Hi all, it's definitely this one:
"Changes in Version 7.0, 1993 11 14", as the date correponds to the release date of the sources zip file. I have a tutorial from from Harvey Davies, "Introduction to J" from December 1994, apparently for J *Release* 2. Thanks to everyone for their answers. Best Regatds, /Alexander Am 15. Mai 2022 19:08:39 MESZ schrieb Raul Miller <rauldmil...@gmail.com>: >Er... I guess I should keep in mind that there's two very different >meanings for "J version 7" > >My response was about J 7.01: >https://www.jsoftware.com/docs/archive/release/contents.htm > >Belatedly, I'm remembering that there was an early J version 7: > >https://www.jsoftware.com/docs/archive/release/status.htm#v7.0 > >The jargon here is that the newer one was called "J release 7". > >I had abandoned that distinction -- we use the release number as a >version number. > >But, there was some recent mailing list discussion here which did >mention that older version... > >That said, technically, these "J release X" versions might all be >thought of as releases of J version 7, and the original J version 7 >was release 1 of this version... But I wasn't thinking that deeply, >and in this context, for me, this way of using those words was more of >a coincidence than a deliberate naming choice. > >That said, the biggest changes between J release 1 of J version 7 and >J release 7 (of J version 7) are the change of implicit argument names >(from x. to x, from y. to y, and so on...). > >Anyways... > >The right answer here would probably be: check the release notes at some point. > >(As an aside, ... personally, I first learned J on a version which >preceded version 7.) > >Thanks, > >-- >Raul > >On Sun, May 15, 2022 at 10:22 AM <neit...@gaertner.de> wrote: >> >> Alexander Shendi asked: >> > >> > My question is: Can I use this implementation for learning J? >> >> I cannot agree with Raul this time. >> >> For learning any language, you need to have proper reference >> documentation. I guess it would be very difficult these to get >> a (legal) copy of the J Version 7 "Dictionary of J" these days. >> >> > Basically, what is the difference between J7 and "modern" J903? >> >> Obvious major differences: >> >> - no control structures (but the $. Suite instruction vector >> instead) >> - a few less primitives (e.g. {::, L:, p:, q:) >> >> These differences are the easy ones because they are immediatetly >> noticed. You'll get a "spelling error", adjust your vocabulary, and >> live moves on. >> >> The tricky changes are those where J was defined to operate differently, >> but not always in obvious ways. For example, in both Jv7 and today's J: >> >> *: 0 1 2 3 >> 0 1 4 9 >> >> <@*: 0 1 2 3 >> >> Today's result: >> +-+-+-+-+ >> |0|1|4|9| >> +-+-+-+-+ >> >> But J Version 7: >> +-------+ >> |0 1 4 9| >> +-------+ >> >> Any newbie would be bound to think: "OK, *: Square works the same, >> but something about @ Atop or < Box changed." But that's not the >> case. The change actually *is* with *: Square. >> >> It's simply not viable to take today's documentation, ignore "anything >> not there yet" in the old version, and learn the language. It'll >> be a very frustrating exercise because things WON'T work as exepcted. >> >> To get back to your question: >> >> > Basically, what is the difference between J7 and "modern" J903? >> >> The differences are all summarized in the "status.txt" file and, >> for more recent releases, in the "release notes". Enter here: >> >> https://code.jsoftware.com/wiki/System/ReleaseNotes >> >> and work you way down towards the past (or at least J Version 7). >> The changed behaviour described above is listed in there. But I have >> my doubts that a newbie would be able to pin-point it. >> >> (Hidden exercise, if you have half an hour to spare.) >> >> Martin Neizel >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >---------------------------------------------------------------------- >For information about J forums see http://www.jsoftware.com/forums.htm -- Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
