Better idea for double list comprehension?

[Stanislav Blinov]

On Saturday, 18 January 2014 at 07:56:15 UTC, Stanislav Blinov 
wrote:

> Although that won't give you a string[], but in a dchar[][].

...but that is solvable:

auto strings = array(cross("ab","12").map!"to!string(a)"());

Or maybe even by providing additional overload:

auto cross(alias fun,R1,R2)(R1 a, R2 b) {
   return cross(a,b).map!fun();
}

auto strings = array(cross!"to!string(a)"("ab","12"));