How to convert this function into a template ?

[Vinod K Chandran via Digitalmars-d-learn]

Hi all,
I have a function and i want to convert this into a template so 
that i can use this function for more than one data type.
This is my function.
```D
void ArrayAdd( ref int[] x, int value) {
    int index = x.length ;
    x.length += 1 ;
    x[index] = value ;
}
```