2011-09-13 17:44:24 +00:00
<?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 > at< / 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_vector.html" title = "Chapter / >
< link rel = "prev" href = "stldb_vectoroperator_sqbrk.html" title = "operator[]" / >
< link rel = "next" href = "stldb_vectorfront.html" title = "front" / >
< / 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" > at< / th >
< / tr >
< tr >
< td width = "20%" align = "left" > < a accesskey = "p" href = "stldb_vectoroperator_sqbrk.html" > Prev< / a > < / td >
< th width = "60%" align = "center" > Chapter
Db_vector < / th >
< td width = "20%" align = "right" > < a accesskey = "n" href = "stldb_vectorfront.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_vectorat" > < / a > at< / h2 >
< / div >
< / div >
< / div >
< div class = "sect2" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
< h3 class = "title" > < a id = "stldb_vectorat_details" > < / a > Function Details< / h3 >
< / div >
< / div >
< / div >
< pre class = "programlisting" >
reference at(index_type n)
< / pre >
< p > Index function. < / p >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3597388" > < / a > Parameters< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< div class = "sect4" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h5 class = "title" > < a id = "id3597585" > < / a > n< / h5 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The valid index of the vector. < / p >
< / div >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3597290" > < / a > Return Value< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The reference to the element at specified position, can act as both a left value and a right value. < / p >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3597406" > < / a > See Also< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p >
< / p >
< p > < a class = "ulink" href = "http://www.cplusplus.com/reference/stl/vector/at/" target = "_top" > http://www.cplusplus.com/reference/stl/vector/at/< / a > < / p >
< p >
< / p >
< / div >
< pre class = "programlisting" >
const_reference at(index_type n) const
< / pre >
< p > Read only index function. < / p >
< p > Only used as a right value, no need for assignment capability. The return value can't be used to update the element. < / p >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3597374" > < / a > Parameters< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< div class = "sect4" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h5 class = "title" > < a id = "id3597377" > < / a > n< / h5 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The valid index of the vector. < / p >
< / div >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3597569" > < / a > Return Value< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The const reference to the element at specified position. < / p >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3597576" > < / a > See Also< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p >
< / p >
< p > < a class = "ulink" href = "http://www.cplusplus.com/reference/stl/vector/at/" target = "_top" > http://www.cplusplus.com/reference/stl/vector/at/< / a > < / p >
< p >
< / p >
< / div >
< / div >
< div class = "sect2" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h3 class = "title" > < a id = "id3597370" > < / a > Group: Element access functions.< / h3 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The operator[] and < a class = "link" href = "stldb_vectorat.html" title = "at" > at()< / a >
only come from std::vector and std::deque, If you are using < a class = "link" href = "db_vector.html" title = "Chapter > db_vector< / a >
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 >
< 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 >
< / div >
< div class = "sect2" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h3 class = "title" > < a id = "id3597651" > < / a > Class< / h3 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p >
< a class = "link" href = "db_vector.html" title = "Chapter > db_vector< / 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_vectoroperator_sqbrk.html" > Prev< / a > < / td >
< td width = "20%" align = "center" >
< a accesskey = "u" href = "db_vector.html" > Up< / a >
< / td >
< td width = "40%" align = "right" > < a accesskey = "n" href = "stldb_vectorfront.html" > Next< / a > < / td >
< / tr >
< tr >
< td width = "40%" align = "left" valign = "top" > operator[] < / td >
< td width = "20%" align = "center" >
< a accesskey = "h" href = "index.html" > Home< / a >
< / td >
< td width = "40%" align = "right" valign = "top" > < / td >
< / tr >
< / table >
< / div >
< / body >
< / html >
