From: David Masover <ninja@...>
Date: 2009-08-25T09:48:35+09:00
Subject: Re: Calling method from another class

On Monday 24 August 2009 05:12:44 pm Kostas Lps wrote:
> I want to make something like this:
> a = A.new
> a.printB

Use modules or inheritance.

> I this possible someway???

Not the way you've defined those classes. If B was either a superclass of A, or 
a module mixed into A, you could use unbound methods, but it's not, so you 
can't.

> I dont want to use modules.

Why not?

This is exactly why modules exist -- to solve exactly, precisely, the problem 
you've outlined.

Ask yourself this question: Do the methods you want out of B make any sense at 
all in A, or in any other class? If so, why not make it a module? If not, you 
may want to do some sort of delegation -- that is:

class A
  def initialize
    @b = B.new
  end
  def printB
    @b.printB
  end
end

Does that answer your question?