How to convert 1-element Array{String,1} to string?

New to Julia
1

Hello,
I have this array:

unique(w.Hit)
1-element Array{String,1}:
 "AC_000006.1 Human adenovirus D"

I would like to get the letters from position 13 to the end but:

julia> unique(w.Hit)[13:length(unique(w.Hit))]
0-element Array{String,1}
julia> length(unique(w.Hit))
1

How can I convert unique(w.Hit) into a string?
Thanks

2

You need to simply extract the string from your Array, then apply the indexing as above.
If your w.Hit is always a 1-element Array, you can get your string as x=w.Hit[1].

1 Like
3

You could just do unique(w.Hit)[1] if that fits your usecase.

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4

And then, when indexing from position 13 to the end, you just write:

unique(w.Hit)[1][13:end]

There is no need to calculate length(unique(w.Hit)), which does a lot of unnecessary extra work, and will be slow.

5

Just to complement, since Julia 1.4 we have only (you do not need to import anything) that takes the only element of a collection and return it, throwing an exception if the collection has zero or more than one element.

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