Dan,
I can live with this explanation. No more is
needed. Thanks, again.
On Wed, 31 Oct 2007, Dan Bron wrote:
+ Ah, after I posted I'd wondered if I'd answered the wrong question. I'll
post a more considered reply later (the technical answer is related to my
original reply).
+
+ But, for now, you might take the outlook that x+y adds all corresponding
pairs of numbers in x and y . In your example, x is empty, so there are
zero pairs of numbers; consequently, zero additions are performed, producing an
empty result.
+
+ That it was not an error is a direct consequence of the rule I hightlighted
in my original reply.
+
+ -Dan
+
+ ----------------------------------------------------------------------
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+
(B=)
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