All of these example act consistently. I'll report back if I find what the
cause was and it is also post worthy. Thanks for bearing with me.
(i.2 2), (i.2 2){~ I.'z' = 'abcdf'
0 1
2 3
(i.2 2), (i.2 2){~ I.'b' = 'abcdf'
0 1
2 3
2 3
(i.2 2),(|:(0$0),:(0$0))
0 1
2 3
(<"0 i.2 2),(<'abc'),.(0$0)
On 14 January 2013 12:37, Raul Miller <rauldmil...@gmail.com> wrote:
> Long winded is, in this case, a warning. Here, you are doing
> unnecessary work because you are patching damage done by a bug without
> fixing the bug. In this context it might not seem like much but this
> can cause an ongoing chain of complications if you had it in
> production code.
>
> The 0 0 $ 0 value can be useful as a contant, but if it's being
> generated by code that code should be consistent with the rest of your
> code.
>
> Thanks,
>
> --
> Raul
>
> On Mon, Jan 14, 2013 at 5:40 AM, Steven Taylor <tayl...@gmail.com> wrote:
> > for want of a better verb name.
> >
> > Here's a long winded way of conditionally converting 0$0 to 0 0$0.
> >
> > empty=:(<'') = [: < [
> > reempty2=:13 : '>(empty x){x;0 0$0' f.
> > reempty3=:13 : '>(empty x){x;0 0 0$0' f.
> >
> >
> >
> >
> > On 14 January 2013 09:38, Steven Taylor <tayl...@gmail.com> wrote:
> >
> >> 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
> >>> >>
> ----------------------------------------------------------------------
> >>> >> For information about J forums see
> http://www.jsoftware.com/forums.htm
> >>> >>
> >>> >
> ----------------------------------------------------------------------
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> http://www.jsoftware.com/forums.htm
> >>> ----------------------------------------------------------------------
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> >>>
> >>
> >>
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
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>
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