When using collect
, map
, vcat
etc..., on Array
s of mixed type (for example Int
and Float64
), the automatic eltype
promotion is to use promote_type
. So vcat(rand(3), rand(1:3, 3))
will return a Vector{Float64}
Is there a generic way to get a Union
instead, i.e. that vcat
returns an array of eltype
Union{Int, Float64}
?
Hm, I guess you could write things like
function union_vcat(x::AbstractArray{T}, y::AbstractArray{U}) where {T, U}
Union{T, U}[x; y]
end
and so on.
julia> union_vcat(rand(3), rand(1:3, 3))
6-element Vector{Union{Float64, Int64}}:
0.5169156455130914
0.19690004688154739
0.14011289835785867
3
3
3
Last updated: Nov 22 2024 at 04:41 UTC