Array operation for computing the dot product?

[bearophile]

Andrei Alexandrescu:
> Before we solve the difficult problem of naming the thing could we first 
> go through the trivial part of optimizing it under its current name.

In this case finding a good syntax before D2 is out of alpha stage is more important than implementing that efficiently.
The user interface is often very important for the usage and success of a machine. And the interface of a computer language is its syntax.

Bye,
bearophile