David Isaac wrote:
> > Michael Spencer wrote:
> > > This can be written more concisely as a generator:
>
>
> <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > If iterable has no elements, I believe the behaviour should be [init],
> > there is also the case of init=None that needs to be handled.
>
> Right. So it is "more concise" only by being incomplete, right?
> What other advantages might it have?
>
> > otherwise, that is more or less what I wrote for my scanl/scanl1.
>
> I didn't see a post with that code.
>
> Alan Isaac
def scanl1(func, seq):
def my_func(x):
my_func.init = func(my_func.init, x)
return my_func.init
i = iter(seq)
try: my_func.init = i.next()
except StopIteration: return []
return (chain([my_func.init], (my_func(y) for y in i)))
def scanl(func, seq, init):
def my_func(x):
my_func.init = func(my_func.init, x)
return my_func.init
my_func.init = init
return (chain([my_func.init], (my_func(y) for y in seq)))
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