Deduplicate - Count Digits of Factorial

[hobovsky]

1. Factorial length

• 6 kyu
• No fixed tests for edge cases (zero, eventually 1)
• Satisfaction 83%, 626 solutions
• No pending issues
• 6 languages + 3 pending translations
• Published Oct 2017, authored by KenKamau (active)

2. Simple Fun #206: Factorial Digits

• 5 kyu
• Satisfaction 90%, 318 solutions
• No pending issues
• 6 languages + 1 pending translation
• Published Apr 2017, authored by myjinxin2015 (inactive)

Both kata allow for O(n) solutions (sum of logs), or even O(n log n) solutions (split all of 1...n into digits), at least in languages I checked. None of them seems to enforce a O(1) solution. None of them seems to allow for solutions based on naive multiplication.

[hobovsky]

My vote:
I do not have a strong preference here, but I lean towards keeping 1. as ranked more accurately, having more languages, and being actively maintained. 2. would be retired.

[krishsharma0413]

keep 1 retire 2

[ejini6969]

I voted for keeping 1. since it has many languages and rank is appropriate and require less migration from the other one.

Only thing is to add edge cases for all languages, update them to latest framework and migrate Factor from myjinxin's one!

[hobovsky]

@FArekkusu please see this discussion for follow-up: #68

[Kacarott]

While I think the title and rank of the first one are better, if changing the rank of the second one is fairly simple then I think I would prefer to keep the second one and rerank. The second one is older, after all, and I think with everything else being close to equal, the older kata should have priority.

If reranking is undesirable, then the first one should be chosen. However if we are comparing levels of work/effort, I think that the effort spent reranking the second kata will still be less than the potential effort spent "working around" a troublesome author.

and migrate Factor from myjinxin's one!

Well, I would be unable to even post a migration of my translation to the other kata as a suggestion, due to being blocked. :)

[EloiseRosen]

I thought this was more 5kyu than 6kyu but everyone disagrees so maybe I'm just dumb

[akar-0]

I thought this was more 5kyu than 6kyu but everyone disagrees so maybe I'm just dumb

If that reassures you, I also think it could be rather an (easy) 5 kyu rather than 6, but the solution is spoiled all over the internet... About KenKamau, for known reasons he should not be considered an active maintainer, but anyone can contribute to katas so it's not such a big problem. Eventually, keep 1 could be the best solution.

[armeanco]

My vote: 1.Factorial length

[KayleighWasTaken]

1. no longer allows O(n) solutions to pass in Python, only O(1), 2. is unaffected by this.