Better idea for double list comprehension?

[Stanislav Blinov]

I'd say

import std.algorithm;

auto cross(R1,R2)(R1 a, R2 b) {
	return cartesianProduct(a,b).map!"[a[0]]~[a[1]]"();
}

You can always:

import std.array;

auto strings = array(cross("ab","12"));


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