var v = []
v.push_back(3.4);
v.push_back(1);
v.push_back("bob");

assert_true(v[0] == 3.4)
assert_true(v[1] == 1)
assert_true(v[2] == "bob")

v[0] = 2.9
v[1] = 3
v[2] = "tom"

assert_true(v[0] == 2.9)
assert_true(v[1] == 3)
assert_true(v[2] == "tom")