Question

i’m so new to Ruby

we can say that attr_accessor :bark

is sugar coating for

 def bark
    @bark
  end

  def bark=(val)
    @bark = val
  end

What would be the same when given multiple parameters
is it?

attr_accessor *args
    args.each { |attr|
     def attr
            @attr
          end

          def attr=(val)
            @attr= val
          end
    }

and if so how can i use the same with initialization of all given params also

and in class_eval(Meta OOP) with dynamic attr+random_str?

Answer 1

The stuff

attr_accessor *args
  args.each { |attr|
   def attr
     @attr
   end

   def attr=(val)
     @attr= val
   end
 }

won’t work. It would create a method “attr” which returns the value of the instance variable “@attr”. I think that’s not what you want to do, right? You should do

args.each do |arg|
  self.define_singleton_method arg do self.instance_variable_get arg end
end

for the getter and almost the same stuff for the setter.
I don’t know what you mean with

and if so how can i use the same with initialization of all given params also
and in class_eval(Meta OOP) with dynamic attr+random_str?

regards