Try: Base.vcat{T}(x::Vararg{Union{T,Array{T,1}}}) = mixed_vcat(x...)
On Tuesday, October 20, 2015 at 11:44:15 AM UTC+2, Andras Niedermayer wrote:
>
> I've written an implementation of vcat for the special case of mixed
> scalar-vector parameters (e.g. vcat(1,[2,3],4)) using generated functions.
> I get a speed increase of a factor 70 and memory usage reduction by a
> factor 10. It also makes this special case of vcat type stable (e.g. the
> inferred type is Array{Int64,1} rather than Any for vcat(1,[2,3],4)). See
> https://gist.github.com/afniedermayer/947faadd362778d088d7
>
> I'd like to make a pull request (or at least provide a package that
> overloads vcat to start with), but I haven't figured out how to dispatch on
> mixed scalar-vector parameters.
> Base.vcat{T}(x::Union{T,Array{T,1}}...) = mixed_vcat(x...)
>
>
> doesn't work, see
> https://groups.google.com/forum/#!topic/julia-users/NCfxu7_9VR0
>
> Is there a way to dispatch on mixed scalar-vector parameters (besides
> dispatching in the generated function)?
>
