From: "(r.*n){2}" <perl2ruby@...>
Date: 2010-09-28T12:00:09+09:00
Subject: Re: Operator Overload

On Sep 27, 9:49 pm, Trevor Hinesley <trevor.hines...@gmail.com> wrote:
> Hey guys,
>
> I'm slowly getting the hang of Ruby, I'm a Java guy by trade. I really
> like Ruby and am picking up on it pretty quickly, but for some reason my
> overload of the "+" operator is not working. Here is the code:
>
> class Overloading
> def -(a)
>   return -a
> end
> b = 2-4
> puts "#{b}"
> end
>
> Basically, I'm trying to turn the minus operator into a plus operator
> for a project to show how operator overloading in Ruby works, but this
> isn't working from some reason, and I'm not sure why.
>
> Help?
>
> Thanks,
>
> Trevor
> --
> Posted viahttp://www.ruby-forum.com/.

I think you have just defined the class called Overloading and have
not instantiated it. Did you intend to do this?
class Overloading
def -(a)
  return -a
end
b = 2-4
puts "#{b}"
end

x = Overloading.new
puts "#{x.-(5)}"
puts "#{x - 5}"   # same as x.-(5) above

Output:
-2  # this comes from the puts that is part of class definition
-5
-5