Why is the property value of the object being returned, and not the object itself?

Question

ruby

Why is the property value of the object being returned, and not the object itself?

class Point
    attr_accessor :x, :y
    def initialize(x, y) 
        @x, @y = x, y
    end
    def add! ob
        @x += ob.x
        @y += ob.y
    end
    def add ob
        q = self.dup
        q.add! ob
        q                  #!!! Я же возвращаю сам объект а не его свойства
    end
end
po1 = Point.new(3,5)
po2 = Point.new(6,8)
p po1.add po2 # => 9, 13

Or so.

def add! ob
    @x += ob.x
    @y += ob.y
     self
end
def add ob
    q = self.dup
    q.add! ob
end

Answer 1

I didn't get any values.
Yes, and in the console there is little point in displaying objects using print, p, puts ... they are brought to the line by default

Answer 2

And I also
found the reason. I have a to_s method defined in Point without it, everything works fine. What is the reason for this behaviour?

def to_s
    "#@x, #@y"
end

it p xjust callsx.to_s

Answer 3

Because it
's really
puts foo.inspect