From: Rolando Abarca <funkaster@...>
Date: 2007-11-03T02:31:54+09:00
Subject: Re: Help invoking a method of a class

On Nov 2, 2007, at 2:07 PM, Victor Reyes wrote:

> I started playing with classes and to that effect, I put this simple
> do-nothing class just to make sure I can invoke a method within a  
> class.
>
> class Test
>   def mag(size)
>         maxLoop = size * size
>     r1 = Array.new(size) {1}
>     p r1
>   end # End method mag
> end # End class
>
> mag.Test 9
>
>
> I am getting this error:
>
> C:\$user\ruby\Programs\DejaVou>ruby Test.rb
> Test.rb:9: undefined local variable or method `mag' for main:Object
> (NameError)
>
> Any ideas anyone?

first, you're defining a instance method
second, the convention to call a method in ruby is: receiver.method,  
so in this case, you should call the method like this:

Test.mag 9

although, this won't work either, because the method mag is an  
instance method, so you should first create an instance, with 'new':

Test.new.mag 9

Anyway, at this point, I would suggest you to read something in  
Object Oriented Programming... I think a lot of good pointers have  
been suggested here in the list before, so make sure you check the  
archives.

> I am sure it is something trivial, but, trivial or not I can't get it.
>
> Thank you
>
> Victor

regards,
-- 
Rolando Abarca
Phone: +56-9 97851962