Commit 924aa408 authored by antirez's avatar antirez
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<b>ZaddCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZADD _key_ _score_ _member_ (Redis &gt;">ZADD _key_ _score_ _member_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#See also">See also</a>
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<h1 class="wikiname">ZaddCommand</h1>
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<h1><a name="ZADD _key_ _score_ _member_ (Redis &gt;">ZADD _key_ _score_ _member_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity O(log(N)) with N being the number of elements in the sorted set</i><blockquote>Add the specified <i>member</i> having the specifeid <i>score</i> to the sortedset stored at <i>key</i>. If <i>member</i> is already a member of the sorted setthe score is updated, and the element reinserted in the right position toensure sorting. If <i>key</i> does not exist a new sorted set with the specified_member_ as sole member is crated. If the key exists but does not hold asorted set value an error is returned.</blockquote>
<blockquote>The score value can be the string representation of a double precision floatingpoint number.</blockquote>
<blockquote>For an introduction to sorted sets check the <a href="RedisSortedSets.html">Redis sorted sets</a> page.</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 new element was added
0 if the element was already a member of the sorted set and the score was updated
</pre><h2><a name="See also">See also</a></h2>
<ul><li> <a href="ZremCommand.html">ZREM</a></li><li> <a href="ZrangeCommand.html">ZRANGE</a></li><li> <a href="ZrangeCommand.html">ZREVRANGE</a></li><li> <a href="ZrangebyscoreCommand.html">ZRANGEBYSCORE</a></li><li> <a href="ZcardCommand.html">ZCARD</a></li><li> <a href="ZscoreCommand.html">ZSCORE</a></li></ul>
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<b>ZcardCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZCARD _key_ (Redis &gt;">ZCARD _key_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#See also">See also</a>
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<h1 class="wikiname">ZcardCommand</h1>
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<h1><a name="ZCARD _key_ (Redis &gt;">ZCARD _key_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity O(1)</i><blockquote>Return the sorted set cardinality (number of elements). If the <i>key</i> does notexist 0 is returned, like for empty sorted 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.
</pre><h2><a name="See also">See also</a></h2>
<ul><li> <a href="ZaddCommand.html">ZADD</a></li><li> <a href="ZremCommand.html">ZREM</a></li><li> <a href="ZrangeCommand.html">ZRANGE</a></li><li> <a href="ZrangeCommand.html">ZREVRANGE</a></li><li> <a href="ZrangebyscoreCommand.html">ZRANGEBYSCORE</a></li><li> <a href="ZscoreCommand.html">ZSCORE</a></li></ul>
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<b>ZrangeCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZRANGE _key_ _start_ _end_ (Redis &gt;">ZRANGE _key_ _start_ _end_ (Redis &gt;</a><br>&nbsp;&nbsp;<a href="#ZREVRANGE _key_ _start_ _end_ (Redis &gt;">ZREVRANGE _key_ _start_ _end_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#See also">See also</a>
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<h1 class="wikiname">ZrangeCommand</h1>
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<h1><a name="ZRANGE _key_ _start_ _end_ (Redis &gt;">ZRANGE _key_ _start_ _end_ (Redis &gt;</a></h1> 1.1) =
<h1><a name="ZREVRANGE _key_ _start_ _end_ (Redis &gt;">ZREVRANGE _key_ _start_ _end_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity: O(log(N))+O(M) (with N being the number of elements in the sorted set and M the number of elements requested)</i><blockquote>Return the specified elements of the sorted set at the specifiedkey. The elements are considered sorted from the lowerest to the highestscore when using ZRANGE, and in the reverse order when using ZREVRANGE.Start and end are zero-based indexes. 0 is the first elementof the sorted set (the one with the lowerest score when using ZRANGE), 1the next element by score and so on.</blockquote>
<blockquote>_start_ and <i>end</i> can also be negative numbers indicating offsetsfrom the end of the sorted set. For example -1 is the last element ofthe sorted set, -2 the penultimate element and so on.</blockquote>
<blockquote>Indexes out of range will not produce an error: if start is overthe end of the sorted set, or start <code name="code" class="python">&gt;</code> end, an empty list is returned.If end is over the end of the sorted set Redis will threat it just likethe last element of the sorted set.</blockquote>
<h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Multi bulk reply</a>, specifically a list of elements in the specified range.<h2><a name="See also">See also</a></h2>
<ul><li> <a href="ZaddCommand.html">ZADD</a></li><li> <a href="ZremCommand.html">ZREM</a></li><li> <a href="ZrangeCommand.html">ZRANGE</a></li><li> <a href="ZrangeCommand.html">ZREVRANGE</a></li><li> <a href="ZcardCommand.html">ZCARD</a></li><li> <a href="ZscoreCommand.html">ZSCORE</a></li></ul>
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<b>ZrangebyscoreCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZRANGEBYSCORE _key_ _min_ _max_ (Redis &gt;">ZRANGEBYSCORE _key_ _min_ _max_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#See also">See also</a>
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<h1 class="wikiname">ZrangebyscoreCommand</h1>
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<h1><a name="ZRANGEBYSCORE _key_ _min_ _max_ (Redis &gt;">ZRANGEBYSCORE _key_ _min_ _max_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity: O(log(N))+O(M) with N being the number of elements in the sorted set and M the number of elements matching the min and max score</i><blockquote>Return the all the elements in the sorted set at key with a score between_min_ and <i>max</i> (including elements with score equal to min or max).</blockquote>
<blockquote>The elements having the same score are returned sorted lexicographically asASCII strings (this follows from a property of Redis sorted sets and does notinvolve further computation).</blockquote>
<h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Multi bulk reply</a>, specifically a list of elements in the specified score range.<h2><a name="See also">See also</a></h2><ul><li> <a href="ZaddCommand.html">ZADD</a></li><li> <a href="ZremCommand.html">ZREM</a></li><li> <a href="ZrangeCommand.html">ZRANGE</a></li><li> <a href="ZrangeCommand.html">ZREVRANGE</a></li><li> <a href="ZcardCommand.html">ZCARD</a></li><li> <a href="ZscoreCommand.html">ZSCORE</a></li></ul>
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<b>ZremCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZREM _key_ _member_ (Redis &gt;">ZREM _key_ _member_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#See also">See also</a>
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<h1 class="wikiname">ZremCommand</h1>
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<h1><a name="ZREM _key_ _member_ (Redis &gt;">ZREM _key_ _member_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity O(log(N)) with N being the number of elements in the sorted set</i><blockquote>Remove the specified <i>member</i> from the sorted set value stored at <i>key</i>. If_member_ was not a member of the set no operation is performed. If <i>key</i>does not not hold a set value an error is returned.</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 new element was removed
0 if the new element was not a member of the set
</pre><h2><a name="See also">See also</a></h2><ul><li> <a href="ZaddCommand.html">ZADD</a></li><li> <a href="ZrangeCommand.html">ZRANGE</a></li><li> <a href="ZrangeCommand.html">ZREVRANGE</a></li><li> <a href="ZrangebyscoreCommand.html">ZRANGEBYSCORE</a></li><li> <a href="ZcardCommand.html">ZCARD</a></li><li> <a href="ZscoreCommand.html">ZSCORE</a></li></ul>
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<b>ZscoreCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZSCORE _key_ _element_ (Redis &gt;">ZSCORE _key_ _element_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#See also">See also</a>
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<h1 class="wikiname">ZscoreCommand</h1>
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<h1><a name="ZSCORE _key_ _element_ (Redis &gt;">ZSCORE _key_ _element_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity O(1)</i><blockquote>Return the score of the specified element of the sorted set at key.If the specified element does not exist in the sorted set, or the keydoes not exist at all, a special 'nil' value is returned.</blockquote>
<h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Bulk reply</a><pre class="codeblock python" name="code">
the score (a double precision floating point number) represented as string.
</pre><h2><a name="See also">See also</a></h2>
<ul><li> <a href="ZaddCommand.html">ZADD</a></li><li> <a href="ZremCommand.html">ZREM</a></li><li> <a href="ZrangeCommand.html">ZRANGE</a></li><li> <a href="ZrangeCommand.html">ZREVRANGE</a></li><li> <a href="ZrangebyscoreCommand.html">ZRANGEBYSCORE</a></li><li> <a href="ZcardCommand.html">ZCARD</a></li></ul>
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<b>index: Contents</b><br>&nbsp;&nbsp;<a href="#Redis Documentation">Redis Documentation</a><br>&nbsp;&nbsp;<a href="#HOWTOs about selected features">HOWTOs about selected features</a><br>&nbsp;&nbsp;<a href="#Hacking">Hacking</a><br>&nbsp;&nbsp;<a href="#Videos">Videos</a>
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<h1 class="wikiname">index</h1>
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<h1><a name="Redis Documentation">Redis Documentation</a></h1>Hello! The followings are pointers to different parts of the Redis Documentation.<br/><br/><ul><li> <a href="README.html">The README</a> is the best starting point to know more about the project.</li><li> <a href="QuickStart.html">This short Quick Start</a> provides a five minutes step-by-step istructions on how to download, compile, run and test the basic workings of a Redis server.</li><li> <a href="CommandReference.html">The command reference</a> is a description of all the Redis commands with links to command specific pages.</li><li> <a href="TwitterAlikeExample.html">This is a tuturial about creating a Twitter clone using *only* Redis as database, no relational DB at all is used</a>, it is a good start to understand the key-value database paradigm.</li><li> <a href="Features.html">The features page</a> (currently in draft) is a good start to understand the strength and limitations of Redis.</li><li> <a href="Benchmarks.html">The benchmark page</a> is about the speed performances of Redis.</li><li> <a href="FAQ.html">Our FAQ</a> contains of course some answers to common questions about Redis.</li></ul>
<h1><a name="HOWTOs about selected features">HOWTOs about selected features</a></h1><ul><li> <a href="ReplicationHowto.html">The Redis Replication HOWTO</a> is what you need to read in order to understand how Redis master <code name="code" class="python">&lt;-&gt;</code> slave replication works.</li><li> <a href="AppendOnlyFileHowto.html">The Append Only File HOWTO</a> explains how the alternative Redis durability mode works. AOF is an alternative to snapshotting on disk from time to time (the default).</li></ul>
<h1><a name="Hacking">Hacking</a></h1>
<ul><li> <a href="ProtocolSpecification.html">The Protocol Specification</a> is all you need in order to implement a Redis client library for a missing language. PHP, Python, Ruby and Erlang are already supported.</li></ul>
<h1><a name="Videos">Videos</a></h1><ul><li> <a href="http://mwrc2009.confreaks.com/13-mar-2009-19-24-redis-key-value-nirvana-ezra-zygmuntowicz.html" target="_blank">watch the Ezra Zygmuntowicz talk about Redis</a> to know the most important Redis ideas in few minutes.</li></ul>
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