FindIndex question

[Mike Kerner]

i would be curious to know if an in-memory sqlite db increases scroll speed
with dg's.
basically, you would live load the dg with pages from the db.
i can't imagine that the dg is faster than the pg. everything i've tried
with the pg is faster than the dg.
just one more reason to resurrect the script compiler and release it.

On Mon, Mar 25, 2024 at 11:16 AM Bob Sneidar via use-livecode <
use-livecode at lists.runrev.com> wrote:

> I wrote a findInArray() function that will convert an array to a memory
> based SQL database, and one of the arguments is the SQL query statement to
> use on the database. I have another called FilterArray() which simply
> iterates through the keys to output those matching a criteria.
>
> Bob S
>
> > On Mar 24, 2024, at 2:22 PM, Neville Smythe via use-livecode <
> use-livecode at lists.runrev.com> wrote:
> >
> >
> >> On 25 Mar 2024, at 3:00 am,Mike Kerner wrote:
> >>
> >> i don't know if you dove into the code, but it's too early to think
> about
> >> unpacking this, so  here's the code: ...
> >
> > Thanks Mike
> >
> > While I was aware of the optional parameters feature of LC commands I
> have never used it I so was unfamiliar with the syntax. The penny had never
> dropped that the parameter list for a command is just an array, so
> evidently you can actually send an array instead of a comma delimited list
> >
> > Which means that you can send FindIndex a single parameter pKeyPairsA
> which is an array with alternating colName,searchStr values
> >
> > Setting up such an array is not particularly convenient for coding
> however. My workaround had been to use a custom function hack
> >
> > function myFindIndex pDataGrid, pKeyPairs
> >   — pKeyPairs is a comma delimited list such as
> “colname1,str1,colname2,str2,..”
> >
> >    replace comma with quote & comma & quote in pKeyPairs
> >    put “dispatch FindIndex to” && pDataGrid && “with” && quote &
> pKeyPairs & quote into tCommandStr
> >    do tCommandstr
> >   put the result into tFoundIndex
> >   ...
> >
> > A much more elegant (if probably no faster) solution is
> >
> > function myFindIndex pDataGrid, pKeyPairs
> >   — pKeyPairs is a comma delimited list such as
> “colname1,str1,colname2,str2,..”
> >
> >    set the columnDelimiter to comma
> >    split pKeyPairs by column
> >    dispatch “FindIndex" to pDataGrid with pKeyPairs
> >   put the result into tFoundIndex
> >   ...
> >
> >
> > BTW, where did you find the source code for DataGrid handlers? I now see
> how one could write a FindIndices function to return all indices rather
> than just the first found … or even a general WHERE  search :-)
> >
> > Neville Smythe
> >
> >
> >
> >
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