Redis: Is there a way to add to sorted set only if set is exists?
<p>I am wondering if there is a way to check if a redis sorted set is exists already. if sorted set is exists then add element to it, other way nothing will happen.</p>

<p>because of doing this with <code>pipeline</code> so it tacks a lot cost to check if the sorted set is exist, every time out of the redis.</p>