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Programming > Ada > Re: Are there n...
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Re: Are there noticable differences in Ada acceptance by country?

by "Dmitry A. Kazakov" <mailbox@[EMAIL PROTECTED] > Mar 20, 2008 at 09:48 PM

On Thu, 20 Mar 2008 20:22:22 +0000, Simon Wright wrote:

> gpriv@[EMAIL PROTECTED]
 writes:
> 
>> I think strong typing should not be dismissed.  Unfortunately Java-
>> based (and C/C++/C#) courses don't explain to students that X and Y
>> coordinates being fundamentally integer (or float) types are not the
>> same thing.
> 
> I always disliked an X binding which had (sub)types for X, Y
> coordinates. Wrong level of abstraction, I thought: use something like
> 
>    type Position is record
>       X : Float;
>       Y : Float;
>    end record;
> 
> and you get a _lot_ less scope for confusion.

If no rotations involved I would suggest:

   type Horizontal_Coordinate is new Float;
   type Vertical_Coordinate is new Float;
   type Position is record
       X : Horizontal_Coordinate;
       Y : Vertical_Coordinate;
   end record;

In some cases I would consider making absolute positions and relative
offsets different types, similar to Time and Duration.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
 




 42 Posts in Topic:
Are there noticable differences in Ada acceptance by country?
Mike Silva <snarflemik  2008-03-18 12:08:30 
Re: Are there noticable differences in Ada acceptance by country
Pascal Obry <pascal@[E  2008-03-18 21:41:49 
Re: Are there noticable differences in Ada acceptance by country
"Phaedrus" <  2008-03-18 14:58:15 
Re: Are there noticable differences in Ada acceptance by country
Mike Silva <snarflemik  2008-03-18 15:25:50 
Re: Are there noticable differences in Ada acceptance by country
Ludovic Brenta <ludovi  2008-03-18 23:50:00 
Re: Are there noticable differences in Ada acceptance by country
Thomas <thomas@[EMAIL   2008-03-19 12:42:13 
Re: Are there noticable differences in Ada acceptance by country
Thomas <thomas@[EMAIL   2008-03-19 08:42:17 
Re: Are there noticable differences in Ada acceptance by country
"Peter C. Chapin&quo  2008-03-19 06:35:16 
Re: Are there noticable differences in Ada acceptance by country
"Phaedrus" <  2008-03-19 13:21:21 
Re: Are there noticable differences in Ada acceptance by country
Dennis Lee Bieber <wlf  2008-03-19 23:08:06 
Re: Are there noticable differences in Ada acceptance by country
David Thompson <dave.t  2008-03-31 04:27:45 
Re: Are there noticable differences in Ada acceptance by country
DScott <Merlin43PhD@[E  2008-03-31 00:40:24 
Re: Are there noticable differences in Ada acceptance by country
Ludovic Brenta <ludovi  2008-03-19 05:09:07 
Re: Are there noticable differences in Ada acceptance by country
Ludovic Brenta <ludovi  2008-03-19 05:16:08 
Re: Are there noticable differences in Ada acceptance by country
"framefritti@[EMAIL   2008-03-19 05:51:51 
Re: Are there noticable differences in Ada acceptance by country
Tero Koskinen <tero.ko  2008-03-19 21:04:58 
Re: Are there noticable differences in Ada acceptance by country
Jean-Pierre Rosen <ros  2008-03-20 09:57:30 
Re: Are there noticable differences in Ada acceptance by country
svaa@[EMAIL PROTECTED]   2008-03-19 12:55:05 
Re: Are there noticable differences in Ada acceptance by country
"Phaedrus" <  2008-03-19 13:14:40 
Re: Are there noticable differences in Ada acceptance by country
Ivan Levashew <octagra  2008-03-20 07:34:56 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-19 21:37:59 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-19 21:52:47 
Re: Are there noticable differences in Ada acceptance by country
Simon Wright <simon.j.  2008-03-20 20:22:22 
Re: Are there noticable differences in Ada acceptance by country
"Dmitry A. Kazakov&q  2008-03-20 21:48:14 
Re: Are there noticable differences in Ada acceptance by country
Simon Wright <simon.j.  2008-03-20 22:17:18 
Re: Are there noticable differences in Ada acceptance by country
"Dmitry A. Kazakov&q  2008-03-21 08:52:38 
Re: Are there noticable differences in Ada acceptance by country
Simon Wright <simon.j.  2008-03-21 16:44:50 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-20 14:17:57 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-20 15:59:25 
Re: Are there noticable differences in Ada acceptance by country
tmoran@[EMAIL PROTECTED]   2008-03-20 20:54:04 
Re: Are there noticable differences in Ada acceptance by country
"Jeffrey R. Carter&q  2008-03-21 04:16:40 
Re: Are there noticable differences in Ada acceptance by country
Simon Wright <simon.j.  2008-03-21 16:41:21 
Re: Are there noticable differences in Ada acceptance by country
Simon Wright <simon.j.  2008-03-21 16:39:31 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-21 12:15:53 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-21 12:21:52 
Re: Are there noticable differences in Ada acceptance by country
Adam Beneschan <adam@[  2008-03-21 14:11:34 
Re: Are there noticable differences in Ada acceptance by country
Simon Wright <simon.j.  2008-03-22 07:02:38 
Re: Are there noticable differences in Ada acceptance by country
Maciej Sobczak <see.my  2008-03-22 07:00:03 
Subtypes to represent coordinate charts
Eric Hughes <eric.eh9@  2008-03-22 10:16:21 
Re: Are there noticable differences in Ada acceptance by country
gpriv@[EMAIL PROTECTED]   2008-03-24 11:01:49 
Re: Are there noticable differences in Ada acceptance by country
Tero Koskinen <tero.ko  2008-03-25 20:02:43 
Re: Are there noticable differences in Ada acceptance by country
Gautier <gautier@[EMAI  2008-03-25 20:57:51 

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tan12V112 Thu Jul 24 14:38:42 CDT 2008.