From: Matthew B Gardner <weather@...>
Date: 2007-08-18T15:34:40+09:00
Subject: Re: Problem with Array#delete

Sorry, I only meant the code I posted as an example of what is happening -- 
the actual code would be a little hard to gather and format, but I will do so 
if the following isn't enough information:

ruby -v #=> ruby 1.8.4 (2005-12-24) [i486-linux]

Ok, I threw this code in to gather some info, and following it is the 
printout:

p world.characters.class
p world.characters.size
world.characters.each do |ch|
	p ch.class
	p ch.object_id
end
world.characters.delete(self)
p world.characters

Array
2
Character
-607336504
Character
-607410834
[]

Do I need to format up the code, or is there something telling from the 
information here?

Thanks,
Matt

On Saturday 18 August 2007 02:17, Morton Goldberg wrote:
> On Aug 18, 2007, at 12:59 AM, Matthew B Gardner wrote:
> > Hello, I'm baffled by the following problem:
> >
> > I have an Account class and an external array that keeps them in a
> > list. I'm
> > trying to delete the account objects one at a time as needed, by:
> >
> > class Account
> > 	def quit
> > 		array_name.delete self
> > 	end
> > end
> >
> > However, this is deleting every account in the list (array_name ==
> > []). I've
> > verified that the account objects are unique. Just for an example,
> > this is
> > the equivalent of what's happening:
> >
> > class Account
> > 	def quit arr
> > 		arr.delete self
> > 	end
> > end
> >
> > a1 = Account.new
> > a2 = Account.new
> > arr = []
> > arr << a1
> > arr << a2
> > a1.quit arr
> > arr #=> []
> >
> > Has anyone else experienced this problem, or know what the likely
> > cause is? I
> > have other arrays that work in the exact same fashion and work as
> > expected.
>
> I ran your code and I didn't have a problem: it did what you
> expected. Are you sure that the code you posted is exactly the same
> as the code that is giving you trouble?
>
> Regards, Morton