[rules-users] from accumulate($somevar)?

[Esteban Aliverti]

I don't know If I understood well, but did you try this?

when
 $xs : ArrayList() from collect(X())
 $total : Number() from accumulate(X($c: count), sum($c))

The accumulate will iterate over all the X and calculate the sum.

Best,

On Fri, May 21, 2010 at 2:12 PM, ljnelson <ljnelson at gmail.com> wrote:

>
> I have a rule that needs to make use of the accumulate() function.
>
> It also needs the value of the first argument to the accumulate() function.
>
> Suppose there are 5 Xs in working memory, each with "count" fields.
>
> I need--in my consequence--access to (a) the list of 5 Xs, and (b) the
> result of the accumulate function having worked on them (in my case it's
> really just a simple sum, so accumulate(X($count : count), sum($count))).
>
> Naively, I tried this, having a strong and accurate supposition that it
> wasn't going to work:
>
> when
>  $xs : ArrayList() from collect(X())
>  $total : Number() from accumulate($xs, sum(count))
>
> At any rate, I hope that helps convey what I need.  My consequence needs
> the
> list of Xs the accumulate function worked on, as well as the result of the
> accumulate function (the Number).  What's the best way to accomplish this?
>
> Thanks in advance,
> Laird
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Esteban Aliverti
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