My original intention was to ask if there was any way we could declare a
const array who's elements are also constants. Since the following is
possible:
julia> const a = [1,2,3]
3-element Array{Int64,1}:
1
2
3
julia> a[1] = 2
2
and it would be useful to have arrays that are as constant as a variable
can be, without the need of declaring a new immutable type. For instance,
can we have an immutable Dict, who's fields AND their values are const?
Const arrays would be nice though.
On Monday, September 15, 2014 12:09:25 AM UTC+10, [email protected] wrote:
>
> I may have missed something but wouldn't
> immutable t
> x
> y
> end
>
> immutable t
> x
> y
> end
>
> type u
> x
> y
> end
> work?
>
> julia> myvar = t(1,2)
> julia> myvar.x=5
> ERROR: type t is immutable
> julia> v = u(t(1,2), t(3,4))
> u(t(1,2),t(3,4))
> julia> v.x
> t(1,2)
> v.x=t(5,6)
> t(5,6)
> v.x.x=42
> ERROR: type t is immutable
>
> If you really want to guaranty constant fields, you have to type them to
> some constant type.
>
