Re: [rules-users] Count matching facts

Not really... all solutions are variations of this. :( We do intent to develop things equivalent to SQL group by, unique, etc clauses... but no such feature today. []s Edson 2008/1/29, cfili <cfilippelli(a)cerner.com&gt;: > > > Yeah I tried your first suggestion and ran into the duplication. I'd > rather > not create a new fact for each one of these... any other way of avoiding > it? > > > Edson Tirelli-3 wrote: > > > > Sorry, my previous suggestion will count the same process name > multiple > > times. There are a few ways to avoid it. I would probably use a helper > > fact: > > > > rule XYZ > > when > > $p : Process( $name : name ) > > not( ProcessCount( name == $name ) ) > > Number( $count : intValue) from accumulate( > > $i : Process( name == $name, this != $p ), > > count( $i ) ) > > then > > System.out.println( "There are "+$count+" instances of processes > > named "+$name ); > > insert( new ProcessCount( $name, $count ) ); > > end > > > > > > Hope it helps, > > Edson > > > > 2008/1/29, Edson Tirelli <tirelli(a)post.com&gt;: > >> > >> > >> Try that: > >> > >> rule XYZ > >> when > >> $p : Process( $name : name ) > >> Number( $count : intValue) from accumulate( > >> $i : Process( name == $name, this != $p ), > >> count( $i ) ) > >> then > >> System.out.println( "There are "+$count+" instances of processes > named > >> "+$name ); > >> end > >> > >> []s > >> Edson > >> > >> > >> 2008/1/29, cfili <cfilippelli(a)cerner.com&gt;: > >> > > >> > > >> > I am having a hard time finding an example of what I am trying to > do, > >> so > >> > maybe someone here could help me. What I am trying to do is > determine > >> > how > >> > many facts fall into the same category. > >> > > >> > My facts are 'processes' and one of their attributes is a 'name'. > My > >> > goal > >> > is to determine how many processes with the same name are > running. The > >> > problem is I do not know ahead of time the process names available, > I > >> > want > >> > to determine that set at runtime. Also, once I determine the count > for > >> > a > >> > given name, I do not want to run it again for the other processes > that > >> > fall > >> > in that name category. > >> > > >> > I think "from collect" is probably what I want to use here, but I am > >> not > >> > sure how to grab the names in my Pattern from the fact I am > currently > >> > iterating on. > >> > > >> > Thanks. > >> > -- > >> > View this message in context: > >> > http://www.nabble.com/Count-matching-facts-tp15160392p15160392.html > >> > Sent from the drools - user mailing list archive at Nabble.com. > >> > > >> > _______________________________________________ > >> > rules-users mailing list > >> > rules-users(a)lists.jboss.org > >> > https://lists.jboss.org/mailman/listinfo/rules-users > >> > > >> > >> > >> > >> -- > >> Edson Tirelli > >> JBoss Drools Core Development > >> Office: +55 11 3529-6000 > >> Mobile: +55 11 9287-5646 > >> JBoss, a division of Red Hat @ www.jboss.com > > > > > > > > > > -- > > Edson Tirelli > > JBoss Drools Core Development > > Office: +55 11 3529-6000 > > Mobile: +55 11 9287-5646 > > JBoss, a division of Red Hat @ www.jboss.com > > > > _______________________________________________ > > rules-users mailing list > > rules-users(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > -- > View this message in context: > http://www.nabble.com/Count-matching-facts-tp15160392p15163614.html > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli JBoss Drools Core Development Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users