That's the correct result. #\ operates on prefixes of y, which are tables.
Henry Rich
On 12/30/2018 12:28 PM, Linda Alvord wrote:
#\i.8 3
1 2 3 4 5 6 7 8
Sorry, Linda
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: Linda Alvord <[email protected]>
Date: 12/30/18 12:24 PM (GMT-05:00)
To: [email protected]
Subject: Re: [Jprogramming] One-based indices
This doesn't work.
#i.8 3
1 2 3 4 5 6 7 8
Linda
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: Henry Rich <[email protected]>
Date: 12/30/18 12:08 AM (GMT-05:00)
To: [email protected]
Subject: Re: [Jprogramming] One-based indices
Seconded. If you must create lists starting at 1, keep in mind
#\ 'abcdefgh'
1 2 3 4 5 6 7 8
which Roger even supported with special code.
Henry Rich
On 12/29/2018 11:49 PM, Roger Hui wrote:
Why not use >:@i. ?
WRT a 1-origin primitive, don't do it! Even non-APL people know this.
See *Why
numbering should start at zero
<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.cs.utexas.edu%2Fusers%2FEWD%2Fewd08xx%2FEWD831.PDF&data=02%7C01%7C%7C9e44f8b9de4d49a54aac08d66e7b98c7%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636817874454098584&sdata=SwB6%2FtOljN%2BEhNXUoESr4X4bSNi4a3lOTXbbTiw97C0%3D&reserved=0>.*
1-origin *delenda est*.
On Sat, Dec 29, 2018 at 8:22 PM 'Skip Cave' via Programming <
[email protected]> wrote:
I find that I need to use the expression 1+i.x much more often than I use
i.x.
Would it make sense to define the primitive i; as the one-origin version of
i.?
i. 5
0 1 2 3 4
i; 5
1 2 3 4 5
i. 2 3
0 1 2
3 4 5
i; 2 3
1 2 3
4 5 6
This avoids all the side effects of quad IO in APL but provides a handy way
to generate one-based indices.
Skip
----------------------------------------------------------------------
For information about J forums see
https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jsoftware.com%2Fforums.htm&data=02%7C01%7C%7C9e44f8b9de4d49a54aac08d66e7b98c7%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636817874454098584&sdata=rEAdhjw7xl8avJsOiugshj1EZffAbHvUKhhjF2hbEQg%3D&reserved=0
----------------------------------------------------------------------
For information about J forums see
https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jsoftware.com%2Fforums.htm&data=02%7C01%7C%7C9e44f8b9de4d49a54aac08d66e7b98c7%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636817874454098584&sdata=rEAdhjw7xl8avJsOiugshj1EZffAbHvUKhhjF2hbEQg%3D&reserved=0
---
This email has been checked for viruses by AVG.
https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.avg.com&data=02%7C01%7C%7C9e44f8b9de4d49a54aac08d66e7b98c7%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636817874454098584&sdata=p0QxrFpfFhA9pyQ%2FZRa6Ekin4BNKn3BLvWGk%2Fqe3W3A%3D&reserved=0
----------------------------------------------------------------------
For information about J forums see
https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jsoftware.com%2Fforums.htm&data=02%7C01%7C%7C9e44f8b9de4d49a54aac08d66e7b98c7%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636817874454098584&sdata=rEAdhjw7xl8avJsOiugshj1EZffAbHvUKhhjF2hbEQg%3D&reserved=0
----------------------------------------------------------------------
For information about J forums see
https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jsoftware.com%2Fforums.htm&data=02%7C01%7C%7C9e44f8b9de4d49a54aac08d66e7b98c7%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636817874454254828&sdata=MLxReCknfAxge%2BDeH0pIQHKY6WA7hSRd5998SEb3kJw%3D&reserved=0
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
---
This email has been checked for viruses by AVG.
https://www.avg.com
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
