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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
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+<title>QValueVector Class</title>
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+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
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+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QValueVector Class Reference</h1>
+
+<p>The QValueVector class is a value-based template class that provides a dynamic array.
+<a href="#details">More...</a>
+<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when Qt is built with thread support.</p>
+<p><tt>#include &lt;<a href="qvaluevector-h.html">qvaluevector.h</a>&gt;</tt>
+<p><a href="qvaluevector-members.html">List of all member functions.</a>
+<h2>Public Members</h2>
+<ul>
+<li class=fn>typedef T&nbsp;<a href="#value_type"><b>value_type</b></a></li>
+<li class=fn>typedef value_type&nbsp;*&nbsp;<a href="#pointer"><b>pointer</b></a></li>
+<li class=fn>typedef const&nbsp;value_type&nbsp;*&nbsp;<a href="#const_pointer"><b>const_pointer</b></a></li>
+<li class=fn>typedef value_type&nbsp;*&nbsp;<a href="#iterator"><b>iterator</b></a></li>
+<li class=fn>typedef const&nbsp;value_type&nbsp;*&nbsp;<a href="#const_iterator"><b>const_iterator</b></a></li>
+<li class=fn>typedef value_type&nbsp;&amp;&nbsp;<a href="#reference"><b>reference</b></a></li>
+<li class=fn>typedef const&nbsp;value_type&nbsp;&amp;&nbsp;<a href="#const_reference"><b>const_reference</b></a></li>
+<li class=fn>typedef size_t&nbsp;<a href="#size_type"><b>size_type</b></a></li>
+<li class=fn>typedef ptrdiff_t&nbsp;<a href="#difference_type"><b>difference_type</b></a></li>
+<li class=fn><a href="#QValueVector"><b>QValueVector</b></a> ()</li>
+<li class=fn><a href="#QValueVector-2"><b>QValueVector</b></a> ( const&nbsp;QValueVector&lt;T&gt;&nbsp;&amp;&nbsp;v )</li>
+<li class=fn><a href="#QValueVector-3"><b>QValueVector</b></a> ( size_type&nbsp;n, const&nbsp;T&nbsp;&amp;&nbsp;val = T ( ) )</li>
+<li class=fn><a href="#QValueVector-4"><b>QValueVector</b></a> ( std::vector&lt;T&gt;&nbsp;&amp;&nbsp;v )</li>
+<li class=fn><a href="#QValueVector-5"><b>QValueVector</b></a> ( const&nbsp;std::vector&lt;T&gt;&nbsp;&amp;&nbsp;v )</li>
+<li class=fn><a href="#~QValueVector"><b>~QValueVector</b></a> ()</li>
+<li class=fn>QValueVector&lt;T&gt; &amp; <a href="#operator-eq"><b>operator=</b></a> ( const&nbsp;QValueVector&lt;T&gt;&nbsp;&amp;&nbsp;v )</li>
+<li class=fn>QValueVector&lt;T&gt; &amp; <a href="#operator-eq-2"><b>operator=</b></a> ( const&nbsp;std::vector&lt;T&gt;&nbsp;&amp;&nbsp;v )</li>
+<li class=fn>size_type <a href="#size"><b>size</b></a> () const</li>
+<li class=fn>bool <a href="#empty"><b>empty</b></a> () const</li>
+<li class=fn>size_type <a href="#capacity"><b>capacity</b></a> () const</li>
+<li class=fn>iterator <a href="#begin"><b>begin</b></a> ()</li>
+<li class=fn>const_iterator <a href="#begin-2"><b>begin</b></a> () const</li>
+<li class=fn>const_iterator <a href="#constBegin"><b>constBegin</b></a> () const</li>
+<li class=fn>iterator <a href="#end"><b>end</b></a> ()</li>
+<li class=fn>const_iterator <a href="#end-2"><b>end</b></a> () const</li>
+<li class=fn>const_iterator <a href="#constEnd"><b>constEnd</b></a> () const</li>
+<li class=fn>reference <a href="#at"><b>at</b></a> ( size_type&nbsp;i, bool&nbsp;*&nbsp;ok = 0 )</li>
+<li class=fn>const_reference <a href="#at-2"><b>at</b></a> ( size_type&nbsp;i, bool&nbsp;*&nbsp;ok = 0 ) const</li>
+<li class=fn>reference <a href="#operator[]"><b>operator[]</b></a> ( size_type&nbsp;i )</li>
+<li class=fn>const_reference <a href="#operator[]-2"><b>operator[]</b></a> ( size_type&nbsp;i ) const</li>
+<li class=fn>reference <a href="#front"><b>front</b></a> ()</li>
+<li class=fn>const_reference <a href="#front-2"><b>front</b></a> () const</li>
+<li class=fn>reference <a href="#back"><b>back</b></a> ()</li>
+<li class=fn>const_reference <a href="#back-2"><b>back</b></a> () const</li>
+<li class=fn>void <a href="#push_back"><b>push_back</b></a> ( const&nbsp;T&nbsp;&amp;&nbsp;x )</li>
+<li class=fn>void <a href="#pop_back"><b>pop_back</b></a> ()</li>
+<li class=fn>iterator <a href="#insert"><b>insert</b></a> ( iterator&nbsp;pos, const&nbsp;T&nbsp;&amp;&nbsp;x )</li>
+<li class=fn>iterator <a href="#insert-2"><b>insert</b></a> ( iterator&nbsp;pos, size_type&nbsp;n, const&nbsp;T&nbsp;&amp;&nbsp;x )</li>
+<li class=fn>void <a href="#reserve"><b>reserve</b></a> ( size_type&nbsp;n )</li>
+<li class=fn>void <a href="#resize"><b>resize</b></a> ( size_type&nbsp;n, const&nbsp;T&nbsp;&amp;&nbsp;val = T ( ) )</li>
+<li class=fn>void <a href="#clear"><b>clear</b></a> ()</li>
+<li class=fn>iterator <a href="#erase"><b>erase</b></a> ( iterator&nbsp;pos )</li>
+<li class=fn>iterator <a href="#erase-2"><b>erase</b></a> ( iterator&nbsp;first, iterator&nbsp;last )</li>
+<li class=fn>bool <a href="#operator-eq-eq-2"><b>operator==</b></a> ( const&nbsp;QValueVector&lt;T&gt;&nbsp;&amp;&nbsp;x )</li>
+<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const&nbsp;QValueVector&lt;T&gt;&nbsp;&amp;&nbsp;x ) const</li>
+<li class=fn>typedef T&nbsp;<a href="#ValueType"><b>ValueType</b></a></li>
+<li class=fn>typedef ValueType&nbsp;*&nbsp;<a href="#Iterator"><b>Iterator</b></a></li>
+<li class=fn>typedef const&nbsp;ValueType&nbsp;*&nbsp;<a href="#ConstIterator"><b>ConstIterator</b></a></li>
+<li class=fn>size_type <a href="#count"><b>count</b></a> () const</li>
+<li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li>
+<li class=fn>reference <a href="#first"><b>first</b></a> ()</li>
+<li class=fn>const_reference <a href="#first-2"><b>first</b></a> () const</li>
+<li class=fn>reference <a href="#last"><b>last</b></a> ()</li>
+<li class=fn>const_reference <a href="#last-2"><b>last</b></a> () const</li>
+<li class=fn>void <a href="#append"><b>append</b></a> ( const&nbsp;T&nbsp;&amp;&nbsp;x )</li>
+</ul>
+<hr><a name="details"></a><h2>Detailed Description</h2>
+
+
+The QValueVector class is a value-based template class that provides a dynamic array.
+<p>
+
+
+
+
+<p> QValueVector is a Qt implementation of an STL-like vector
+container. It can be used in your application if the standard <tt>vector</tt> is not available for your target platforms. QValueVector is
+part of the <a href="qtl.html">Qt Template Library</a>.
+<p> QValueVector&lt;T&gt; defines a template instance to create a vector
+of values that all have the class T. QValueVector does not store
+pointers to the members of the vector; it holds a copy of every
+member. QValueVector is said to be value based; in contrast,
+<a href="qptrlist.html">QPtrList</a> and <a href="qdict.html">QDict</a> are pointer based.
+<p> QValueVector contains and manages a collection of objects of type
+T and provides random access iterators that allow the contained
+objects to be addressed. QValueVector owns the contained
+elements. For more relaxed ownership semantics, see <a href="qptrcollection.html">QPtrCollection</a>
+and friends, which are pointer-based containers.
+<p> QValueVector provides good performance if you append or remove
+elements from the end of the vector. If you insert or remove
+elements from anywhere but the end, performance is very bad. The
+reason for this is that elements must to be copied into new
+positions.
+<p> Some classes cannot be used within a QValueVector: for example,
+all classes derived from <a href="qobject.html">QObject</a> and thus all classes that
+implement widgets. Only values can be used in a QValueVector. To
+qualify as a value the class must provide:
+<ul>
+<li> a copy constructor;
+<li> an assignment operator;
+<li> a default constructor, i.e., a constructor that does not take any arguments.
+</ul>
+<p> Note that C++ defaults to field-by-field assignment operators and
+copy constructors if no explicit version is supplied. In many
+cases this is sufficient.
+<p> QValueVector uses an STL-like syntax to manipulate and address the
+objects it contains. See <a href="qtl.html">this document</a> for
+more information.
+<p> Example:
+<pre>
+ #include &lt;<a href="qvaluevector-h.html">qvaluevector.h</a>&gt;
+ #include &lt;<a href="qstring-h.html">qstring.h</a>&gt;
+ #include &lt;stdio.h&gt;
+
+ class Employee
+ {
+ public:
+ Employee(): s(0) {}
+ Employee( const <a href="qstring.html">QString</a>&amp; name, int salary )
+ : n( name ), s( salary )
+ { }
+
+ <a href="qstring.html">QString</a> name() const { return n; }
+ int salary() const { return s; }
+ void setSalary( int salary ) { s = salary; }
+ private:
+ <a href="qstring.html">QString</a> n;
+ int s;
+ };
+
+ int main()
+ {
+ typedef QValueVector&lt;Employee&gt; EmployeeVector;
+ EmployeeVector vec( 3 ); // vector of 3 Employees
+
+ vec[0] = Employee( "Bill", 50000 );
+ vec[1] = Employee( "Steve", 80000 );
+ vec[2] = Employee( "Ron", 60000 );
+
+ Employee joe( "Joe", 50000 );
+ vec.push_back( joe ); // vector expands to accommodate 4 Employees
+ joe.setSalary( 70000 );
+
+ EmployeeVector::<a href="#iterator">iterator</a> it;
+ for( it = vec.begin(); it != vec.end(); ++it )
+ printf( "%s earns %d\n", (*it).name().latin1(), (*it).salary() );
+
+ return 0;
+ }
+ </pre>
+
+<p> Program output:
+<pre>
+ Bill earns 50000
+ Steve earns 80000
+ Ron earns 60000
+ Joe earns 50000
+ </pre>
+
+<p> As you can see, the most recent change to Joe's salary did not
+affect the value in the vector because the vector created a copy
+of Joe's entry.
+<p> Many Qt functions return const value vectors; to iterate over
+these you should make a copy and iterate over the copy.
+<p> There are several ways to find items in the vector. The <a href="#begin">begin</a>()
+and <a href="#end">end</a>() functions return iterators to the beginning and end of
+the vector. The advantage of getting an iterator is that you can
+move forward or backward from this position by
+incrementing/decrementing the iterator. The iterator returned by
+end() points to the element which is one past the last element in
+the container. The past-the-end iterator is still associated with
+the vector it belongs to, however it is <em>not</em> dereferenceable;
+<a href="qsize.html#operator*-4">operator*</a>() will not return a well-defined value. If the vector is
+<a href="#empty">empty</a>(), the iterator returned by begin() will equal the iterator
+returned by end().
+<p> The fastest way to access an element of a vector is by using
+operator[]. This function provides random access and will return
+a reference to the element located at the specified index. Thus,
+you can access every element directly, in constant time, providing
+you know the location of the element. It is undefined to access
+an element that does not exist (your application will probably
+crash). For example:
+<p> <pre>
+ QValueVector&lt;int&gt; vec1; // an empty vector
+ vec1[10] = 4; // WARNING: undefined, probably a crash
+
+ QValueVector&lt;QString&gt; vec2(25); // initialize with 25 elements
+ vec2[10] = "Dave"; // OK
+ </pre>
+
+<p> Whenever inserting, removing or referencing elements in a vector,
+always make sure you are referring to valid positions. For
+example:
+<p> <pre>
+ void func( QValueVector&lt;int&gt;&amp; vec )
+ {
+ if ( vec.<a href="#size">size</a>() &gt; 10 ) {
+ vec[9] = 99; // OK
+ }
+ };
+ </pre>
+
+<p> The iterators provided by vector are random access iterators,
+therefore you can use them with many generic algorithms, for
+example, algorithms provided by the STL or the <a href="qtl.html">QTL</a>.
+<p> Another way to find an element in the vector is by using the
+std::find() or <a href="qtl.html#qFind">qFind()</a> algorithms.
+For example:
+<p> <pre>
+ QValueVector&lt;int&gt; vec;
+ ...
+ QValueVector&lt;int&gt;::<a href="#const_iterator">const_iterator</a> it = qFind( vec.<a href="#begin">begin</a>(), vec.<a href="#end">end</a>(), 3 );
+ if ( it != vector.end() )
+ // 'it' points to the found element
+ </pre>
+
+<p> It is safe to have multiple iterators on the vector at the same
+time. Since QValueVector manages memory dynamically, all iterators
+can become invalid if a memory reallocation occurs. For example,
+if some member of the vector is removed, iterators that point to
+the removed element and to all following elements become
+invalidated. Inserting into the middle of the vector will
+invalidate all iterators. For convenience, the function <a href="#back">back</a>()
+returns a reference to the last element in the vector, and <a href="#front">front</a>()
+returns a reference to the first element. If the vector is
+<a href="#empty">empty</a>(), both back() and front() have undefined behavior (your
+application will crash or do unpredictable things). Use back() and
+front() with caution, for example:
+<p> <pre>
+ QValueVector&lt;int&gt; vec( 3 );
+ vec.<a href="#push_back">push_back</a>( 1 );
+ vec.<a href="#push_back">push_back</a>( 2 );
+ vec.<a href="#push_back">push_back</a>( 3 );
+ ...
+ if ( !vec.<a href="#empty">empty</a>() ) {
+ // OK: modify the first element
+ int&amp; i = vec.<a href="#front">front</a>();
+ i = 18;
+ }
+ ...
+ QValueVector&lt;double&gt; dvec;
+ double d = dvec.<a href="#back">back</a>(); // undefined behavior
+ </pre>
+
+<p> Because QValueVector manages memory dynamically, it is recommended
+that you contruct a vector with an initial size. Inserting and
+removing elements happens fastest when:
+<ul>
+<li> Inserting or removing elements happens at the <a href="#end">end</a>() of the
+vector;
+<li> The vector does not need to allocate additional memory.
+</ul>
+<p> By creating a QValueVector with a sufficiently large initial size,
+there will be less memory allocations. Do not use an initial size
+that is too big, since it will still take time to construct all
+the empty entries, and the extra space will be wasted if it is
+never used.
+<p> Because QValueVector is value-based there is no need to be careful
+about deleting elements in the vector. The vector holds its own
+copies and will free them if the corresponding member or the
+vector itself is deleted. You can force the vector to free all of
+its items with <a href="#clear">clear</a>().
+<p> QValueVector is <a href="shclass.html#shared-implicitly">shared implicitly</a>, which means it can be copied in
+constant time. If multiple QValueVector instances share the same
+data and one needs to modify its contents, this modifying instance
+makes a copy and modifies its private copy; it thus does not
+affect the other instances. This is often called "copy on write".
+If a QValueVector is being used in a multi-threaded program, you
+must protect all access to the vector. See <a href="qmutex.html">QMutex</a>.
+<p> There are several ways to insert elements into the vector. The
+<a href="#push_back">push_back</a>() function insert elements into the end of the vector,
+and is usually fastest. The <a href="#insert">insert</a>() function can be used to add
+elements at specific positions within the vector.
+<p> Items can be also be removed from the vector in several ways.
+There are several variants of the <a href="#erase">erase</a>() function which removes a
+specific element, or range of elements, from the vector.
+<p> Vectors can be also sorted with various STL algorithms , or it can
+be sorted using the <a href="qtl.html">Qt Template Library</a>.
+For example with qHeapSort():
+<p> Example:
+<pre>
+ QValueVector&lt;int&gt; v( 4 );
+ v.<a href="#push_back">push_back</a>( 5 );
+ v.<a href="#push_back">push_back</a>( 8 );
+ v.<a href="#push_back">push_back</a>( 3 );
+ v.<a href="#push_back">push_back</a>( 4 );
+ qHeapSort( v );
+ </pre>
+
+<p> QValueVector stores its elements in contiguous memory. This means
+that you can use a QValueVector in any situation that requires an
+array.
+<p>See also <a href="qtl.html">Qt Template Library Classes</a>, <a href="shared.html">Implicitly and Explicitly Shared Classes</a>, and <a href="tools.html">Non-GUI Classes</a>.
+
+<hr><h2>Member Type Documentation</h2>
+<h3 class=fn><a name="ConstIterator"></a>QValueVector::ConstIterator</h3>
+The vector's const iterator type.
+<h3 class=fn><a name="Iterator"></a>QValueVector::Iterator</h3>
+The vector's iterator type.
+<h3 class=fn><a name="ValueType"></a>QValueVector::ValueType</h3>
+The type of the object stored in the vector.
+<h3 class=fn><a name="const_iterator"></a>QValueVector::const_iterator</h3>
+The vector's const iterator type.
+<h3 class=fn><a name="const_pointer"></a>QValueVector::const_pointer</h3>
+The const pointer to T type.
+<h3 class=fn><a name="const_reference"></a>QValueVector::const_reference</h3>
+The const reference to T type.
+<h3 class=fn><a name="difference_type"></a>QValueVector::difference_type</h3>
+A signed integral type used to represent the distance between two iterators.
+<h3 class=fn><a name="iterator"></a>QValueVector::iterator</h3>
+The vector's iterator type.
+<h3 class=fn><a name="pointer"></a>QValueVector::pointer</h3>
+The pointer to T type.
+<h3 class=fn><a name="reference"></a>QValueVector::reference</h3>
+The reference to T type.
+<h3 class=fn><a name="size_type"></a>QValueVector::size_type</h3>
+An unsigned integral type, used to represent various sizes.
+<h3 class=fn><a name="value_type"></a>QValueVector::value_type</h3>
+The type of the object stored in the vector.
+<hr><h2>Member Function Documentation</h2>
+<h3 class=fn><a name="QValueVector"></a>QValueVector::QValueVector ()
+</h3>
+
+<p> Constructs an empty vector without any elements. To create a
+vector which reserves an initial amount of space for elements, use
+<tt>QValueVector(size_type n)</tt>.
+
+<h3 class=fn><a name="QValueVector-2"></a>QValueVector::QValueVector ( const&nbsp;<a href="qvaluevector.html">QValueVector</a>&lt;T&gt;&nbsp;&amp;&nbsp;v )
+</h3>
+
+<p> Constructs a copy of <em>v</em>.
+<p> This operation costs O(1) time because QValueVector is <a href="shclass.html#implicitly-shared">implicitly shared</a>.
+<p> The first modification to the vector does takes O(n) time, because
+the elements must be copied.
+
+<h3 class=fn><a name="QValueVector-3"></a>QValueVector::QValueVector ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;n, const&nbsp;T&nbsp;&amp;&nbsp;val = T ( ) )
+</h3>
+
+<p> Constructs a vector with an initial size of <em>n</em> elements. Each
+element is initialized with the value of <em>val</em>.
+
+<h3 class=fn><a name="QValueVector-4"></a>QValueVector::QValueVector ( std::vector&lt;T&gt;&nbsp;&amp;&nbsp;v )
+</h3>
+
+<p> Constructs a copy of <em>v</em>.
+
+<h3 class=fn><a name="QValueVector-5"></a>QValueVector::QValueVector ( const&nbsp;std::vector&lt;T&gt;&nbsp;&amp;&nbsp;v )
+</h3>
+
+<p> This operation costs O(n) time because <em>v</em> is copied.
+
+<h3 class=fn><a name="~QValueVector"></a>QValueVector::~QValueVector ()
+</h3>
+
+<p> Destroys the vector, destroying all elements and freeing the
+allocated memory. References to the values in the vector and all
+iterators of this vector become invalidated. Note that it is
+impossible for an iterator to check whether or not it is valid:
+QValueVector is tuned for performance, not for error checking.
+
+<h3 class=fn>void <a name="append"></a>QValueVector::append ( const&nbsp;T&nbsp;&amp;&nbsp;x )
+</h3>
+
+<p> Appends a copy of <em>x</em> to the end of the vector.
+<p> <p>See also <a href="#push_back">push_back</a>() and <a href="#insert">insert</a>().
+
+<h3 class=fn><a href="qvaluevector.html#reference">reference</a> <a name="at"></a>QValueVector::at ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;i, bool&nbsp;*&nbsp;ok = 0 )
+</h3>
+
+<p> Returns a reference to the element with index <em>i</em>. If <em>ok</em> is
+non-null, and the index <em>i</em> is out of range, *<em>ok</em> is set to
+FALSE and the returned reference is undefined. If the index <em>i</em>
+is within the range of the vector, and <em>ok</em> is non-null, *<em>ok</em>
+is set to TRUE and the returned reference is well defined.
+
+<h3 class=fn><a href="qvaluevector.html#const_reference">const_reference</a> <a name="at-2"></a>QValueVector::at ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;i, bool&nbsp;*&nbsp;ok = 0 ) const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a const reference to the element with index <em>i</em>. If <em>ok</em>
+is non-null, and the index <em>i</em> is out of range, *<em>ok</em> is set to
+FALSE and the returned reference is undefined. If the index <em>i</em>
+is within the range of the vector, and <em>ok</em> is non-null, *<em>ok</em>
+is set to TRUE and the returned reference is well defined.
+
+<h3 class=fn><a href="qvaluevector.html#reference">reference</a> <a name="back"></a>QValueVector::back ()
+</h3>
+
+<p> Returns a reference to the last element in the vector. If there is
+no last element, this function has undefined behavior.
+<p> <p>See also <a href="#empty">empty</a>() and <a href="#front">front</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_reference">const_reference</a> <a name="back-2"></a>QValueVector::back () const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a const reference to the last element in the vector. If
+there is no last element, this function has undefined behavior.
+<p> <p>See also <a href="#empty">empty</a>() and <a href="#front">front</a>().
+
+<h3 class=fn><a href="qvaluevector.html#iterator">iterator</a> <a name="begin"></a>QValueVector::begin ()
+</h3>
+
+<p> Returns an iterator pointing to the beginning of the vector. If
+the vector is <a href="#empty">empty</a>(), the returned iterator will equal <a href="#end">end</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_iterator">const_iterator</a> <a name="begin-2"></a>QValueVector::begin () const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a const iterator pointing to the beginning of the vector.
+If the vector is <a href="#empty">empty</a>(), the returned iterator will equal <a href="#end">end</a>().
+
+<h3 class=fn><a href="qvaluevector.html#size_type">size_type</a> <a name="capacity"></a>QValueVector::capacity () const
+</h3>
+
+<p> Returns the maximum number of elements that can be stored in the
+vector without forcing memory reallocation. If memory reallocation
+takes place, some or all iterators may become invalidated.
+
+<h3 class=fn>void <a name="clear"></a>QValueVector::clear ()
+</h3>
+
+<p> Removes all the elements from the vector.
+
+<h3 class=fn><a href="qvaluevector.html#const_iterator">const_iterator</a> <a name="constBegin"></a>QValueVector::constBegin () const
+</h3>
+
+<p> Returns a const iterator pointing to the beginning of the vector.
+If the vector is <a href="#empty">empty</a>(), the returned iterator will equal <a href="#end">end</a>().
+<p> <p>See also <a href="#constEnd">constEnd</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_iterator">const_iterator</a> <a name="constEnd"></a>QValueVector::constEnd () const
+</h3>
+
+<p> Returns a const iterator pointing behind the last element of the
+vector.
+<p> <p>See also <a href="#constBegin">constBegin</a>().
+
+<h3 class=fn><a href="qvaluevector.html#size_type">size_type</a> <a name="count"></a>QValueVector::count () const
+</h3>
+
+<p> Returns the number of items in the vector.
+<p> <p>See also <a href="#isEmpty">isEmpty</a>().
+
+<h3 class=fn>bool <a name="empty"></a>QValueVector::empty () const
+</h3>
+
+<p> Returns TRUE if the vector is empty; otherwise returns FALSE.
+Equivalent to <a href="#size">size</a>()==0, only faster.
+<p> This function is provided for STL compatibility. It is equivalent
+to <a href="#isEmpty">isEmpty</a>().
+<p> <p>See also <a href="#size">size</a>().
+
+<h3 class=fn><a href="qvaluevector.html#iterator">iterator</a> <a name="end"></a>QValueVector::end ()
+</h3>
+
+<p> Returns an iterator pointing behind the last element of the
+vector.
+
+<h3 class=fn><a href="qvaluevector.html#const_iterator">const_iterator</a> <a name="end-2"></a>QValueVector::end () const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a const iterator pointing behind the last element of the
+vector.
+
+<h3 class=fn><a href="qvaluevector.html#iterator">iterator</a> <a name="erase"></a>QValueVector::erase ( <a href="qvaluevector.html#iterator">iterator</a>&nbsp;pos )
+</h3>
+
+<p> Removes the element at position <em>pos</em> and returns the position of
+the next element.
+
+<h3 class=fn><a href="qvaluevector.html#iterator">iterator</a> <a name="erase-2"></a>QValueVector::erase ( <a href="qvaluevector.html#iterator">iterator</a>&nbsp;first, <a href="qvaluevector.html#iterator">iterator</a>&nbsp;last )
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Removes all elements from <em>first</em> up to but not including <em>last</em>
+and returns the position of the next element.
+
+<h3 class=fn><a href="qvaluevector.html#reference">reference</a> <a name="first"></a>QValueVector::first ()
+</h3>
+
+<p> Returns a reference to the first item in the vector. If there is
+no first item, this function has undefined behavior.
+<p> <p>See also <a href="#empty">empty</a>() and <a href="#last">last</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_reference">const_reference</a> <a name="first-2"></a>QValueVector::first () const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p>
+<h3 class=fn><a href="qvaluevector.html#reference">reference</a> <a name="front"></a>QValueVector::front ()
+</h3>
+
+<p> Returns a reference to the first element in the vector. If there
+is no first element, this function has undefined behavior.
+<p> <p>See also <a href="#empty">empty</a>() and <a href="#back">back</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_reference">const_reference</a> <a name="front-2"></a>QValueVector::front () const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a const reference to the first element in the vector. If
+there is no first element, this function has undefined behavior.
+<p> <p>See also <a href="#empty">empty</a>() and <a href="#back">back</a>().
+
+<h3 class=fn><a href="qvaluevector.html#iterator">iterator</a> <a name="insert"></a>QValueVector::insert ( <a href="qvaluevector.html#iterator">iterator</a>&nbsp;pos, const&nbsp;T&nbsp;&amp;&nbsp;x )
+</h3>
+
+<p> Inserts a copy of <em>x</em> at the position immediately before <em>pos</em>.
+<p> <p>See also <a href="#push_back">push_back</a>().
+
+<h3 class=fn><a href="qvaluevector.html#iterator">iterator</a> <a name="insert-2"></a>QValueVector::insert ( <a href="qvaluevector.html#iterator">iterator</a>&nbsp;pos, <a href="qvaluevector.html#size_type">size_type</a>&nbsp;n, const&nbsp;T&nbsp;&amp;&nbsp;x )
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Inserts <em>n</em> copies of <em>x</em> immediately before position x.
+<p> <p>See also <a href="#push_back">push_back</a>().
+
+<h3 class=fn>bool <a name="isEmpty"></a>QValueVector::isEmpty () const
+</h3>
+
+<p> Returns TRUE if the vector is empty; returns FALSE otherwise.
+<p> <p>See also <a href="#count">count</a>().
+
+<h3 class=fn><a href="qvaluevector.html#reference">reference</a> <a name="last"></a>QValueVector::last ()
+</h3>
+
+<p> Returns a reference to the last item in the vector. If there is no
+last item, this function has undefined behavior.
+<p> <p>See also <a href="#empty">empty</a>() and <a href="#first">first</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_reference">const_reference</a> <a name="last-2"></a>QValueVector::last () const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p>
+<h3 class=fn><a href="qvaluevector.html">QValueVector</a>&lt;T&gt;&nbsp;&amp; <a name="operator-eq"></a>QValueVector::operator= ( const&nbsp;<a href="qvaluevector.html">QValueVector</a>&lt;T&gt;&nbsp;&amp;&nbsp;v )
+</h3>
+
+<p> Assigns <em>v</em> to this vector and returns a reference to this vector.
+<p> All iterators of the current vector become invalidated by this
+operation. The cost of such an assignment is O(1) since
+QValueVector is <a href="shclass.html#implicitly-shared">implicitly shared</a>.
+
+<h3 class=fn><a href="qvaluevector.html">QValueVector</a>&lt;T&gt;&nbsp;&amp; <a name="operator-eq-2"></a>QValueVector::operator= ( const&nbsp;std::vector&lt;T&gt;&nbsp;&amp;&nbsp;v )
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Assigns <em>v</em> to this vector and returns a reference to this vector.
+<p> All iterators of the current vector become invalidated by this
+operation. The cost of this assignment is O(n) since <em>v</em> is
+copied.
+
+<h3 class=fn>bool <a name="operator-eq-eq"></a>QValueVector::operator== ( const&nbsp;<a href="qvaluevector.html">QValueVector</a>&lt;T&gt;&nbsp;&amp;&nbsp;x ) const
+</h3>
+
+<p> Returns TRUE if each element in this vector equals each
+corresponding element in <em>x</em>; otherwise returns FALSE.
+
+<h3 class=fn>bool <a name="operator-eq-eq-2"></a>QValueVector::operator== ( const&nbsp;<a href="qvaluevector.html">QValueVector</a>&lt;T&gt;&nbsp;&amp;&nbsp;x )
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns TRUE if each element in this vector equals each
+corresponding element in <em>x</em>; otherwise returns FALSE.
+
+<h3 class=fn><a href="qvaluevector.html#reference">reference</a> <a name="operator[]"></a>QValueVector::operator[] ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;i )
+</h3>
+
+<p> Returns a reference to the element at index <em>i</em>. If <em>i</em> is out
+of range, this function has undefined behavior.
+<p> <p>See also <a href="#at">at</a>().
+
+<h3 class=fn><a href="qvaluevector.html#const_reference">const_reference</a> <a name="operator[]-2"></a>QValueVector::operator[] ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;i ) const
+</h3>
+
+<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a const reference to the element at index <em>i</em>. If <em>i</em> is
+out of range, this function has undefined behavior.
+<p> <p>See also <a href="#at">at</a>().
+
+<h3 class=fn>void <a name="pop_back"></a>QValueVector::pop_back ()
+</h3>
+
+<p> Removes the last item from the vector.
+<p> This function is provided for STL compatibility.
+
+<h3 class=fn>void <a name="push_back"></a>QValueVector::push_back ( const&nbsp;T&nbsp;&amp;&nbsp;x )
+</h3>
+
+<p> Appends a copy of <em>x</em> to the end of the vector. This is the
+fastest way to add new elements.
+<p> This function is provided for STL compatibility. It is equivalent
+to <a href="#append">append</a>().
+<p> <p>See also <a href="#insert">insert</a>().
+
+<h3 class=fn>void <a name="reserve"></a>QValueVector::reserve ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;n )
+</h3>
+
+<p> Increases the vector's capacity. If <em>n</em> is less than or equal to
+<a href="#capacity">capacity</a>(), nothing happens. Otherwise, additional memory is
+allocated so that capacity() will be increased to a value greater
+than or equal to <em>n</em>. All iterators will then become invalidated.
+Note that the vector's <a href="#size">size</a>() and the values of existing elements
+remain unchanged.
+
+<h3 class=fn>void <a name="resize"></a>QValueVector::resize ( <a href="qvaluevector.html#size_type">size_type</a>&nbsp;n, const&nbsp;T&nbsp;&amp;&nbsp;val = T ( ) )
+</h3>
+
+<p> Changes the size of the vector to <em>n</em>. If <em>n</em> is greater than
+the current <a href="#size">size</a>(), elements are added to the end and initialized
+with the value of <em>val</em>. If <em>n</em> is less than size(), elements
+are removed from the end. If <em>n</em> is equal to size() nothing
+happens.
+
+<h3 class=fn><a href="qvaluevector.html#size_type">size_type</a> <a name="size"></a>QValueVector::size () const
+</h3>
+
+<p> Returns the number of elements in the vector.
+<p> This function is provided for STL compatibility. It is equivalent
+to <a href="#count">count</a>().
+<p> <p>See also <a href="#empty">empty</a>().
+
+<!-- eof -->
+<hr><p>
+This file is part of the <a href="index.html">Qt toolkit</a>.
+Copyright &copy; 1995-2007
+<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>Qt 3.3.8</div>
+</table></div></address></body>
+</html>