How do you make all attributes public in ruby class -

i have class 20+ attributes, want each of them publicly readable or if not public.

i cannot seem find data relevant this. can me here please?

i want make of them public without having type 20+ attributes attr_reader.

you can using method_missing. method_missing called whenever tries call method class doesn't know how respond to.

class foo    def initialize     @a = 1     @b = 2     @c = 3   end    def respond_to_missing?(name)     super || has_attribute?(name)   end    def method_missing(name, *args)     if has_attribute?(name)       instance_variable_get("@#{name}")     else          super     end   end    private    def has_attribute?(name)     instance_variable_defined?("@#{name}")   end  end 

here's looks when use it

foo = foo.new p foo.a    # => 1 p foo.b    # => 2 p foo.c    # => 3 p foo.d    # => method_missing error 

note: ruby earlier 1.9.2: override respond_to? instead of respond_to_missing?