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
