Operating on a Variadic Function Parameter Set

["Nordlöw" via Digitalmars-d-learn]

On Sunday, 16 November 2014 at 11:40:16 UTC, Nordlöw wrote:
> If I have a variadic function such as in
>
>     haystack.find(needles)
>
> what options do I have for defining needles in compile-time 
> outside of this expression and call find() with this definition 
> as arguments possibly multiple-times?

I just found out that Tuple member expand does what I want here.