[STL]How do I delete a vector

Thanks, this might do the trick, will test it out later.

Can you please comment on the virtual memory issue?

Also,if using memcpy to copy the contents of a buffer to this vector could possibly result in an erroneous copy given the "windows being low on virual memory" warning?

You could also try using a deque. A vector of 50mb needs 50mb of contiguous memory, a deque does not. The disadvantage is that you can''t use memcopy with a deque. You should instead use std::copy(begin-of-source,past-end-of-source,deque.begin()); from the header.

You shouldn''t be using memcpy with a std::vector.

As for the virtual memory being low, are you sure you don''t have memory leaks ?

quote:

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Original post by George2
You shouldn''t be using memcpy with a std::vector.

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What can I use instead of memcpy? Any suggestions?

I still suspect that there is an error in the copying that is resulting in such values such as null in a large part of the vector, I dont know to to ascertain this for sure though

The low memory warning is almost certainly because it has to find 50Mb of contiguous memory. This is going to be very unlikely. Either store pointers to the actual data (unless that''s what you''re doing already) which would take up less room and the real data could be all over the place. Or use a deque. I''d go with the deque as it can just be a drop in replacement.

quote:

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Original post by twanvl
You could also try using a deque. A vector of 50mb needs 50mb of contiguous memory, a deque does not. The disadvantage is that you can''t use memcopy with a deque. You should instead use std::copy(begin-of-source,past-end-of-source,deque.begin()); from the header.

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erm... that will crash...

...unless you''ve sized the deque to be the correct size first.

or use a back_inserter:
std::copy(begin-of-source,past-end-of-source,std::back_inserter(deque));

I''d create a deque and then swap it in though. So there are a number of ways to do these things.

std::deque<int> myDeque;
std::vector<int> myBigVector;
//add stuff to myBigVector;

//...

std::deque<int> tempDeque(myBigVector.begin(), myBigVector.end());
myDeque.swap(tempDeque);

A nice template version to trim capacity for vectors and
strings etc.

template <typename Cont>
inline Cont& trim_capacity(Cont &c)
{
	Cont(c).swap(c);
	return c;
}