Welcome back indeed! What took you so long Dan? ;)
On Fri, May 3, 2019 at 11:10 AM Vijay Lulla wrote:
> Welcome back, Dan! Great to see you back on the forums after a long time!
> I have learned a lot from your emails and your code scripts...and I
> expect to learn more from your future eng
This verb might accomplish what you want,
process=. 4 : '(x ; (5!:1)<''y'')`:6'"0
*: ` -: `^ process 3 1 0
9 0.5 1
*: ` -: `^ process i.3 5
0 1 4 9 16
2.5 33.5 4 4.5
22026.5 59874.1 162755 442413 1.2026e6
I there a tacit (verb) count
there is this:
names ''
IFJ6 IFQT
names added by:
searchvar =: 3 : 0 nms {::~ :: (''"_) 1 i.~ > (
wrote:
(This probably shows my ignorance,) but if y is a variable then y points to
some values. I’d like to know “the pointer” rather than "the values”. I
very/extremely vaguely under
adverb trains need parenthesizing of adverbs (outer parens below are
superfluous, but prove anonymity)
*: ` -: `^ (/.("1)(&.|:)) i.3 5
On Friday, May 3, 2019, 2:54:21 a.m. EDT, Piet de Jong
wrote:
Thanks for looking at this. The problem (or maybe I misunderstand) with this
solution
Adding to Raul's solution, it can be simplified a little by removing the excess
]'s
pad =: (1&$:) : ((0,.~0,.0,~0,]) ^:[ )
pad i. 3 4
0 0 0 0 0 0
0 0 1 2 3 0
0 4 5 6 7 0
0 8 9 10 11 0
0 0 0 0 0 0
> On May 3, 2019, at 9:37 AM, Raul Miller wrote:
>
> pad =: (1&$:@]) : ((0,.~0,.
pad =: (1&$:@]) : ((0,.~0,.0,~0,]) ^:[ ])
Thanks,
--
Raul
On Fri, May 3, 2019 at 12:35 PM Brian Schott wrote:
>
> How do I create the verb `pad` below so that the first and the last
> expressions below produce the same result?
>
>pad =: (1&$:@]) : (0,.~0,.0,~0,]) ^:[ ]
>$ 1 pad i.
How do I create the verb `pad` below so that the first and the last
expressions below produce the same result?
pad =: (1&$:@]) : (0,.~0,.0,~0,]) ^:[ ]
$ 1 pad i. 3 4
5 6
$ 2 pad i. 3 4
7 8
$ pad i. 3 4
3 4 25 26
--
(B=)
--
For repeating items, you can reshape the short argument so it matches
the long argument.
FYI,
--
Raul
On Fri, May 3, 2019 at 5:04 AM Ric Sherlock wrote:
>
> I think /.~ works fine until there are repeated items. So
>g=: *:`-:`^
>c=: /.~
>g c 3 1 0 3 NB. probably not the desired r
Welcome back, Dan! Great to see you back on the forums after a long time!
I have learned a lot from your emails and your code scripts...and I
expect to learn more from your future engagement.
Cordially,
Vijay.
On Fri, May 3, 2019 at 9:55 AM jjj . wrote:
> I haven't read this whole thread, so
I haven't read this whole thread, so apologies if this has already been
covered, but many many moons ago I wrote a util to do this:
https://code.jsoftware.com/wiki/User:Dan_Bron/Snippets/DOOG
g=. *: ` -: `^
y=. 3 1 0
g Across y
9 0.5 1
It's more general than that, but Across wa
The list of names is finite, and accessible with reflection tools. That is,
ultimately, "inverse" of ". is ". and the inverse of ~ is ~ (both of these
statements are wrong, the latter wronger than the former).
Seeing as you're using "variable", I'll take it you're only interested in
"reverse-e
Based on what Henry says, this means J cannot distinguish between:
var=. i.3
'var' -: v var
and
'var' -: v i.3
If you are willing to live with false positives, you could do something
ridiculous like this:
nl 0
+---+-+++--+
|BASEDSK|DBGFL|DEBUGSTARTUP|IFJ6|ISW
I like the solution
c=: 1 : ',/ y u/. ~i.# y’
Seems to work fine.Except for where the gerund is something like
g=.(+/)`(-/)
It appears that in this case rank information is required as in
g=.(+/“1)`(-/“1)
> On 3 May 2019, at 9:24 pm, R.E. Boss wrote:
>
> What about
>
> c=: 1 : ',/ y
A noun is replaced by its value before the sentence is executed.
Henry Rich
On 5/3/2019 8:28 AM, Piet de Jong wrote:
(This probably shows my ignorance,) but if y is a variable then y points to some
values. I’d like to know “the pointer” rather than "the values”.I
very/extremely vaguely
(This probably shows my ignorance,) but if y is a variable then y points to
some values. I’d like to know “the pointer” rather than "the values”.I
very/extremely vaguely understand these things work on stacks with the y values
loaded on a stack before v gets to act on them. That is why pe
Impossible - v never sees y, only its value.
Henry Rich
On 5/3/2019 6:58 AM, Piet de Jong wrote:
If m is the name (ie string) of a variable then ‘m'~ is the value of the
variable.
Is there an “inverse" to this?
That is I want a verb v (or adverb or conjunction) so that if y is a variable
th
Yes, I want v (or adverb or conjunction) such that
‘var’-: v var
is 1. Similar to
var -: “. ‘var’
being 1.So in a sense I want the inverse of “. (“undo” ?)
> On 3 May 2019, at 9:42 pm, Louis de Forcrand wrote:
>
> If you mean a textual representation of the array y, check ": .
>
If you mean a textual representation of the array y, check ": .
Otherwise if you want something like this
var=: i.3
'var' -: v var
1
then I doubt that such a v exists.
Cheers,
Louis
> On 3 May 2019, at 12:58, Piet de Jong wrote:
>
> If m is the name (ie string) of a variable then ‘m'~ i
This subject regularly pops up every now and then, and it reminds me of
something I wrote a little while back that might interest you. I found a couple
of errors in them (oops) so I’m copying them here in hope that they are of help
to you. They aren’t pretty or succinct but they work. (Code at b
What about
c=: 1 : ',/ y u/. ~i.# y'
*:`-:`^ c 3 2 1 0 3 2 1
9 1 2.7182818 0 1.5 7.3890561 1
It is one of the repeating questions in this forum and IIRC this solution was
provided by Dan Bron (pity he is less active on this forum then he used to be).
R.E. Boss
> -Oorspronkelijk berich
If m is the name (ie string) of a variable then ‘m'~ is the value of the
variable.
Is there an “inverse" to this?
That is I want a verb v (or adverb or conjunction) so that if y is a variable
then
v y
is the name (ie string) of the variable.
This thread
http://www.jsoftware.com/pipermail/programming/2009-August/015981.html
suggests that there isn't an obvious elegant way to do this. Especially if
you want a dyadic solution.
For me the take home result was the following verb which ended up in my
utility box which I find more elegant th
Thanks for pointing the problem with repeated items.
“respectively” (I looked at the code) appears to be a long complicated
explicitly defined conjunction. I was hoping for something succinct and
elegant that I could add to my bag of tricks (and understanding).
> On 3 May 2019, at 7:04 pm,
I think /.~ works fine until there are repeated items. So
g=: *:`-:`^
c=: /.~
g c 3 1 0 3 NB. probably not the desired result
9 9
0.5 0
1 0
Using respectively works ok and also allows for dyadic verb use in the
gerund.
c2=: respectively ]
g c2 3 1 0 3
9 0.5 1 9
g c2 i. 3 4
0 1
*:`-:`^/.~ 3 5$ 2 4
4 16 4 16 4
4 16 4 16 4
2 1 2 1 2
0 0 0 0 0
Is not what you want, I presume.
R.E. Boss
> -Oorspronkelijk bericht-
> Van: Programming
> Namens Piet de Jong
> Verzonden: vrijdag 3 mei 2019 10:16
> Aan: Programming forum
> Onderwerp: Re: [Jprogramming] Appl
Following all the suggestions, the following seems to get close
g=. *: ` -: `^
c=. /.~
g c i.3 4
0 2 4 6
2 2.5 3 3.5
16 18 20 22
$ g c i.3 4
3 1 4
The only annoying thing are the final dimensions, fixed up with ,”2
> On 3 May 2019, at 5:04 pm, Piet de Jong wrote:
>
> c=:((128!:2)&.
c=:((128!:2)&.><)”0
seems to work great. Will have to work out exactly why it works — don’t
understand the why the rank 0 boxing makes things happen the right way.
> On 3 May 2019, at 2:32 pm, Gilles Kirouac wrote:
>
> or (not as simple)
>
> c=: (128!:2)&.><
>
> g c"0 y
>
> ┌─┬───┬─┐
>
Yes, a little tricky due to gerund binding with oblique.
If you really want a “c” for now (someone else may suggest a tacit way
overnight) you can use explicit as here;
c=: 4 : '(x/."1 &. |:)y’
g=. *: ` -: `^
y=. 3 1 0
] yy=.3 2$2#yy
3 3
1 1
0 0
g c y
9 0.5 1
g c yy
9 9
0.5
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