Re: [rules-users] Count matching facts

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