Devon McCormick wrote:
There is frequently performance degradation on a straight port of an
algorithm from a compiled language to J. However, two advantages that J
brings are 1) a different outlook on the problem, sometimes allowng a new
and different algorithm, and 2) a quick way to try
meridian wrote:
Maybe someone can suggest how to re-implement in J.
(if possible without using a totally new algorithm)
#!/usr/bin/env python
Would you mind posting the problem spec?
-Dan
--
For information about J
As you may know then it is faster to create an array first and amend
into it rather than add to the array.
I am also pretty sure that boxing operations take longer.
2009/12/14 miridian mirid...@mailshack.com:
Hallo,
I implemented a solution in J for Euler problem 161.
It is very slow.
:-(
http://projecteuler.net/index.php?section=problemsid=161
R.E. Boss
-Oorspronkelijk bericht-
Van: programming-boun...@jsoftware.com
[mailto:programming-boun...@jsoftware.com] Namens Dan Bron
Verzonden: dinsdag 15 december 2009 14:58
Aan: 'Programming forum'
Onderwerp: Re: [Jprogramming]
mar, 15 Dec 2009, miridian skribis:
Maybe someone can suggest how to re-implement in J.
What is your J solution?
--
regards,
GPG key 1024D/4434BAB3 2008-08-24
gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3
Holyday greeting !
This is a OpenGL for Happy Holyday
Dance of Sugar Plum faily? , Tchaikovsky 's Nutz cracker suite
Dodecahedron and Icosahedron are Dancing according to key x y x
This Script is written by Nishikawa Toshio for JAPLA 2009 05/DEC/2009
I have done some investigations (outside of NinjaTrader, just using
Visual Studio c#). I do not know for sure, but it might be that the
JDLLServerClass does not work on 64 bit Windows 7? I am in way over my
head here, I have no idea what is going on - so apologies in advance
if I am wrong.
I read
It's at http://projecteuler.net/index.php?section=problemsid=161 .
Basically, given triominos like this:
]trioms=. ~.,(|:@:|. ; |: ; ] ; |.1) ('X';'XX');,:'XXX'
+--+--+--+--+-+---+
|XX|XX|X | X|X|XXX|
|X | X|XX|XX|X| |
| | | | |X| |
+--+--+--+--+-+---+
there are 41 ways to tile (no
Holyday greeting ! ...
Dodecahedron and Icosahedron are Dancing according to key x y x
This Script is written by Nishikawa Toshio for JAPLA 2009 05/DEC/2009
...
m.shimura /Japan APL Association
Nice example for us newbies of how to use various graphics commands in
J--thanks!
Harvey
P.S.
There is a lab/demo in J doing these kind of interactive rotations
I saw rubics cube rotated in graphic using APL2 and GDDM something
like 30 years ago.
2009/12/15 PackRat pack...@anet.com:
Holyday greeting ! ...
Dodecahedron and Icosahedron are Dancing according to key x y x
This Script
miridian-2 wrote:
bill lam wrote:
mar, 15 Dec 2009, miridian skribis:
Maybe someone can suggest how to re-implement in J.
What is your J solution?
Here the J code.
To have the real solution of the problem W must be 9.
I have check Python and J with
W = 2 answer =
http://www.nyx.net/~anon84c2/
2009/12/15 Björn Helgason gos...@gmail.com:
There is a lab/demo in J doing these kind of interactive rotations
I saw rubics cube rotated in graphic using APL2 and GDDM something
like 30 years ago.
2009/12/15 PackRat pack...@anet.com:
Holyday greeting ! ...
One important point from the original problem statement, which may be a way
to reduce the amount of work, is that any NxM rectangle can be tiled by
triominos as long as 0=3|N*M.
On Tue, Dec 15, 2009 at 11:38 AM, Devon McCormick devon...@gmail.comwrote:
It's at
Thanks for the help, Mr. Tirrell.
Does JDB have a way to declare the length of the char column?
I've gone through the JDB doc and sample code carefully and can't find
any indication of how to declare the length of the char column.
I've run a few experiments and can't get a JDB database table
I've not used JDB before but it's not clear from your post what exactly you are
trying to do.
You have declared a table consisting of one field that is a single character in
length.
Then you try to insert a record into the table that is multiple characters in
length.
Are you expecting
a) the
Sorry ignore my previous post. Having read your post more carefully I see that
you probably want to know how to do specify the max length of the field. (As I
said, I haven't used JDB before assumed that c1 was more than just the field
name).
Perhaps you checking out the demo databases that
Hi Matthew,
Just saw this thread (and the previous ones) ... unfortunately I'm at home
right now and the machine here is configured for gaming so theres no
development tools whatsoever installed. I'll be back in the office tomorrow
though and will give your problem a run through.
The only
Hi Christopher,
I actually had to rewrite this response a couple of times.
From what I understand from the implementation, all arbitrary sized strings
should be using the VARCHAR datatype. The concept was implementation of a MAX
or field lenth value for VARCHAR is not part of JDB but instead
Thank you Ric, for your suggestions.
I've reviewed the JDB doc carefully as well as all the example code
and haven't found the solution to my trivial problem.
Perhaps its there, but it is invisible to my J disabled cognition.
In my original post on this issue (Sent: Sunday, December 13, 2009
I don't use JDB either, however I guess you cannot declare a maximum length for
the literal string in char column. you might have to reshape rank-1 vector
before
inserting. eg.
ht=: Create__db 'tblChar2';'c1 char'
Insert__db 'tblChar2';'a'
Insert__db 'tblChar2';,'b'
Insert__db
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