Initializing an associative array into a variable when it is created

[Danilo]

> But is there really no other way to immediately point a static 
> array to a variable?

Looks like this is not implemented yet:

- https://dlang.org/spec/hash-map.html#static_initialization

Would a static constructor be okay? This way the static data
is not initialized at every `new` and object creation is faster.

- https://dlang.org/spec/class.html#static-constructor

```d
import std.stdio;

class C {
     static string[][string] arr;

     static this() { // static constructor
         arr = [
             "one": ["abc", "def"],
             "two": ["ghi", "jkl"],
             "three": ["mno", "pqr"]
         ];
     }

     this() { // object constructor
     }

     void show(string value) {
         writeln(
             value,
             ": ",
             arr[value],
             ": ",
             arr[value][0],
             ", ",
             arr[value][1]
         );
     }
}

void main() {
     auto var = new C;
     var.show("one");
     var.show("two");
     var.show("three");
}
```