Thanks. Pointing to the error messages was helpful. Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Ian Clark
Sent: Tuesday, July 08, 2014 8:52 AM
To: programm...@jsoftware.com
Subject: Re: [Jprogramm
Ok, I see now. It's just using ammend. It was there in nuvoc the whole time.
Not sure how I missed that.
Thanks.
--- Original Message ---
From: "'Pascal Jasmin' via Programming"
Sent: July 9, 2014 11:52 AM
To: programm...@jsoftware.com
Subject: Re: [Jprogramming] Modifying single element of Li
(<'fish') 2} ;: 'cat dog fiosh cow monkey'
┌───┬───┬┬───┬──┐
│cat│dog│fish│cow│monkey│
└───┴───┴┴───┴──┘
5 (4 5 6}) 3 1 4 1 7 9 2 6 5
3 1 4 1 5 5 5 6 5
From: Jon Hough
To: "programm...@jsoftware.com"
Sent: Tuesday, July 8, 2014 10:
]arr =. 3 1 4 1 7 9 2 6 5
3 1 4 1 7 9 2 6 5
5 (<4) } arr
3 1 4 1 5 9 2 6 5
On Tuesday, July 8, 2014, Jon Hough wrote:
>
> I want to modify an element of a list, leaving other elements unchanged.
>
> e.g.
>
>
>
>list =. ;: 'cat dog fiosh cow monkey'
>
>
> list
>
>
> ┌───┬───┬─┬───
I want to modify an element of a list, leaving other elements unchanged.
e.g.
list =. ;: 'cat dog fiosh cow monkey'
list
┌───┬───┬─┬───┬──┐
│cat│dog│fiosh│cow│monkey│
└───┴───┴─┴───┴──┘
I want to change 'fiosh' to 'fish', e.g. change a spelling mistake. It wou
You may send Chris am email to request repos write access.
I checked libflann 1.7 is available on Raspberry Pi (jessie).
Вт, 08 июл 2014, jprogramming написал(а):
> The Debian and Ubuntu builds for 1.7.x both dump core for me, so I'm assuming
> the 1.7 API is very different (though at a glance,
The Debian and Ubuntu builds for 1.7.x both dump core for me, so I'm assuming
the 1.7 API is very different (though at a glance, it doesn't look real
different; perhaps it is the flannparam struct). I would imagine they'll get
around to using 1.8.4, as even that version is over a year and a half
Now that's interesting! Now I've got my study material for the evening. :)
-Dan
PS: I just ran my amend-frequency analysis on my own code: it comes it #45
among all primitives, and #4 among adverbs, though with a separated by
long interval from #3 (\).
- Original Message ---
S
One thing I find fascinating with J is that it forces you to put the
operations in logical order. At least that's how I feel. If I have three
pieces of information to do something with I think a little more, do
something with two pieces, then use the result to include another piece.
When I firs
Dan wrote:
> I rarely find a call for } . I'm wondering if you've
> [Pepe] have invented or discovered generally beneficial
> uses of } unrelated to performance.
Pascal responded:
> I think } (dyadic amend) is pretty essential.
> The obvious use is amending one (or sublist) item
>
J avoids a pitfall in scalar language amend by replacement. It verifies
that the replacement won't crash half-way through leaving the data
corrupted. It is transparent to the program whether the amend amends in
place or not, other than performance. And sometimes amend makes more sense
than other wa
In most languages indexed replacement is indexed replacement? In J and
in most functional languages it is not? You get a brand new variable?
So, why give the user the flawed impression he can still do indexed
replacement and do amendments to variables/nouns? And at the same time
in tacit code w
I think it would be impossible to do an amendment in place in tacit code,
but amendment should still work in a tacit expression, just not in place.
But if the result were assigned back to the original variable what will
happen? Would the tacit expression prevent it from recognizing the
operation as
Erling wrote: "It's obviously not possible to do any amendments in tacit
code?" Adding after wards: "A principle of functional programming is you
never modify a variable?"
From my perspective those (rhetorical?) questions are separate. Regarding
the first question, consider the verb (v) that p
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
1.01978
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
1.02001
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
1.01747
Arch Linux. AMD Athlon II X4 640 3 GHz.
On 2014-07-08 22:11, Danylo Lizanets wrote:
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!
Dan, ultimately, I find difficult to agree, or disagree, with the statement:
"
x m} y is used in J much less than you would think, considering the
importance of in-place array modification in other languages.
"
Who is "you"? Which are the "other languages"? In what sense is the
phrase "used in J"
Here I get:
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
2.34528
64-bit Windows 8.1, Intel Core i5-3337u
J 802
2014-07-08 22:11 GMT+02:00 Danylo Lizanets :
> x=: 1e6 $ ' '
>
> y=: a. {~ ? 1e6 $ 256
>
> %/ 100 (6!:2)&> '/:~x' ; '/:~y'
>
> 2.07821
>
> 64-bit Ubuntu Linux,
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
2.07821
64-bit Ubuntu Linux, Intel Core i5-2450M
On Tue, Jul 8, 2014 at 2:30 AM, Nollaig MacKenzie wrote:
> Intense PC (64 bit Intel core i7) j701/2011-01-10/11:25
>
> 1.43 - 1.45
>
> Mac Mini OS X 10.9.3
>
> 1.11 - 1.18
>
There have been a few minor adjustments to the schedule and some talk
titles have been added or adjusted.
--
For information about J forums see http://www.jsoftware.com/forums.htm
Thanks, Joe. I see that there is actually a live demo under "qtdemo" at
~addons/ide/qt/demo/websocket.htm. I need to come up to speed with more
basic socket stuff for now.
On Tue, Jul 8, 2014 at 11:35 AM, Joe Bogner wrote:
> Have you seen http://www.jsoftware.com/jwiki/Guides/JqtWebsocket ?
Only libflann 1.7 can be installed in debian. Perhaps you can
also provide a flann.ijs for version 1.7 for testing.
Also the offset for 32-bit and 64-bit most probably are different.
Пн, 07 июл 2014, jprogramming написал(а):
> I've finally got a kd-tree library I'm comfortable with wired up t
Have you seen http://www.jsoftware.com/jwiki/Guides/JqtWebsocket ?
There is also a lab/demo of a websocket based repl.
I have played with it but havent applied it to anything new.
On Jul 8, 2014 11:26 AM, "Devon McCormick" wrote:
> I'm trying to do something too simple to really need websockets
I'm trying to do something too simple to really need websockets but thought
I'd ask. I am trying to go through the "sockets" lab but running into an
undefined name "toserver".
On Tue, Jul 8, 2014 at 10:38 AM, Eric Iverson
wrote:
> I have looked a bit at websockets.They are going to be an impor
I have looked a bit at websockets.They are going to be an important
new technology (not so new, but slow to be adopted). They add stateful
socket connections to the internet (which mostly uses stateless http
connections).
I looked at adding them to JHS and decided they added complication
without m
I have done a fair bit of work with websockets and not-J. A websocket
server needs to be aware of extensions to HTTP that are used to
establish the socket; Unfortunately, our J web server has no such
facility.
On Tue, Jul 8, 2014 at 8:41 AM, Devon McCormick wrote:
> Hi -
>
> has anyone done anyt
@Linda - the "domain error" is because you've defined h as:
h=: 3 :'0 x } y'
That should have been
h=: 4 :'0 x } y'
if you're going to call h dyadically.
But I sympathize. Exactly this error catches me out all too often.
Particularly when I've been using "13 :"
If I was awarding the prize for th
It struck me as "It looks like a duck, it quacks like a duck, but it isn’t a
duck."
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Raul Miller
Sent: Tuesday, July 08, 2014 5:52 AM
To: programm...@jso
Hi -
has anyone done anything with J and websockets?
Thanks,
Devon
--
Devon McCormick, CFA
--
For information about J forums see http://www.jsoftware.com/forums.htm
I'm comparing it to the post below it that says it is a verb. It struck me as
a peculiar inconsistency.''
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Raul Miller
Sent: Tuesday, July 08, 2014 5:52
4 5(3 (4 5"_)} ] )10+i.10
10 11 12 13 3 3 16 17 18 19
4 5(3 ([)} ] )10+i.10
10 11 12 3 14 15 16 17 18 19
/Erling
On 2014-07-08 11:21, Linda Alvord wrote:
And then!
h=: 3 :'0 x } y'
4 5 h i.11
|domain error: h
| 4 5 h i.11
Linda
-Original Message-
From: programming-
I think we have covered these issues with you before. Do you remember
why you should get that error?
Thanks,
--
Raul
On 7/8/14, Linda Alvord wrote:
> And then!
>
> h=: 3 :'0 x } y'
>4 5 h i.11
> |domain error: h
> | 4 5 h i.11
>
> Linda
>
> -Original Message-
> From: program
And then!
h=: 3 :'0 x } y'
4 5 h i.11
|domain error: h
| 4 5 h i.11
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On BehalSSf Of Linda Alvord
Sent: Tuesday, July 08, 2014 5:14 AM
To: programm...@jso
Ian's post was very early in this thread, but something has puzzled me for a
while as I tried to write a tacit version:
f=: 13 :'0 x } y'
4 5 f i.11
0 1 2 3 0 0 6 7 8 9 10
g=: 4 :'0 x } y'
4 5 g i.11
0 1 2 3 0 0 6 7 8 9 10
f
4 : '0 x } y'
g
4 : '0 x } y'
4!:0 <'f'
3
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