That is a good question because, depending on the shape of its argument, the product of the determinant u .v might be independent on how v is defined or even if v is defined ( ( .v) alone is an adverb if v is a verb),
require 3 : 0 fls=. Loaded_j_ -.~ getscripts_j_ y if. # fls do. load fls else. empty'' end. ) |. .require _1 _1 erase'v' 1 v |value error: v |. .v _1 _1 |. .require _1 0 1 2 3 3 2 1 0 _1 |. .v _1 0 1 2 3 3 2 1 0 _1 |. .require i.2 3 |domain error: require | |. .require i.2 3 |. .v i.2 3 |value error: v | |. .v i.2 3 J is very clever and this seems to be a case of a call-by-need. On Mon, Aug 13, 2018 at 1:03 AM, More Rice <mrmorer...@gmail.com> wrote: > Oh, sorry. My bad - I had a typo (.b instead of b.) in those “bad > instances." Please ignore my previous email. > > what is .b in this context? > > thanks. > > > Maurice > > > On Aug 13, 2018, at 12:36 AM, More Rice <mrmorer...@gmail.com> wrote: > > > > ref: https://code.jsoftware.com/wiki/Vocabulary/Inverses > > > > When I do v .b _1, I was expecting to see something close to the table > on the page. > > > > Things went well for most, but then, at some point, v return value seem > to change for reason I cannot explain. > > > > For example, |. b. _1 gives me |. (initially), and then changed to _1 > after tried other sentences. When that happens, other v (like +) gives me > _1 as well. It persists across jqt restart and account logout. > > > > |. .b _1 > > _1 > > > > Then, after running some sentences, it may return back to normal again. > > > > Is v b. _1 stable? > > > > thank you. > > > > > > Maurice > > > > Engine: j806/j64/darwin > > Release: commercial/2017-11-06T10:20:33 > > Library: 8.06.09 > > Qt IDE: 1.6.2s/5.6.3 > > Platform: Darwin 64 > > Installer: J806 install > > > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
