Iterating over an odd (even) elements only in a range-based loop

Question

Suppose we have a plain array (or other container which support range based loops):

const int N = 8;
int arr[N] = {0, 1, 2, 3, 4, 5, 6, 7};

Usi

Answer 1

There is a ready-made solution for this problem in the Range-v3. I think this can be useful if you don’t want to write your own implementation or need more flexibility (f.e. arbitrary stride)

#include 

void example()
{
    int data[8] = {0, 1, 2, 3, 4, 5, 6, 7};
    for (auto i : ranges::view::stride(data, 2))
    {
        std::cout << i << std::endl;
    }
}

(copied from @hlt comment)