Dynamic multidimensional arrays

[Bellum]

On 7/5/2011 2:00 AM, Jonathan M Davis wrote:
> On 2011-07-04 23:56, Jonathan M Davis wrote:
>> On 2011-07-04 23:42, Bellum wrote:
>>> Can anyone point me in the right direction for doing something like this
>>>
>>> in D:
>>>       char[][] anArray;
>>>       int rows, cols;
>>>
>>>       ...
>>>
>>>       anArray = new char[rows][cols];
>>>
>>> It isn't possible in this way because "rows cannot be read at compile
>>> time", which seems to me to be the point of dynamic arrays. :P
>>
>> auto anArray = new char[][](rows, cols);
>>
>> Putting the numbers directly in the brackets tries to create a static array
>> once you get beyond the first dimension. So,
>>
>> auto anArary = new char[4][5];
>>
>> would create a dynamic array of length for with elements which are static
>> arrays of length 5. If you want it to by dynamic all the way, you need to
>> put the dimensions in the parens like above. Personally, I _never_ put
>> them in the brackets, even when the dynamic array has just one dimension.
>> It's just simpler to always put them in the parens and not worry about it.
>
> Correction,
>
> auto anArray = new char[4][5];
>
> would create a dynamic array of length 5 of static arrays with length 4,
> though
>
> auto anArray = new char[][](4, 5);
>
> does create a dynamic array of length 4 of dynamic arrays of length 5. It
> quickly gets confusing when dealing with dimensions and static arrays IMHO.
>
> - Jonathan M Davis

Wow, that is confusing. I think I'll stick to using parans, too; thanks 
for the tip!