<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html> <head> <link type="text/css" rel="stylesheet" href="style.css" /> </head> <body> <div id="page"> <div id='header'> <a href="index.html"> <img style="border:none" alt="Redis Documentation" src="redis.png"> </a> </div> <div id="pagecontent"> <div class="index"> <!-- This is a (PRE) block. Make sure it's left aligned or your toc title will be off. --> <b>ZaddCommand: Contents</b><br> <a href="#ZADD _key_ _score_ _member_ (Redis >">ZADD _key_ _score_ _member_ (Redis ></a><br> <a href="#Return value">Return value</a> </div> <h1 class="wikiname">ZaddCommand</h1> <div class="summary"> </div> <div class="narrow"> #sidebar <a href="SortedSetCommandsSidebar.html">SortedSetCommandsSidebar</a><h1><a name="ZADD _key_ _score_ _member_ (Redis >">ZADD _key_ _score_ _member_ (Redis ></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="IntroductionToRedisDataTypes.html">Introduction to Redis data types</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> </div> </div> </div> </body> </html>