From: luke gruber <luke.gru@...>
Date: 2011-08-01T06:29:06+09:00
Subject: system stack error in ObjectSpace.each_object

Hey guys, I'm just starting to mess around with metaprogramming in Ruby,
so I was just having a bit of fun and trying to make a script that would
allow for creating a 'leader' object in a class, and then when that
object is sent a message, all other objects of some subordinate class
would respond to the same message.

So the script I wrote is here:
https://github.com/luke-gru/lemmings/blob/master/leader.rb

On line 52, I ran into this issue:

  def get_other_objects(subord_class)
    obj_ary = []
    ObjectSpace.each_object(subord_class) do |o|
      obj_ary.push(o) unless o.leader # here
    end
    obj_ary
  end

If I don't have the 'unless o.leader' expression modifier, it pushes
like a million of the 'leader' objects and raises a SystemStackError.

I have no idea why, and would really appreciate an answer.

Thanks,

-Luke

-- 
Posted via http://www.ruby-forum.com/.