Struct with immutable arrays

@mkarikom wrote:

I need to be able to keep certain arrays of a mixed type (e.g. ImmutableN.n::Array{Int,1}) from being modified. Here is an example:

struct ImmutableN
  n::Array{Int64,1}
  cond::Float64
  ImmutableN(n) = new(n,rand(1)[1])
end

check = ImmutableN([1,2])
check.n[1] = 2 # works (bad)

I googled “julia immutable numeric array” and found this post, but I don’t understand what is going on here. Can someone please clarify this or suggest areas of the documentation that I should check?

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