It is basically after closing the file you just opened.
So when no files are open, the run button (and possibly others) should
disappear or be deactivated.
Jan-Pieter
2014-02-21 0:54 GMT+01:00 chris burke :
> I cannot reproduce this.
>
> Do you only get the error when the file is empty? Do you
I wondered if this really was a table or just a bunch of lines, but it
really is a table.
]M=:(h"0) 1+i.7
1 0 0 0 0 0 0
1 2 0 0 0 0 0
1 2 1.5 0 0 0 0
1 2 1.5 1.7 0 0 0
1 2 1.5 1.7 1.6 0 0
1 2 1.5 1.7 1.6
The tables show what is happening quite nicely.
g=: 13 :'(+%)/\ y $ 1x'
(g"0) 1+i.7
1 0 0 0 00 0
1 2 0 0 00 0
1 2 3r2 0 00 0
1 2 3r2 5r3 00 0
1 2 3r2 5r3 8r50 0
1 2 3r2 5r3 8r5 13r8 0
1 2 3r2 5r3 8r5 13r8 21r13
h=:
WOW!
This is quite impressive!
{|.(+%)/\100$1x
573147844013817084101r354224848179261915075
0{|.(+%)/\200$1x
453973694165307953197296969697410619233826r280571172992510140037611932413038
677189525
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:p
" I doubt non like-for-like substitutions (in terms of word class) will ever
work; at least not in general."
I understand that the source template still has to parse before and after
substitutions. Candidates for the placeholders would be:
_: for verbs
The difficulty for adverbs and conjuncti
Adjacent terms approach the golden ratio.
0j5":2%~/\% 1 +. (+%)/\ 20$1x
1.0 2.0 1.5 1.7 1.6 1.62500 1.61538 1.61905 1.61765
1.61818 1.61798 1.61806 1.61803 1.61804 1.61803 1.61803 1.61803 1.61803
1.61803
>
--
It is the first definition I've seen of the Fibonacci series which allows an
explicit verb to be translated into a tacit expression.
f=: 13 :'% 1 +. (+%)/\ y $ 1x'
f 7
1 1 2 3 5 8 135
f
[: % 1 +. [: (+ %)/\ 1x $~ ]
5!:4 <'f'
5!:4 <'f'
-- [:
If you want just the n-th term, you can do as follows, (+%)/ instead of
(+%)/\
% 1 +. (+%)/ 100$1x
354224848179261915075
On Thu, Feb 20, 2014 at 6:48 PM, Linda Alvord wrote:
> It allows you to find the 100th term in a Fibonacci series.
>
> 0}|.% 1 +. (+%)/\ 100 $ 1x
> 35422484817926191
It also can help to think about this if you realize that adjacent numbers
in the fibonacci sequence are relatively prime.
Thanks,
--
Raul
On Thu, Feb 20, 2014 at 9:04 PM, elton wang wrote:
> Two building blocks are needed for this: one is you already know the
> relationship of continued frac
It allows you to find the 100th term in a Fibonacci series.
0}|.% 1 +. (+%)/\ 100 $ 1x
354224848179261915075
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Roger Hui
Sent: Thursday, February 20,
Two building blocks are needed for this: one is you already know the
relationship of continued fractions and Fibonacci numbers, and another is that
you know (+%)/ is for continued fractions. In the same vein, we can also try
this (1&(+%)^:_)1 ( = 1.61803, golden ratio)
On Thursday, Febru
This would be more fun if you provided definitions for tie and rank (and
others you use) in an addon.
Without that, it feels like deus ex machina (and does not execute for me
like it does for you).
Thanks,
--
Raul
On Thu, Feb 20, 2014 at 6:06 PM, Jose Mario Quintana <
jose.mario.quint...@gmai
I'd use an explicit adverb to do:
linrep
substitute
eval assign
return assigned value.
I'm not sure if we have a prebuilt routine to substitute a sequence of
strings into repeats of the same pattern - if not, that would be the
"complex" part of this.
Thanks,
--
Raul
On Thu, Feb 2
Chris
>In the left panel of the Edit window there are three icons. The first icon is
>labeled "Refresh" and appears to that. The third is "Set path from document"
>and does that. The middle is labeled "Home" and seems to be hardwired (in my
>case) to "D"/Users/temp".
>However in the Term windo
I see -- thanks.
Roger Hui wrote:
With 10 elements it doesn't matter. When you get to higher number of
elements, you run out of precision in 64-bit floats and would need the
extended precision arithmetic that comes with 1x.
On Thu, Feb 20, 2014 at 1:37 PM, PMA wrote:
Why 'x'? (I get the s
I see - thanks.
Roger Hui wrote:
With 10 elements it doesn't matter. When you get to higher number of
elements, you run out of precision in 64-bit floats and would need the
extended precision arithmetic that comes with 1x.
On Thu, Feb 20, 2014 at 1:37 PM, PMA wrote:
Why 'x'? (I get the
Adverb and conjunction templates are straightforward. Multiple substitutions
won't be difficult, but will inflate our codebase a bit (the L: approach is
well suited to single substitutions, but unless we insist on a distinct "blank
token" for each substitution [like named parameters], we'll have
When File|New or Open is selected in the editor, the directory shown
initially is the current Project directory if any, otherwise if no Project
is open, it is ~temp.
HOME (or ~home) is not referenced here.
On Fri, Feb 21, 2014 at 8:01 AM, Don Kelly wrote:
> I set up a HOME directory and had pr
I set up a HOME directory and had problems so I re-installed -letting
the installer do its bit and it automatically put me into
c:/users/don/j64-801 which it apparently assumed was "HOME" even
though I still had a HOME directory.
and have had no problem with the editor .
Don Kelly
On 19/0
I cannot reproduce this.
Do you only get the error when the file is empty? Do you have write
permission in the ~temp folder?
On Fri, Feb 21, 2014 at 1:31 AM, Jan-Pieter Jacobs <
janpieter.jac...@gmail.com> wrote:
> Here , I see the same behaviour.
>
> Jan-Pieter
>
>
> 2014-02-20 18:20 GMT+01:00
"
Anyway, thought I'd share, and see if anyone else has useful tools for
manipulating J code (metaprogramming).
"
Dan, I will try to show some meta-programming exercises soon. I am jumping
into the darkness hoping that I will land well; so far, so good. In the
meantime, the following is a F^4 un
very cool. To help people understand it, the requirements for the template are
that it is an implicit definition, and that it parses ok, and also that it is a
verb (modifiers don't play well as gerunds).
with that in mind, here are some verbs to make things a bit easier:
substit =: [^:(__-:])
See also http://www.jsoftware.com/jwiki/Essays/Fibonacci%20Sequence
It is another way to the "Why J?" (or "Why APL?") question. Because it
allows, encourages, assists, ... you to think of 10 different ways of
generating the Fibonacci numbers and other similar questions. Several
factors come into
Weird. You don't need a very big N for
(+%)/ N $ 1
to be pretty close to the Golden Ratio (Phi):
2%~1+%:5
Maybe not so weird. Just looked at Huntley
_The Divine Proportion_, and he has a chapter
"Phi and Fibonacci".
On 2014.02.20 12:42:00, you,
the extraordinary Roger Hui, spake thus:
> % 1
Sorry, I should have clarified the goal is to permit the user to supply the
template as data. So we can do things like:
'`round digits log'=:(0.5<.@:+])&.:(%&__)`(__&#.^:_1)`(__&^.) substit"0~
0.01 10 1x1
round
(0.5 <.@:+ ])&.:(%&0.01)
digits
10&#.^:_1
log
2.7182818284590451&^.
--
With 10 elements it doesn't matter. When you get to higher number of
elements, you run out of precision in 64-bit floats and would need the
extended precision arithmetic that comes with 1x.
On Thu, Feb 20, 2014 at 1:37 PM, PMA wrote:
> Why 'x'? (I get the same result without it.)
>
> - Pete
Why 'x'? (I get the same result without it.)
- Pete
km wrote:
Here is a hint:
% 1 +. (+%)/\ 10 $ 1x
1 1 2 3 5 8 13 21 34 55
--Kip Murray
Sent from my iPad
On Feb 20, 2014, at 2:42 PM, Roger Hui wrote:
% 1 +. (+%)/\ 100 $ 1x
--
Indeed!!
On 20 Feb 2014, at 14:27, Peter B. Kessler wrote:
> The really interesting question is: How can I learn to think that way?
--
Dan T. Abell :: dabell at txcorp dot com :: 303.444.2452
Tech-X Corp., 5621 Arapahoe Ave, Ste A, Boulder CO 80303
http://www.txcorp.com :: 303.748.6894/c 303.44
A more interesting question is: Why did you think of doing it that way? The
really interesting question is: How can I learn to think that way?
... peter
On 02/20/14 12:42, Roger Hui wrote:
% 1 +. (+%)/\ 100 $ 1x
Fibonacci numbers
--- Original message ---
From: "Roger Hui" < rogerhui.can...@gmail.com >
Date: 20 February 2014, 22:42:12
% 1 +. (+%)/\ 100 $ 1x
--
For information about J forums see http://www.jsoftware.com/forums.htm
Here is a hint:
% 1 +. (+%)/\ 10 $ 1x
1 1 2 3 5 8 13 21 34 55
--Kip Murray
Sent from my iPad
> On Feb 20, 2014, at 2:42 PM, Roger Hui wrote:
>
> % 1 +. (+%)/\ 100 $ 1x
> --
> For information about J forums see http://www.j
% 1 +. (+%)/\ 100 $ 1x
--
For information about J forums see http://www.jsoftware.com/forums.htm
This seems really simple, to me.
Of course, it's hard to tolerate simplicity - it's kind of boring, so we
like to discard features of the language. I think of this urge as a social
artifact of our need for J subset compilers.
Still, even if we had compilers, it might still make sense to start wit
There was a question on StackOverflow today on generating constant
functions from the items of an array. As in, 100 200 300 <==>
100"_`(200"_)`(300"_) .
As a more general question, how can we specify code templates and then use
them to dynamically produce gerunds for later execution? *
Here's on
Here , I see the same behaviour.
Jan-Pieter
2014-02-20 18:20 GMT+01:00 Kenneth Lettow :
> I came across this accidentally, I usually try to run code instead of
> executing empty files.
>
> 1. run JQT
> 2. File-> New Temp
> 3. In edit window, close temp file/others so that there are no open file
I came across this accidentally, I usually try to run code instead of
executing empty files.
1. run JQT
2. File-> New Temp
3. In edit window, close temp file/others so that there are no open files.
4. Press the run icon (Green arrow).
5. J crashes
Problem signature:
Problem Event Name: APPCRASH
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