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>is_hash</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="db_map.html" title="Chapter��5.�� Db_map" /> 11 <link rel="prev" href="stldb_maprend.html" title="rend" /> 12 <link rel="next" href="stldb_mapbucket_count.html" title="bucket_count" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center"> 19is_hash 20</th> 21 </tr> 22 <tr> 23 <td width="20%" align="left"><a accesskey="p" href="stldb_maprend.html">Prev</a>��</td> 24 <th width="60%" align="center">Chapter��5.�� 25 Db_map </th> 26 <td width="20%" align="right">��<a accesskey="n" href="stldb_mapbucket_count.html">Next</a></td> 27 </tr> 28 </table> 29 <hr /> 30 </div> 31 <div class="sect1" lang="en" xml:lang="en"> 32 <div class="titlepage"> 33 <div> 34 <div> 35 <h2 class="title" style="clear: both"><a id="stldb_mapis_hash"></a> 36is_hash 37</h2> 38 </div> 39 </div> 40 </div> 41 <div class="sect2" lang="en" xml:lang="en"> 42 <div class="titlepage"> 43 <div> 44 <div> 45 <h3 class="title"><a id="func_details"></a> 46Function Details</h3> 47 </div> 48 </div> 49 </div> 50 <pre class="programlisting"> 51bool��is_hash()��const 52 </pre> 53 <div class="sect3" lang="en" xml:lang="en"> 54 <div class="titlepage"></div> 55 <p>Get container category. </p> 56 <p>Determines whether this container object is a std::map<> equivalent(when returns false) or that of hash_map<> class(when returns true). This method is not in stl, but it may be called by users because some operations are not supported by both type(map/hash_map) of containers, you need to call this function to distinguish the two types. dbstl will not stop you from calling the wrong methods of this class. </p> 57 </div> 58 <div class="sect3" lang="en" xml:lang="en"> 59 <div class="titlepage"> 60 <div> 61 <div> 62 <h4 class="title"><a id="id1551269"></a> 63Return Value</h4> 64 </div> 65 </div> 66 </div> 67 <p>Returns true if this container is a hash container based on a Berkeley DB hash database; returns false if it is based on a Berkeley DB btree database. </p> 68 </div> 69 </div> 70 <div class="sect2" lang="en" xml:lang="en"> 71 <div class="titlepage"> 72 <div> 73 <div> 74 <h3 class="title"><a id="id1551514"></a> 75Group: Metadata Functions</h3> 76 </div> 77 </div> 78 </div> 79 <p>These functions return metadata about the container. </p> 80 </div> 81 <div class="sect2" lang="en" xml:lang="en"> 82 <div class="titlepage"> 83 <div> 84 <div> 85 <h3 class="title"><a id="id1551751"></a> 86Class</h3> 87 </div> 88 </div> 89 </div> 90 <p> 91 <a class="link" href="db_map.html" title="Chapter��5.�� Db_map"> 92 db_map</a> 93 </p> 94 </div> 95 </div> 96 <div class="navfooter"> 97 <hr /> 98 <table width="100%" summary="Navigation footer"> 99 <tr> 100 <td width="40%" align="left"><a accesskey="p" href="stldb_maprend.html">Prev</a>��</td> 101 <td width="20%" align="center"> 102 <a accesskey="u" href="db_map.html">Up</a> 103 </td> 104 <td width="40%" align="right">��<a accesskey="n" href="stldb_mapbucket_count.html">Next</a></td> 105 </tr> 106 <tr> 107 <td width="40%" align="left" valign="top"> 108rend 109��</td> 110 <td width="20%" align="center"> 111 <a accesskey="h" href="index.html">Home</a> 112 </td> 113 <td width="40%" align="right" valign="top">�� 114bucket_count 115</td> 116 </tr> 117 </table> 118 </div> 119 </body> 120</html> 121