replication asynchronous SYNC information in INFO output
[redis.git] / doc / LrangeCommand.html
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ab72b483 19<b>LrangeCommand: Contents</b><br>&nbsp;&nbsp;<a href="#LRANGE _key_ _start_ _end_">LRANGE _key_ _start_ _end_</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Consistency with range functions in various programming languages">Consistency with range functions in various programming languages</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Out-of-range indexes">Out-of-range indexes</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a>
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22 <h1 class="wikiname">LrangeCommand</h1>
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29 &iuml;&raquo;&iquest;#sidebar <a href="ListCommandsSidebar.html">ListCommandsSidebar</a><h1><a name="LRANGE _key_ _start_ _end_">LRANGE _key_ _start_ _end_</a></h1>
ab72b483 30<i>Time complexity: O(start+n) (with n being the length of the range and start being the start offset)</i>Return the specified elements of the list stored at the specified
31key. Start and end are zero-based indexes. 0 is the first element
32of the list (the list head), 1 the next element and so on.<br/><br/>For example LRANGE foobar 0 2 will return the first three elements
33of the list.<br/><br/><i>start</i> and <i>end</i> can also be negative numbers indicating offsets
34from the end of the list. For example -1 is the last element of
35the list, -2 the penultimate element and so on.<h2><a name="Consistency with range functions in various programming languages">Consistency with range functions in various programming languages</a></h2>Note that if you have a list of numbers from 0 to 100, LRANGE 0 10 will return
3611 elements, that is, rightmost item is included. This <b>may or may not</b> be consistent with
37behavior of range-related functions in your programming language of choice (think Ruby's Range.new, Array#slice or Python's range() function).<br/><br/>LRANGE behavior is consistent with one of Tcl.<h2><a name="Out-of-range indexes">Out-of-range indexes</a></h2>Indexes out of range will not produce an error: if start is over
38the end of the list, or start <code name="code" class="python">&gt;</code> end, an empty list is returned.
39If end is over the end of the list Redis will threat it just like
40the last element of the list.<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.
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