It's a real problem for me too, I also wonder what was the intention behind 
this. I guess there could be a very good reason for this special treatement 
of nils, but I haven't seen it yet. 

I would love to hear about this from people involved in core.async 
development.

On Friday, August 16, 2013 4:44:48 AM UTC+2, Mikera wrote:
>
> Hi all,
>
> I'm experimenting with core.async. Most of it is exceptionally good, but 
> bit I'm finding it *very* inconvenient that nil can't be sent over 
> channels. In particular, you can't pipe arbitrary Clojure sequences through 
> channels (since sequences can contain nils). 
>
> I see this as a pretty big design flaw given the ubiquity of sequences in 
> Clojure code - it appears to imply that you can't easily compose channels 
> with generic sequence-handling code without some pretty ugly special-case 
> handling.
>
> Am I missing something? Is this a real problem for others too? 
>
> If it is a design flaw, can it be fixed before the API gets locked down?
>

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