gabriele renzi
11/13/2004 1:59:00 PM
Mathias Weyel ha scritto:
> Hello!
>
> I am quite new to Ruby and come directly from the world of Java. While
> the lack of a static type system has proven to be somehow irritating to
> me, I have stepped over a rather small problem concerning overloading of
> methods and parameter names. In Java, this problem cannot occur due to
> the static type system.
notice that there are modules (such as the poorly named StrongTyping or
types.rb) that allow you to attach type information to methods, even
allowing overloading. Also there is a module from Florian Gross (IIRC,
ans sorry for not typing the 'b' :) that allows you to use real MMD.
<snip>
> class Whatever {
> List objects;
> public void remove(Object o) {...}
> public void remove(int i) {...}
> }
>
> The problem in converting this code to Ruby is that the remove method
> has no type and, because of this, cannot be overloaded this way. While
> having only one method and checking the type of the given argument
> manually seems somehow wrong to me, I wonder, how to call the parameter.
> The int parameter I would normally call "index" while the object
> parameter would correspond to the objects stored in the list. What name
> should the parameter get? I want to have a name that actually makes
> sense, but "objectOrIndex" seems stupid.
>
why do you feel the need to have a single method?
I mean, they're actually doing differen things, so why not:
class Foo
def remove_object(obj)..end
def remove_index(idx)..end
end
HTH