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Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays

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From Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups comp.lang.misc
Subject Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays
Date Sun, 28 Dec 2025 23:50:03 +0100
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On 2025-12-28 22:43, Waldek Hebisch wrote:
> Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wrote:
>> [...]
> 
> Linearization seem to be best as implementaition.  For typed
> interface nice way is to use list (or vectors) as indices.  If a
> language has simple way of creating lists you could have code like
> 
>     a([1, 2, 3, 4])
> 
> for accessing elements. 

Hmm.. - I'll have to ponder about that. There's a chance that I
can model not exactly that but "something like that" in Algol 68.

> Concerning iteration, simple in-order
> iteration basically needs to implement multiposition counter
> with carries at appropriate points.  Or you could expose
> undelying linear structure.  For exmple in Lisp there is
> ROW-MAJOR-AREF to access elements of possibly multidimensional
> array in lineare order and there is ARRAY-ROW-MAJOR-INDEX
> to get linear index corresponding to given tuple of indices
> (useful when one wants to deal with slices).

Yeah, I thought that Lisp might be an appropriate language for
things like that. (Too bad that I don't like that language, and
I anyway need some method here that I can realize in Algol 68.)

Thanks.

Janis

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Algol 68 (or generally) - arbitrarily nested arrays of arrays Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2025-12-26 12:25 +0100
  Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Andy Walker <anw@cuboid.co.uk> - 2025-12-28 12:53 +0000
    Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays ram@zedat.fu-berlin.de (Stefan Ram) - 2025-12-28 14:13 +0000
      Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays ram@zedat.fu-berlin.de (Stefan Ram) - 2025-12-28 14:29 +0000
        Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays ram@zedat.fu-berlin.de (Stefan Ram) - 2025-12-28 14:41 +0000
          Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays ram@zedat.fu-berlin.de (Stefan Ram) - 2025-12-28 14:45 +0000
            Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays ram@zedat.fu-berlin.de (Stefan Ram) - 2025-12-28 23:22 +0000
        Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2025-12-28 15:53 +0100
    Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2025-12-28 15:47 +0100
      Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Andy Walker <anw@cuboid.co.uk> - 2025-12-30 16:29 +0000
        Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-01-01 12:21 +0100
          Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays David Brown <david.brown@hesbynett.no> - 2026-01-01 17:18 +0100
  Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays bart <bc@freeuk.com> - 2025-12-28 15:32 +0000
    Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2025-12-28 23:48 +0100
    Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-28 22:54 +0000
      Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays bart <bc@freeuk.com> - 2025-12-28 23:07 +0000
        Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-28 23:29 +0000
  Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays antispam@fricas.org (Waldek Hebisch) - 2025-12-28 21:43 +0000
    Re: Algol 68 (or generally) - arbitrarily nested arrays of arrays Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2025-12-28 23:50 +0100

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