//polyfill the _insert function
fn _insert(self, k, v) {
	var tmp1 = v;
	var tmp2;
	for (var i = k; i < self.length(); i++) {
		tmp2 = self[i];
		self[i] = tmp1;
		tmp1 = tmp2;
	}

	self.push(tmp1);
	return self;
}

var a = [1, 2, 3];

a = a.insert(1, 42);

assert a == [1, 42, 2, 3], "polyfill insert failed";


print "All good";