On Saturday, June 24, 2017 9:56:55 AM MDT Russel Winder via Digitalmars-d- learn wrote:
> I note that:
>
>   x.map!(…).array.sort
>
> is not valid, you have to have the parentheses on sort:
>
>   x.map!(…).array.sort()
>
> Why?

Because the built-in sort for arrays has been deprecated but not yet removed. So, for now, calling sort on an array without parens calls the built-in sort. Once the built-in sort has been removed, then this problem will go away.

- Jonathan M Davis