Tally works whether or not the first element is 0 or 1 and,while I used
index 1 as default in APL, I will stick with index 0 in J as it saves a
lot of hassle.
Don
On 30/08/2014 5:21 PM, robert therriault wrote:
Whoops,
Don, for some reason I got it into my head that you wanted to keep the fi
Thank you,Raul, Robert and Linda
I tried # just before opening my e-mail and getting your answers.
I am kicking myself because I have previously used # this way but this
time my APL got in the way and I was looking at some variation of " /"
Don Kelly
On 30/08/2014 4:51 PM, Raul Miller wrote:
Whoops,
Don, for some reason I got it into my head that you wanted to keep the first
zero. Nub would work against you in that case as it would hold on to the first
zero and remove the rest.
You could always just remove the 0 using Less (-.) in this case the Passive
version (-.~)
0-.~ ( i.#
apl:
1 0 1 0 1 / 1 2 3 4 5
1 3 5
J:
1 0 1 0 1 # 1 2 3 4 5
1 3 5
apl:
1 0 1 0 1 \ 1 3 5
1 0 3 0 5
J:
1 0 1 0 1 #inv 1 3 5
1 0 3 0 5
Thanks,
--
Raul
On Sat, Aug 30, 2014 at 7:30 PM, Don Kelly wrote:
> My intent was to strip the non essential zeros . the original boolean vect
Hi Don,
I think that copy (#) combined with increment (>:) may be able to do the trick.
1 1 0 0 1#i.5 NB.index 0
0 1 4
1 1 0 0 1>:@#i.5 NB.index 1
1 2 5
Although reading through your journey to get to this point I wonder if Nub (~.)
would do the trick.
arr
ab
cd
yyy
jcd
ab
cd
y
1 1 0 0 1#i.5
0 1 4
1 1 0 0 1 #>:i.5
1 2 5
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Don Kelly
Sent: Saturday, August 30, 2014 7:31 PM
To: programm...@jsoftware.com
Subject: Re: [Jprogra
My intent was to strip the non essential zeros . the original boolean
vector based on the inside expression
+./"1 'cd' E."1 arr and multiplied by i.#arr gave 0 1 0 3 0 5 0 7 0 9
for which the indices of interest are 0(first one)1 3 5 7
To be able to account for the first index being 0 , I added 1
That does what I needed.
Thanks,
--
Raul
On Sat, Aug 30, 2014 at 11:35 AM, June Kim (김창준) wrote:
> Hi
>
> Is this what you want? (Note: \n is a backreference to n-th match of the
> pattern)
>
> assert '**123*'-:('[0-9]+';'**\0*') pysub '123'
>
> assert 'ab 123*y*45 de'-:('([0-9]+)([x]+)([0-9]
Note that this works:
'a' |. rxapply ,'A'
Thanks,
--
Raul
On Sat, Aug 30, 2014 at 11:53 AM, June Kim (김창준) wrote:
> Hello
>
> I accidentally have found a bug in rxapply, which actually resides in
> rxfrom.
>
> Have a look at a simple demonstration of the bug:
>
>'a' |. rxapply 'A'
>
>
Due to rxapply(and rxfrom) bug that I posted a minute ago, you have to
currently do the following when the replacement pattern's length is 1:
('AND';,:'&') pysub 'alpha AND bravo'
alpha & bravo
Or, you may switch the definition of rxfrom in regex.ijs to the
commented-out one.
On Sun, Aug 3
Hello
I accidentally have found a bug in rxapply, which actually resides in
rxfrom.
Have a look at a simple demonstration of the bug:
'a' |. rxapply 'A'
|length error: rxfrom
| r=.u&.>mat rxfrom y
I think that is a bug. It should return the original string if nothing is
to be matched and
Hi
Is this what you want? (Note: \n is a backreference to n-th match of the
pattern)
assert '**123*'-:('[0-9]+';'**\0*') pysub '123'
assert 'ab 123*y*45 de'-:('([0-9]+)([x]+)([0-9]+)';'\1*y*\3') pysub 'ab
123x45 de'
assert '
https://www.jsoftware.com/wiki/help/pcre/pcrepattern.html'-:('http://(
> However, for a video game with any more than
> rudimentary complexity, one would wish to separate "frames" (drawing the
> image to the screen) from "ticks" (computing the game logic). Preferably,
> ticks would happen at a constant rate per second, and then the remaining
> computation time would b
Actually, that's buggy.
I should have said:
mid=. (,:({:-{.@,,0:)M) rxcut 1{::segs
Oops...
--
Raul
On Sat, Aug 30, 2014 at 4:13 AM, Raul Miller wrote:
> J has "PCRE" regular expressions:
>
>require 'regex'
>url=: 'http://www.jsoftware.com/help/pcre/pcrepattern.html'
>>('http:
J has "PCRE" regular expressions:
require 'regex'
url=: 'http://www.jsoftware.com/help/pcre/pcrepattern.html'
>('http://[^/]+'&rxmatch rxcut ]) url
http://www.jsoftware.com
/help/pcre/pcrepattern.html
Now.. regular expressions seem like they ought to be a natural fit for
J - if nothing
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