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1
I have a list of vectors (vector of vectors) like the following:
A 2-element Vector{Vector{Int64}}: A= [347229118, 1954075737, 6542148346,347229123, 1954075753, 6542148341] [247492691, 247490813, -2796091443606465490, 247491615, 247492910, 247491620, -4267071114472318843, 747753505]
the goal is to have them all in just one vector. I did try collect, A[:], vec(A), flatten(A) but it still returns 2-element Vector{Vector{Int64}}
I don't know what command I should use. Is there anything
Assuming your input data is:
julia> x = [[1, 2], [3, 4], [5, 6]]
3-element Vector{Vector{Int64}}:
[1, 2]
[3, 4]
[5, 6]
here are some natural options you have.
Option 1: use Iterators.flatten:
julia> collect(Iterators.flatten(x))
6-element Vector{Int64}:
1
2
3
4
5
6
You can omit collect in which case you get a lazy iterator over the source data which is more memory efficient.
Option 2: use vcat:
julia> reduce(vcat, x)
6-element Vector{Int64}:
1
2
3
4
5
6
You could also write:
julia> vcat(x...)
6-element Vector{Int64}:
1
2
3
4
5
6
but splatting might get problematic if your x vector is very long. In which case I recommend you to use the reduce function as shown above.
