Finding position of a value in an array

[MoonlightSentinel]

On Monday, 30 December 2019 at 14:30:12 UTC, Ron Tarrant wrote:
> I was trying to do this with an array of pointers, but I get an 
> error (which suggests to me that I don't know what data type a 
> pointer is):
>
> It's not a ulong? Have I forgotten so much?

D disallows implicit conversion from integers to pointers and 
hence they cannot be compared. You would need to explicitly cast 
your ulong to an appropriate pointer type