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162 lines
6.1 KiB
HTML
162 lines
6.1 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>operator[]</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" />
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<link rel="up" href="db_vector.html" title="Chapter 4. Db_vector" />
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<link rel="prev" href="stldb_vectorcapacity.html" title="capacity" />
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<link rel="next" href="stldb_vectorat.html" title="at" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">operator[]</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="stldb_vectorcapacity.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 4.
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Db_vector </th>
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<td width="20%" align="right"> <a accesskey="n" href="stldb_vectorat.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="stldb_vectoroperator_sqbrk"></a>operator[]</h2>
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</div>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="stldb_vectoroperator_sqbrk_details"></a>Function Details</h3>
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</div>
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</div>
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</div>
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<pre class="programlisting">
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reference operator[](index_type n)
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</pre>
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<p>Index operator, can act as both a left value and a right value. </p>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3597332"></a>Parameters</h4>
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</div>
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</div>
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</div>
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<div class="sect4" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h5 class="title"><a id="id3597487"></a>n</h5>
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</div>
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</div>
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</div>
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<p>The valid index of the vector. </p>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3597437"></a>Return Value</h4>
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</div>
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</div>
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</div>
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<p>The reference to the element at specified position. </p>
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</div>
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<pre class="programlisting">
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const_reference operator[](index_type n) const
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</pre>
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<p>Read only index operator. </p>
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<p>Only used as a right value, no need for assignment capability. The return value can't be used to update the element. </p>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3597526"></a>Parameters</h4>
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</div>
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</div>
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</div>
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<div class="sect4" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h5 class="title"><a id="id3597529"></a>n</h5>
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</div>
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</div>
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</div>
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<p>The valid index of the vector. </p>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3597446"></a>Return Value</h4>
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</div>
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</div>
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</div>
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<p>The const reference to the element at specified position. </p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3597316"></a>Group: Element access functions.</h3>
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</div>
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</div>
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</div>
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<p>The operator[] and <a class="link" href="stldb_vectorat.html" title="at">at()</a>
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only come from std::vector and std::deque, If you are using <a class="link" href="db_vector.html" title="Chapter 4. Db_vector">db_vector</a>
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as std::list, you don't have to set DB_RENUMBER flag to the backing database handle, and you get better performance, but at the same time you can't use these functions.</p>
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<p>Otherwise if you have set the DB_RENUMBER flag to the backing database handle, you can use this function though it is an std::list equivalent. </p>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3597357"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="db_vector.html" title="Chapter 4. Db_vector">db_vector</a>
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</p>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="stldb_vectorcapacity.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="db_vector.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="stldb_vectorat.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">capacity </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> at</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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