From: dblack@...
Date: 2007-08-16T07:41:03+09:00
Subject: Re: newby: class getter proper use help

Hi --

On Thu, 16 Aug 2007, weathercoach@gmail.com wrote:

>   Hello.
>  I'm an aspiring ruby hobbyist.   I've finally got my head around
> some basic class usage and use of setter/getter methods.   However
> I've recently bumped into the threshold of my understanding.  My query
> here relates to trying to further my understanding of classes and
> class methods.
>
>   In the following example.  Defining the instance variable "@link"
> does
> not require anything beyond associating it with the nlink value from
> the File.stat.
>
> class FileStats
>  def initialize(f)
>    @@s = File.stat(f)
>    @link = @@s.nlink
>  end
>
>  attr_accessor :link
> end
>
> f = FileStats.new("/etc/services")
> puts f.link
>
>  In this example the infomation I want cannot be simply retreived
> from a subset of the File.stat so I create a method called "user".
> This method provides the warning "warning: method redefined;
> discarding old user" during execution because I already defined the
> "user" method with my attr_accesor line.   So I think my questions
> are.
>
>  1.   Am I over thinking this and I should just remove the "user"
> method
>  from attr_accessor?
>  2.   Should I include my "user" method within the "initialize"
> method?

You can do:

   attr_writer :user

and that leaves you to write the reader method yourself.


David

-- 
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