How do I collapse an array of sets to a single set containing all unique set elements in the following way?
Array_of_sets = Set{String}[Set(["EUR", "GBP", "USD"]), Set(["AUD"])]
# do something to Array_of_sets which produces
Set{String}(["EUR", "GBP", "USD", "AUD"])
union, vcat and unique do not seem to work in this case.
So sets are already unique:
julia> S = Set(["a", "b"])
Set(["b", "a"])
julia> push!(S, "a")
Set(["b", "a"])
Therefore, no unique needed:
julia> A = Set{String}[Set(["EUR", "GBP", "USD"]), Set(["EUR", "AUD"])]
julia> reduce(union!, A)
Set(["EUR", "GBP", "AUD", "USD"])
I would convert the sets to arrays, and vcat them:
Array_of_sets = Set{String}[Set(["EUR", "GBP", "USD"]), Set(["AUD"])]
Array_of_arrays = map(collect, Array_of_sets)
Set(vcat(Array_of_arrays...))
> Set{String}(["EUR", "GBP", "USD", "AUD"])
Edit: But then I'm not as clever as @stillearningsomething