From: Kedar Mhaswade <kedar.mhaswade@...>
Date: 2011-01-07T04:41:49+09:00
Subject: Re: Class Initialization?

Andrew Wagner wrote in post #972567:
> On Wed, Jan 5, 2011 at 12:18 PM, Kedar Mhaswade
> <kedar.mhaswade@gmail.com>wrote:
>
>> available from the class, without having to create any instances of it.
>>
>> --
>> Posted via http://www.ruby-forum.com/.
>>
>>
> To answer this, grasshopper, I suggest you study this code, and figure
> out
> how it works. Hint: there are more than one @count variables.
>
> class Counter
>   @count = 0
>
>   class << self
>     attr_accessor :count
>   end
>
>   def initialize
>     self.class.count += 1
>     @count = self.class.count
>   end
>
>   def output
>     puts "I am counter object number #{@count} of #{self.class.count}"
>   end
> end
>
> x = Counter.new
> x.output # I am counter object number 1 of 1
>
> y = Counter.new
> x.output # I am counter object number 1 of 2
> y.output # I am counter object number 2 of 2

My n00b parser is stuck at class << self for I have to yet learn that 
construct, I guess.

But I will spend more time understanding this example. My first attempt 
tells me that there are two types of variables (one: class, other 
instance) and both are named count.

I am still influenced by the "initially straightforward" example given 
in the Pickaxe book that counts the number of Song objects created thus 
far (i.e. incrementing @@count by 1 in the initialize method).

Thank you.

-- 
Posted via http://www.ruby-forum.com/.