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From: lutz@iks-jena.de (Lutz Donnerhacke)
Newsgroups: comp.lang.ada
Subject: Re: Container reqs
Date: Fri, 19 Oct 2001 08:44:52 +0000 (UTC)
Organization: IKS GmbH Jena
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* Jeffrey Carter wrote:
>Lutz Donnerhacke wrote:
>> >By "ordered" I mean a structure where the position of an Element within
>> >the structure is determined by the value of the Element. What is the next
>> >Element in the structure if the current Element has moved?
>> 
>> Wrong preconditions. You talk about arrays, but even those needs not to be
>> counted continously. Example:
>
>No, I didn't mention arrays. I'm talking about iterating over an ordered
>data structure. Some action is applied to the current Element, then to
>the next Element, where "next" is defined by the structure.

Exactly. Where is the problem with changing the underlying structure while
iterating? Databases offer serveral isolation levels for this.