I think the forum would be much more effective if more posts were explicit. 13 : . Then new uses could view any tacit impovements.
You wouldn't teach English speaking students Spanish by starting with the most complex Spanish sentences you can find. Also, since I still can't start a new thread, could you move this to a new thread? Linda a Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: Henry Rich <[email protected]> Date: 9/11/18 9:00 AM (GMT-05:00) To: [email protected] Subject: Re: [Jprogramming] Tacit form: How to handle intermediate When I first saw the question 'How would you make this tacit' my reaction was 'Why would you ever want to, since the explicit version is so easy to understand?' For practice, maybe. That's a good reason. But if you are trying to tune up your tacit forms, you really have to get over any aversion to @ . The equivalent to u@v is ([: u v)"v Not only is this butt-ugly, it is not recognized by the interpreter, so you miss out on all the fast code for things like <@v ;@:(<@v) etc. Henry Rich On 9/11/2018 5:15 AM, 'Mike Day' via Programming wrote: > NB. I've purged most of the earlier posts (below) > > Martin Kreuzer's original question was how to handle intermediate > results! > > Anyway, staying off topic for now, Ric's tongue-in-cheek proposal is > "explicit", > but perhaps you wanted something more so, Linda. > > He's got a point, though - would you like it reexpressed in COBOL? > > Meanwhile, this _might_ be along the lines you're thinking of: > > NB. Ric's tacit verb > pmt=: {: * 1&{ (([: (% <:) (^~ >:)) * ]) 1200 %~ {. > > NB. attempt to render it explicit... (explicate it?) > pmte =: 3 : 0 > 'r t b' =. y % 1200 1 1 > NB. OR: b =. {:y [ t =. 1{y [ r =: 1200%~ {:y NB.!!! > NB. (^~ >:) ===> > incrtot =. t^~1 + r > NB. OR: =. (1 + r)^t > NB. ([: (% <:) (^~ >:)) ===> incrtot % incrtot - 1 > NB. (([: (% <:) (^~ >:)) * ]) ===> (incrtot % incrtot - 1) * r > NB. whole thing ===> > b * (incrtot % incrtot - 1) * r > ) > > BTW, the fragment, incrtot % incrtot - 1, suggests a further refinement - > or is it? - dealing with an intermediate result, anyway! > incrtot % incrtot - 1 > 1 % 1 - 1 % incrtot > % 1 - % incrtot > -.&.% incrtot NB. too tacit? > > NB. Also, my antiallergenic tacit version avoiding @ and @: > pmtmd =: [: (*`(] * [: (% <:) (^~ >:))/) 1 1 1200 %~ |. > > 'r t b'=. 5.75 240 12500 > (pmt, pmte, pmtmd) r,t,b > 87.7604 87.7604 87.7604 > > FWIW! > > Mike > > > On 11/09/2018 07:58, Ric Sherlock wrote: >> Linda, >> You may want to define exactly what you mean by "explicitly" and what >> you're trying to show/achieve. >> Here is a tongue-in-cheek potential solution to your request: >> >> pmt=: 13 : '({: * 1&{ (([: (% <:) (^~ >:)) * ]) 1200 %~ {.) y' >> >> On Tue, Sep 11, 2018 at 2:21 PM Linda Alvord <[email protected]> >> wrote: >> >>> Now can someone, not Ric, write his version explicitly. >>> >>> PMT=: 13 : >>> Linda >>> >>> Sent from my Verizon, Samsung Galaxy smartphone >>> >>> >>> -------- Original message -------- >>> From: Ric Sherlock <[email protected]> >>> Date: 9/10/18 7:04 PM (GMT-05:00) >>> To: Programming JForum <[email protected]> >>> Subject: Re: [Jprogramming] Tacit form: How to handle intermediate >>> >>> Without @, but IMO this is a case where @ definitely improves >>> readability! >>> >>> pmt=: {: * 1&{ (([: (% <:) (^~ >:)) * ]) 1200 %~ {. >>> >>> >>> On Tue, Sep 11, 2018 at 7:06 AM Linda Alvord >>> <[email protected]> >>> wrote: >>> >>>> What if I'm allergic to @ ? >>>> >>>> Linda >>>> >>>> >>>> >>>> > [snipped the rest - Mike] > > --- > This email has been checked for viruses by Avast antivirus software. > https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.avast.com%2Fantivirus&data=02%7C01%7C%7C064974672be6431a25ce08d617e687bb%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636722676213014494&sdata=ofYcP0Uj7fLzjakYGxIugBnfK%2FAQwGdnMOFRkBtHzSY%3D&reserved=0 > > ---------------------------------------------------------------------- > For information about J forums see > https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jsoftware.com%2Fforums.htm&data=02%7C01%7C%7C064974672be6431a25ce08d617e687bb%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636722676213014494&sdata=vU8NYeNUjakzsUJsio%2FSY4KQEl40V6ivGFxhL4OGHZM%3D&reserved=0 --- This email has been checked for viruses by AVG. https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.avg.com&data=02%7C01%7C%7C064974672be6431a25ce08d617e687bb%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636722676213014494&sdata=9CNIyloRCZ2%2B6ZywaukhkhDw9DXg6hMQanBi1gSjXmw%3D&reserved=0 ---------------------------------------------------------------------- For information about J forums see https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jsoftware.com%2Fforums.htm&data=02%7C01%7C%7C064974672be6431a25ce08d617e687bb%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636722676213014494&sdata=vU8NYeNUjakzsUJsio%2FSY4KQEl40V6ivGFxhL4OGHZM%3D&reserved=0 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
