Can you add Vector.to2D?

[hikikomori82]

I'm working in 2D only but Line.pointClosestTo returns 3D vector with z being 0, can you add Vector.to2D() function that would drop third element of a vector, right now there is Vector.to3D which adds zero, this would remove it. It is problem because when I want to use it later:

Vector.create([2, 0]).subtract(Vector.create([1, 0, 0])) - returns null

In order to make it work I need to use temp variable:
var t = Vector.create([1, 0, 0]);
t = Vector.create([t[0], t[1]]);
Vector.create([2, 0]).subtract(t);

Which is unwieldy but more importantly cannot be chained.