Question

I’m a Java programer lost in C++ and pointers 😀

I have an array of pointers to Bucket-Objects

Bucket<E>* index = new Bucket<E>[2];

I initialize it like this:

index[0] points to Bucket1
index[1] points to Bucket2

And then I want to double the size of the array and link the additional entries like this:

index[0] points to Bucket1
index[1] points to Bucket2
index[2] points to Bucket1
index[3] points to Bucket2

I have this code so far, which generates copies of the Bucket-Objects and I don’t want that!

for (size_t i = 0; i < newSize; ++i)
{
    if (i < oldIndexSize)
       newIndex[i] = index[i];
    else
       newIndex[i] = index[i - oldIndexSize];

} 

Answer 1

I have an array of pointers to Bucket-Objects

No, you have a pointer to an array of Bucket objects. An array of pointers to Bucket objects would look like this:

Bucket<E> * index[2];

A dynamically allocated array of pointers to bucket objects would be declared like this:

Bucket<E> ** index = new Bucket<E>*[N];

But what you should probably be using is a vector of shared pointers to bucket objects, like this:

std::vector<std::shared_ptr<Bucket<E>>> index;