On Monday, September 2, 2002, at 03:39 AM, Richard A. O'Keefe wrote:

> I also claim that
>
>     oldElements copy do: [:each | self remove: each]
>
> implemenents precisely the semantics required by the ANSI standard.
> "each element of oldElements" is visited; the text says nothing about
> sending any enumeration message to oldElements itself.

Except on collections where it doesn't: Richard's reasonable code 
presumes that the collection answers to copy in the manner expected.

This code fails, for example, on a LinkedList.