to run on windows,
wrapper.py lines to change are:
binpath = "D:/j64-804/bin"
self.libj = get_libj(binpath + "/j.dll")
kernel.json change:
'python3' to 'python'
if installing python through anaconda, here is my path for putting the kernel
files,
D:\Users\Pascal\Anaconda3\share\jupyter\kernel
Note that there is a cover for 128!:2
apply
128!:2
in terms of modifying "., in my opinion, a more useful interpretation of a
boxed parameters would be locales, and ". would operate within the locale list
provided:
A poorly chosen definition in profile,
do
".
What makes it a poor decis
http://www.jsoftware.com/forums.htm
< (1 0 ; 0 1)
- Original Message -----
From: Pascal Jasmin
To: Programming Forum
Sent: Wednesday, February 17, 2016 11:40 AM
Subject: [Jprogramming] an inverse to oblique
http://www.jsoftware.com/forums.htm
--
For information abo
k
> the original question is easier more flexible. I can't think of a better
> way than to generate indexes,
>
> (< 0 0) ,&< (1 0 ; 0 1)
>
>
>
>
> - Original Message -
> From: Pascal Jasmin
> To: Programming Forum
> Sent: Wednesday,
The reason I asked, was to make this seemingly useful adverb that lends well to
J patterns. The pattern is applying a verb 8 distinct directions across a
table (rows cols 2 diagonals front and back)
unoblique =: 4 : ' (;y) (; x)} (x $ 0)'
eightdirs =: 1 : '[: |:@:(|."1) $ unoblique [: u&.|.
how I approached that problem when I last
implemented something vaguely similar...
Thanks,
--
Raul
On Wed, Feb 17, 2016 at 6:24 PM, Pascal Jasmin wrote:
> The reason I asked, was to make this seemingly useful adverb that lends well
> to J patterns. The pattern is applying a verb
They are .so files on android, and maybe located elsewhere (openssl libraries
are anyway). A C api is easier for J to call than C++.
- Original Message -
From: Robert Herman
To: programm...@jsoftware.com
Sent: Saturday, February 20, 2016 10:15 AM
Subject: [Jprogramming] Qt dlls in th
I too expected what you did, but found the behaviour to be what it is.
Everyone before us, perhaps found the same. Its not a crazy implementation.
A better example of a surprise is with 4 items. But the root of all of this
lies in what to do with 2 items.
+`*/3 4 5 2
31
+`*`-/3 4
nice... maybe small cleanup,
".@; every ([,(<'+'),])`([,(<'*'),])/&.|.each ": each each<\. 1 2 3 4 5 6 7
There is this way too,
(< +`*) (|.each@:|.@:($~ each 1 >. <:) 4 : 'x/ y' every <\.@]) 1 2 3 4 5 6 7
209 209 207 69 65 13 7
- Original Message -
From: Brian Schott
To: Programmin
.6 1.7 0.3 9 _5 _1 7
Step-by-step:
1%2-3%4-5%6-7
0.6
2-3%4-5%6-7
1.7
3%4-5%6-7
0.3
4-5%6-7
9
5%6-7
_5
6-7
_1
7
7
Skip Cave
Cave Consulting LLC
On Tue, Feb 23, 2016 at 6:27 PM, Pascal Jasmin wrote:
> nice... maybe small cleanup,
>
> ".@; ever
#x27; every <\.@]) ]
> fn =: <@|.@[ (|.each@:|.@:($~ each 1 >. i.@#) 4 : 'x/ y' every <\.@]) ]
>
> On Tue, Feb 23, 2016 at 10:51 PM, Pascal Jasmin
> wrote:
>
> > fn =: <@|.@[ (|.each@:|.@:($~ each 1 >. <:) 4 : 'x/ y' every <\.@
this is good,
_1 ". '44x'
44
_ ". '44'
44
_ ". '3 '
3
problem1
_ ". '44x'
_
problem2
0 ". ' '
(empty)
workarounds,
notanumber =: _1&([ = [ ". 'x' ,~ dltb@])
--
For information about J forums see http://www.jsoftw
a couple of implementations I have posted before for u/ when x items and
initial y are of different shape.
reduce =: 1 : '<"_1@[ ([: u (&.>)/(>@:) ,) <@:]'
reducE =: 1 : (':'; 'o=. y for_i. x do. o =. i u o end.')
reducE is explicit, and left to right. reduce boxes each side, and uses the
same
But wouldn't timings involving reduce-with-fill depend on how much
fill needs to get generated?
Thanks,
On Thu, Feb 25, 2016 at 4:51 PM, Pascal Jasmin wrote:
> a couple of implementations I have posted before for u/ when x items and
> initial y are of different shape.
>
> re
two of
the four timings can be meaningfully compared.
--
Raul
On Thu, Feb 25, 2016 at 5:49 PM, Pascal Jasmin wrote:
>> 5 timespacex ' +/ (i. 25 4), 1 2 3 4'
>> 0.0200582 2.51692e7
>> 5 timespacex '(i. 25 2) + reduceS 1 2 3 4'
>> 0.0205952
You may already know that you can define your own inverses. Verbs have them.
Not modifiers. But you can make a verb from a common modifier use. example:
cut1 =: <;.1 :. ;
(,~ -@:(+/))each&.cut1 0 1 1 1 0 1 0 1 1
_3 0 1 1 1 _1 0 1 _2 0 1 1
for cut_1, we can't really know an inverse for th
sorry if this has been answered already,
>@(~.@[ ; each
To: programm...@jsoftware.com
Sent: Friday, March 4, 2016 4:34 AM
Subject: Re: [Jprogramming] J Challenge
I don't think for a minute that this will be the most terse or most elegant but
this is what I got:
animals =:
'bird';'cow';'cow';'
an alternate pm
pm =: 1 : '(% +./)@((u/@:* |.) , */@])"1'
From: Louis de Forcrand
To: programm...@jsoftware.com
Sent: Sunday, March 6, 2016 12:31 PM
Subject: [Jprogramming] Fractions challenge
Try to write a verb or adverb(s) that can add, subtract, multiply
moving around the m term to be the "searched". There's probably a better
version that doesn't box.
ritem =: 1 : '(m -:"_ _1 ]) >@:({"0 1) (,&<~"_ _1)'
(2 4 $ 0) (16+i.2 4) ritem i. 3 2 4
- Original Message -
From: Kip Murray
To: "programm...@jsoftware.com"
Sent: Wednesday, March 9
This idea has a lot of promise. Converting to and from C structures would be
big, though C doesn't have (AFAIK) a heterogeneous array format, and some
standard representation for a dictionary would be needed. C JSON libraries all
seem to do something different.
The missing structure in C is
A feature that is a lot bigger than it looks, and something I think is a bug:
For modifiers that return modifiers, errors are generated when a modifier train
is saved (used as a name) or parenthesized
+ - (1 : '`u') `:6
+ -
+ - (((1 : '`u')) (`:6))
|syntax error
This error is overcommab
a0 =: "_
a1 =:(`{.)(`{:)(@.1 0 2)
From: Jose Mario Quintana
To: Programming forum
Sent: Sunday, March 13, 2016 10:59 PM
Subject: [Jprogramming] Adverbial Tacit Jym
Welcome to the Adverbial (and Conjunctional) Tacit Jymnasium :)
Orthodox and wicked routines
Yes that is it.
>I think it's confusing because
X (a0 a1)
in this case is not the same as
(X a0) a1
and not the same as (the implied parentheses created that usually work):
X a0 a1
The workarounds are to use a linear representation of the adverb train and
another adverb that combines
except
X (a0 a1)
(X a0) a1
X a0 a1
are all normally equivalent (unless a0 returns a modifier). In which case it
returns syntax error for first expression, even though 3rd expression is both
intuitive and likely intent (2nd expression equivalent to 3rd).
Btw a1 can return a modifier without
We haven't explicitly mentioned it, but to be clear, the point of (a a) is to
save an adverb train to a name for application later.
I wasn't around when (c a) or (a c) was a thing, but if it was supposed to be
equivalent to (u c v) a and u a (c v) then these can be implemented with double
adve
not seen Pascal's solution for a1...
7
6
5
4
3
2
1
0
Produce a1 without involving @. in the code.
Remember: "Spoiler alerts by instructors and patrons will be appreciated."
On Mon, Mar 14, 2016 at 3:43 PM, wrote:
> Pascal Jasmin wrote:
> > a0 =:
> > a1 =:
>
y) was passed, as the argument, to a. Furthermore, the interpreter
> (mistakenly) allowed to pass adverbs and conjunctions to the adverb a
> (again, if I recall correctly).
>
> On Wed, Mar 16, 2016 at 11:21 AM, Pascal Jasmin
> wrote:
>
>> Could someone remind me what
>
. This would allow for both orthodox and (indirectly) wicked
complete conjunctional programming (one could write the pro-adverb conj
the counterpart the Tacit Toolkit pro-adverb adv.
Thomas,
That would be my request, bring back those two tridents.
On Wed, Mar 16, 2016 at 1:12 PM, Pascal Jasmi
Could someone remind me what
(a c) and (c a) used to do as trains? (in J5)
was (c c) ever allowed?
(sorry this is difficult to search)
- Original Message -
From: "neit...@gaertner.de"
To: programm...@jsoftware.com
Sent: Wednesday, March 16, 2016 10:12 AM
Subject: Re: [Jprogramming
spoiler answer at bottom,
- Original Message -
From: Jose Mario Quintana
To: Programming forum
Sent: Thursday, March 17, 2016 7:00 PM
Subject: Re: [Jprogramming] Adverbial Tacit Jym
Let us add another twist, courtesy of David Lambert, to the Exercise 1:
Produce a variant of a1, say
to make a slightly off topic reply, this will crash J (win 64) (using the
definitions in replied post)
vr =: ($:@v0)
recursive2=: vr`v1@.v2
recursive i.20
I can accept that I am using $: wrong, but if vr is defined as what appears to
be equivalent:
vr =: $:@v0
then recursive2 -: recursive (
There is a non recursive solution to your example problem which distracts from
addressing the ^: transformation part
(-. 0 -.~ ~.@:,@:(}:@divisors"0)) i.20
0 10 11 12 13 14 15 16 17 18 19
Your question is good. I've explored similar thoughts. I have several
tools/tricks which could be improv
They fail.
This library uses openssl bindings (available on all platforms and ships with
recent Js)
https://github.com/Pascal-J/BN-openssl-bindings-for-J
I don't remember if I implemented all boolean functions but it's
straightforward to define any missing ones using one as template.
The ot
stack size of
windows jqt.exe should had already increased since this February.
Сб, 19 мар 2016, Pascal Jasmin написал(а):
> to make a slightly off topic reply, this will crash J (win 64) (using the
> definitions in replied post)
>
>
> vr =: ($:@v0)
> recursive2=: vr`v1@.v2
&
Can't think of a reason why we wouldn't want this in the official interpreter
- Original Message -
From: Jose Mario Quintana
To: Programming forum
Sent: Monday, March 21, 2016 9:54 AM
Subject: Re: [Jprogramming] Tail recursion (bug hijack)
Right, I never saw or found a satisfactory c
Is there a link to the source code behind ctrl-K. I think the last time
someone complained about it having a bug, the feature was removed for 4 months
:P
It appears as though the bug would be in what should be a relatively short bit
of code?
- Original Message -
From: Henry Rich
T
;>> determine automatically if it is. Jx is not for the faint of heart and
>>> will stay there but I am not sure about J Unbox or the official
>>> interpreter.
>>>
>>> On Mon, Mar 21, 2016 at 6:21 PM, Pascal Jasmin
>>> wrote:
>>>
>>
(2 : (':'; '(u@:[)^: (v y) 1')) *
--- 2 Dyad ---
2
(2 = sideff__) (2 : (':'; '(u@:[)^: (v y) 1')) *
1
--
3 : 'a=: +/ y'
1
1
==
0
==
0
On W
, 2014 at 11:26 AM, Pascal Jasmin wrote:
> I see the problem with guard now. Its related to dyadic ^: having a weird
> static optimization by doing (x&u)
>
> so even though guard asks for (u@:[) it passes the 1 at the far end of guard.
> Basically the u side of ^: is always
its the magic of each or & and &. as a dyad, which has a fork like expansion of
(v x) u v y.
some distracting workarounds include:
'=:' splitstring "1 'a=:b',:'c=:d'
┌─┬─┐
│a│b│
├─┼─┤
│c│d│
└─┴─┘
or
(<'=:') splitstring S:1 ;: each 'a=:b';'c=:d'
or
(<'=:') splitstring "1 ;: &> '
most useful fork I know personally:
inl =: (cocurrent@] ".@] [)"1 0
'code to run in locales' inl loc1;loc2;loc3
the neat parts about it:
the left verb is sideeffects only.
the pivot verb is monadically applied to right verb result
the locale list is usually a list of numeric object instances.
Does anyone have example code for dealing with either BIGNUM structs from c,
and/or ideally some J bindings to openssl?
guidelines for bignums or structs in general are appreciated too.
thank you.
--
For information about J foru
t an expert at it. I
just did trial and error to modify what was included in task.ijs so I
have a basic understanding
On Sat, Jan 25, 2014 at 1:39 PM, Pascal Jasmin wrote:
> Does anyone have example code for dealing with either BIGNUM structs from c,
> and/or ideally some J bindings to opens
J has been able to encrypt/decrypt (verify/sign) rsa signatures for some time,
with special code.
http://www.jsoftware.com/jwiki/PascalJasmin/RSA%20native%20and%20openssl%20control
includes code to generate and retrieve key parameters by spawning openssl
commanline tools. The first line of s
nice.
Thanks,
--
Raul
On Tue, Jan 28, 2014 at 8:53 AM, Pascal Jasmin wrote:
> J has been able to encrypt/decrypt (verify/sign) rsa signatures for some
> time, with special code.
>
> http://www.jsoftware.com/jwiki/PascalJasmin/RSA%20native%20and%20openssl%20control
>
>
&g
mruJfgd0RG' newandgetrsa 'pascaljasmin.txt'
|index error: nkec
| privh=.,>}:^:(':'={:)each(#~0,@:-.@:=$&>),;:>2 3 4 {l
I am also wondering about those blank lines I am seeing.
(And, yes, that is a random and arbitrary example password - one which
I hav
ade sure the path was absolute, and it still fails for me. Here's J6:
'd n'=: 'mruJfgd0RG' newandgetrsa jpath '~temp\pascaljamin'
|index error: nkec
| privh=.,>}:^:(':'={:)each(#~0,@:-.@:=$&>),;:>2 3 4 {l
That's the same error I w
also, I should mention that nkec is not needed at all for rsa, and the call in
newkeys (last line in proc above it) can be changed to:
p nkrsa y
- Original Message -
From: Pascal Jasmin
To: "programm...@jsoftware.com"
Cc:
Sent: Tuesday, January 28, 2014 5:17:39 PM
S
to the left of ',y and
> to the right of .pem
>
> And, as I displayed in my previous messages, my smoutput lines were blank.
>
> Thanks,
>
> --
> Raul
>
>
> On Tue, Jan 28, 2014 at 5:17 PM, Pascal Jasmin wrote:
>> in nkec, check that the following 3 li
also, for the procedures nkec and nkrsa, you can take the individual lines with
_1 fork, and paste them into console using spawn instead.
you can set y as local variable without a path, and files will be created in
ssl/bin folder
- Original Message -
From: Pascal Jasmin
To: "pro
With all of the mathematicians on this list, these functions have likely been
implemented before in J.
elyptic curve point add, multiplication and double
a python reference implementation:
https://github.com/warner/python-ecdsa/blob/master/ecdsa/ellipticcurve.py
the functions are: __add__ __
tinvmod )"0 ] 3x'
2.74558/sec 3.14547MB
ts '(14114588 +i.1) (invmod )"0 ] 3'
2.96905/sec 3.26822MB
- Original Message -
From: Pascal Jasmin
To: "programm...@jsoftware.com"
Cc:
Sent: Wednesday, January 29, 2014 11:35:19 AM
Subject: [Jprogrammin
ve stuff; I think there is a +1 error that Roger Hui
noticed in the factorization method.
http://archive.vector.org.uk/art10007270
http://archive.vector.org.uk/art10007280
Best, Cliff
On 1/29/2014 11:35 AM, Pascal Jasmin wrote:
>
> With all of the mathematicians on this list, these funct
Is there a way to set the rank of the resulting verb of a conjunction? A bit
surprisingly, this workaround does not work:
t=: 2 : '(u@:v)"1'
] t+/ 3 3 $ i.9
9 12 15
result desired:
]@:+/"1 ] 3 3 $ i.9
3 12 21
Ideally, it should be possible to set rank like:
t =: 2 : 0 ("1)
...
)
I g
35 AM, Pascal Jasmin wrote:
>
> With all of the mathematicians on this list, these functions have likely been
> implemented before in J.
>
> elyptic curve point add, multiplication and double
> a python reference implementation:
> https://github.com/warner/python-ecdsa/blob/mas
tiplying a Point and an
integer, nor have I seen any constructor for constructing a Point from
an integer.
Before I spend too much time chasing down rabbit holes (I really
should be working on some other issues), can someone explain to me
what is supposed to happen here?
Thanks,
--
Raul
On Wed, J
m...@jsoftware.com
Cc:
Sent: Wednesday, January 29, 2014 3:32:21 PM
Subject: Re: [Jprogramming] math requests
Some elliptic curve stuff; I think there is a +1 error that Roger Hui
noticed in the factorization method.
http://archive.vector.org.uk/art10007270
http://archive.vector.org.uk/art1000728
1 ([ isCurvePoint stdPoint) 1943424321543223423423422342342343x (23 1 1
ecm )"0 1] 3 10 1x
1
where stdpoint and iscurvepoint
stdPoint =: 4 : 'x | (xx, yy)* x | 2 3 ^~ x invmod z [ x=. {.x[ ''xx yy z'' =.
y '"_ 1
isCurvePoint=: 4 : '0=p| (*:@{: - b + (a
nderstanding of the math
can explain to me how to think about this. Or, I am hoping that someone
with a fresher set of eyes can see my mistake.
(And, I should probably have capitalized the name negativeSelf for
consistency.)
Thanks,
--
Raul
On Wed, Jan 29, 2014 at 11:35 AM, Pascal Jasmin wro
ementation either.
Consider:
y3 = ( l * ( self.__x - x3 ) - self.__y ) % p
Thanks,
--
Raul
On Thu, Jan 30, 2014 at 10:41 PM, Pascal Jasmin wrote:
> Hi Cliff,
> I don't understand how to go from xyz back to xy coordinates.
>
>
> At any rate, here is the affi
't really all that different.
> But I sort of like the way this expression looks.
>
> Thanks,
>
> --
> Raul
>
> On Wed, Jan 29, 2014 at 3:02 PM, Pascal Jasmin wrote:
>> Here is the first invmod method
>>
>> invmod=: 4 : 0
>> NB. inverse of y mod x (x|y)
I like this. If this may one day be included in jhs itself, I would prefer the
display were smaller, and that a line may be copied as plain text.
In terms of array display, probably the most useful feature would be
distinguing between 1 6 $ i.6 and 6 $ i.6.
- Original Message -
From:
same. That is
before you try distinguish between 0 6 $ i.6 and 0 1 $ i.6 etc. It has been a
fun exercise, although as Raul has said, it can also be maddening.
Cheers, bob
On Feb 3, 2014, at 11:11 AM, Pascal Jasmin wrote:
> I like this. If this may one day be included in jhs itself, I woul
There is:
'0><' {~ * i:5
<0>
and the verb: ([ {~ *@]) could be called selectnounfrom01_1
When selecting among expressions you should look at @. for if. do. u else. v ,
and ^:boolean for if. do.u else y
I can think of syntactic sugar for if else as you put it to verbs/expressions,
b
;<'"_) if (0>])else ('>'"_) if (0<])"0 i:5
<<<<<0>>>>>
- Original Message -
From: Pascal Jasmin
To: "programm...@jsoftware.com"
Cc:
Sent: Tuesday, February 4, 2014 7:39:32 AM
Subject: Re:
the :. trick from Michal is cute.
Here is how I would like to be able to call the code (note this produces
incorrect results):
if =: 2 : '((u"_) :. ])^:([: -. [: +: [: -. v)"0'
else =: 2 : '(u"_):.(v"_)'
3 if (0<]) i:5
_5 _4 _3 _2 _1 0 3 3 3 3 3
+: else 3 if (0<]) i:5
_5 _4 _3 _2 _1 0
Also allows if without an else:
+: if (0<]) i:5
_5 _4 _3 _2 _1 0 2 4 6 8 10
-:`+: if (0<]) i:5
_2.5 _2 _1.5 _1 _0.5 0 2 4 6 8 10
-: else +: if (0<]) i:5
_2.5 _2 _1.5 _1 _0.5 0 2 4 6 8 10
-: else 3 if (0<]) i:5
_2.5 _2 _1.5 _1 _0.5 0 3 3 3 3 3
2 else ] if (0<]) i:5
2 2
And conjunctions are deprived of that opportunity.
An example from the other thread, the conjunction:
else =: 2 : '(u"_)`(v"_)'
seems like a useful replacement to tie if you want eye candy for "verbifying"
any of its arguments, but it doesn't actually work for multiple applications:
3"_`+:
rogramming] Re {programming] setting rank to a a conjunction
Can you explain what result you want to achieve here?
Thanks,
--
Raul
On Wed, Feb 5, 2014 at 9:09 AM, Pascal Jasmin wrote:
> And conjunctions are deprived of that opportunity.
>
> An example from the other thread
you using 'else' without 'if'?
As near as I can tell, you are trying to construct a gerund, why use
'else' at all in this case?
Thanks,
--
Raul
On Wed, Feb 5,
Also, of course, there are some cases where it's important to
preserve the original rank of a verb. But that's a different context.)
Thanks,
--
Raul
On Wed, Feb 5, 2014 at 10:31 AM, Pascal Jasmin wrote:
> The purpose is syntax sugar for mixing and matching verb and nouns into a
A bit of an explanation to the answer
":"0 i.4
0
1
2
3
converts numbers to text representation.
'm'(,":)"0 i.4
or
'm' ,"0 1 ": "0 i.4
will provide the same answer Raul gave.
- Original Message -
From: Raul Miller
To: Programming forum
Cc:
Sent: Friday, February 7, 2014
works with j8's jhs from update all and chrome on windows8.
A quick in jhs though is that, in jijx, ctrl-shift up and down to scroll
command history causes some weird flashing highlighting that I don't remember
occurring before.
- Original Message -
From: Eric Iverson
To: Programming
great news. Thank you all that worked on release.
An issue is that avast thinks that j801_win64.exe is infected with
win32:malware-gen .
- Original Message -
From: Eric Iverson
To: Programming forum
Cc:
Sent: Monday, February 10, 2014 7:39:13 PM
Subject: [Jprogramming] J801 released
demos work fine. (and avast makes no complaints about the zip version of J8)
I notice that sdgetpeername and sdgetsockname do not work on websockets
(understandable if they are not sockets) and there is no QT equivalent for the
functions.
Is that something not implemented by QT, or not implemen
se globals will not cause any
trouble. A handler can erase them if they are no longer used.
Anyways, IMO, to compare socket with websocket is analogous
to compre an apple with an pineapple.
Пн, 10 фев 2014, Pascal Jasmin писал(а):
> demos work fine. (and avast makes no complaints about the zip
gt; Since J is single thread, those globals will not cause any
> > trouble. A handler can erase them if they are no longer used.
> >
> > Anyways, IMO, to compare socket with websocket is analogous
> > to compre an apple with an pineapple.
> >
> > Пн, 10 фев 2014
I like it.
I'll restate my preference for simpler css. Using colour only if boxes aren't
completely necessary (datatype).
I understand the desire to deal with leading 0 shapes, but I think leading 1
shapes are what byte people/beginers the most. For instance assuming that }.
and {: produce i
A minor wierdness with websockets is that connect returns a string socket,
whereas the event handlers have integer sockets.
I was hoping that 6!:2 allowed for event handlers to process messages, but it
doesn't appear to. Does such a command exist? A bit like the old vb windows
3.1 doevents()/
code in the 'z' locale. Why not
use some other locale?
Also, I am not clear what you are asking for, with the event handler, but
clearly you can call it yourself if you wish to do so (and you could
maintain your own queue of commands to feed it, if you want that).
Thanks,
--
Raul
On
'ws query 1'
)
cocurrent 'z'
deleteitem_z_ =: {. , >:@[ }. ]
defaults1 =: ([`]@.(0=#@>@[))
defaults =: defaults1"0 0 f.
fixlenx =: 1 : (':';'((#y) {. x) u y')
iorinf =: (#@[ _:^:= i.)
inl_z_ =: (cocurrent@] ".@] [)"1 0
pD_z_ =: 1!:2&2
k fine. (but they would fail in a script)
- Original Message -
From: Raul Miller
To: Programming forum
Cc:
Sent: Wednesday, February 12, 2014 10:43:23 PM
Subject: Re: [Jprogramming] Qt websockets and doevents
Are you looking for http://www.jsoftware.com/jwiki/Scripts/WindowsTimer?
Tha
7;
|value error: fixlenx
| 'socket conntype commands auth'=:y defaults fixlenx
a:;'client';'testcommands';'authserver'
Do you intend for the client and the server to be the same instance of J?
If so, why would you want that? If not, which parts go where?
ommand will return as soon as after sending request to server
without waiting for the reply. The connection is not guaranteed to be
successful.
Therefore you need to wait for the onOpen event before sending any data.
On Thu, Feb 13, 2014 at 1:05 PM, Pascal Jasmin wrote:
> Something like that
y is incorrect for client mode,
some of those socket may be not yet connected to ther remote
server.
Чт, 13 фев 2014, Pascal Jasmin писал(а):
> The problem is that it appears to be impossible to wait for the onOpen event
> while running code. Inserting a delay does not work anyway.
>
. httpconn y do. {.sk return. end.
x httpsend sk=. {:sk
(sdclose]httprecvall) sk
)
httpconn=: 3 : 0
'host port'=. y
if. 0~:s=. >{.x=. sdgethostbyname host do. s return. end.
s=. >{.sdcheck sdsocket''
sdconnect s;(}.x),{.sdcheck sdselect y;'';'&
Another issue I've uncovered in single application client and server
communication, also applies to separate applications.
It appears that the server receives the connect (onOpen) event first (before
client), but even though the server is connected, it is not safe for it to send
yet.
For insta
]data =. '1;2;3;4;5;' ,: '6;7;8;9;0;'
1;2;3;4;5;
6;7;8;9;0;
<;._2"1 a
┌─┬─┬─┬─┬─┐
│1│2│3│4│5│
├─┼─┼─┼─┼─┤
│6│7│8│9│0│
└─┴─┴─┴─┴─┘
2{."1 < ;._2"1 a
┌─┬─┐
│1│2│
├─┼─┤
│6│7│
└─┴─┘
if data is already structured:
i. 2 5
0 1 2 3 4
5 6 7 8 9
2{."1 i. 2 5
0 1
5 6
- Original Mes
"string manipulation in J is non-trivial..."
The scary code from Raul was trying to replace a default space as a fill
character.
'hi' ,: 'there'
produces a list of 2 5 long strings
'hi '
'there'
"Passing 3 or more parameters to a verb"
an explicit verb can have its first line be:
'a b c' =
this is scary
a: -: <$0
1
a: = <$0
1
a: -: &> <$0
1
a: -: each <$0
┌─┐
│1│
└─┘
- Original Message -
From: Henry Rich
To: Programming forum
Cc:
Sent: Saturday, February 15, 2014 12:28:06 PM
Subject: [Jprogramming] a: is not <$0
The Dictionary defines a: as <$0, but in fa
ng for in addition to the 'different things
>>> should display differently')
>>>
>>> I have attached the script of the simple test page to the wiki at
>>>
>>> http://www.jsoftware.com/jwiki/http%3A/www.jsoftware.com/jwiki/BobTherriault/Visualize?
I think this effort, and Bob's nice JHS app displaying datatype and rank hints
of results are worthwhile. We could make J harder by enforcing only ascii
numeric data, and deleting all of its documentation, but if that seems an
obviously poor choice, then so would discouraging attempts to enhanc
In terms of spreadsheets, J is an excellent replacement, but usually using the
grid is not necessary.
For instance figuring out the loan balance of say a $10k loan at 5% interest
with payment schedule p, where payments are made at end of period (so interest
is calculated on balance right before
imidated to try).
>
>
>Thanks,
>
>
>--
>
>Raul
>
>
>
>
>On Sun, Feb 16, 2014 at 1:41 PM, Pascal Jasmin wrote:
>
>> In terms of spreadsheets, J is an excellent replacement, but usually using
>> the grid is not necessary.
>>
>> For ins
1 ro 2 arguments for send.
either "send socket" or "send socket data"
try this
wd 'ws send ', (": sk) , ' hello'
or
wd 'ws send ', (": sk) , ' "hello client, username:"'
or
wd 'ws send ', (
Also QtWebsocket may interpret and convert data as utf8 text but
a. is not a legal utf8 string. I guess neither will other
websockt server/client, eg javascript, will handle raw binary data
in the same manner as J. They either use equivelent of sendb or
encode binary to plain text such as base64 in ord
insert does take planning to design for, but remember its simple definition for
verb v, v/ 1 2 3 4 is:
1 v 2 v 3 v 4 which is:
1 v (2 v (3 v 4))
so that wont work here (because y argument to dyadic v gets modified to be the
result of rightmost reduction), but dyadic \ I think does:
2 (1-%
Is there a a thought that base64 should be applied before J code? If base 128
or base 196 is possible, then that would be an argument not to, because there's
no way to know what encoding the other side might be using. An alternative to
'text' or 'binary' for the 2nd parameter could be 'text',
et protocol means utf8
encoding. Older websocket spec did not allow binary data so
that binary data have to be encoded to plain text at that time.
Current websocket spec (rfc 6455) allows binary data and there
is no more need to encode.
* https://tools.ietf.org/html/rfc6455
Пн, 17 фев 2014, Pasc
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