I was thinking that also, but #@q: leads into some of the other stuff he's doing.
Thanks, -- Raul On Tue, Sep 1, 2015 at 2:04 PM, Marc Simpson <m...@0branch.com> wrote: > Very neat Michal. > > Re: primality checks, you may find 1&p: more suitable. Efficiency > gains on this machine, > > timespacex '(1=#@q:) 1+i.1e7' > 14.7121 4.19433e8 > timespacex '1 p: 1+i.1e7' > 3.10132 2.85214e8 > > Best, > Marc > > On Tue, Sep 1, 2015 at 3:56 PM, Raul Miller <rauldmil...@gmail.com> wrote: >> Here's another copy of that particular essay: >> >> http://www.jsoftware.com/papers/play132.htm >> >> That said, picking up the book can certainly have some advantages. >> >> Thanks, >> >> -- >> Raul >> >> >> On Tue, Sep 1, 2015 at 2:35 AM, Rob Hodgkinson <rhodg...@me.com> wrote: >>> Very nice work Michael, well presented and interesting !! >>> >>> Did you also see Eugene McDonnell’s essays on ‘volutes’ (spirals) in At >>> Play With J (around page 85). >>> Also here … "At Play With J (Edn 2)” paperback >>> <https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB4QFjAAahUKEwj_8fTtm9XHAhUnJKYKHbCgAHY&url=http://www.jsoftware.com/jwiki/At%2520Play%2520With%2520J&ei=8UblVb-1CafImAWwwYKwBw&usg=AFQjCNHOakLes8gaM40T8nrbCX92Brp8cQ> >>> >>> >>> Note that Joey Tuttle (and Roger Hui) contributed a lot of ideas and a >>> solution to Eugene also, but I think your derivation is actually very >>> elegant !!! >>> >>> (so I copied Joey to verify)…/Regards Rob >>> >>> >>>> On 1 Sep 2015, at 1:09 pm, Michal Wallace <michal.wall...@gmail.com> wrote: >>>> >>>> Hey all, >>>> >>>> I made a 15 minute video about a line of J code I wrote a while back: >>>> >>>> https://www.youtube.com/watch?v=dBC5vnwf6Zw >>>> >>>> -Michal >>>> ---------------------------------------------------------------------- >>>> For information about J forums see http://www.jsoftware.com/forums.htm >>> >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
