Prime Factors: Step 8

We’re still refactoring, keeping all four test passing.

We’re not using the std::vector<int> in all cases.

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

It occurs to me that we can move the first if down, and only do the last v.push_back(n) when n is not 1. That way we lose that first return statement.

Let’s do that and click Next.