[rules-users] Iterating two collection in LHS

[Edson Tirelli]

   You should really insert your males and females into your working memory
instead of having them as nested lists only. Anyway:

rule "unlucky male"
where
    $c : City()
    $m : Male( $age : age ) from $c.maleList
    not( Female( age ==$age ) from $c.femaleList )
then
     // $m is unlucky, no female with the same age
end

   []s
   Edson


2009/2/2 techy <techluver007 at gmail.com>

>
> Hello,
>
> Please help me to implement following rule in drool. I could not find a way
> to iterate two collection using accumulate or collect in LHS.
>
> public Male{
>  int age;
>  //other fields
>
> }
>
> public Female{
>  int age;
>  //other fields
>
> }
> public City{
>
>  private List<Male>  maleList;
>  private List<Female> femaleList;
>
> }
>
> #Rule to get all Male whose age != any of female's
> rule "Get Unlucky Male"
> when
>        city : City()
>        maleList : ArrayList() from collect ( Male( his age = any of
> Female's age  from city.femaleList  ) from city.maleList)
> //consequence
> end
> --
> View this message in context:
> http://www.nabble.com/Iterating-two-collection-in-LHS-tp21796713p21796713.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
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-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com
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