The last sentence is Compare the behaviour of @ with that of @: . They differ only in the ranks of the verbs that they produce.
and in the definiion for @: it said @: is equivalent to @ except that ranks are infinite. AFAIK the wordings for definitions of @ and @: remained more or less the same ever since 1993. Вс, 03 янв 2016, Matthew Baulch написал(а): > http://code.jsoftware.com/wiki/Vocabulary/at mentions this rank situation, > as Henry pointed out. > > http://www.jsoftware.com/help/dictionary/d620.htm does not appear to. > The last sentence in the page you mentioned should already had > said something about the ranks. Did you miss it? > > Вс, 03 янв 2016, Matthew Baulch написал(а): > > (0, 1) Thanks for your kind words. It does seem a very supportive and > > knowledgeable community. > > > > (3) This makes sense now. Thanks too for pointing me to NuVoc. It seems an > > improvement in some respects, though it appears not to be distributed with > > J. > > > > (4) I particularly enjoy the terseness of the original Voc., and its > > availability offline. Perhaps a static copy of NuVoc could be distributed > > with J, and the original Voc. could include a warning about its > > obsolescence? > > > > I'd love to see J thrive in the future. It seems the case with all > > software, whether programming language or not, that documentation very > > important. J's is very good. This is the only shortcoming I can see. > > > > Matt > > On 3 Jan 2016 1:11 pm, "Henry Rich" <[email protected]> wrote: > > > > > 0. Welcome to J! > > > > > > 1. If you are able to get that far entirely on your own, my hat is off > to > > > you. You're a J natural, and I think you'll enjoy the language. > > > > > > 2. Your analysis is brilliant, though not quite perfect. rv must mean, > > > not the right rank of v, but instead the rank of a result-cell of v. > And > > > even then, the equivalence would not be exact, because of changes to > > > result-cells when they are assembled into the overall result of v. > > > > > > 3. The best resource for learning J is NuVoc. It fills in the gaps in > > > the Dictionary, corrects errors like this one, and has tutorial > > > information. For u@v, see > > > > > > http://code.jsoftware.com/wiki/Vocabulary/at > > > > > > 4. The Dictionary is not actively maintained. Don't expect an update. > > > But NuVoc is a Wiki, so do what you can to improve it! > > > > > > Henry Rich > > > > > > > > > > > > On 1/2/2016 8:59 PM, Matthew Baulch wrote: > > > > > >> The equivalence (from the voc. page for @) > > >> > > >> x u@v y ↔ u x v y > > >> > > >> only seems to apply in some cases. For instance, with > > >> > > >> x =: 1 2 3 4 > > >> y =: 5 6 7 8 > > >> u =: */ > > >> v =: + > > >> > > >> this is most certainly false. After exploring a number of cases, > > >> it seems likely that > > >> > > >> x u@v y ↔ u"rv x v y > > >> > > >> where rv is the right rank of v. Is this true in all cases? > > >> If so, I'd be grateful if the dictionary could be updated accordingly. > > >> > > >> Matt Baulch > > >> ---------------------------------------------------------------------- > > >> 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 > > -- > regards, > ==================================================== > GPG key 1024D/4434BAB3 2008-08-24 > gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 > gpg --keyserver subkeys.pgp.net --armor --export 4434BAB3 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 gpg --keyserver subkeys.pgp.net --armor --export 4434BAB3 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
