0j_40 ": x: ".40$'1234567890'
1.2345678901234568469964621180726096691200e39
0j_40 ": ". 'x',~ 40$'1234567890'
1.2345678901234567890123456789012345678900e39
Extended precision behaviour is explicit because they consume an order of
magnitude more resource, and it is undesirable for users t
Does it? Even for integral arguments (i.e. where the internal datatype
guarantees that the numbers are whole)?
Any idea why? How did you discover this conversion?
-Dan
Please excuse typos; composed on a handheld device.
On Sep 15, 2013, at 4:47 PM, Raul Miller wrote:
> On Sun, Sep 15, 2013
On Sun, Sep 15, 2013 at 10:42 AM, Dan Bron wrote:
> Yep. Put an 'x' behind or a 'x:' in front.
Note, also, that x: in front generates a floating point representation
of the number as an intermediate result. This would be good in
contexts where too much precision was undesirable (where we think
Thanks for pointing that out, Dan!
On 15 September 2013 15:42, Dan Bron wrote:
Now, while these two sentences are theoretically fungible, and &.": is cute,
> in reality ":^:_1 is monad ". , which is dangerous (":^:_1 '1!:55 ...'
> for
> example).
>
> So, if I were going to apply this code to u
vice-versa).
-Dan
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Alex
Giannakopoulos
Sent: Sunday, September 15, 2013 9:48 AM
To: J Programming forum
Subject: Re: [Jprogramming] Joining up a rank-1 array of int
Yup that did it!
":^:_1 'x',~ -.&' ' ": 1234567 456789 23345567 34446
12345674567892334556734446
Shoulda thought of it! Cheers, Raul!
On 15 September 2013 14:40, Raul Miller wrote:
> On Sun, Sep 15, 2013 at 9:34 AM, Alex Giannakopoulos
> wrote:
> > How can I incorporate an x: (or equiva
On Sun, Sep 15, 2013 at 9:34 AM, Alex Giannakopoulos
wrote:
> How can I incorporate an x: (or equivalent) into the "ijoin" verb, to
> ensure correct bignums?
You might append an 'x' to the right hand side of the numeric string?
Thanks,
--
Raul
--
---
n
>
> -Original Message-
> From: programming-boun...@forums.jsoftware.com
> [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of R.E. Boss
> Sent: Monday, September 09, 2013 5:28 AM
> To: programm...@jsoftware.com
> Subject: Re: [Jprogramming] Joining up a rank-1 array of integer
un...@forums.jsoftware.com] On Behalf Of Dan Bron
Sent: maandag 9 september 2013 5:48
To: programm...@jsoftware.com
Subject: Re: [Jprogramming] Joining up a rank-1 array of integers
That's one of my favorite J idioms!
A similarly elegant phrase arising from the use of -. is (, '/' -.~ {:)
Dan Bron
Sent: maandag 9 september 2013 5:48
To: programm...@jsoftware.com
Subject: Re: [Jprogramming] Joining up a rank-1 array of integers
That's one of my favorite J idioms!
A similarly elegant phrase arising from the use of -. is (, '/' -.~ {:)
'/some/path' . This ensures all
That's one of my favorite J idioms!
A similarly elegant phrase arising from the use of -. is (, '/' -.~ {:)
'/some/path' . This ensures all paths end in a slash, without duplicating
slashes in paths that are already in canonical form. To appreciate its
elegance, write an analogous function on a
I used the fork [-.-. for interesetion. (-. twice again)
Вс, 08 сен 2013, Joey K Tuttle писал(а):
> Another (related, and also using -. (twice!)) expression that I use a
> lot for getting just the digits from a string -
>
>digits=: -.&(a.-.'0123456789')
>
>digits ": 23 45 6
> 23456
>
>
Another (related, and also using -. (twice!)) expression that I use a
lot for getting just the digits from a string -
digits=: -.&(a.-.'0123456789')
digits ": 23 45 6
23456
On 2013/09/08 19:54 , Alex Giannakopoulos wrote:
That 'less' verb is very useful, I'd never had occasion to use i
That 'less' verb is very useful, I'd never had occasion to use it until now!
It could have been a bit more hyped up in the documentation, though, I'd
never even seen it used before! (blush)
On 9 September 2013 03:46, Alex Giannakopoulos wrote:
> Ah, OK, now I got it!
>
> (": 23 45 6) -. ' '
>
>
Ah, OK, now I got it!
(": 23 45 6) -. ' '
23456
It wasn't working because I used the empty string '' instead of the blank
string ' '. Doh!
On 9 September 2013 03:31, bob therriault wrote:
> Well Dan usually comes up with the really insightful answers, but what I
> see happening is that
Also it works inline, e.g.
-.&' ' &. ": 12 3 4 67 09 0 9
but not in a definition, i.e.
ijoin =: ;@cut &. ":
works, but
ijoin =: (-.&'') &. ":
does not.
On 9 September 2013 03:14, Dan Bron wrote:
> Try -.&' ' in place of ;@cut
>
> -Dan
>
> Please excuse typos; composed on a handheld device.
Well Dan usually comes up with the really insightful answers, but what I see
happening is that & is forcing the ' ' as the right argument. When you supply
your right argument it moves to the left side of -. and then the ' ' (empty
spaces) are removed.
Hope this helps, bob
On 2013-09-08, at 7:
Great, thanks very much!
How does that parse, though? I don't follow.
I see a "hook"? of (NOT bond) and , although it's obviously
not a hook since '' is not a verb.
What am I missing?
On 9 September 2013 03:14, Dan Bron wrote:
> Try -.&' ' in place of ;@cut
>
> -Dan
>
> Please excuse typos;
On second thought this would work for single integers into a number, but if you
wanted to stay with a string, Dan's solution is the better way to go.
Cheers, bob
On 2013-09-08, at 7:15 PM, bob therriault wrote:
> Hi Alex,
>
> For base 10 this might work.
>
> t=: 3 4 5 6
> 10 #. t
> 3456
>
Hi - I need to join up a list of integers (presented as a rank-1 array)
into a single number.
At the moment I am using the following,
;@ cut &. ":
which works, but I wonder if there is something better, not using the
supplied 'cut' verb, which seems like overkill.
Any suggestions hints pointers
Hi Alex,
For base 10 this might work.
t=: 3 4 5 6
10 #. t
3456
Cheers, bob
On 2013-09-08, at 7:07 PM, Alex Giannakopoulos wrote:
> Hi - I need to join up a list of integers (presented as a rank-1 array)
> into a single number.
>
> At the moment I am using the following,
>
> ;@ cut &. "
Try -.&' ' in place of ;@cut
-Dan
Please excuse typos; composed on a handheld device.
On Sep 8, 2013, at 10:07 PM, Alex Giannakopoulos
wrote:
> Hi - I need to join up a list of integers (presented as a rank-1 array)
> into a single number.
>
> At the moment I am using the following,
>
> ;@
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