libdb/docs/api_reference/STL/stldb_mapis_hash.html
2011-12-19 19:07:10 -05:00

107 lines
4.3 KiB
HTML
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<?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>is_hash</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="db_map.html" title="Chapter 5.  Db_map" />
<link rel="prev" href="stldb_maprend.html" title="rend" />
<link rel="next" href="stldb_mapbucket_count.html" title="bucket_count" />
</head>
<body>
<div xmlns="" class="navheader">
<div class="libver">
<p>Library Version 11.2.5.2</p>
</div>
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">is_hash</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="stldb_maprend.html">Prev</a> </td>
<th width="60%" align="center">Chapter 5. 
Db_map </th>
<td width="20%" align="right"> <a accesskey="n" href="stldb_mapbucket_count.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="stldb_mapis_hash"></a>is_hash</h2>
</div>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="stldb_mapis_hash_details"></a>Function Details</h3>
</div>
</div>
</div>
<pre class="programlisting">
bool is_hash() const
</pre>
<p>Get container category. </p>
<p>Determines whether this container object is a std::map&lt;&gt; equivalent(when returns false) or that of hash_map&lt;&gt; 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>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3602193"></a>Return Value</h4>
</div>
</div>
</div>
<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>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="id3602162"></a>Group: Metadata Functions</h3>
</div>
</div>
</div>
<p>These functions return metadata about the container. </p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="id3602184"></a>Class</h3>
</div>
</div>
</div>
<p>
<a class="link" href="db_map.html" title="Chapter 5.  Db_map">db_map</a>
</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="stldb_maprend.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="db_map.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="stldb_mapbucket_count.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">rend </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> bucket_count</td>
</tr>
</table>
</div>
</body>
</html>