From: Rich Kilmer <rich@...>
Date: 2002-01-01T11:11:13+09:00
Subject: [ruby-talk:29926] Re: Ruby/Python: Software Engineering



> -----Original Message-----
> From: Bjorn Pettersen [mailto:BPettersen@NAREX.com]
> Sent: Monday, December 31, 2001 6:09 PM
> To: ruby-talk ML
> Subject: [ruby-talk:29910] Re: Ruby/Python: Software Engineering
>
>
> > From: Kyle Cordes [mailto:kyle@kylecordes.com]
> >
> > "Mathieu Bouchard" <matju@sympatico.ca> wrote in message
> > news:Pine.LNX.4.21.0112311600250.3187-100000@bartok...
> >
> > > >     Enforced indention (you indent your own code I bet)
> >
> > > That's a nice feature to save writing "end" all the time. But not
> > having
> > > to write "self" all the time is much more important to me.
> >
> > That's always been a mystery to me... I enjoy Python's
> > terseness that comes from using indentation to describe
> > blocks, but it doesn't seem to reconcile with the (IMHO)
> > sillyness of writing self everywhere.
>
> You need some way of disambiguating nested classes (how does Ruby do
> this btw?):
>
>   class Outer:
>       def method1(self): pass
>       def method2(self):
>           class Inner:
>               def innerMeth1(this): pass
>               def innerMeth2(this):
>                   self.method1()
>                   this.innerMeth1()

In this example is class Inner defined in the method2 body?

In Ruby you can do this:

class Outer
  def method1
  end

  class Inner
    def innerMethod1
    end
  end
end

but the Inner class is NOT an inner class (a la Java) but a class defined in
the namespace Outer and referenced as:

in = Outer::Inner.new
in.innerMethod1

Now, that class does not have access to the methods on Outer (unless they
are class methods like:

class Outer
  def Outer.method1
  end
end

Then the innerMethod1 can execute the class method as:

class Inner
  def innerMethod1
    Outer.method1
  end
end

Or if Inner is a subclass of Outer you could do this:

class Outer
  def method1
  end

  class Inner < Outer
    def innerMethod1
      method1
    end
  end
end

>
> Etc.
>
> -- bjorn
>