Matrix class
Frits van Bommel
fvbommel at REMwOVExCAPSs.nl
Thu May 10 01:08:02 PDT 2007
Bill Baxter wrote:
> Frits van Bommel wrote:
>> Bill Baxter wrote:
>>> Silverling wrote:
>> >> Bill Baxter wrote:
>>>>> Storage format?
>>>> Currently Type[row][col].
>>>
>>> Got it. You may be better off with Type[row*col]. Type[row][col] is
>>> an array of col pointers to 1D arrays of rows, rather than densely
>>> packed memory.
>>
>> No, it's definitely densely packed memory. Static arrays always put
>> their elements directly where you put the array itself, "inline".
>>
>> Only dynamic (Type[]) and associative (Type[Type2]) arrays use
>> "hidden" pointers.
>
> Ok, but he said it was going to be resizeable. Does that change your
> answer?
Hmm... Right. I don't see how he could do that for non-square matrices
without allocating a new matrix; if general resizing is implemented, he
must've used a different storage format (not Type[row*col] either, but
Type[] with length (row*col) would work). Maybe he was just inaccurate
with in his answer...
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