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>front</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_vector.html" title="Chapter��4.�� Db_vector" /> 11 <link rel="prev" href="stldb_vectorat.html" title="at" /> 12 <link rel="next" href="stldb_vectorback.html" title="back" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center"> 19front 20</th> 21 </tr> 22 <tr> 23 <td width="20%" align="left"><a accesskey="p" href="stldb_vectorat.html">Prev</a>��</td> 24 <th width="60%" align="center">Chapter��4.�� 25 Db_vector </th> 26 <td width="20%" align="right">��<a accesskey="n" href="stldb_vectorback.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_vectorfront"></a> 36front 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"> 51reference��front() 52 </pre> 53 <div class="sect3" lang="en" xml:lang="en"> 54 <div class="titlepage"></div> 55 <p>Return a reference to the first element. </p> 56 <p></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="id1546988"></a> 63Return Value</h4> 64 </div> 65 </div> 66 </div> 67 <p>Return a reference to the first element. </p> 68 </div> 69 <div class="sect3" lang="en" xml:lang="en"> 70 <div class="titlepage"> 71 <div> 72 <div> 73 <h4 class="title"><a id="id1546989"></a> 74See Also</h4> 75 </div> 76 </div> 77 </div> 78 <p> 79 </p> 80 <p><a class="ulink" href="http://www.cplusplus.com/reference/stl/vector/front.html" target="_top">http://www.cplusplus.com/reference/stl/vector/front.html</a> </p> 81 <p> </p> 82 </div> 83 <pre class="programlisting"> 84const_reference��front()��const 85 </pre> 86 <div class="sect3" lang="en" xml:lang="en"> 87 <div class="titlepage"></div> 88 <p>Return a const reference to the first element. </p> 89 <p>The return value can't be used to update the element. </p> 90 </div> 91 <div class="sect3" lang="en" xml:lang="en"> 92 <div class="titlepage"> 93 <div> 94 <div> 95 <h4 class="title"><a id="id1547073"></a> 96Return Value</h4> 97 </div> 98 </div> 99 </div> 100 <p>Return a const reference to the first element. </p> 101 </div> 102 <div class="sect3" lang="en" xml:lang="en"> 103 <div class="titlepage"> 104 <div> 105 <div> 106 <h4 class="title"><a id="id1547010"></a> 107See Also</h4> 108 </div> 109 </div> 110 </div> 111 <p> 112 </p> 113 <p><a class="ulink" href="http://www.cplusplus.com/reference/stl/vector/front.html" target="_top">http://www.cplusplus.com/reference/stl/vector/front.html</a> </p> 114 <p> </p> 115 </div> 116 </div> 117 <div class="sect2" lang="en" xml:lang="en"> 118 <div class="titlepage"> 119 <div> 120 <div> 121 <h3 class="title"><a id="id1547011"></a> 122Group: Element access functions.</h3> 123 </div> 124 </div> 125 </div> 126 <p>The operator[] and <a class="link" href="stldb_vectorat.html" title="at">at()</a> 127 only come from std::vector and std::deque, If you are using <a class="link" href="db_vector.html" title="Chapter��4.�� Db_vector">db_vector</a> 128 as std::list, you don't have to set DB_RENUMBER flag to the backing database handle, and you get better performance, but at the same time you can't use these functions.</p> 129 <p>Otherwise if you have set the DB_RENUMBER flag to the backing database handle, you can use this function though it is an std::list equivalent. </p> 130 </div> 131 <div class="sect2" lang="en" xml:lang="en"> 132 <div class="titlepage"> 133 <div> 134 <div> 135 <h3 class="title"><a id="id1546966"></a> 136Class</h3> 137 </div> 138 </div> 139 </div> 140 <p> 141 <a class="link" href="db_vector.html" title="Chapter��4.�� Db_vector"> 142 db_vector</a> 143 </p> 144 </div> 145 </div> 146 <div class="navfooter"> 147 <hr /> 148 <table width="100%" summary="Navigation footer"> 149 <tr> 150 <td width="40%" align="left"><a accesskey="p" href="stldb_vectorat.html">Prev</a>��</td> 151 <td width="20%" align="center"> 152 <a accesskey="u" href="db_vector.html">Up</a> 153 </td> 154 <td width="40%" align="right">��<a accesskey="n" href="stldb_vectorback.html">Next</a></td> 155 </tr> 156 <tr> 157 <td width="40%" align="left" valign="top"> 158at 159��</td> 160 <td width="20%" align="center"> 161 <a accesskey="h" href="index.html">Home</a> 162 </td> 163 <td width="40%" align="right" valign="top">�� 164back 165</td> 166 </tr> 167 </table> 168 </div> 169 </body> 170</html> 171