Using the "or" operator with filter

[Peter Haworth]

If I remember correctly, there are some significant improvements in the
pipeline for the filter command - head over to the engine forum fro details.

Pete
lcSQL Software <http://www.lcsql.com>


On Thu, Jul 11, 2013 at 10:50 AM, Roger Eller
<roger.e.eller at sealedair.com>wrote:

> Thanks Richard.
>
> To give a better picture of the requirements, the gCodes will be read from
> a user editable preference file (.txt), so there could easily be 3 or more
> (or less) items that have to be examined for each line of tList (a report
> file).
>
> At the moment, it works for the hard-coded 3 gCodes. That's why I tried
> "or" in hopes of filtering them all in a single pass. I'm going to build a
> smarter repeat that can adjust to the  number of items in gCodes.
>
> ~Roger
>
>
> On Thu, Jul 11, 2013 at 1:18 PM, Richard Gaskin wrote:
>
> > Roger Eller wrote:
> >
> >>
> >> Perhaps I should just loop through each line checking if it 'contains'
> one
> >> of the codes instead?
> >>
> >
> > I would do that.
> >
> > Regex is handy at times, but it's a complex subsystem and notoriously
> slow
> > with complex operators.
> >
> > I'll bet if you can first run a filter against the left-most column, a
> > "repeat for each" on the remainder would likely be about as fast as you
> can
> > get.
> >
> > Sometimes "repeat for each" on the whole thing is faster than "filter".
> >
> > --
> >  Richard Gaskin
> >  Fourth World
> >  LiveCode training and consulting: http://www.fourthworld.com
> >  Webzine for LiveCode developers: http://www.LiveCodeJournal.com
> >  Follow me on Twitter:  http://twitter.com/**FourthWorldSys<
> http://twitter.com/FourthWorldSys>
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