From: Robert Klemme <shortcutter@...>
Date: 2009-04-08T00:59:11+09:00
Subject: Re: Array question - How dynamic is dynamic?

On 07.04.2009 15:38, Mark Thomas wrote:
> On Apr 7, 8:50 am, Ruby Student <ruby.stud...@gmail.com> wrote:
>> Main Array:
>>
>> mA = [
>> [A, B, C, D],
>> [B, A, C, D],
>> [D, C, B, A],
>> [C, A, D, B]
>> ]
>>
>> Sub Arrays:
>> sAr0 (sub array row 0 to row n, where n is 3 for this case)
>> sAr0 = [A, B, C, D]
>> sAr1 = [B, A, C, D]
>> sAr2 = [D, C, B, A]
>> sAr3 = [C, A, D, B]
> 
> I suggest you use the Matrix class (in the standard library).

Are you sure this works?  It seems, when I create a row Vector of the 
Matrix it is read only.  At least []= is defined private.

But I agree to the general advice to use a special class for this and 
not try to work with nested Arrays.  That's what OO is for.  Defining a 
two dimensional matrix with Vector proxies isn't too hard.

Kind regards

	robert