[Newbies] Proper object removal

[Rob Rothwell]

On Wed, Jun 4, 2008 at 3:55 AM, Norbert Hartl <norbert at hartl.name> wrote:

>
> The objects are still referenced in the collection you get
> from self selected. The line with "each := nil" is useless
> as each is only a temporary variable. I assume that you want
> to empty the selected collection as well. you could do
>
> DataManager>>deleteSelectedAbstractors
>   self selected copy do: [:each |
>   self abstractors remove: each.
>   self selected remove: each.
> ]


So...why would I use a copy (self selected copy) in this case?  Is that a
clue to my misunderstanding?

Rob
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