doc/SubstrCommand.html

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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>SubstrCommand: Contents</b><br>&nbsp;&nbsp;<a href="#SUBSTR _key_ _start_ _end_">SUBSTR _key_ _start_ _end_</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Examples">Examples</a>
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  22                 <h1 class="wikiname">SubstrCommand</h1>
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  29                     &iuml;&raquo;&iquest;#sidebar <a href="StringCommandsSidebar.html">StringCommandsSidebar</a><h1><a name="SUBSTR _key_ _start_ _end_">SUBSTR _key_ _start_ _end_</a></h1>
  30 <i>Time complexity: O(start+n) (with start being the start index and n the total length of the requested range). Note that the lookup part of this command is O(1) so for small strings this is actually an O(1) command.</i><blockquote>Return a subset of the string from offset <i>start</i> to offset <i>end</i>(both offsets are inclusive).Negative offsets can be used in order to provide an offset starting fromthe end of the string. So -1 means the last char, -2 the penultimate andso forth.</blockquote>
  31 <blockquote>The function handles out of range requests without raising an error, butjust limiting the resulting range to the actual length of the string.</blockquote>
  32 <h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Bulk reply</a><h2><a name="Examples">Examples</a></h2><pre class="codeblock python" name="code">
  33 redis&gt; set s &quot;This is a string&quot;
  34 OK
  35 redis&gt; substr s 0 3
  36 &quot;This&quot;
  37 redis&gt; substr s -3 -1
  38 &quot;ing&quot;
  39 redis&gt; substr s 0 -1
  40 &quot;This is a string&quot;
  41 redis&gt; substr s 9 100000
  42 &quot; string&quot;
  43 </pre>
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