http://code.jsoftware.com/wiki/Articles/J_--_a_Glimpse_of_Heaven#J:_is_it_a_professional_tool.3F
This subsection has ben carried over unchanged from the APL sister article. It refers to significant projects where APL has been used. APL -- *not* J. If anybody can quote comparable instances of J in action with well-known clients, I'd be most grateful. Feel free to edit the Jwiki page yourself. On Sat, May 26, 2018 at 8:34 PM, Ian Clark <[email protected]> wrote: > …sorry, the link should have been: http://code.jsoftware. > com/wiki/Articles/J_--_a_Glimpse_of_Heaven > > On Sat, May 26, 2018 at 8:30 PM, Ian Clark <[email protected]> wrote: > >> David has alerted me to a serious bungle of mine in this article, and >> especially the subsection: >> >> http://code.jsoftware.com/wiki/Articles/APL_--_a_Glimpse_of_ >> Heaven#Indexing >> >> I was under the false impression I'd carefully tested all the code >> samples. But, late at night, in my haste to publish this article and finish >> the task, I seem to have omitted this important step. At least, I did for >> this subsection, and maybe elsewhere too. >> >> I have since corrected the omission in #Indexing (which all involved >> Index Origin: 0 versus 1), and checked that the J code executes and gives >> the results shown. >> >> I would however beg readers to alert me to any places in the article, and >> its APL sister page in Jwiki, where the J code blocks do not run true. ALSO >> THE APL – since I have come across errors/typos there too. >> >> You may pm me, or post on this forum, ideally on this thread, or on the >> Programming forum, since it entails the correct functioning of J code. >> >> Being sure that the APL is correct is of fundamental importance. Any >> corrections to the results in the APL version will prompt correction to the >> J version too, since I've been at pains to formulate my J translation to >> compute the same figures. >> >> NB also the disclaimer I've added to the head of this article, in its J >> version. >> >> Ian Clark >> >> On Sat, May 26, 2018 at 11:47 AM, David Lambert <[email protected]> >> wrote: >> >>> Do you trust me to fix the index origin trouble? The entire indexing >>> section needs revist. Thank you. I will start recommending this page on >>> the forums where I sell j. >>> >>> In:http://code.jsoftware.com/wiki/Articles/APL_-_a_Glimpse_of_Heaven >>> >>> >>> Indexing >>> >>> Returning to our vector of numbers:Val=: 22 37 41 19 54 11 34 >>> >>> In order to extract the fourth item, we write4{Val >>> >>> >>> ............... >>> >>> >>> >>> Val =: (300 77 111) 3 5 1}Val >>> Val >>> *111*37*300*19*77*11 34 >>> >>> >>> ................ >>> >>> >>> Val =: (300 77 111) 3 5 1}Val >>> Val >>> *111*37*300*19*77*11 34 >>> >>> It is often necessary to extract the first items from a list of values, >>> for example the first 5. Nothing could be easier: >>> >>> 1 2 3 4 5 {Val >>> 111 37 300 19 77 >>> >>> >>> On 05/26/2018 12:38 AM, [email protected] wrote: >>> >>>> Date: Sat, 26 May 2018 05:38:39 +0100 >>>> From: Ian Clark<[email protected]> >>>> To:[email protected] >>>> Subject: [Jchat] A Glimpse Of Heaven, by Bernard Legrand >>>> Message-ID: >>>> <[email protected] >>>> ail.com> >>>> Content-Type: text/plain; charset="UTF-8" >>>> >>>> Way back in 2008 Chris Burke drew attention to an article in Vector >>>> 23/1 by >>>> Bernard Legrand, translated by Sylvia Camacho, entitled *APL – a >>>> Glimpse of >>>> Heaven.* >>>> This was first presented at a conference of 22 June 2006, organized by >>>> AFAPL: *Association Francophone pour la promotion du langage APL.* >>>> It was an unashamedly evangelistic appeal to the "diplodocus >>>> generation" of >>>> C/C++ programmers to take APL seriously as a professional language. >>>> In:http://code.jsoftware.com/wiki/Articles/APL_-_a_Glimpse_of_Heaven >>>> Chris conjectured that the article would need only minor changes to >>>> offer J >>>> in place of APL. He offered it as an "interesting exercise for the >>>> beginner". >>>> >>>> However the challenge was never taken up… until now. >>>> >>>> Ladies and Gentlemen, it gives me great pleasure to present to the >>>> world: >>>> >>>> http://code.jsoftware.com/wiki/Articles/J_--_a_Glimpse_of_Heaven >>>> by Bernard Legrand, >>>> translated by Sylvia Camacho and done into J by yours-truly. >>>> >>> >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >>> >> >> > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
