Object oriented programming and interfaces

[Daniel Kozak]

You can do something like this:

interface Medoid(T) {
    float distance( T other );
    uint id() const @property;
}

class Item : Medoid!(Item) {
    float distance( Item m ) { return 0.;}
    uint id() const @property { return 1; }
}

class MedoidClassification {
    this(T:Medoid!T)(T[] list) {}
    //Medoid[][] getClusters() {...}
}

void main() {
    auto items = new Item[10];
    auto mc = new MedoidClassification( items );
}

On Tue, Dec 5, 2017 at 8:47 AM, Dirk via Digitalmars-d-learn <
digitalmars-d-learn at puremagic.com> wrote:

> The distance function is implementation dependend and can only be computed
> between two objects of the same class (in this example the class is Item).
>
> My goal is to write a module for a k-medoids clustering algorithm. The
> class MedoidClassification shall be able to partition a list of objects
> from the same class, which implement the Medoid interface.
>
> My current approach is this (which does not work):
>
> interface Medoid {
>     float distance( Medoid other );
>     uint id() const @property;
> }
>
> class Item : Medoid {
>     float distance( Item m ) {...}
>     uint id() const @property {...}
> }
>
> class MedoidClassification {
>     this( Medoid[] list ) {...}
>     Medoid[][] getClusters() {...}
> }
>
> void main() {
>     Item[10] items;
>     auto mc = MedoidClassification( items );
> }
>
>
> What would be a good way to implement this?
>
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