I think Win Carus wrote: > Ernest's approach reduces matching time substantially and does make it > possible in a realistic time to compute the $2.00 change combinations > using a version of your script modified as he suggest. > > However ... the "generate-and-test" approach is still very > memory-intensive and a still-better alternative would be to use the CCP > approach implemented by Futtersack and Labat > (http://www.droit.univ-paris5.fr/futtersack/english/research/CCP/). > Although the approach discussed refers only to a CLIPS implementation, > Jess code is also available for download. The basic idea behind CCP is > to assert facts only as needed; and backtrack only to sensible > alternative search paths. This can reduce memory use substantially and > make some problems possible to solve (or possible to solve in reasonable > times). >
Thanks, Win, for bringing this up again. Professor Futtersack used to be a frequent correspondent in Jess's early days. Mr. Carus has suggested to me recently that a form of CCP might gainfully be integrated into Jess; this is on my teetering stack of worthwhile things to investigate. I think this would be a Really Good Thing. --------------------------------------------------------- Ernest Friedman-Hill Distributed Systems Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 PO Box 969, MS 9012 [EMAIL PROTECTED] Livermore, CA 94550 http://herzberg.ca.sandia.gov -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------