<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Chapter 14. Iterator Classes for db_map and db_multimap</title> <link rel="stylesheet" href="apiReference.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> <link rel="up" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> <link rel="prev" href="stldb_vector_iteratorrefresh.html" title="refresh" /> <link rel="next" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Chapter 14. Iterator Classes for db_map and db_multimap </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="stldb_vector_iteratorrefresh.html">Prev</a> </td> <th width="60%" align="center"> </th> <td width="20%" align="right"> <a accesskey="n" href="db_map_base_iterator.html">Next</a></td> </tr> </table> <hr /> </div> <div class="chapter" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title"><a id="db_map_iterators"></a>Chapter 14. Iterator Classes for db_map and db_multimap </h2> </div> </div> </div> <p><a class="link" href="db_map.html" title="Chapter 5. Db_map">db_map</a> 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> and <a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator">db_map_iterator</a> . </p> <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> and <a class="link" href="db_multimap.html" title="Chapter 6. Db_multimap">db_multimap</a> . <a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator">db_map_iterator</a> inherits from <a class="link" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator">db_map_base_iterator</a> .</p> <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> section.</p> <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> 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> 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> <h4><a id="id1562370"></a> Public Members </h4> <div class="informaltable"> <table border="1" width="80%"> <colgroup> <col /> <col /> </colgroup> <thead> <tr> <th>Member</th> <th>Description</th> </tr> </thead> <tbody> <tr> <td> <a class="link" href="db_map_base_iterator.html" title="Chapter 15. Db_map_base_iterator"> db_map_base_iterator</a> </td> <td> db_map_base_iterator</td> </tr> <tr> <td> <a class="link" href="db_map_iterator.html" title="Chapter 16. Db_map_iterator"> db_map_iterator</a> </td> <td> db_map_iterator</td> </tr> </tbody> </table> </div> <h4><a id="id1562732"></a> Group</h4> <p> <a class="xref" href="dbstl_iterators.html" title="Chapter 9. Dbstl Iterator Classes"> Dbstl Iterator Classes </a> </p> <p> </p> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="stldb_vector_iteratorrefresh.html">Prev</a> </td> <td width="20%" align="center"> </td> <td width="40%" align="right"> <a accesskey="n" href="db_map_base_iterator.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top"> refresh </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Chapter 15. Db_map_base_iterator </td> </tr> </table> </div> </body> </html>