Overriding == Operator is not working and exits program

Question

I am trying to override the == operation as shown here. I created == as so:

class Point
  def ==(g)
    p'Never reaches here'
    if @x==g.grid
      true
    else
      false
    end
  end
end

I am calling the method as so:

def home? (gridPoint,point)
  if point==gridPoint
    do something
  end

When I run an application, "Never reaches here" is never printed, and the application skips the rest of the code and exits.

If I print gridPoint and Point right before the ==, I can see they are both points. Why does the program seem to have never entered the == method?

I tried point.==(gridPoint). This does not work either, and also defies the purpose of trying to clean the code.

Can anyone help me?

Answer 1

I think I have some suggestions why your exact code doesn't work

1. Class names should always be constants. This means you must capitalize the first letter!
2. You need to declare your == method as a class method not an instance method.
3. Along with #2 you need to call it using the class name not from the objects instance

class Point

      attr_accessor :x

      def initialize(string)
        @x == string
      end

       def self.== (g)
          p'Never reaches here'
          @x==(g) ? true : false
       end

      def home? (gridpoint, point)
        Point == (gridpoint)
      end
    end

    n = Point.new("Schylar")
    puts n.home?("Schylar","Schylar")