> 3) If I have an empty init, e.g.,
>
> def init; super; self; end
>
> Can I always delete the empty init and get the same result through
> inheritance?
Yes, you can omit the #init declaration in this case, it works like a charm,
because every Obj-C object (and thus every MacRuby object) inherits from
NSObject, that has its own -init method.
What this means is if you don't define yours, calling -init on your object will
call NSObject's -init, just like in Obj-C :-)
class Hello
def world
puts "Hello world!"
end
end
Hello.alloc.init.world
> I don't think I've seen any examples using the initWith method. Is that
> method called after init?
Simply something of the like:
- (id)initWithDelegate:(id)someDelegate
{
[self setDelegate:someDelegate];
}
or
- (id)initWithColor:(MRColor)color andBorderSize:(int)borderSize
{
[self setCubeColor:color];
[self setBorderSize:borderSize];
}
Hope this helped :-)
--
Thibault Martin-Lagardette
On Sep 8, 2010, at 09:22, Matt Aimonetti wrote:
> 1) Does MacRuby distinguish between Objective C subclasses and other Ruby
> classes or are all classes treated the same?
> Not really but Cocoa classes expect to be returned self in the init process
> and the Cocoa convention is not to overwrite init but to create your own
> initializer using the initWith pattern. In Ruby, #initialize is often
> overwritten.
>
> 2) Can my inheritance path be arbitrarily long before I inherit from NSObject
> or an NS subclass?
> Yes, consider the following example:
>
> > class Foo; end; class Bar < Foo; end; class Baz < Bar; end; class Bob <
> > Baz; end
> => nil
> > Bob.ancestors
> => [Bob, Baz, Bar, Foo, NSObject, Kernel]
>
> 3) If I have an empty init, e.g., def init; super; self; end
> Can I always delete the empty init and get the same result through
> inheritance?
>
> I am not sure what you mean, sorry :(
>
> - Matt
>
>
> On Wed, Sep 8, 2010 at 8:50 AM, Robert Rice <[email protected]> wrote:
> Thanks Matt:
>
> Good tutorial on super. Maybe someone could add a keyword section to ruby-doc.
>
> This leads me to a couple more questions on super and MacRuby inheritance:
>
> 1) Does MacRuby distinguish between Objective C subclasses and other Ruby
> classes or are all classes treated the same?
>
> 2) Can my inheritance path be arbitrarily long before I inherit from NSObject
> or an NS subclass?
>
> 3) If I have an empty init, e.g.,
>
> def init; super; self; end
>
> Can I always delete the empty init and get the same result through
> inheritance?
>
> Bob Rice
>
>
> On Sep 7, 2010, at 4:13 PM, Matt Aimonetti wrote:
>
> > Satish has a good blog post on the matter:
> > http://rubylearning.com/satishtalim/ruby_overriding_methods.html
> >
> > You can certainly call super in your subclass before making any
> > modifications or calling super based on a condition.
> >
> > I hope it helps,
> >
> > - Matt
> >
> > Sent from my iPhone
> >
> > On Sep 7, 2010, at 12:53, Robert Rice <[email protected]> wrote:
> >
> >> Thanks Matt:
> >>
> >> I didn't see super in the ruby-doc.org/ruby-1.9/index.html unless super is
> >> short for superclass.
> >>
> >> Can I reach a superclass method without having the message go first to my
> >> subclass override of the method?
> >>
> >> Bob Rice
> >>
> >>
> >> On Sep 7, 2010, at 3:26 PM, Matt Aimonetti wrote:
> >>
> >>> No it's not unique to MacRuby (Ruby and Obj-C support that feature) and
> >>> yes you can pass other arguments :)
> >>>
> >>> - Matt
> >>>
> >>> Sent from my iPhone
> >>>
> >>> On Sep 7, 2010, at 12:16, Robert Rice <[email protected]> wrote:
> >>>
> >>>> Questions on the super method:
> >>>>
> >>>> Is the super method unique to MacRuby?
> >>>>
> >>>> super forwards the current message to the superclass with the same
> >>>> method name and arguments. Is there a way to send a message to the
> >>>> superclass method with different arguments either from within the
> >>>> subclass method of the same name or from outside the subclass method of
> >>>> the same name to bypass the subclass method?
> >>>>
> >>>> Thanks,
> >>>> Bob Rice
> >>>>
> >>>> _______________________________________________
> >>>> MacRuby-devel mailing list
> >>>> [email protected]
> >>>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> >>> _______________________________________________
> >>> MacRuby-devel mailing list
> >>> [email protected]
> >>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> >>>
> >>
> >> _______________________________________________
> >> MacRuby-devel mailing list
> >> [email protected]
> >> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> > _______________________________________________
> > MacRuby-devel mailing list
> > [email protected]
> > http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> >
>
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