[rules-users] Can I check if a collection contains one, and only one item of another collection

[David Cracauer]

Thanks for your response.

I don't think contains will work in this case.  I need to match if a  
collection contains one, and only one, of another collection.  So  
" ('a','b','c') contains one of ('a','b','e') " should not match,  
where "('a','b','c') contains ('a','2','3')" should match.

Thanks,
Dave Cracauer

On Aug 23, 2008, at 8:31 AM, Scott Burrows wrote:

> You have the answer in your example, reserved word "contains" will  
> give you that information.
>
> Scott Burrows
>
>
>
> On Sat, Aug 23, 2008 at 9:23 AM, David Cracauer <dcracauer at earthlink.net 
> > wrote:
>
> Hi,
> I'm getting stuck on this and I'm hoping someone can help..
> I need to be able to check that a collection contains one, and only  
> one item
> from another collection.
>
> Ideally, I would do something like this:
>
>  a:Answer(responses contains one of ("a","b","c"));
>
> Is there a way do do this without resorting to evals or predicate
> expressions? (drools 4.07)
>
> Thanks,
> Dave
>
>
>
> --
> View this message in context: http://www.nabble.com/Can-I-check-if-a-collection-contains-one%2C-and-only-one-item-of-another-collection-tp19114896p19114896.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
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