Re: executing a for loop or once depending on a test

Hi,

I am trying to avoid redundancy in my code and would like to know if
there is an elegant solution for this.

Let's say I have 2 vectors (va and vb) that may contain Int and String
elements respectively, or be empty. I'd like to generate all
combinations of Int/String so I could use a nested loop :

for (vector<int>::iterator vai = va.begin(); vai != va.end(); ++vai)
  {
    for (vector<string>::iterator vbi = vb.begin(); vbi != vb.end(); ++vbi)
      {
        // create the object
        Object* oneobject = new Object();
        // store vai and vbi combination
        oneobject->addInt(*vai);
        oneobject->addString(*vbi);
        // store the object pointer somewhere;
        vector_objects.push_back(oneobject);
      }
  }

The problem here is that if one of my vectors is empty, no object at
all will be created.