Hi boys & girls ---
Another design abstract problem. Let us say that we have a class called Airplane that's parent class is Vehicle. All Vehicles derived classes Move. How they move is quite different: Airplanes fly, Cars drive, and Rowboats are rowed. Which of the four approaches are taken:
1) The Vehicle superclass has Fly,Drive,and Row methods. The implementation of these methods is at either superclass or class level.
2) The Vehicle supports a Move method. The subclass defines Move as appropriate and returns a value indicating it flew,drove, or was rowed.
3) The subclasses have Fly, Drive, and Row methods as apppropriate; no Move or move specific methods are defined in the Vehicle superclass.
4) We have *no* Vehicle superclass and each subclass of Airplane, Rowboat, and Car is it's own superclass.
I currently strive for option 2 and used to use 4. Comments?
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John Koziol, ex-MVP, ex-MS, ex-FoxTeam. Just call me "X"
"When the going gets weird, the weird turn pro" - Hunter Thompson (Gonzo) RIP 2/19/05