switch recipe?

[Emile van Sebille]

Mark McEahern
> Because I want to do something to the zipped items, it doesn't seem
like zip
> solves all my problems, though.  map would, if it had the same
behavior as
> zip--namely that it stopped once one of the iterators ran out of
items.
> Below is a version that shows the use of zip.  Here are the key lines:
>
>         weaved = zip(iterator, alternator)
>         generated = [color_item(x, y) for x, y in weaved]
>
> Perhaps what I'm still looking for is a way to
> weave-two-iterators-with-a-function all at once.  One solution would
be to
> modify or wrap repeating_alternator() so that it was finite--then I
could
> just use map.

doesn't this do it?

generated = [color_item(x, alternator) for x  in iterator]

(BTW, I nominate cycler as a name for alternator ;-)

--

Emile van Sebille
emile at fenx.com

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