I like the "levels of a tree" idea as it is a good graphic metaphor for
nested arrays. My only quibble is calling a vector of simple atoms level 1
rather than 0.
On Wed, Jan 20, 2021 at 12:07 AM Hauke Rehr wrote:
> I’m stuck. I tried wrapping up my thoughts and failed.
> Now I’ll just leave it
I’m stuck. I tried wrapping up my thoughts and failed.
Now I’ll just leave it as the stub it is.
Thanks, Raul,
my first reaction was:
Why would anyone talk about them differently?
(an ignorant/arrogant reaction)
Then I thought
Looks like I just bought into everything I read when learning J.
… a
I'll see what I can do.
Henry Rich
On 1/19/2021 9:22 PM, Ric Sherlock wrote:
In a similar vein,
The first line of a multi-line definition doesn't respect indentation, so:
mutate=: {{idxmut=. I. x >: (*/$y) ?@$ 0
(populate idxmut) idxmut"_} y
}}
mutate
4 : 0
idxmut=. I. x >: (*/$y) ?@
I had not spent enough time in nuvoc to notice this "atom is not an
array" distinction.
Even now, looking at https://code.jsoftware.com/wiki/Vocabulary/AET#,
this distinction does not really leap out at me.
Still... it might be useful to have a word for the thing which an
array with no dimensions
I had also taken a look when you first wrote,
found some places where I would have too rapidly
uttered disagreement and so kept quiet, waiting
for things to develop.
In the meantime I thought about translating the
contents of the presentation I used when teaching
J to pupils in order to show the a
In a similar vein,
The first line of a multi-line definition doesn't respect indentation, so:
mutate=: {{idxmut=. I. x >: (*/$y) ?@$ 0
(populate idxmut) idxmut"_} y
}}
mutate
4 : 0
idxmut=. I. x >: (*/$y) ?@$ 0
(populate idxmut) idxmut"_} y
)
mutate=: {{ idxmut=. I. x >: (*/$y) ?@$ 0
He's not using level to explain boxing: he's using it to represent
multidimensional unboxed arrays. I think that's a great idea, because
it makes the frame easier to think about than using a physical
representation of the data as a cube or table etc.
Arnab: this may be a problem later, becaus
Hi Arnab,
where you are using a tree metaphor to explain boxing, if you label the
simple vector as having depth 0, rather than 1, it would line up with the
result of the level verb (L.), e.g.
L. i. 3
0
L. 1 2;3 4;5 6
1
Regards,
Devon
On Tue, Jan 19, 2021 at 8:56 PM HH PackRat wrote:
> O
On 1/19/21, Arnab Chakraborty wrote:
> Anyway, I have dumped a few more draft pages (
> https://arnabc74.github.io/jsoft/)
The hotlink to nonlin11.html should be nonlin1.html to avoid a 404 error.
Harvey
--
For information a
Starting with the next beta JE will remove excess trailing blanks at the
end, leaving just one space.
Henry Rich
On 1/19/2021 1:18 PM, John Baker wrote:
Direct definition has added another, more convenient way to define local J
words
on the fly. It is particularly useful for creating verbs, ad
My attempt to preserve the user's original spacing misfired. I'll see
what I can do.
Henry Rich
On 1/19/2021 1:18 PM, John Baker wrote:
Direct definition has added another, more convenient way to define local J
words
on the fly. It is particularly useful for creating verbs, adverbs and
conjun
Direct definition has added another, more convenient way to define local J
words
on the fly. It is particularly useful for creating verbs, adverbs and
conjunctions
within explicit definitions.
However there are gotchas. One thing I've noticed is the repeated addition
of a
trailing blank to DDs wit
I wrote these to time insertion speed. The first one is scalar, second one
performs multiple inserts at once.
insertToVec=: 4 : 0
'idx vec'=. y
assert. 1=#idx
assert. 1=#x
assert. (idx>:_1)*.(idx<:#vec) NB. Insert new item: _1->at end,
0->before start
biv=. (0) idx}1$~(#vec)+#idx
insertbefore=:{{
'a b'=. y
(x{.b),a,x}.b
}}
insertafter=: {{ (x+1) insertbefore y }}
2 insertafter "1 [ 10;"1 n
0 1 2 10 3 4
5 6 7 10 8 9
FYI,
--
Raul
On Tue, Jan 19, 2021 at 11:51 AM Skip Cave wrote:
>
> How does one design a verb that inserts specific elements into a vector or
> ma
How does one design a verb that inserts specific elements into a vector or
matrix?
For example, an "insertafter" verb would take one left argument, which is
the index of the array that the element is to be inserted after. The right
argument would be two boxed nouns. The first boxed noun is the set
LGTM.
On Tue, 19 Jan 2021 at 14:40, Arnab Chakraborty wrote:
>
> Thanks to everybody for the thumbs up.
> I would feel honoured to be able to contribute to the jsoftware site. But I
> guess that things need to be tidied up a bit (or a lot?) on my end, before
> being ready for uploading to your ma
Thanks to everybody for the thumbs up.
I would feel honoured to be able to contribute to the jsoftware site. But I
guess that things need to be tidied up a bit (or a lot?) on my end, before
being ready for uploading to your main site.
Anyway, I have dumped a few more draft pages (
https://arnabc74
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