Filtering one list out of another

Mark Schonewille m.schonewille at economy-x-talk.com
Mon Dec 23 18:08:37 EST 2013


Hi Devin,

Filter, intersect and union won't work for this. I have never understood 
why there isn't something like a negative intersect, e.g. an exclude 
command.

I think you will have to use repeat for each.

--
Best regards,

Mark Schonewille

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On 12/23/2013 23:57, Devin Asay wrote:
> Hello LiveCode savants,
>
> I'm pretty sure this can be done, but I've puzzled over this for a while and my brain asplode.
>
> I have two lists of integers:
>
> A B
> -- --
> 1 2
> 2 5
> 3 7
> 4 8
> 5
> 6
> 7
> 8
> 9
> 10
>
> I want to get only the lines in list A that are not in list B:
>
> Result desired:
> --------------------
> 1
> 3
> 4
> 6
> 9
> 10
>
> Will filter work for this? I already tried, without much hope of success, 'filter A without B'. As expected, no go.
>
> Any ideas?
>
> Devin





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