See, your case is exactly when I would expect to be quizzed for algorithmic complexity and the like. And I would most likely fail! I understand pass by referenc

See, your case is exactly when I would expect to be quizzed for algorithmic complexity and the like. And I would most likely fail! I understand pass by reference / pass by value but I would have to study hash tables (which I'm familiar with) and self balancing search trees (which I have heard of, but have not, to my knowledge, encountered).