yeah, I have thought about it. But if I use function, I have to write three for loops. like: /*function Boolean findSubject(Request request) { Pointer sPointer = request.getSubjectPath(); Pointer aPointer = request.getAuthorTable(); for( int i = 0; i < p.length; i++ ) { for( int j = 0; j < p[i].length; j++) { for( Iterator iter = aPointer.iterator(); iter.hasNext(); ) // if..else } } }*/ sPointer is a int[][]; aPointer is a ArrayList. I need to find which element in aPointer has the same value in sPointer. If I use function, I think it the efficiency is not so good. Do you have any other ideas? -- View this message in context: http://drools.46999.n3.nabble.com/rule-with-array-tp3747680p3747895.html Sent from the Drools: User forum mailing list archive at Nabble.com.

Thanks~~ -- View this message in context: http://drools.46999.n3.nabble.com/rule-with-array-tp3747680p3752097.html Sent from the Drools: User forum mailing list archive at Nabble.com.

On 15/02/2012, shawn <youngxiao121(a)hotmail.com&gt; wrote: This is almost certainly not a good idea. Apart from not being able to write a pattern for int[] you'd have to deal with the inserted arrays, and the efficiency isn't improved by this at all. If you don't see a triple nested loop in your code then this doesn't mean that it isn't there. It seems to me that the type of Request could be improved upon. -W