New year's day is January the first, not January the zeroth.
'The first' is an ordinal number - not a cardinal number.
A zero-origin index counts how many elements to skip before reaching a certain
element. It is a cardinal number - not an ordinal number. Zero is a cardinal
number - 'zeroth' is not an ordinal number.
Not distinguishing cardinal numbers from ordinal numbers creates confusion.
Thanks. Bo.
Den søndag den 30. december 2018 18.54.48 CET skrev Henry Rich
<[email protected]>:
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
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