thanks for the 0 0$0 comment idea.
the bit that caught me was where an empty take comes back as 0 $ 0 from
take. The sequence was a little like this.
(i.2 2),~ 0$0{i.6 2
0 0
0 1
2 3
Just trying to keep it as tacit as possible. i.e. 0$0 could be a list of
zero or more indices.
On 13 January 2013 21:23, Raul Miller <rauldmil...@gmail.com> wrote:
> Note that (0 0$0), i. 2 2 would also work. The trailing dimension
> gets expanded, just like in your original case, so the net result is
> equivalent to (0 2$0,i. 2 2 which is to say nothing happens.
>
> But, depending on your situation, 0 0 $ 0 might be more generally
> useful than 0 2 $ 0.
>
> FYI,
>
> --
> Raul
>
> p.s. sorry about the hijacking
>
> On Sun, Jan 13, 2013 at 4:05 PM, Steven Taylor <tayl...@gmail.com> wrote:
> > I think the email thread got hijacked... but a follow up to the original
> > join question...
> >
> > Roger pointed out that I wasn't being logical (i.e. appending rank 1 to
> > rank 2 doesn't make sense).
> >
> > ... and if I do this, I now get back what I expected to see.
> >
> > (0 2$0), i.2 2
> > 0 1
> > 2 3
> >
> > So... I borrowed the idea of q's "reshape" and implemented it in J as a
> > helper verb. So far, it seems to be doing the trick.
> >
> > thanks for the comments and help.
> >
> >
> > On 13 January 2013 02:19, Raul Miller <rauldmil...@gmail.com> wrote:
> >
> >> On Sat, Jan 12, 2013 at 8:50 PM, Linda Alvord <lindaalv...@verizon.net>
> >> wrote:
> >> > As long as the ranks agree, u&v y -> u v y
> >> >
> >> > Would this be useful as a definition of compose?
> >>
> >> That is the definition for the monadic case but is incomplete since it
> >> does not mention the dyadic case.
> >>
> >> But note also that the dictionary's vocabulary is a reference work and
> >> it has already stated that the ranks must agree. Keep in mind that
> >> the dictionary also includes material such as
> >> http://www.jsoftware.com/help/dictionary/samp13.htm
> >>
> >> FYI,
> >>
> >> --
> >> Raul
> >> ----------------------------------------------------------------------
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> >>
> > ----------------------------------------------------------------------
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