Allocating an empty non null associative arary

[Mike Parker]

On Tuesday, 31 March 2020 at 02:51:11 UTC, Superstar64 wrote:
> I want to be modify an associative array by reference from 
> another function. However null associative arrays are pass by 
> value. How do I generically create an empty associative array?
> ---
> import std.stdio;
>
>
> void addElement(int[int] data){
> 	data[0] = 0;
> }

void addElement(ref int[int] data){
	data[0] = 0;
}