From: Daniel Choi <dhchoi@...>
Date: 2008-08-14T03:22:22+09:00
Subject: Re: How to do this?


> 2. How to achieve the '+' operation for symbols? For example symbol4 +
> somesymbol would join the geometry of the latter into the former. Or
> perhaps return a new symbol with combined geometry. How is that handled
> for adding number-objects?

This doesn't completely answer your question, but you can define a +
(value) method on any class. You can write any logic you want in it.

E.g.

class TestPlus
  def initialize(value=0)
    @value = value
  end

  def +(value)
    # replace this with any logic you want. +value+ can be any sort of
object, not just a number
    @value += value
    puts @value
  end
end

x = TestPlus.new(0)
x + 2
=> 2