find all multiplicands and multipliers for a number
no.email at nospam.invalid
Wed Apr 15 19:37:44 CEST 2015
Chris Kaynor <ckaynor at zindagigames.com> writes:
> That code is substantially different that the code that Steven
> D'Aprano posted: Steven's uses filter to call the lambdas, while your
> calls the lambdas from another lambda.
I wouldn't have thought it made a difference, but apparently it does.
> Basically, yours has direct recursion in the Python code, while
> Steven's does not.
I would have said: both have deeply nested function calls but no
recursion per se.
I did another test with Python 2.7.5 under Idle:
from itertools import ifilter
def f(xs): return ifilter(lambda x:True, xs)
xs = range(10)
for i in xrange(n): xs = f(xs)
and it seemed to survive up to around 130k nested filters, with a
slightly non-deterministic limit: 130900 worked some of the time and
crashed some of the time. Interesting.
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