On 1/6/2017 15:04, Peter Otten wrote:
Example: you are looking for the minimum absolute value in a series of
integers. As soon as you encounter the first 0 it's unnecessary extra work
to check the remaining values, but the builtin min() will continue.
The solution is a minimum function that allows the user to specify a stop
value:
from itertools import count, chain
stopmin(chain(reversed(range(10)), count()), key=abs, stop=0)
0
How would you implement stopmin()?
How about:
def stopmin (iterable, key, stop):
def take_until ():
for e in iterable:
yield e
if key(e) <= stop:
break
return min(take_until(), key=key)
?
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