title: Is it possible to set expiration for a Redis set?
body: <p>On Redis 6.0</p>
  <pre><code>SADD foo 1
  SADD foo 2
  SMEMBERS foo     # [1, 2]
  EXISTS foo       # 0
  EXPIRE foo 10    # 0
  </code></pre>
  <p>Setting &quot;EXPIRE&quot; on a set just doesn't work for me, in fact it looks like even &quot;EXISTS&quot; doesn't think the key exists at all.</p>
  <p>Is it impossible to set expiration for a Redis set?</p>