1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>Chapter��14.�� Iterator Classes for db_map and db_multimap</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> 10 <link rel="up" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> 11 <link rel="prev" href="stldb_vector_iteratorrefresh.html" title="refresh" /> 12 <link rel="next" href="db_map_base_iterator.html" title="Chapter��15.�� Db_map_base_iterator" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">Chapter��14.�� 19 Iterator Classes for db_map and db_multimap </th> 20 </tr> 21 <tr> 22 <td width="20%" align="left"><a accesskey="p" href="stldb_vector_iteratorrefresh.html">Prev</a>��</td> 23 <th width="60%" align="center">��</th> 24 <td width="20%" align="right">��<a accesskey="n" href="db_map_base_iterator.html">Next</a></td> 25 </tr> 26 </table> 27 <hr /> 28 </div> 29 <div class="chapter" lang="en" xml:lang="en"> 30 <div class="titlepage"> 31 <div> 32 <div> 33 <h2 class="title"><a id="db_map_iterators"></a>Chapter��14.�� 34 Iterator Classes for db_map and db_multimap </h2> 35 </div> 36 </div> 37 </div> 38 <p><a class="link" href="db_map.html" title="Chapter��5.�� Db_map">db_map</a> 39 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> 40 and <a class="link" href="db_map_iterator.html" title="Chapter��16.�� Db_map_iterator">db_map_iterator</a> 41. </p> 42 <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> 43 and <a class="link" href="db_multimap.html" title="Chapter��6.�� Db_multimap">db_multimap</a> 44. <a class="link" href="db_map_iterator.html" title="Chapter��16.�� Db_map_iterator">db_map_iterator</a> 45 inherits from <a class="link" href="db_map_base_iterator.html" title="Chapter��15.�� Db_map_base_iterator">db_map_base_iterator</a> 46.</p> 47 <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> 48 section.</p> 49 <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> 50 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> 51 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> 52 <h4><a id="id1562370"></a> Public Members </h4> 53 <div class="informaltable"> 54 <table border="1" width="80%"> 55 <colgroup> 56 <col /> 57 <col /> 58 </colgroup> 59 <thead> 60 <tr> 61 <th>Member</th> 62 <th>Description</th> 63 </tr> 64 </thead> 65 <tbody> 66 <tr> 67 <td> 68<a class="link" href="db_map_base_iterator.html" title="Chapter��15.�� Db_map_base_iterator"> 69db_map_base_iterator</a> 70</td> 71 <td> 72db_map_base_iterator</td> 73 </tr> 74 <tr> 75 <td> 76<a class="link" href="db_map_iterator.html" title="Chapter��16.�� Db_map_iterator"> 77db_map_iterator</a> 78</td> 79 <td> 80db_map_iterator</td> 81 </tr> 82 </tbody> 83 </table> 84 </div> 85 <h4><a id="id1562732"></a> 86Group</h4> 87 <p> 88<a class="xref" href="dbstl_iterators.html" title="Chapter��9.�� Dbstl Iterator Classes"> 89 Dbstl Iterator Classes </a> 90</p> 91 <p> 92</p> 93 </div> 94 <div class="navfooter"> 95 <hr /> 96 <table width="100%" summary="Navigation footer"> 97 <tr> 98 <td width="40%" align="left"><a accesskey="p" href="stldb_vector_iteratorrefresh.html">Prev</a>��</td> 99 <td width="20%" align="center">��</td> 100 <td width="40%" align="right">��<a accesskey="n" href="db_map_base_iterator.html">Next</a></td> 101 </tr> 102 <tr> 103 <td width="40%" align="left" valign="top"> 104refresh 105��</td> 106 <td width="20%" align="center"> 107 <a accesskey="h" href="index.html">Home</a> 108 </td> 109 <td width="40%" align="right" valign="top">��Chapter��15.�� 110 Db_map_base_iterator </td> 111 </tr> 112 </table> 113 </div> 114 </body> 115</html> 116