From: Akbar Pasha <akbarpasha@...>
Date: 2006-05-04T22:49:13+09:00
Subject: A question about attr_reader

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Hi All,

I am just going through the pickacxe book and have a question about
attr_reader. Here is the sample class.

class Song
    def initialize(name, artist, duration)
        @name =3D name
        @artist =3D artist
        @duration =3D duration
    end
end

It says I can do the following-

class Song
    def name
        @name
    end
    def artist
       @artist
   end
    def duration
        @duration
    end
end

OR

I can do the following-

class Song
    attr_reader :name, :artist, :duration
end

This is fine, but it says "The corresponding instance variables, @name,
@artist, and @duration, will be created automatically" (on Page 31) about
attr_reader. I kinda thought that those variables are already created when
"initialize" function is called. If I comment the initialize function and
run it - I get an error.

So what does the author mean by that?

Thanks in advance,

::akbar

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