Hi,

> I had to use Aggregate here, instead of Store(), else the Except does not 
> work.

The except() does work, but you have you understand how it works with respects 
to the semantics of aggregate() and store().

        store = lazily store objects in the pipeline to some collection x
        aggregate = greedily aggregate objects in the pipeline to some 
collection x before moving onto the next step.

So, except's excepted collection will be growing over time. However, with 
aggregate(), its collection is stable as it has already been greedily filled. 
Get it?

> I am not sure if I can call _() an identityPipe, any inspiration here?


You mean between the two as()? Why not?

Enjoy,
Marko.

http://markorodriguez.com


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