As humans we share that flaw/strength. :-) It allows us to chunk information into understandable bites which we name, but f. helps out.
cheers, bob > On Apr 17, 2017, at 2:22 PM, Michael Goodrich <[email protected]> > wrote: > > Thanks Bob that was very helpful as I was guilty of the mnemonic sin! > > > > Sent from my iPhone > >> On Apr 17, 2017, at 5:20 PM, 'Pascal Jasmin' via Programming >> <[email protected]> wrote: >> >> You can copy beta to a new directory and run each independently. >> >> >> >> >> >> ________________________________ >> From: Michael Goodrich <[email protected]> >> To: [email protected] >> Sent: Monday, April 17, 2017 5:14 PM >> Subject: Re: [Jprogramming] J weirdness #2 - A nasty surprise >> >> >> >> This is getting interesting; I was already impressed with Js speed being >> only twice as slow as the C version, and faster than the R version of the >> same code. >> >> Looking forward to that 806 beta 3! >> >> Btw I should uninstall the latest (stable) and start afresh? >> >> >> Sent from my iPhone >> >>> On Apr 17, 2017, at 5:03 PM, Raul Miller <[email protected]> wrote: >>> >>> I think you were surprised by >>> http://www.jsoftware.com/help/dictionary/special.htm >>> >>> Specifically the special handling for +/ .* (which is handled at >>> parsing time rather than at execution time - the way you have things >>> arranged, the parser will not see +/ .* and hypothetically you could >>> arrange for sum .* in contexts where sum was defined differently). >>> >>> I hope this helps, >>> >>> -- >>> Raul >>> >>> >>> On Mon, Apr 17, 2017 at 4:51 PM, Michael Goodrich >>> <[email protected]> wrote: >>>> Greetings: >>>> >>>> Got a nasty surprise today. have a non-trivial J app with the following >>>> supporting original definitions: >>>> >>>> sum =. +/ >>>> dot =. +/ . * >>>> sqrd =. *: >>>> ssq =. +/ @: sqrd >>>> >>>> >>>> Which I changed (thinking I was being elegant) to >>>> >>>> sum =. +/ >>>> dot =. sum . * >>>> sqrd =. *: >>>> ssq =. sum @: sqrd >>>> >>>> After this change the run time increased by a factor of 5! >>>> >>>> Insights? >>>> ---------------------------------------------------------------------- >>>> 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 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
