Hi
I’m trying to get the unique values into A variable bellow, but unique(A) isn’t showing the correct result, is repeating A. How could I get the real result: [1,2,4,5,6,7,8,10,11] ?
Thanks in advance!!!
A
5-element Vector{Vector{Int64}}:
[1, 2, 4]
[5, 6, 7, 8, 9, 11]
[5, 6, 7, 8, 9, 10, 11]
[5, 6, 7, 8, 9, 10]
[5, 6, 7, 8, 9]
unique(A)
5-element Vector{Vector{Int64}}:
[1, 2, 4]
[5, 6, 7, 8, 9, 11]
[5, 6, 7, 8, 9, 10, 11]
[5, 6, 7, 8, 9, 10]
[5, 6, 7, 8, 9]
unique(Iterators.flatten(A))
is a bit more verbose and a bit more efficient.
I always forget about flatten…thank you for that!
Your answer was fine too, it shows the splat operator which is forgotten often too. I think it doesn’t deserve to be deleted 
The answers are spot on. I just wanted to add what was going on in the original version:
unique(A) does show the “correct” result, since it finds all unique elements in a collection. From the outermost layer, there is a vector A and all its elements are indeed different, so unique(A) == A.
What was the answer with splat?
unique(vcat(A...))
?
It was, you can see when clicking on the pen symbol on the post.
Most people would probably recommend reduce(vcat, A) instead of the splat.