[Python-3000] iostack and Oh Oh (original) (raw)

Bill Janssen janssen at parc.com
Sat Dec 2 02:47:03 CET 2006

Actually, to me the thing that's a stretch from current practice is the attempt to spell out in detail what a "mapping" is.

Good point :-). Of course, that's the problem I'd like to see fixed -- not knowing what a mapping is, or whether a particular value is one.

I'm not saying there is no such thing as "mapping", IOW, I am saying that "mapping" is an informal shorthand for a collection of operations. If you want to be specific, refer to operations. If you wish to be concise (but vague) then refer to "mapping".

I think we're in agreement here. It's just that using interfaces lets us capture aspects of the semantics of that grouping of operations which may not be expressible in the description of the operations themselves. And using types to define interfaces allows us to re-use code in a way that's just not possible in other interface-based languages, like Java.

Bill

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