Re: [rules-users] Comparing Objects of same class.
Let S be the (nonempty) set of all students and d the length
of the span of days. There exists a student s0 so that s0.doj
is the minimum over all S. Then accumulate and count students
x over S so that s0.doj <= x.doj and x.doj < s0.doj + d. If this
count exceeds the threshold t: display the students. Finally,
remove all students y from S where y.doj = s0.doj.
Repeat until S is empty.
I don't see any particular reason for doing this in Drools,
although it's feasible with just a handful of rules. But it is
a ridiculously simply exercise in Java.
Does this have any practical value? Students' behaviour is
notoriously erratic. Is this for a brand new branch of
behavioural psychology?!
-W
On 17/06/2014, naresh.t <nareshthota005(a)gmail.com> wrote:
Hi,
more details...
lets take a rule like If any 5 students joined in 5 days of span...
No Name DOJ
1 A *5/24*
2 B * 5/25*
3 C *5/27*
4 D *5/23*
5 E 5/30
6 F 5/20
7 G 5/15
If we take, A,B,C and D details, these 4 students are joined in <=5 days of
span(lowest date :->D:5/23 and highest date :->c:5/27 --> diff is 4 days).
If any other student joined in these <=5 days (5/23 to 5/27 ) then we need
those all 5 students details.
If we take F, A, B and D, these 4 students also joined in <= 5 days...but
no.of 5 students condition is missing.
As we said we are able to work on static rules like if student joined
<=5/23
& !>=5/30 etc.
Thanks & Regards
Naresh
--
View this message in context:
http://drools.46999.n3.nabble.com/Comparing-Objects-of-same-class-tp40300...
Sent from the Drools: User forum mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users