On 8/29/10 8:33 PM, Carl Eastlund wrote:
On Sun, Aug 29, 2010 at 8:32 PM, David Van Horn<dvanh...@ccs.neu.edu>  wrote:
On 8/29/10 8:27 PM, Carl Eastlund wrote:

What do you propose for/first should return if the set s is empty?


Which will do what in a 2-valued context?

Blow up I suppose. I don't care; I'm not going to use for/first with an empty set.

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