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48 lines
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HTML
48 lines
3.0 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<div id="page">
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<img style="border:none" alt="Redis Documentation" src="redis.png">
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<!-- This is a (PRE) block. Make sure it's left aligned or your toc title will be off. -->
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<b>LrangeCommand: Contents</b><br> <a href="#LRANGE _key_ _start_ _end_">LRANGE _key_ _start_ _end_</a><br> <a href="#Consistency with range functions in various programming languages">Consistency with range functions in various programming languages</a><br> <a href="#Out-of-range indexes">Out-of-range indexes</a><br> <a href="#Return value">Return value</a>
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<h1 class="wikiname">LrangeCommand</h1>
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<div class="summary">
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#sidebar <a href="ListCommandsSidebar.html">ListCommandsSidebar</a><h1><a name="LRANGE _key_ _start_ _end_">LRANGE _key_ _start_ _end_</a></h1>
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<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
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key. Start and end are zero-based indexes. 0 is the first element
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of 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
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of the list.<br/><br/><i>start</i> and <i>end</i> can also be negative numbers indicating offsets
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from the end of the list. For example -1 is the last element of
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the 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
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11 elements, that is, rightmost item is included. This <b>may or may not</b> be consistent with
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behavior 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
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the end of the list, or start <code name="code" class="python">></code> end, an empty list is returned.
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If end is over the end of the list Redis will threat it just like
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the 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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