QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator: Difference between revisions

From Qt Wiki
Jump to navigation Jump to search
No edit summary
No edit summary
Line 1: Line 1:
Demonstrates how to pass each object in the container to a member function of different class instance. You can alternatively do this using "boost::bind":http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind
Demonstrates how to pass each object in the container to a member function of different class instance. You can alternatively do this using "boost::bind":http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind


<code><br />#include &lt;QtConcurrentMap&amp;gt;<br />#include &lt;QVector&amp;gt;
<code><br />#include <QtConcurrentMap><br />#include <QVector>


#include &lt;boost/bind.hpp&amp;gt;
#include <boost/bind.hpp>


#include &lt;iostream&amp;gt;
#include <iostream>


class Object{};
class Object{};
Line 15: Line 15:
MyClass myClass;
MyClass myClass;


QVector&amp;lt;float&amp;gt; result = QtConcurrent::blockingMapped&amp;lt;QVector&amp;lt;float&amp;gt; &gt;(v.begin(), v.end(), myClass);
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), myClass);


std::cout &lt;&lt; result[0] &lt;&lt; std::endl;<br /> return 0;<br />}
std::cout << result[0] << std::endl;<br /> return 0;<br />}

Revision as of 14:27, 24 February 2015

Demonstrates how to pass each object in the container to a member function of different class instance. You can alternatively do this using "boost::bind":http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind


#include <QtConcurrentMap>
#include <QVector>

  1. include <boost/bind.hpp>
  1. include <iostream>

class Object{};

class MyClass
{
public:
float operator()(const Object&amp; object) { return 1.0f;}
typedef float result_type;
};

int main()
{
QVector&amp;lt;Object&amp;gt; v;
Object a;
v.push_back(a);

MyClass myClass;

QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), myClass);

std::cout << result[0] << std::endl;
return 0;
}

Retrieved from "https://wiki.qt.io/index.php?title=QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator&oldid=5879"