Last iteration?

[Paul Hankin]

On Oct 17, 11:45 pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> [Paul Hankin]
>
> > def lastdetector(iterable):
> >     t, u = tee(iterable)
> >     return izip(chain(imap(lambda x: False, islice(u, 1, None)),
> >         [True]), t)
>
> Sweet!  Nice, clean piece of iterator algebra.
>
> We need a C-speed verion of the lambda function, something like a K
> combinator that consumes arguments and emits constants.

Perhaps, but I think you'll need a better use-case than this :)

Actually, would a c-version be much faster?

--
Paul Hankin