From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: class wide iterable (and indexable)
Date: Tue, 22 Jan 2019 16:02:32 -0600
Date: 2019-01-22T16:02:32-06:00 [thread overview]
Message-ID: <q283tp$6tj$1@franka.jacob-sparre.dk> (raw)
In-Reply-To: q27if9$b0r$1@dont-email.me
"Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org> wrote in message
news:q27if9$b0r$1@dont-email.me...
> On 1/22/19 12:15 AM, Randy Brukardt wrote:
>>
>> Moreover, in a new Ada-like language, it would make the most sense to
>> completely unify containers and arrays, which would mean that arrays
>> would
>> be more like Vectors than like Ada arrays. For instance, in a Vector, the
>> lower bound is fixed for all values of a particular type. That would
>> eliminate a lot of programming errors that happen in Ada programs (many
>> programs fail to deal with unusual lower bounds, because it's hard to get
>> right).
>
> Ada has always had the ability to define array-like types with a fixed
> lower bound:
>
> type String_From_1 (Length : Natural) is record
> Value : String (1 .. Length);
> end record;
>
> I use such constructs when appropriate (in mathematics, for example,
> matrices and vectors have indices with lower values of 1, and a decent
> implementation should reflect and enforce that). One might argue that the
> reason they're not used more often is because of the value of having array
> types with variable lower bounds, but I doubt it.
They're not used more often because this fixes the length, and prevents
operations on items with different lengths. Again, a string is not an
array -- a Vector is a better model for a string.
Randy.
next prev parent reply other threads:[~2019-01-22 22:02 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-02 15:48 class wide iterable (and indexable) George Shapovalov
2019-01-02 17:39 ` Simon Wright
2019-01-02 18:11 ` George Shapovalov
2019-01-03 8:52 ` Simon Wright
2019-01-03 9:30 ` George Shapovalov
2019-01-03 16:45 ` Jeffrey R. Carter
2019-01-04 4:32 ` Shark8
2019-01-05 9:03 ` Randy Brukardt
2019-01-03 22:56 ` Randy Brukardt
2019-01-04 0:00 ` George Shapovalov
2019-01-04 8:43 ` Dmitry A. Kazakov
2019-01-04 12:20 ` George Shapovalov
2019-01-05 23:29 ` Jere
2019-01-05 23:50 ` Jere
2019-01-06 9:34 ` George Shapovalov
2019-01-06 10:19 ` Dmitry A. Kazakov
2019-01-06 11:30 ` George Shapovalov
2019-01-06 12:45 ` Dmitry A. Kazakov
2019-01-06 13:18 ` George Shapovalov
2019-01-06 14:13 ` Dmitry A. Kazakov
2019-01-06 16:33 ` George Shapovalov
2019-01-06 18:29 ` George Shapovalov
2019-01-06 20:32 ` Dmitry A. Kazakov
2019-01-06 21:47 ` George Shapovalov
2019-01-07 9:37 ` Niklas Holsti
2019-01-07 16:24 ` George Shapovalov
2019-01-06 20:18 ` Dmitry A. Kazakov
2019-01-06 21:58 ` George Shapovalov
2019-01-07 8:28 ` Dmitry A. Kazakov
2019-01-05 9:21 ` Randy Brukardt
2019-01-05 10:07 ` Dmitry A. Kazakov
2019-01-05 18:17 ` George Shapovalov
2019-01-05 20:07 ` Simon Wright
2019-01-05 20:41 ` George Shapovalov
2019-01-07 21:07 ` Randy Brukardt
2019-01-08 9:51 ` Dmitry A. Kazakov
2019-01-08 19:25 ` Björn Lundin
2019-01-08 23:26 ` Randy Brukardt
2019-01-09 17:06 ` Dmitry A. Kazakov
2019-01-09 23:38 ` Randy Brukardt
2019-01-10 8:53 ` Dmitry A. Kazakov
2019-01-10 22:14 ` Randy Brukardt
2019-01-11 9:09 ` Dmitry A. Kazakov
2019-01-14 22:59 ` Randy Brukardt
2019-01-15 9:34 ` Dmitry A. Kazakov
2019-01-18 15:48 ` Olivier Henley
2019-01-18 16:08 ` Dmitry A. Kazakov
2019-01-18 16:29 ` Olivier Henley
2019-01-18 16:54 ` Dmitry A. Kazakov
2019-01-18 17:31 ` Olivier Henley
2019-01-18 18:51 ` Shark8
2019-01-18 20:09 ` Dmitry A. Kazakov
2019-01-21 23:15 ` Randy Brukardt
2019-01-22 8:56 ` Dmitry A. Kazakov
2019-01-22 22:00 ` Randy Brukardt
2019-01-23 8:14 ` Dmitry A. Kazakov
2019-01-22 17:04 ` Jeffrey R. Carter
2019-01-22 22:02 ` Randy Brukardt [this message]
2019-01-23 18:00 ` Jeffrey R. Carter
2019-01-23 20:14 ` Shark8
2019-01-23 22:47 ` Randy Brukardt
2019-01-24 17:11 ` Dmitry A. Kazakov
2019-01-28 15:54 ` Shark8
2019-01-28 17:23 ` Dmitry A. Kazakov
2019-01-08 18:32 ` G. B.
2019-01-05 17:05 ` Jeffrey R. Carter
2019-01-05 20:18 ` Dmitry A. Kazakov
2019-01-05 21:09 ` Shark8
2019-01-06 10:11 ` Jeffrey R. Carter
2019-01-05 20:46 ` Shark8
2019-01-06 9:43 ` Dmitry A. Kazakov
2019-01-26 22:11 ` George Shapovalov
2019-01-26 22:14 ` George Shapovalov
-- strict thread matches above, loose matches on Subject: below --
2019-01-29 7:45 Randy Brukardt
2019-01-29 19:34 ` Niklas Holsti
2019-01-29 20:26 ` Dmitry A. Kazakov
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