Meta programming Setters and Getters

meta_set_get.rb

class Object
  def self.my_attr_accessible( *names )
    names.each do |name|
      define_method( "#{name}=" ) do |value|
	instance_variable_set( "@#{name}", value )
      end
      define_method( name ) do
	instance_variable_get( "@#{name}" )
      end
    end
  end
end

class Developer
  my_attr_accessible :level, :name, :surname

  def initialize
    yield (self) if block_given?
  end
end

# Setters
superduperdev = Developer.new() do |d|
  d.level = "journeyman"
  d.name = "Edmore"
  d.surname = "Moyo"
end

# Getters
1.9.3p125 :031 > superduperdev.name
 => "Edmore" 
Edmore's IRB > superduperdev.surname
 => "Moyo" 
Edmore's IRB > superduperdev.level
 => "journeyman" 

Edmore's IRB > superduperdev.instance_variables
 => [:@level, :@name, :@surname]