On Nov 23, 2010, at 1:05 PM, Brendan Eich wrote:

> If you're implementing a container, then questions of mutability arise. 
> Immutable container proxies could have iterate, has,  and get. Mutable 
> containers might rather vend iterators via specific API methods, where the 
> iterators are separate proxies that iterate over snapshots. There are lots of 
> possibilities.

For some reason I typed "container" where I meant "collection" -- could be that 
both terms work, but collection is better.

/be

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