On 11/8/12 6:26 AM, Simon King wrote:
Hi David and John,
On 2012-11-08, David Loeffler <d.a.loeff...@warwick.ac.uk> wrote:
It is *really awful* that V.sum(W) attempts to sum all the elements of
W! I don't know what general design decision underlies this but I
don't like it.
That's easy to explain. All additive semigroups should be able to sum up a
list of their elements. Hence, such as summation method is defined by
the category framework.
Are there any examples where it is more complicated than just sum(args,
self.zero())? If not, I think I side with John in questioning the value
of the function.
If each element of args was changed into an element of V before summing,
then it seems that the function's utility might be argued more strongly.
Something like:
sum((self(i) for i in args), self.zero())
Thanks,
Jason
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