New implementation

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Other implementations
void print_seq(const auto& ...xs)
{
 (std::for_each(std::begin(xs), std::end(xs), 
           [](const auto& x) { std::cout << x; }), ...);
}

 std::list xs { "hi", "there", "world" }, ys { "lo" "thar" };

 print_seq(xs, ys);
items1.ForEach(Console.WriteLine);
items2.ForEach(Console.WriteLine);
import std.range;
import std.algorithm.iteration;
import std.stdio;
chain(items1, items2).each!writeln;
print *,items1,items2
for _, v := range items1 {
	fmt.Println(v)
}
for _, v := range items2 {
	fmt.Println(v)
}
mapM_ print $ items1 ++ items2
for (let item of items1) console.log(item)
for (let item of items2) console.log(item)
(map nil #'print (append items1 items))
for i := 0 to items1.Count-1 do writeln(items1[i]);
for i := 0 to items2.Count-1 do writeln(items2[i]);
print for @items1, @items2;
for x in items1 + items2:
    print(x)
[items1, items2].each{|ar| ar.each{|item| p item }}
items1.chain(items2).each{|item| puts item}
for i in item1.chain(item2) {
    print!("{} ", i);
}
(map (lambda (x)
       (display x)
       (newline))
     (append items1 items2))