From: Ruby Student <ruby.student@...>
Date: 2009-04-09T21:59:44+09:00
Subject: Re: Array question - How dynamic is dynamic?

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On Tue, Apr 7, 2009 at 11:59 AM, Robert Klemme
<shortcutter@googlemail.com>wrote:

> 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
>
>
Thank you all for your input and suggestions!

-- 
Ruby Student

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