I have a function that operates on an AbstractVector object `fs`, defined
like this:
function foo{T}(fs::AbstractVector{T})
out = zero(T)
for f in fs
# do some with out and f, e.g. sum
end
scale!(out, 42)
end
This code should be generic, and the eltype `T` could be a number, e.g., a
Float64, or a vector, e.g. Vector{Float64}. The function loops over the
entries of `fs` and then scales the `out` variable by a magic number 42.
The above definition works well when `T` is a vector, but fails when `T` is
a scalar with a MethodError, as scale! does not have a method when both
inputs are numbers. A possible method definition would be something along
the lines of
scale!(a::Number, b::Number) = a*b
Probably `scale!` is not the right way to implement this. Any suggestions
that apply to 0.4 and/or 0.5 are very welcome!
Thanks
