[rules-users] rule with array

[Mark Proctor]

On 15/02/2012 18:36, shawn wrote:
> 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
> 			
> 		}
> 	}	
> }*/
I haven't tried it, but something like this might work from a pure rules 
perpsective:
$i : Object() from sPointer[]
$j : Object() from $i // I think this will instance of, checking it's a 
array and thus iterate over it
$p : Object( this == $j ) from aPointer

But as that is create a Rete evaluation tree, it won't be as efficient 
as a simple for loop. But would make an interesting test.

Mark
>
> 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?
>
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