From: Keith Salisbury <keithsalisbury@...>
Date: 2009-04-23T23:01:01+09:00
Subject: Re: Class variable confusion

Or more simply, i would like this to update the variable @greeting, when 
i call Keith.learn_french:

module Keith
  def self.greeting
    @greeting ||= "hello"
  end
  def self.greeting=(value)
    puts "updating knowledge"
    @greeting = value
  end
  def self.speak
    puts greeting
  end
  def self.learn_french
    learn_language(greeting, "bonjour")
  end
  def self.learn_language(prop, value)
    prop = value
  end
end

Keith.speak
Keith.learn_french
Keith.speak

But the only way i can get it to work is using this:

module Keith
  def self.greeting
    @greeting ||= "hello"
  end
  def self.greeting=(value)
    puts "updating knowledge"
    @greeting = value
  end
  def self.speak
    puts greeting
  end
  def self.learn_french
    self.greeting = learn_language(greeting, "bonjour")
  end
  def self.learn_language(prop, value)
    prop = value
  end
end

Keith.speak
Keith.learn_french
Keith.speak


Which is basically the same as:

module Keith
  def self.greeting
    @greeting ||= "hello"
  end
  def self.greeting=(value)
    puts "updating knowledge"
    @greeting = value
  end
  def self.speak
    puts greeting
  end
  def self.learn_french
    self.greeting = "bonjour"
  end
end

Keith.speak
Keith.learn_french
Keith.speak


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