Activity for user
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #286855 |
Post edited: |
— | over 2 years ago |
| Comment | Post #286855 |
Could we return an infinite sequence of Niven numbers or return only the nth Niven number? (more) |
— | over 2 years ago |
| Edit | Post #286858 |
Post edited: |
— | over 2 years ago |
| Edit | Post #286858 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Find n Niven Numbers Scala, 52 bytes ```scala Stream.from(1).filter(x=>x%(x+"":\0)(+-48) sum + char.toInt - '0'.toInt)`. At the end, only the first `n` Niven numbers are `take`n from the infinite list. (more) |
— | over 2 years ago |
| Suggested Edit | Post #286855 |
Suggested edit: (more) |
helpful | over 2 years ago |
| Edit | Post #286534 | Initial revision | — | over 2 years ago |
| Answer | — |
A: From the smallest seed Zsh, 61 bytes n=2;s=s=%q\;printf\ n=\$n\$n\\\;\$s\ \$s;printf n=$n$n\;$s $s Attempt This Online! A trivial modification of this quine: `s=s=%q\;printf\ \$s\ \$s;printf $s $s`. `n` goes from 2 to 22 to 2222. (more) |
— | over 2 years ago |
| Comment | Post #286240 |
Can we use something other than asterisks? (more) |
— | over 2 years ago |
| Comment | Post #285891 |
Oh ok (pad pad pad) (more) |
— | almost 3 years ago |
| Edit | Post #285895 | Initial revision | — | almost 3 years ago |
| Answer | — |
A: Can you give me half? Scala, 15 bytes ```scala '#'.toFloat/'F' ``` Try it in Scastie! Characters in Scala kinda get casted to integers. This is usually annoying, but it's useful when golfing. `#` is 35 and `F` is 70, and the `.toFloat` prevents it from doing integer division and truncating to 0. (more) |
— | almost 3 years ago |
| Comment | Post #285891 |
I think the second works in 05AB1E too (more) |
— | almost 3 years ago |
| Edit | Post #285832 | Initial revision | — | almost 3 years ago |
| Answer | — |
A: Keyword golfing Scala 3, 553 bytes ```scala package a import E.Z as Z import E. sealed trait T open class Y{export E.Z as Q} enum E[+A]derives CanEqual: case Z end E private abstract final class X extends AnyRef with T{protected opaque type T>:0=0 lazy val x:X#T=0 override def toString:String={var e=0... (more) |
— | almost 3 years ago |
| Comment | Post #285231 |
True, I've edited that out now. (more) |
— | almost 3 years ago |
| Edit | Post #285231 |
Post edited: |
— | almost 3 years ago |
| Edit | Post #285478 | Initial revision | — | almost 3 years ago |
| Answer | — |
A: Determine whether an integer is square-free Scala, 41 bytes ```scala x=>2 to x forall(d=>x%d+math.sqrt(d)%1>0) ``` Try it online! Pretty straightforward (more) |
— | almost 3 years ago |
| Comment | Post #285477 |
Some testcases would be nice (sorry for not bringing this up in Sandbox) (more) |
— | almost 3 years ago |
| Comment | Post #285231 |
Yup, those won't be given as inputs. (more) |
— | almost 3 years ago |
| Edit | Post #285231 | Initial revision | — | almost 3 years ago |
| Article | — |
Create a finite projective plane of order $n$ Introduction Finite projective planes are an interesting geometric structure. A finite geometry is a system with a finite number of points, and a projective plane is a plane where every pair of lines meets at exactly one point. Finite projective planes do both of these. Here are their properties: ... (more) |
— | almost 3 years ago |
| Comment | Post #285064 |
Unfortunately, I don't this would work, as the maintainer of TIO (Dennis on CGCC) isn't too available ([context](https://chat.stackexchange.com/transcript/message/53428659#53428659)). However, there are alternatives to TIO popping up, such as [ATO](https://ato.pxeger.com) (more) |
— | almost 3 years ago |
| Edit | Post #285214 |
Post edited: |
— | almost 3 years ago |
| Edit | Post #285214 |
Post edited: |
— | almost 3 years ago |
| Edit | Post #285214 | Initial revision | — | almost 3 years ago |
| Answer | — |
A: Find the IP address class Vyxal, 24 bytes ``` \.€hEb:L8-0wẋf$J0ḟkA5Ẏ$i ``` Try it Online! This is absolutely abysmal but whatever. A lot of bytes are taken up by trying to pad the list with zeroes (`ẋ` was buggy or something so molding to `0 8ẋ` didn't work). Explanation: - `\.€` splits on `.` and `h` gets the firs... (more) |
— | almost 3 years ago |
| Comment | Post #284668 |
@#8056 I'm really sorry, but I'm not sure what exactly rules of inference are, I've kinda given up on this draft because I don't know enough logic to make it work. Feel free to post a version of it yourself if you want, though. (more) |
— | almost 3 years ago |
| Edit | Post #283796 |
Post edited: |
— | about 3 years ago |
| Comment | Post #283796 |
@#36356 Thanks! (more) |
— | about 3 years ago |
| Comment | Post #284777 |
Just to be clear, this is just for IPv4, right? (more) |
— | about 3 years ago |
| Edit | Post #284668 | Initial revision | — | about 3 years ago |
| Article | — |
Prove that $A \leftrightarrow \lnot\lnot A$ (WIP) Task Prove that $A \leftrightarrow \lnot\lnot A$ using only the following axioms: 1. $P \rightarrow (Q \rightarrow P)$ 2. $(P \rightarrow (Q \rightarrow R)) \rightarrow ((P \rightarrow Q) \rightarrow (P \rightarrow R))$ 3. $(P \rightarrow Q) \leftrightarrow (\lnot Q \rightarrow \lnot P)$ S... (more) |
— | about 3 years ago |
| Edit | Post #284586 | Initial revision | — | about 3 years ago |
| Answer | — |
A: Tips for golfing in Java Abuse anonymous classes Warning: This only works in very specific circumstances, and I've never actually needed it. Instead of defining a method outside of your method, you can make an instance of an anonymous class to act as a closure. This'll only really help if what the method is closing ove... (more) |
— | about 3 years ago |
| Edit | Post #284585 | Initial revision | — | about 3 years ago |
| Answer | — |
A: Tips for golfing in Java Abuse the C-like array syntax If you ever have to declare two variables, one of type `X` and the other of type `X[]`, instead of two statements, you can declare them together using this atrocious syntax: ```java int i,a[],m[][]; ``` This defines an `int i`, an `int[] a`, and an `int[][] m`. ... (more) |
— | about 3 years ago |
| Comment | Post #284584 |
Great tip! It's not just Strings, Java 9, 11, etc. added some methods to `Stream`s too (e.g. `takeWhile`). The newer versions actually makes programming in Java enjoyable. There's also `Map.of`, although that's less often needed. (more) |
— | about 3 years ago |
| Comment | Post #284578 |
Just don't use Java :P (more) |
— | about 3 years ago |
| Comment | Post #284493 |
@#53503 Sure, but I think "Works for me" helps you trust that someone actually tried an answer out and saw that it worked. Often, upvotes are given out without necessarily checking that a piece of code works. I think it *could* useful for proper Q&A sites, but we don't really need it. (more) |
— | about 3 years ago |
| Edit | Post #284493 | Initial revision | — | about 3 years ago |
| Answer | — |
A: Reactions on Code Golf Codidact I think "Dangerous" could perhaps stay on. "Outdated" would probably be better off replaced with "Invalid" or something of that sort. I don't think we need "Works for me" or an analog of it at all: I don't entirely disagree with Quintec's suggestion of "Interesting/Cool/Wow" but showing your support ... (more) |
— | about 3 years ago |
| Edit | Post #279407 |
Post edited: |
— | about 3 years ago |
| Comment | Post #284001 |
[268](https://tio.run/##dVLLboQwDLz3KxCnXWlvvVSV@iWIQ8iaxWpIIvMS/XkaOw/60J4MztjjGdvv8@Ds65un4@g/jBq7u6q69war3lGFFdqmJrjXt3oHY9wWPh4EYEPsyG0cJ63IwMwZo/RniE4PBCF6UHoIkZZu57TBldMruojvlTQwGOq4sTNMpAennVEzQ0e1SIkmUKNEHCcnrGhWIG7uJkaor0U4DYzyTss0CUkYl8n9Qt4wYBtQWnu0Misp@wAZfoG6xV5EV117eEI7X/pL016vL@XnlM/4W... (more) |
— | about 3 years ago |
| Suggested Edit | Post #279407 |
Suggested edit: (more) |
helpful | about 3 years ago |
| Comment | Post #284001 |
Here's a [311 byte](https://tio.run/##dVLLjoMwDDzDVyBORdvb3irxJaiHkJribkiQIa3an2djk8A@1JOJGXvsGY/PuXf2c1lU3ZQEl/JYPsEY9wgfVwKwIbbkHhwnrcjAzBmj9FeITvcEIY6gdB8i@fbJaYN3Tt/RrfhOSQODoY4bO8NEunfaGTUzdFBeSjSBGiTiMDlhRXMH4uZuYoR6eeE0MMh/8tMkJGFcJh89jYYBjx6l9YhWZiVlryDDeyjP@QW6oju01SnPdN2c86xzVGCBtlAhJa8bv1p... (more) |
— | about 3 years ago |
| Edit | Post #283770 |
Post edited: Don't use "program" or "function" |
— | about 3 years ago |
| Suggested Edit | Post #283770 |
Suggested edit: Don't use "program" or "function" (more) |
helpful | about 3 years ago |
| Edit | Post #284191 |
Post edited: Figuring out if it's a good idea is exactly what the Sandbox is for, no need to explicitly state it :) |
— | about 3 years ago |