[redis.git] / doc / ExistsCommand.html


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<b>ExistsCommand: Contents</b><br>&nbsp;&nbsp;<a href="#EXISTS _key_">EXISTS _key_</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a>
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                <h1 class="wikiname">ExistsCommand</h1>

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                    &iuml;&raquo;&iquest;#sidebar <a href="GenericCommandsSidebar.html">GenericCommandsSidebar</a><h1><a name="EXISTS _key_">EXISTS _key_</a></h1>
<i>Time complexity: O(1)</i><blockquote>Test if the specified key exists. The command returns&quot;0&quot; if the key exists, otherwise &quot;1&quot; is returned.Note that even keys set with an empty string as value willreturn &quot;1&quot;.</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">
1 if the key exists.
0 if the key does not exist.
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	2	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
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	18	<!-- This is a (PRE) block. Make sure it's left aligned or your toc title will be off. -->
	19	<b>ExistsCommand: Contents</b><br>  <a href="#EXISTS _key_">EXISTS _key_</a><br>    <a href="#Return value">Return value</a>
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	22	<h1 class="wikiname">ExistsCommand</h1>
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	24	<div class="summary">
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	29	ï»¿#sidebar <a href="GenericCommandsSidebar.html">GenericCommandsSidebar</a><h1><a name="EXISTS _key_">EXISTS _key_</a></h1>
	30	<i>Time complexity: O(1)</i><blockquote>Test if the specified key exists. The command returns"0" if the key exists, otherwise "1" is returned.Note that even keys set with an empty string as value willreturn "1".</blockquote>
	31	<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">
	32	1 if the key exists.
	33	0 if the key does not exist.
	34	</pre>
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