Is it possible to compare private attributes in Ruby?

Question

I\'m thinking in:

class X
    def new()
        @a = 1
    end
    def m( other ) 
         @a == other.@a
    end
end

x = X.new()
y = X.new()
x.m( y ) 
         


        

Answer 1

If you don't use the instance_eval option (as @jleedev posted), and choose to use a getter method, you can still keep it protected

If you want a protected method in Ruby, just do the following to create a getter that can only be read from objects of the same class:

class X
    def new()
        @a = 1
    end
    def m( other ) 
        @a == other.a
    end

    protected
    def a 
      @a
    end
end

x = X.new()
y = X.new()
x.m( y ) # Returns true
x.a      # Throws error