Re: How can I use CArray efficiently?

The issue here is that SetSize says "the array is THIS big". If you don't
put anything
into it, nobody cares; you've said how big it is. It is that big. The
interpretation of
the CONTENT is irrelevant.

OTOH, if you did a SetSize(0, 100), then if you add 2 elements, the
GetSize is 2, but you
will have the same performance in doing Add up to 100.

Key here is that size is size. Growth capacity is a different concept (we
used to call it
"slack").

The elements are not "non-existent". They exist, because you told them to
exist by doing
the SetSize.

Note that if you do

CArray<t,t&>s;
s.SetSize(100);
s has 100 newly-constructed elements. They;'re there. This is an
efficient way of doing

CArray<t,t&>s;
t tinstance;
for(int i = 0; i < 100; i++)
   s.Add(tinstance);

so it should not be surprising that all the elements are there.