#16913: Error in prev()
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Reporter: ayyer | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: combinatorics | Resolution:
Keywords: permutations, | Merged in:
prev | Reviewers:
Authors: André Apitzsch | Work issues:
Report Upstream: N/A | Commit:
Branch: | a2406cd669acf5af044738f24c711b1f5526f3a5
u/aapitzsch/ticket/16913 | Stopgaps:
Dependencies: |
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Comment (by aapitzsch):
Replying to [comment:2 vdelecroix]:
>
> - What about `range(n-2,-1,-1)` instead of `reversed(range(0,n-1))`?
I prefer the latter because it's less error-prone and there is almost no
difference in speed
{{{
$ python3 -m timeit -n 100 'for i in reversed(range(100000)): continue'
100 loops, best of 3: 3.54 msec per loop
$ python3 -m timeit -n 100 'for i in range(99999,-1,-1): continue'
100 loops, best of 3: 3.55 msec per loop
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16913#comment:4>
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