On Oct 29, 6:57 pm, GHZ <[EMAIL PROTECTED]> wrote:
> Is this the best way to test every item in a list?
>
> def alltrue(f,l):
> return reduce(bool.__and__,map(f,l))
>
> def onetrue(f,l):
> return reduce(bool.__or__,map(f,l))
Probably not, because it doesn't take advantage of short circuiting.
You could bail out of alltrue as soon as the first item you see is
false, but your version applies f to every item in the list. I would
suggest the most straightforear way is the best:
def alltrue(f,l):
for item in l:
if not f(item):
return False
return True
On Python 2.5, you could do this:
all(f(x) for x in l)
Carl Banks
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