Re: [julia-users] Re: Julia equivalent to a static member function in C++/MATLAB
Yes, this is all clear. Joel
[julia-users] Re: Julia equivalent to a static member function in C++/MATLAB
You probably know this, but the way dispatch works in Julia, it will look for a function matching the signatures. Since, presumably, MyMatrix is not in base Julia, that zeros function will do whatever you want it to do because you have yo implement it.
[julia-users] Re: Julia equivalent to a static member function in C++/MATLAB
> In Julia, you can do the same thing, it is just spelled differently. You
> could do
x = zeros(MyMatrix, 3, 4)
where you have defined
Base.zeros(::Type{MyMatrix}, m, n) = .
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Of course in Julia you can do anything you want.
However, is it recommended to redefine the meaning of generic functions?
I would assume zeros(MyMatrix,3,4) creates a 3x4 Array{MyMatrix,2}
[julia-users] Re: Julia equivalent to a static member function in C++/MATLAB
Great, thanks! Joel
[julia-users] Re: Julia equivalent to a static member function in C++/MATLAB
On Friday, September 25, 2015 at 11:56:46 AM UTC-4, Joel Andersson wrote:
>
> Hi,
>
> In C++ or in MATLAB I would use static member functions to keep the
> constructors nice and simple, e.g.
> class MyMatrix {
> public:
> static MyMatrix zeros(int n, int m);
> static MyMatrix ones(int n, int m);
> static MyMatrix eye(int n);
> ...
> };
>
> Which allows me to create class instances with an IMO natural syntax,
> which should also be relatively efficient due to return value optimization:
> MyMatrix x = MyMatrix::zeros(3,4);
>
>
In Julia, you can do the same thing, it is just spelled differently. You
could do
x = zeros(MyMatrix, 3, 4)
where you have defined
Base.zeros(::Type{MyMatrix}, m, n) = .
