The analogue of "fill-pointer" in D

[Kagamin via Digitalmars-d-learn]

On Monday, 18 May 2015 at 08:21:38 UTC, Dennis Ritchie wrote:
> Hi,
>
> In Common Lisp, there is such a thing as a fill-pointer 
> (Example 5):
> http://www.tutorialspoint.com/lisp/lisp_arrays.htm
>
> Does D some equivalent?

Data stored in the array is indicated by the array length 
property, use capacity to figure out extra available space: 
http://dlang.org/phobos/object.html#.capacity