Question

What is the difference between these two cases. Firstly, if I open the connection and pass it into my method as a parameter, compared to opening the connection directly in the method?

cnn.open()
func(cnn,param1,param2);

vs

func(cnn, param1,param2)
{
  cnn.open();
  //open connection here
}

Answer 1

There’s no difference from the code you’ve posted other than in one case, your calling function needs to take care of opening/closing the connection, in the other, you’d expect the function to do it.