Re: [nimh-dev] More stuff

[Joel Uckelman <uckelman@xxxxxxxxx>]

Thus spake "Jon Stewart":
> > Oh, ok. Well, it might make sense to validate but not explode sequences. 
> > Say I have a folder with 10k messages in it, and I do 'scan 1-10000'. I'm 
> > not sure that we should create an array with 10k elements at parse-time. 
> > Anything which needs the actual message numbers can just call 
> > sequence.message_numbers(), and the expansion could be done then.
> 
> 
> As far as implementation goes, a generator/iterator type of function would 
> be a good idea. Each time you call it, the function evaluates lazily and 
> returns the next message item. Kind of a high-level functional technique, 
> so there's some overhead, but it is scalable. We could also use it, in the 
> future, to define infinite sequences, filtering, etc.

That will be useful in the limit when the number of messages I have reaches 
infinity.

-- 
J.


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