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

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{{Cleanup | reason=Auto-imported from ExpressionEngine.}}
[[Category:HowTo]]
 
This demonstrates how to pass each object in the container to a member function of different class instance using boost::bind. You can alternatively do this by overloading [[QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator | operator()]]
Demonstrates how to pass each object in the container to a member function of different class instance using boost::bind. You can alternatively do this by overloading "operator()":http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator


<code>
<code>
#include <QtConcurrentMap>
#include <QtConcurrentMap>
#include <QVector>
#include <QVector>
#include <boost/bind.hpp>
#include <boost/bind.hpp>
#include <iostream>
#include <iostream>


Line 16: Line 13:
{
{
public:
public:
  float Test(const Object&amp;amp; object) const { return 1.0f;} // Note, this function MUST be const!
  float Test(const Object& object) const { return 1.0f; } // Note, this function MUST be const!
};
};


int main()
int main()
{
{
  QVector&amp;amp;lt;Object&amp;amp;gt; v;
  QVector<Object> v;
  Object a;
  Object a;
  v.push_back(a);
  v.push_back(a);
 
MyClass myClass;
MyClass myClass;
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&MyClass::Test, &myClass, _1));
 
std::cout << result[0] << std::endl;
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&amp;MyClass::Test, &amp;myClass, _1));
 
std::cout << result[0] << std::endl;
  return 0;
  return 0;
}
}
</code>

Latest revision as of 02:14, 18 May 2017

This demonstrates how to pass each object in the container to a member function of different class instance using boost::bind. You can alternatively do this by overloading operator()

#include <QtConcurrentMap>
#include <QVector>
#include <boost/bind.hpp>
#include <iostream>

class Object{};

class MyClass
{
public:
 float Test(const Object& object) const { return 1.0f; } // Note, this function MUST be const!
};

int main()
{
 QVector<Object> v;
 Object a;
 v.push_back(a);
 MyClass myClass;
 QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&MyClass::Test, &myClass, _1));
 std::cout << result[0] << std::endl;
 return 0;
}