Methods and properties in scheme - is object oriented programming possible in scheme?
- by incrediman
I will use a simple example to illustrate my question. In Java, C, or any other OOP language, I could create a pie class in a way similar to this:
class Apple{
public String flavor;
public int pieces;
private int tastiness;
public goodness(){
return tastiness*pieces;
}
}
What's the best way to do that with Scheme? I suppose I could do with something like this:
(define make-pie
(lambda (flavor pieces tastiness)
(list flavor pieces tastiness)))
(define pie-goodness
(lambda (pie)
(* (list-ref pie 1) (list-ref pie 2))))
(pie-goodness (make-pie 'cherry 2 5))
;output: 10
...where cherry is the flavor, 2 is the pieces, and 5 is the tastiness. However then there's no type-safety or visibility, and everything's just shoved in an unlabeled list. How can I improve that?
Sidenote: The make-pie procedure expects 3 arguments. If I want to make some of them optional (like I'd be able to in curly-brace languages like Java or C), is it good practice to just take the arguments in as a list (that is treat the arguments as a list - not require one argument which is a list) and deal with them that way?
