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HTML
117 lines
5.2 KiB
HTML
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<?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>Chapter 14. Iterator Classes for db_map and db_multimap</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="index.html" title="Berkeley DB C++ Standard Template Library API Reference" />
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<link rel="prev" href="stldb_vector_iteratorrefresh.html" title="refresh" />
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<link rel="next" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator" />
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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">Chapter 14.
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Iterator Classes for db_map and db_multimap </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_vector_iteratorrefresh.html">Prev</a> </td>
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<th width="60%" align="center"> </th>
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<td width="20%" align="right"> <a accesskey="n" href="db_map_base_iterator.html">Next</a></td>
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</table>
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<hr />
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</div>
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<div class="chapter" 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"><a id="db_map_iterators"></a>Chapter 14.
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Iterator Classes for db_map and db_multimap </h2>
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</div>
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</div>
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</div>
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<p><a class="link" href="db_map.html" title="Chapter 5. Db_map">db_map</a>
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has two iterator class templates -- <a class="link" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator">db_map_base_iterator</a>
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and <a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator">db_map_iterator</a>
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. </p>
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<p>They are the const iterator class and iterator class for <a class="link" href="db_map.html" title="Chapter 5. Db_map">db_map</a>
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and <a class="link" href="db_multimap.html" title="Chapter 6. Db_multimap">db_multimap</a>
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. <a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator">db_map_iterator</a>
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inherits from <a class="link" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator">db_map_base_iterator</a>
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.</p>
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<p>The two classes have identical behaviors to std::map::const_iterator and std::map::iterator respectively. Note that the common public member function behaviors are described in the <a class="link" href="db_base_iterator.html" title="Chapter 10. Db_base_iterator">db_base_iterator</a>
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section.</p>
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<p>The differences between the two classes are that the <a class="link" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator">db_map_base_iterator</a>
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can only be used to read its referenced value, while <a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator">db_map_iterator</a>
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allows both read and write access. If your access pattern is readonly, it is strongly recommended that you use the const iterator because it is faster and more efficient. </p>
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<h4><a id="id3532472"></a> Public Members </h4>
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<div class="informaltable">
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<colgroup>
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<col />
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<thead>
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<th>Member</th>
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<th>Description</th>
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</thead>
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<tbody>
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<tr>
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<td>
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<a class="link" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator">
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db_map_base_iterator</a>
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</td>
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<td>
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db_map_base_iterator</td>
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</tr>
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<tr>
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<td>
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<a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator">
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db_map_iterator</a>
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</td>
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<td>
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db_map_iterator</td>
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</tr>
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</tbody>
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</table>
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</div>
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<h4><a id="id3528726"></a>
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Group</h4>
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<p>
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<a class="xref" href="dbstl_iterators.html" title="Chapter 9. Dbstl Iterator Classes">
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Dbstl Iterator Classes </a>
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</p>
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<p>
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</p>
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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_vector_iteratorrefresh.html">Prev</a> </td>
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<td width="20%" align="center"> </td>
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<td width="40%" align="right"> <a accesskey="n" href="db_map_base_iterator.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">refresh </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"> Chapter 15.
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Db_map_base_iterator </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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