Does anyone know an efficient way to add NTuples in Julia?
I can do it using recursive functions, but for various reasons this is not
efficient in my context. I really miss something like tuple(a[i] + b[i] for
i in 1:N) to create the resulting tuple all in one go (here a and b would
be tuples).
The compiler doesn't do badly with recursive functions for handling tuples
in very straightforward situations, but for example, if I want to create an
immutable type based on a tuple the compiler doesn't seem to be able to
handle the necessary optimisations. At least, that is what I infer from the
timings. Consider
immutable bill{N}
d::NTuple{N, Int}
end
and I want to add two bill's together. If I have to add the tuples
themselves using recursive functions, then I no longer seem to be able to
do something like:
A[i] = B[i] + C[i] efficiently, where A, B and C are arrays whose elements
are of type bill.
I know how to handle tuples via arrays, but for efficiency reasons I
certainly don't want to do that, e.g. tuple([a[i] + b[i] for i in 1:N]...).
Bill.
