Opinions: The Best and Worst of D (for a lecture/talk I intend to give)

[Dominikus Dittes Scherkl via Digitalmars-d-learn]

On Wednesday, 9 July 2014 at 19:54:47 UTC, H. S. Teoh via 
Digitalmars-d-learn wrote:
> [...]
> The problem is that the function needs to return
> int, but given two uints, their difference may be
> greater than int.max, so simply subtracting them
> will not work. So the best I can come up with is:
>
> 	int compare2(int x, uint y)
> 	{
> 		return (x < 0) ? -1 :
> 			(y > int.max) ? -1 :
> 			(x - y);
> 	}
>
> which requires 2 comparisons.

Hmm. Diff works for compare(int,int).
So how about this:

int compare2(int x, uint y)
{
    return (y > int.max) ? -1 : (x - cast(int)y);
}

int compare2(uint x, int y)
{
    return (x > int.max) ? -1 : (cast(int)x - y);
}