[racket] static variables question

Hi Rodolfo,

Thanks for the suggestion.  I ended up reading quite a bit about generators
and found this very appropriate and interesting page:
http://matthias.benkard.de/journal/116.

-Joe

On Sun, Feb 19, 2012 at 7:05 PM, Rodolfo Carvalho <rhcarvalho at gmail.com>wrote:

> On Mon, Feb 20, 2012 at 00:55, Joe Gilray <jgilray at gmail.com> wrote:
>
>> Hi Rodolfo,
>>
>> Thanks for the suggestions.  Your re-factoring (no pun intended) of the
>> conds really cleaned things up.  Much appreciated.
>>
>> About the unnecessary loops, good point, I simply changed to starting
>> with end set to 10 instead of 1000 and I think that helps a lot.  I know
>> that there are other gross inefficiencies as well (for example, if
>> primes-from-to gets called to just add a few primes to the list it is very
>> slow as it goes through the whole list.  A better implementation would
>> "know" that the values on storedlst are already checked and skip checking
>> them.
>>
>
>
> Maybe you could generate the list of primes using... hmm.. Generators!
>
> http://docs.racket-lang.org/reference/Generators.html
>
> You could have something like (primes-up-to n) yield one prime at a time,
> up to n (the number to be factored).
>
>
> []'s
>
> Rodolfo Carvalho
>
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