Re: Confusion about `Random`

[jwatson-CO-edu via Digitalmars-d-learn]

On Friday, 23 December 2022 at 07:25:23 UTC, Salih Dincer wrote:
You can try using static this.
```d
import std.random;

static this() { } // can try using

Mt19937 rnd;
void init_random() {
  rnd = Random(unpredictableSeed);
}

double rand01() {
    return uniform(0, 1.0, rnd);
}

void main()
{
  init_random();

  struct Atom { double num; }
  alias atom = Atom* function();
  atom[string] primitiveSymbols = [
    "rand" : () => new Atom(rand01)
  ];
  import std.stdio;
  writeln(*primitiveSymbols["rand"]()); // Atom(0.630001)
}
```
SDB@79

I would still like to learn about this idiom.  Can you tell me 
what it means and when I should use it?