Michl's Seit'n … keine Ahnung, aber davon ganz viel!

C++: std::list find_if

#include <list>
#include <string>
#include <iostream>
#include <algorithm>

using namespace std;

class MyData
{
public:
  int m_value;
};

///////////////////////////////////////////////////////////////////////////////
// Struct: MyDataElemEqual
//              required for find_if on std::list of int
//
//
struct MyDataElemEqual : public std::binary_function< MyData*,int,bool >
{
  int m_value;

  // struct contructor
  MyDataElemEqual(int value)
    : m_value(value)
  {
  }

  // operator () for compare
  bool operator () (MyData* cmpValue) const
  {
    return ( cmpValue->m_value == m_value );
  }
};

int main()
{
  // Create list
  std::list<MyData*> mylist;

  MyData *elem = NULL;

  // Add data to the list
  elem = new MyData();
  elem->m_value = 3;
  mylist.push_back(elem);
  elem = new MyData();
  elem->m_value = 1;
  mylist.push_back(elem);
  elem = new MyData();
  elem->m_value = 8;
  mylist.push_back(elem);
  elem = new MyData();
  elem->m_value = 22;
  mylist.push_back(elem);

  // find a spezific element
  std::list<MyData*>::iterator it = mylist.begin();

  cout << "Search for value [1]" << endl;
  it = std::find_if (mylist.begin(), mylist.end(), MyDataElemEqual(1) );
  if (it != mylist.end())
  {
    cout << "Found: " << (*it)->m_value << endl;
  } else {
    cout << "Nothing found!" << endl;
  }

  return 1;
}