From: "Földes László" <lists@...>
Date: 2012-04-11T04:53:49+09:00
Subject: Re: New to Ruby, tutorial gives wrong example.

Roger McDonald wrote in post #1055746:

>
> Just this required the same text 3 times, one to initialise, one to
> declare variables and one for attr_accessor
>

It might seem awkward, but Ruby is such a language where:
1. you cannot access an initiated class' variables by default (there is
a way, but that looks ugly).
2. (almost) everything is a method

These concludes that if you want to access the variables of a class, you
have to write methods for that. That's what 'attr_accessor' did, and it
did saved you a lot of typing :-)

As for the 'initialize', it is not necessary to initialize variables
during that phase, but then you would have to do that later, through the
methods that attr_accessor created.

class Rectangle
  attr_accessor :y, :x, :height, :width, :linecolor, :fillcolor,
:linewidth
end

rect = Rectangle.new()
rect.y, rect.x, rect.height, rect.width, rect.linecolor, rect.fillcolor,
rect.linewidth = 10, 20, 50, 60, "blue", "yellow", 12

(you can rewrite your initialize method with multiple assignment as
above, it will be more compact and readable)

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