So I've used plenty of STL functions which takes functors as parameters. For calculating set differences, for sorting vectors, etc. I'm in a situation where I'd like to write such a function ...

Is it poor programming practice to pass parameters as objects? Are you making code more maintainable? Or just covering up poorly defined methods?

Passing Iterator objects as function parameters can also be faster than passing in a cloned List object, because the copies to be contained in the Iterator need not be created unless the receiving ...