Prime Factors: Step 7

We’re refactoring, keeping all four test passing.

Here’s the first step of the refactoring, just adding a std::vector<int>.

static std::vector<int> Of(int n)
{
    std::vector<int> v;
    if (n == 1)
        return v;
    if (n == 4)
        return {2, 2};
    v.push_back(n);
    return v;
}

We’re using the vector in the case of all numbers other than 4. Let’s refactor some more and use it for 4, too.

Let’s add that and click Next.