On Mon, Mar 19, 2012 at 09:18:29AM -0700, Matt Welland wrote: > On Mon, Mar 19, 2012 at 5:55 AM, Alan Post > <[1][email protected]> wrote: > > On Thu, Mar 15, 2012 at 01:38:19AM +0100, Thomas Chust wrote: > > On Wed, 2012-03-14 at 18:23 -0600, Alan Post wrote: > > > [...] > > > * (pretty-print (let ((s (amb 0 1 2))) (amb-collect s))) > > > [...] > > > produces: > > > [...] > > > * (0) > > > [...] > > > > Hello, > > > > to me this behaviour looks correct. amb-collect is supposed to collect > > all the different values its argument can take on, but in your example > s > > is not an ambivalent expression -- the fact that s is bound to a value > > produced by amb only makes the let expression ambivalent. > > > > To phrase it more technically: Every amb-collect creates a new dynamic > > scope for backtracking. Any ambivalence introduced in that dynamic > scope > > will be resolved and the results will be collected but any outer > dynamic > > scope will not be affected. > > > > Thomas, John, > > Thank you both very much. *I did manage to start properly using the > amb egg, and completed a one-off homework assignment: > > > [2]https://github.com/alanpost/permaculture-design-course/blob/master/guild/README > > amb is very neat. *I'll likely throw larger datasets and more > interesting constraints at it as I continue to explore this > problem space. > > Wow, another permaculturist on the chicken scheme list, what is the > probability of that? I got my design certification just over a year ago. > Nice work on the guild design! Do you have further plans for the code? > * >
Ossum! I'm inclined to agree with Jorg and say it's because it's *Chicken* Scheme. >_> I do have further plans for the code. I'm taking a 7-weekend course, with 2 weeknds left. I won't be working on it again until I finish the course, which happens at the end of April. I'm not sure in which direction I'll go first: it really depends on which problem in front of me I have the best data on. This project convinced me that I needed to start compiling and collecting such data: the constraint exploration was the finishing touch and my playground, and the more data I have the more options I have to play with. A local-to-me ecologist is interested in sitting down and brainstorming, I hope something interesting comes of that. -Alan -- .i ma'a lo bradi cu penmi gi'e du _______________________________________________ Chicken-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/chicken-users
