Ary Borenszweig wrote:
Norbert Nemec wrote:
Hi everybody,
thinking about array expressions, I have stumbled over an interesting
challenge for which I still have no idea:
Consider the mathematical sum notation:
\sum_i a_i*b_i
here, the variable i is defined only at the scope inside the expression.
A analogous D syntax could be something like
sum!(i)(a[i]*b[i])
where sum would have to be some kind of template that takes i as a
name parameter and then defines it as variable inside the scope of the
second expression.
You are missing i's initial and ending values.
I think it should be something like:
sum!("i", 0, n)(a[i]*b[i])
I assumed them to default to the array boundaries, but that does not
really matter at this point.
