SP=: ' '
b2o=: }.@(( 'x'
(b2o -: b2q) x
1
timer 'b2o x'
0.388007
timer 'b2q x'
0.262082
On Thu, Sep 6, 2012 at 4:07 PM, Ian Clark wrote:
> Quite right, Raul. And strings containing newlines do matter to me. A lot.
>
> I confess I only threw in bpv as a bit of a joke. It relies
The first time I saw
;: ^: _1
was in a solution offered by Ewart Shaw a long time ago
(before 1998, since it is not in the current archives).
My reply was: Wow!
One may be using J for years and still someday discover such pearls.
~ Gilles
--
I 'm trying to use the "deoptim" math addon package.
However can't figure it out.Tried the following trite example to
understand how things work.
NB. Minimize the sum of squares within the range _3 to 3
require 'math/deoptim'
ssq=:+/@*:
deoptim 'ssq';_3 3
This fails for a
As I understand it, the short hand load'foo/bar' is intended to load
an addon package, and a package is fixed at the 2nd level of the
folder tree under ~addons. If it can work with other variations
under ~addons, it might be a bug.
Птн, 07 Сен 2012, Ian Clark писал(а):
> @Raul @Devon
>
> Yes, t
@Raul @Devon
Yes, thank you both, your thoughts have helped me a lot.
Though I guess I knew most of that already. But what was bugging me
was this one simple thing...
My proposed addon 'misc/zulu' is meant for raw beginners. Consequently
I want them to "require" it in as easy a way as possible.
On Thu, Sep 6, 2012 at 7:07 PM, Ian Clark wrote:
> (I suspect ;:inv will eventually let me down too, but I haven't fooled it
> yet!)
I have not been able to make it misbehave (though I've been too lazy
to look up the c source for it, which would probably be the efficient
thing to do).
;:inv
Quite right, Raul. And strings containing newlines do matter to me. A lot.
I confess I only threw in bpv as a bit of a joke. It relies on 5!:5
converting boxed z to...
<;._1 ' alpha bravo charlie'
which it doesn't always. In fact, it returns your example without change ...
z123=: '1';'2';'3'
Note that bpv would also have problems with boxed strings containing
spaces, and even worse problems with boxed strings containing
newlines. (It's not clear, though, if strings containing newlines
matter to you.)
--
Raul
On Thu, Sep 6, 2012 at 6:39 PM, Ian Clark wrote:
> Right you are.
>
> Wha
Right you are.
What I really want (but haven't said) is the fastest versions of b2o
(boxed-to-open-string) and b2f (boxed-to-LF-separated-string), where
b2f is b2o with ' ' (-:SP) replaced with LF.
I think I've got them now, thanks to everyone.
BTW solutions involving deb aren't general enough,
bpv '1';'2';'3'
'3
--
Raul
On Thu, Sep 6, 2012 at 6:32 PM, Ian Clark wrote:
> Here's a really perverse solution ...
>bpv=: 3 : '}:8}.5!:5<''y'''
>bpv z
> alpha bravo charlie
>
> I've played with Roger's suggestion: }: ; z,&.> ' '
> to get:
>rrb=:[: }.@; SP ,&.> ]
> (where
Here's a really perverse solution ...
bpv=: 3 : '}:8}.5!:5<''y'''
bpv z
alpha bravo charlie
I've played with Roger's suggestion: }: ; z,&.> ' '
to get:
rrb=:[: }.@; SP ,&.> ]
(where: SP=: ' ')
I've also done some repeated timings of solutions to-date, with a
longer z of 1000 atom
I prefer
;:inv z
But note that
deb,' ',.>z
would work. (J6 users need require'strings' before this can work.)
FYI,
--
Raul
On Thu, Sep 6, 2012 at 6:21 PM, Ian Clark wrote:
> Yes, but we need a string.
> You can ravel the 2D array to get a string, viz:
>,> z
> but it gives you a va
Yes, but we need a string.
You can ravel the 2D array to get a string, viz:
,> z
but it gives you a varying number (0 or more) of separating spaces.
On Thu, Sep 6, 2012 at 10:50 PM, km wrote:
> > 'alpha';'bravo';'charlie'
> alpha
> bravo
> charlie
>
> I'm resending because the echo from
> 'alpha';'bravo';'charlie'
alpha
bravo
charlie
I'm resending because the echo from Jsoftware to my iPad was incorrect. Hope
this one shows my solution was to open the list of boxes.
Sent from my iPad
On Sep 6, 2012, at 4:32 PM, km wrote:
>> 'alpha';'bravo';'charlie'
> alpha
>
On 9/5/12, pascha wrote:
> I have a huge matrix (say n x m) and I want to drop the columns numbered
> with
> mutiple of 3 (i.e. 3th, 6th, 9th,..)
> how can I achieve that?
Roger already showed you a good way, but let me show some others.
Let me use this matrix as an example input.
]d =: (?.6
> 'alpha';'bravo';'charlie'
alpha
bravo
charlie
(shape 3 7)
Sent from my iPad
On Sep 6, 2012, at 11:38 AM, Ian Clark wrote:
> Kindergarten class...
>
> I have a list of boxed literals...
> z=: 'alpha' ; 'bravo' ; 'charlie'
>
> I want to flatten it to a literal, but with spaces betw
a,:b NB. note differences between , ,. and ,:
On Thu, Sep 6, 2012 at 5:23 PM, pascha wrote:
>
> Maybe it's too simple but I do have problem. I have two matrix with the same
> size but with different values, i.e.:
> i.3 4
> 0 1 2 3
> 4 5 6 7
> 8 9 10 11
> and
> 1+ i.3 4
> 1 2 3 4
> 5 6 7
Maybe it's too simple but I do have problem. I have two matrix with the same
size but with different values, i.e.:
i.3 4
0 1 2 3
4 5 6 7
8 9 10 11
and
1+ i.3 4
1 2 3 4
5 6 7 8
9 10 11 12
now both have size of 3 x 4. How would you concatenate them to one matrix to
have the size of 2 x 3
Maybe it's too simple but I do have problem. I have two matrix with the same
size but with different values, i.e.:
i.3 4
0 1 2 3
4 5 6 7
8 9 10 11
and
1+ i.3 4
1 2 3 4
5 6 7 8
9 10 11 12
now both have size of 3 x 4. How would you concatenate them to one matrix to
have the size of 2 x 3
On Thu, Sep 6, 2012 at 3:39 PM, Ian Clark wrote:
> Re-reading this thread I think my terse reply could be taken for curt.
> I apologise if this has given offence.
No offense taken.
Disorientation on the other hand? I have been taking some of that...
> 1. Is there a recommended way of doing thi
As soon as I saw ;:inv it rang a bell...
And, hey presto! ...
http://www.jsoftware.com/pipermail/programming/2012-January/026347.html
PATIENT: I keep on forgetting what I've just said!
DOCTOR: How long's this been going on?
PATIENT: How long's what been going on?
Sorry, folx. :-\
On Thu, Sep 6,
Thanks Devon - Nice work.
Cheers, bob
ps. my apologies for not acknowledging your original idea of a joint
submission. I have added your name to the author list through your
participation with the explanation. bt
On 2012-09-06, at 1:13 PM, Devon McCormick wrote:
> Thanks, Bob.
>
> I just add
Thanks, Bob.
I just added an explanation of the code that's only slightly
incomplete - I didn't explain how the "dot" gives a matrix and I'm not
up on the nuances of Unicode so I didn't explain the "2#" on the table
of numbers.
On Thu, Sep 6, 2012 at 1:30 PM, bob therriault wrote:
> Hey everyone
@Raul
Re-reading this thread I think my terse reply could be taken for curt.
I apologise if this has given offence.
Let me re-engage with your reply, this time more carefully.
* * * * *
My question had two parts. Paraphrasing them:
1. Is there a recommended way of doing this, viz offerring and
I do something like this now using the first method you propose: I set
a global flag. In the script, I check for the existence of this flag
and set it (as a local variable) to a default value if it isn't
defined. I don't think it's that yukky.
--
Devon McCormick, CFA
^me^ at acm.
org is my
pref
That's the nicest for this usage. joinstring (in the strings script
j602, loaded at boot in j701) is useful for occasions when you want to
join with one or more other chars.
',' joinstring z
alpha,bravo,charlie
')(' joinstring z
alpha)(bravo)(charlie
On Fri, Sep 7, 2012 at 4:44 AM, Aai wro
On Thu, Sep 6, 2012 at 12:43 PM, Ian Clark wrote:
> No I'm not sure I can't solve it some other way. That's why I'm asking.
>
>> Why?
>
> Why shouldn't I want an addon that can be loaded in different modes?
> (Forget about "require" for now.)
It's complex.
If people use your misc/zulu, and one p
Hey everyone,
I just posted the 43 character solution on the contest site.
http://codegolf.stackexchange.com/questions/7036/print-custom-alphabet/7192#7192
Authors listed as:
AlvordBossCerovskiCyrEllerHuiLambertMillerQuintanaSchottSherlockTaylorTherriault
Let me know if anyone was missed and I
There was a spam from this account before, and no other messages from it.
We have our own mailman forums, so can reinstate if need be.
On Thu, Sep 6, 2012 at 3:08 PM, Ian Clark wrote:
> A note of caution: it might be spam sent from a hijacked account. Been
> happening a lot recently.
>
> Do we h
Nice.
On Thu, Sep 6, 2012 at 9:44 AM, Aai wrote:
>
>;: inv z
> alpha bravo charlie
>
> On 06-09-12 18:38, Ian Clark wrote:
>
>> Kindergarten class...
>>
>> I have a list of boxed literals...
>> z=: 'alpha' ; 'bravo' ; 'charlie'
>>
>> I want to flatten it to a literal, but with spaces b
;: inv z
alpha bravo charlie
On 06-09-12 18:38, Ian Clark wrote:
Kindergarten class...
I have a list of boxed literals...
z=: 'alpha' ; 'bravo' ; 'charlie'
I want to flatten it to a literal, but with spaces between. (Variant:
--with LF's).
Raze (;) does indeed flatten the list...
No I'm not sure I can't solve it some other way. That's why I'm asking.
> Why?
Why shouldn't I want an addon that can be loaded in different modes?
(Forget about "require" for now.)
On Thu, Sep 6, 2012 at 5:10 PM, Raul Miller wrote:
> On Thu, Sep 6, 2012 at 11:00 AM, Ian Clark wrote:
>> Say I
}: ; z,&.> ' '
alpha bravo charlie
On Thu, Sep 6, 2012 at 9:38 AM, Ian Clark wrote:
> Kindergarten class...
>
> I have a list of boxed literals...
>z=: 'alpha' ; 'bravo' ; 'charlie'
>
> I want to flatten it to a literal, but with spaces between. (Variant:
> --with LF's).
>
> Raze (;) do
Kindergarten class...
I have a list of boxed literals...
z=: 'alpha' ; 'bravo' ; 'charlie'
I want to flatten it to a literal, but with spaces between. (Variant:
--with LF's).
Raze (;) does indeed flatten the list...
;z
alphabravocharlie
There's got to be a really neat extended Raze which
On Thu, Sep 6, 2012 at 11:00 AM, Ian Clark wrote:
> Say I want to release an addon called: misc/zulu. It has a choice of
> modes to load it in.
Why?
The require mechanism assumes that once something is loaded that it
does not have to be loaded again.
It seems to me that offering load time optio
Is this what you want?
a=:i.4 4
m=:1 1 0 0,:0 1 1 1
(8$m)*(2#a)
0 1 0 0
0 1 2 3
4 5 0 0
0 5 6 7
8 9 0 0
0 9 10 11
12 13 0 0
0 13 14 15
On Thu, Sep 6, 2012 at 8:28 AM, Devon McCormick wrote:
> I'm not as conversant with rank as you are. To my way of thinking,
>
Say I want to release an addon called: misc/zulu. It has a choice of
modes to load it in. These modes set tracing or include optional
verbs, builds system data differently etc.
As it loads, zulu.ijs expects to see a system flag somewhere (call it:
LOADMODE_j_) to run conditional code or set its ow
I'm not as conversant with rank as you are. To my way of thinking,
you want to multiply each row of "a" by each row of the multiplier:
a *"1/2 4$ 1 1 0 0 0 0 1 1
1 1 0 0
0 0 1 1
1 1 0 0
0 0 2 2
1 1 0 0
0 0 3 3
1 1 0 0
0 0 4 4
This gives a 3-D result, which may be handy depending on what yo
A note of caution: it might be spam sent from a hijacked account. Been
happening a lot recently.
Do we have a procedure for victims to apologise / get reinstated?
On Thu, Sep 6, 2012 at 11:11 AM, chris burke wrote:
> Done.
>
> On Thu, Sep 6, 2012 at 9:51 AM, R.E. Boss wrote:
>
>> When is this g
I don't consider that a false positive. Verbs that actually execute a 0
: 0 are unusual - much more likely is that the trailing ) of defineindex
was omitted.
To run lint on this verb, change
y=. <;._2 (0 : 0)
to a form not recognized as a noun-start, such as
y=. <;._2 (0 : (0))
If you do th
Done.
On Thu, Sep 6, 2012 at 9:51 AM, R.E. Boss wrote:
> When is this guy removed from the forum?
>
>
> R.E. Boss
>
>
> > -Oorspronkelijk bericht-
> > Van: programming-boun...@forums.jsoftware.com [mailto:
> programming-boun...@forums.jsoftware.com] Namens Zack Brannigan
> > Verzonden: w
When is this guy removed from the forum?
R.E. Boss
> -Oorspronkelijk bericht-
> Van: programming-boun...@forums.jsoftware.com
> [mailto:programming-boun...@forums.jsoftware.com] Namens Zack Brannigan
> Verzonden: woensdag 5 september 2012 21:44
> Aan: major...@csse.unimelb.edu.au; merc
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