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antirez
2009-04-08 13:42:34 +02:00
parent 0bd06e524a
commit 7f4e28e750
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doc/ScardCommand.html
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<div class="narrow">
<h1><a name="SCARD _key_">SCARD _key_</a></h1>
<i>Time complexity O(1)</i><blockquote>Return the set cardinality (number of elements). If the <i>key</i> does notexist 0 is returned, like for empty sets. If the <i>key</i> does not holda set value -1 is returned. Client libraries should raise an errorwhen -1 is returned instead to pass the value to the caller.</blockquote>
<i>Time complexity O(1)</i><blockquote>Return the set cardinality (number of elements). If the <i>key</i> does notexist 0 is returned, like for empty sets.</blockquote>
<h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Integer reply</a>, specifically:<br/><br/><pre class="codeblock python" name="code">
the cardinality (number of elements) of the set as an integer `&gt;=` 0 if the operation succeeded
-2 if the specified key does not hold a set value
the cardinality (number of elements) of the set as an integer.
</pre><h2><a name="See also">See also</a></h2>
<ul><li> <a href="SremCommand.html">SREM</a></li><li> <a href="SismemberCommand.html">SISMEMBER</a></li><li> <a href="ScardCommand.html">SCARD</a></li><li> <a href="SmembersCommand.html">SMEMBERS</a></li><li> <a href="SinterCommand.html">SINTER</a></li><li> <a href="SinterstoreCommand.html">SINTERSTORE</a></li></ul>
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