Stumped on Datagrid Problem

Tom Glod tom at makeshyft.com
Sat Dec 15 11:14:46 EST 2018


Hi Bob, Thanks, yes thats what I ended up doing as part of the solution
.... it also helped to read this massive but genius thread :)

http://forums.livecode.com/viewtopic.php?f=8&t=24945



On Fri, Dec 14, 2018 at 9:31 PM Bob Sneidar via use-livecode <
use-livecode at lists.runrev.com> wrote:

> You need to sort the keys of the array and populate accordingly.
>
> put the keys of aData into tKeyList
> sort tKeyList numeric descending
>
> repeat for each line tKey in tKeyList
> ...
>
> Bob S
>
>
> > On Dec 14, 2018, at 14:10 , Tom Glod via use-livecode <
> use-livecode at lists.runrev.com> wrote:
> >
> > I am using the "dgNumberOfRecords" mechanism to populate a grid.
> > Everything works as expected.
> >
> > except .....I need the last (new)  element to show up first and the first
> > element to show up last.
> >
> > this is normally achieved by sorting the column, but I cannot sort using
> > the "large dataset method".
> >
> > I really don't want to rewrite the array to reverse the sequence every
> time
> > a new record is added..... that will degrade performance as time goes on
> > big time......which is the very reason why i used this method for
> > populating the grid in the first place..... this grid can have 10,000
> items
> > in it after a months use.
> >
> > the other problem is that elements can also be deleted from the array so
> > the array indexes are not always perfectly sequential
> >
> > hmmm....
> >
> > any ideas are welcome. thank you.
>
>
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