erldis:set(Client, "pippo", "pluto"),
erldis:sadd(Client, "pippo", "paperino"),
% foo doesn't exist, the result will be nil
erldis:lrange(Client, "foo", 1, 2),
erldis:lrange(Client, "pippo", 1, 2),
erldis:set(Client, "pippo", "pluto"),
erldis:sadd(Client, "pippo", "paperino"),
% foo doesn't exist, the result will be nil
erldis:lrange(Client, "foo", 1, 2),
erldis:lrange(Client, "pippo", 1, 2),