Difference between revisions of "QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator"

From Qt Wiki
Jump to: navigation, search
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 <QtConcurrentMap><br />#include <QVector>
+
<code>
 +
#include <QtConcurrentMap>
 +
#include <QVector>
  
 
#include <boost/bind.hpp>
 
#include <boost/bind.hpp>
Line 9: Line 11:
 
class Object{};
 
class Object{};
  
class MyClass<br />{<br />public:<br /> float operator()(const Object&amp;amp; object) { return 1.0f;}<br /> typedef float result_type;<br />};
+
class MyClass
 +
{
 +
public:
 +
float operator()(const Object&amp;amp; object) { return 1.0f;}
 +
typedef float result_type;
 +
};
  
int main()<br />{<br /> QVector&amp;amp;lt;Object&amp;amp;gt; v;<br /> Object a;<br /> v.push_back(a);
+
int main()
 +
{
 +
QVector&amp;amp;lt;Object&amp;amp;gt; v;
 +
Object a;
 +
v.push_back(a);
  
 
MyClass myClass;
 
MyClass myClass;
Line 17: Line 28:
 
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), myClass);
 
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), myClass);
  
std::cout << result[0] << std::endl;<br /> return 0;<br />}
+
std::cout << result[0] << std::endl;
 +
return 0;
 +
}

Revision as of 11:32, 25 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

  1. include <QtConcurrentMap>
  2. 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;

}