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arraystypesjuliahierarchy
José Manuel
José Manuel

Reputation: 101

Can Julia handle typed arrays with elements of more than 1 type?

I want to have a constructor/method accept an array, but that array can only contain elements of 2 different types. For example:

Array{Union{Int64, String}} = [1, 2, "3"]

But now I want to create the array as [1, 2, "3"] (not specifying the type) and have it automatically be accepted by the constructor who's expecting arguments of type ::Array{Union{Int64, String}}. What happens is that [1, 2, "3"] is by default of type Any, and therefore not accepted by my constructor.

Upvotes: 1

Views: 120

Answers (1)

Cameron Bieganek
Cameron Bieganek

Reputation: 7654

You can make an array like that as follows:

julia> Union{Int64, String}[1, 2, "3"]
3-element Array{Union{Int64, String},1}:
 1   
 2   
  "3"

The documentation for this in the manual can be found here. To quote the manual,

An array with a specific element type can be constructed using the syntax T[A, B, C, ...]. This will construct a 1-d array with element type T, initialized to contain elements A, B, C, etc.

Upvotes: 1

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