From: Torsten Mangner <ruby@...>
Date: 2008-07-04T15:00:27+09:00
Subject: Re: Basic ruby Question

Raveendran Jazzez wrote:

> But it was working in this way.
> 
> class Universe
>  def self.private_method
>     p "=========Hello world======="
>   end
> end
> u=Universe.new
> u.private_method
> 
> # => private.rb:7: undefined method `private_method' for 
> #<Universe:0x2b66aa0> (NoMethodError)

Your second example, does not work either. You tried to call a 
class-method on an object.

I don't know how useful a private class-method could be. it doesn't make 
to much sense for me.

i'm pretty sure, all you want is a simple instance-method: leave out the 
"self." at the methods declaration:

private
  def private_method
    p "something"
  end

> what is the Difference betweeen these two types?
> 
> u=Universe.new
> u.private_method     &&     Universe.private_method

for the difference between instance and class-methods use google on 
there terms. the first explanation i found, should be sufficient: 
http://www.juixe.com/techknow/index.php/2007/01/22/ruby-class-tutorial/
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