; padding: 5px;"> <a href="ScardCommand.html">SCARD</a>  </td><td style="border: 1px solid #aaa; padding: 5px;"> <i>key</i>  </td><td style="border: 1px solid #aaa; padding: 5px;">  Return the number of elements (the cardinality) of the Set at key  </td></tr><tr><td style="border: 1px solid #aaa; padding: 5px;"> <a href="SismemberCommand.html">SISMEMBER</a>  </td><td style="border: 1px solid #aaa; padding: 5px;"> <i>key</i> <i>member</i>  </td><td style="border: 1px solid #aaa; padding: 5px;">  Test if the 