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Published on Mar 16, 2012
This bonus screencast shows how you can pass an array by reference to Rules, thereby allowing the changes Rules makes to the array to have effect outside Rules. As seen in the screencast, this does not work perfectly, but it may still be good to know about this.
Note: When entities are passed to Rules by events, the entity is normally saved afterwards -- taking care of any changes. Thus, no pass-by-reference is required.