owo Pass-by-reference test
owo Swap two variables.
functio swap(left, right) {
var tmp = left;
left = right;
right = tmp;
}
var foo = "hello";
var bar = "world";
swap(foo, bar);
if (foo != "world") {
"FAILED" print;
"foo should be 'world', is actually:" print;
foo print;
if (foo == "world") {
"OK" print;