On 23 Oct 2013, at 17:43, Andy Fingerhut <andy.finger...@gmail.com> wrote:
> Paul, your function solve returns a set of solutions, but there is nothing on
> the program that seems to rely upon being able to quickly test whether a
> particular solution is in such a set. Returning a sequence from solve is
> much faster, since it avoids the PersistentHashSet hash collision issue
> entirely.
>
> Just replace #{#{}} with [#{}], and remove the call to 'set' in solve.
The problem with that, Andy, is that it will result in a lot of duplicates. For
the 4x4 problem, for example, that approach raises the size of the returned
collection from 8 to 384.
My guess is that for the 6x9 problem it will just remove the set handling
problem and replace it with a memory/time issue as the search space grows (and
I only have 16G in my MacBook Pro :-)
I don't need to get this working - I only knocked it together as an interesting
exercise. And if it's helped to track down an issue in the Clojure runtime,
it's already achieved far more than I expected it to :-)
Thanks again,
--
paul.butcher->msgCount++
Snetterton, Castle Combe, Cadwell Park...
Who says I have a one track mind?
http://www.paulbutcher.com/
LinkedIn: http://www.linkedin.com/in/paulbutcher
MSN: p...@paulbutcher.com
AIM: paulrabutcher
Skype: paulrabutcher
--
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
