Some results on a project I am working on were slightly skewed and this is why:

```
template <typename Point>
struct Vector
{
double x, y;
Vector() = default; // doubles initialize to 0
Vector(Point& A, Point& B) : x(B.x - A.x), y(B.y - A.y) {}
void normalize()
{
x /= norm();
y /= norm();
}
double norm()
{
return std::sqrt(x * x + y * y);
}
};
```

An hour of my life to debug it that I’m never getting back. I should have guessed earlier because results were skewed only by the y-axis.