From: 7stud -- <bbxx789_05ss@...>
Date: 2007-11-03T02:23:26+09:00
Subject: Re: Help invoking a method of a class

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

You need to create an object of the class, and then use the object to 
call the method:

class Test
  def mag(size)
    r1 = Array.new(size)
    p r1
  end
end

my_obj = Test.new()
my_obj.mag 10


Or, you can create a 'class method', which allows you to call the method 
with the class name:

class Dog
  def Dog.bark
    puts "Woof! woof!"
  end
end

Dog.bark

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