On Thursday, April 9, 2015 at 9:28:54 AM UTC-6, Justin Zamora wrote: > Why not use streams? http://docs.racket-lang.org/reference/streams.html > > Justin > > On Apr 9, 2015 11:22 AM, "Jerry Jackson" <[email protected]> wrote: > Hello, > > > > I'm building a language with racket that includes lazy lists. I'm building > lazy lists with mcons cells. The compatibility/mlist module has lots of > support functions but I'd like to be able to apply racket functions to the > lists I've constructed and I don't see any "mapply". I understand that the > use of mutable cons cells is discouraged but I don't currently know of a > better way to do lazy lists. If there is a different recommended way, I'd > like to know about it. If not: > > > > 1) Is there an equivalent of mapply that I just haven't found or > > 2) Is there a reason it's a really bad idea or > > 3) Was it just left out because nobody so far needed it? > > > > Thanks for any help, > > > > --Jerry Jackson > > > > -- > > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > > For more options, visit https://groups.google.com/d/optout.
I can't use streams because I'm not just using traditional lazy lists; I'm constructing them from the multiple results of a goal-driven system with backtracking. The lazy lists are built via delimited continuations. Also, I'm supporting semi-greedy lists in that I want to fully populate shorter lists under some circumstances for performance so I generate the first N entries before suspending (unless the list is recursively specified which requires one-by-one semantics). -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
