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Date: Sat, 18 Apr 2020 09:34:29 -0700 (PDT)
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Subject: Re: Beginning Ada Programming, by Andrew T. Shvets (2020)
From: cantanima.perry@gmail.com
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Xref: reader01.eternal-september.org comp.lang.ada:58407
Date: 2020-04-18T09:34:29-07:00
List-Id: <comp.lang.ada>

On Saturday, April 18, 2020 at 10:29:15 AM UTC-5, AdaMagica wrote:
> Just for the wow effect:
> 
> I come from Algol 60, later Pascal. I liked Pascal very much, but what annoyed me was for instance that for looping over arrays, I had to look up the bounds. So I defined functions serving this need.
> When I met Ada, this was one of the first wow effects that there are language means for this purpose. Ada 83 had everything I missed in Pascal. Is there any other language on earth providing this?

I'm not sure I understand what you're saying, but if A is an array, then:

   - Modula-2 has HIGH(A) when A is an open array;
   - Modula-3 has FIRST(A) and LAST(A);
   - Eiffel has A.lower and A.upper.

But many languages these days are designed so that you don't have to bother with the array bounds at all:

   - C++ and Java have the for (auto a : A) { } construct;***
   - Eiffel has an across keyword;
   - Kotlin and Python have for (a in A) construct;

and so forth. So it seems that most popular languages these days allow this.

regards
john perry

***The C++ and Java versions don't work on low-level arrays. As I recall, Eiffel, Kotlin, and Python bring the machinery of high-level arrays to all arrays.