of tlist 2 then > < you found a unique tlist1 value > > end if > end repeat > repeat with x=1 to the number of lines in tlist2 > if line x of tlist2 is not among the lines of tlist1 then > < you found a unique tlist2 value > > end if > end repeat > > Another thought I had involves using an array as follows: > > repeat with x=1 to the number of lines in tlist1 > add 1 to array[line x of tlist1] > end repeat > repeat with x=1 to the number of lines in tlist2 > add 1 to array[line x of tlist2] > end repeat > repeat for each key myKey in array > if array[myKey]=1 then > < you found a unique value > > end if > end repeat > > Depending on how many entries you expect in each list and how long each > entry is, the array solution could chew up a huge amount of memory. > > These are both pretty simplistic solutions which probably means they > wouldn't be the fastest. I have no idea how fast either of them might be > and I know there are definitely some efficiencies to be had by using either > repeat with vs repeat for but I can't remember which is the faster. > > > Pete > Molly's Revenge <http://www.mollysrevenge.com> > > > > > On Wed, Jun 22, 2011 at 5:38 PM, Nicolas Cueto <nicon...@gmail.com> wrote: > >> Hi again. >> >> Given 2 lists of cr-delimited values (tList1, tList2), what's the fastest >> way of getting the unique value(s)? >> >> Ex, "1,2,3,4" & "1,2,3,4,5" = "5" >> (but cr instead of comma) >> >> Thanks. >> >> -- >> Nicolas Cueto (iPhone) >> _______________________________________________ > > _______________________________________________ > 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
