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

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Demonstrates how to pass each object in the container to a member function of different class instance. You can alternatively do this using [http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind boost::bind] ''[developer.qt.nokia.com]''
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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
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<code><br />#include &lt;QtConcurrentMap&amp;gt;<br />#include &lt;QVector&amp;gt;
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#include &lt;boost/bind.hpp&amp;gt;
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#include &lt;iostream&amp;gt;
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class Object{};
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class MyClass<br />{<br />public:<br /> float operator()(const Object&amp;amp; object) { return 1.0f;}<br /> typedef float result_type;<br />};
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int main()<br />{<br /> QVector&amp;amp;lt;Object&amp;amp;gt; v;<br /> Object a;<br /> v.push_back(a);
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MyClass myClass;
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QVector&amp;lt;float&amp;gt; result = QtConcurrent::blockingMapped&amp;lt;QVector&amp;lt;float&amp;gt; &gt;(v.begin(), v.end(), myClass);
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std::cout &lt;&lt; result[0] &lt;&lt; std::endl;<br /> return 0;<br />}

Revision as of 11:14, 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&quot;:http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind


#include <QtConcurrentMap&gt;
#include <QVector&gt;

  1. include <boost/bind.hpp&gt;
  1. include <iostream&gt;

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

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