The Nineteenth Byte - 2020-10-01

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caird coinheringaahing

12:00 AM

@RedwolfPrograms I was actually just thinking about this, and wondering about organising an event where users "nominate" a question they think went "underappreciated" and people spend a day/week/month/lifetime trying to answer that question

Something similar to LotM

@RedwolfPrograms that's just how it works lol. Triviality oftentimes pays well

Redwolf Programs

There was something similar for answers one time, wasn't there?

This

I agree there should be something similar for questions

If we can come to a community consensus and have a list of sandbox posts that we're sure should be deleted and have been independently reviewed by multiple people in the community, I'd be willing to spend some time to just run down the list and delete them all.

caird coinheringaahing

@Lyxal Well, its currently at 7750 answers, so I think it's passed 3k :P

@cairdcoinheringaahing yeah but that's including deleted posts

for <10k users like me it's only 2956

12:07 AM

every time i think about privileges I still by default think of the pre-design thresholds lmao

just habit

many of us don't see the extra 4794 answers y'all see

caird coinheringaahing

Deleted posts matter :P My phone crashes whenever I try to use the Sandbox. My phone. Not the SE app, but my full phone

@HyperNeutrino Same :( I remember, I got the "View site analytics" about a month before the new rep levels were announced, so it was heartbreaking to see my privileges drop so much

@cairdcoinheringaahing Ouch. that sucks lol. yeah when we got our design I was already 20k+ I think so I just needed a bit more to get site analytics which I still haven't really used I think

caird coinheringaahing

@HyperNeutrino Personally, I found them quite interesting but ¯\_(ツ)_/¯

Redwolf Programs

What all do the site analytics let you see?

caird coinheringaahing

12:09 AM

IIRC site traffic, where people came to the site from etc.

FYI at 5k you get full access to all privileges on non-graduated sites, compared to 25k on graduated ones

A list for a site still in Beta

@cairdcoinheringaahing so then how do we get rid of deleted posts if deleting them doesn't actually delete them?

caird coinheringaahing

@Lyxal Personally, I'd like a new Sandbox but I can understand the issues with that, so that's a question I'll be asking the community if we decide we want to clear up the Sandbox

I don't think there is a solution because I don't believe you can destroy posts.

You'd likely have to create a new sandbox in that case, and I'm not sure that's necessarily great. Crashing on mobile is a bit of a yikes though...

Redwolf Programs

How does that even happen? Is it not paginated on mobile?

caird coinheringaahing

Nope

Full list of answers

Redwolf Programs

12:19 AM

That seems like a pretty serious design flaw...is there a main meta post about it?

caird coinheringaahing

Its why you might see me online for a couple of hours but I've not addressed your Sandbox question: I have to get to my computer to do that

@RedwolfPrograms SE stopped maintaining their app about 2 years ago IIRC

From the mobile-app on Mother Meta:

> The mobile app is NO LONGER SUPPORTED. This tag is for the official Stack Exchange mobile applications only. The app is available for iOS and Android on the App Store and Google Play store.

Well. rip mobile then

caird coinheringaahing

Yep :/

just use browser lol

thats how i roll

caird coinheringaahing

About a week ago, all usernames in comments went black (instead of normal blue) and the Users page is filled with black bars, so it's getting even more buggy as time goes on :/

@Lyxal Man, I hate mobile browser SE

Editing/answering/asking is so bad compared to every other way

12:24 AM

@cairdcoinheringaahing well at least browser has chat

caird coinheringaahing

Actually, chat is probably the only part of the app that isn't buggy :P

I have the app but almost never use it; I guess I get notifications on it? That's about it, but I check the site often so it doesn't even matter.

caird coinheringaahing

@cairdcoinheringaahing Only since January because time no longer has meaning

@HyperNeutrino Yeah, I only use it for notifications and to check HNQ

I totally don't spend ~6 hours a day sat at my computer "working" while actually browsing PPCG

Although I do have my new sets of dice to keep me occupied when PPCG's quiet :P

I unfortunately don't have the time for that anymore but I still spend a good like 2-3 hours lmao

caird coinheringaahing

@HyperNeutrino It's an advantage of a) working from home and b) working with very slow software :P

Relevant xkcd

Also, I just clicked on the "Random" button from ^ comic and got one that, as an 18 y/o, I'm not happy how relevant this is:

You should talk to the girl down the hall; I think you'd like her. Lemme know if you find out why she's ordering all those colored plastic balls.

Redwolf Programs

12:51 AM

I clicked random and got one that also applies to me

Man, there's future *everywhere*.

caird coinheringaahing

Just post the URL

@RedwolfPrograms Big into kayaking?

Redwolf Programs

No, big into traveling through time and realizing that it's really cool and there's a lot of future

caird coinheringaahing

Fair enough :P

Redwolf Programs

Whoa, what are the odds I click random five times and end up back on the first one

Relevant to everyone:

xkcd.com/627 (y'all click if you want)

Redwolf Programs

12:57 AM

Also relevant:

Haskell

caird coinheringaahing

A couple of comics were ok, but let's try not to clog up chat with large images

After this, I'd recommend posting any more comics as just URLs

Redwolf Programs

Yeah, definitely. I'm actually going to edit mine

caird coinheringaahing

Yeah, we all (generally) like XKCD, but there's no need to fully take up people's screens :)

Redwolf Programs

I wish there was a way to say "hey, SE, make this image medium sized"

Other than downloading it, resizing it, and posting an imgur link

'Are you stealing those LCDs?' 'Yeah, but I'm doing it while my code compiles.'

Well, here's one I can't relate to

Python gang

caird coinheringaahing

1:02 AM

Oh man. I'm usually Python gang, but I'm using VBA in my current job :/

Although, tbh, I'm more Jelly gang then anything

"My link is executing"

Redwolf Programs

I'm Javascript gang. "My code isn't doing anything because you're using an outdated browser and nobody enforces any standards"

caird coinheringaahing

But have you made sure it works for IE2???

3

Redwolf Programs

Anyway I gotta go make dinner, I'll be back in a little while.

1:42 AM

@HyperNeutrino if you're Keg or Vyxal gang then it's "my code is transpiling" lol

Write a loop of compilers. Then your code can be compiling forever.

278

Q: Make it look like I'm working

Often, I find myself running a script or query that will take a significant amount of time to run. I can leave that script open and enjoy some guilt-free procrastination. Now, what if I could write a script that seems to be one of the above scripts to any onlookers, but in looks only? I could p...

popularity-contest underhanded

146

Q: Shortest Code to Legitimately Slack Off

I'm a developer, and I don't feel like doing my work. I know from XKCD that the best excuse for slacking off is that your code's compiling. Because of this, I think I need some code that will compile forever! And because I'm lazy and don't want to have to type much, this has to be done with the s...

code-golf compile-time

2:00 AM

I just noticed this, but it seems that a link pointing to a deleted answer will fail to be "Secure" according to Chrome

example codegolf.meta.stackexchange.com/questions/1061/… (for those who can see deleted posts; it's just an outdated meta consensus)

is this new and is this happening for anyone else?

not sure what determines whether it is unsecure. for example, this deleted answer is still secure

Huh. Not for me... that's kinda weird

does the link I pasted show as insecure for you too?

@HyperNeutrino yeah. For me, anything on the second page shows up as insecure, while page one is fine

Redwolf Programs

What's the blue number next to my icon? It says "new spam/offensive" or something and links to a room I've never been in with people I've never known

@JoKing Huh. that's really odd, well I have no clue what that could be, maybe could make a main meta post but idk if it's too much of a problem

@RedwolfPrograms the blue number indicates flags

I forget how flags specifically work but anyone with 10k+ network rep can see chat redflags and address them

Redwolf Programs

2:14 AM

Ohhh, I didn't know that. Never realized I was above 10k network rep in the first place, actually.

Reputation gain creeps up on you pretty quickly :P It must've been a long time ago when I reached network-wide 10k so I don't really remember the moment but it was definitely a bit of a surprise

Maybe the flag was already resolved by the time I checked chat again but I wonder why I didn't see it

does it only notify people on the site that the room belongs to?

Redwolf Programs

Maybe you have to be a member of whatever site it's associated with? It looked like it might be worldbuilding related.

That would explain lol.

I remember one time I was online like within a month of getting 10k network rep I think? and there were like 8 flags and I was just kinda like

o_O

Redwolf Programs

Didn't really seem spam or offensive, just looked like some people arguing. I didn't read much because it was just a discussion between two people and I didn't want to seem like I was spying on them :p

Huh, odd. yeah some people use chat flags for stuff they just don't like and it's annoying for people to deal with but, what can you do, that happens..

does chat also have the thing where six flags instantly destroy a message?

Redwolf Programs

2:23 AM

Not sure, but I doubt they'd remove that for chat. Upon further inspection, the flag was on a somewhat heated discussion about the viability of living in salt mines if the earth was teleported away from the sun. Only on worldbuilding...

uhhhh. well that's certainly a very intriguing topic to be having a heated debate about

though I guess a heated debate would be a good substitute if the sun's not nearby xD

1 hour later…

3:33 AM

Anyone been to six flags before?

Redwolf Programs

Never been, but I do have a fun fact about it: the reason it's called "six flags" is because it's headquartered in Texas, which has had six flags fly over it: Spain, France, Mexico, Republic of Texas, Confederacy, and United States.

2 hours later…

5:37 AM

that is coool

1 hour later…

6:39 AM

Golfing pro tip: wait a few days before posting your explanation, so you don't have to keep changing it when people suggest golfs.

But then you get fewer upvotes in the long run

CMC: What formatting methods do you prefer for your code explanations?

@JohnDvorak it's a worthy trade imo

fair point

@Razetime That would be a CMP or CMQ.

CMQ: What formatting methods do you prefer for your code explanations?

6:45 AM

no, no, no, it is a challenge to find some method in our innate madness.

back to CMC then? @Adám

:-)

@Adám Happiness Rating: 2

:-⟅

@Adám 1

⟅ which key gives this character in the kb layout?

6:54 AM

I don't have that one. Did copy-paste.

Golfing pro tip: write a golfed answer that's the shortest possible, so you don't have to keep changing it when people suggest golfs.

@xnor booooooo

no shade allowed here

Hey, does anyone have an idea how I can get the names of the installed fonts (not their file names, that's easy) under Windows?

Found this

Uh, Flash… shudders

7:01 AM

@Adám PowerShell

@Razetime Neat. Thanks a bunch!

7:18 AM

Golfing pro tip: Write in an obscure language so that no-one can even try to golf you

Noted!

How can I get the Husk chatroom unfrozen?

Unrelated String

Think it's just a matter of asking a moderator

yep that;s it

Thanks. @JoKing, would you mind unfreezing it?

Also, late congrats to you and the other new mods!

7:32 AM

2

Q: Amount Of Potential Keys That'll Fit The Lock

Introduction: You're a key maker, and want to access something from a safe that has a lock. Unfortunately, the key to that lock is lost, so you'll have to make a new one. You have access to a bunch of blank keys, to which you can add notches to turn it into actual keys. You also have loads of key...

code-golf number integer

0

Q: Shortest C program which compiles to largest file size

Challenge This challenge is to create the shortest C program which compiles to the largest file size. Your score for this challenge is Size of compiled binary in bytes / Length of program source code The winner of this challenge will be the person with the highest score. Don't really know what to...

code-challenge c

@NewMainPosts aka who can generate the largest size array

Bowling pro tip: use something like Lenguage or Unary lol

@Razetime I've used a good variety but I mainly use 3 methods: 1. Character by character walk through (with comments) (either aligned under a full copy of the program or column aligned), 2. A more narrative approach (actually writing big chunks of explanation) and 3. List the steps the program takes and the characters that do so

Example of point 1, Alternate example of point 1, Example of point 2, Example of point 3

7:47 AM

wow a proper answer

nice

But of course, there's always exceptions: sometimes it's not code golf but a series of programs, sometimes a more broad picture is needed in the explanation

and I once gave a pretty much live update about how I was trying to get my program to work

I also tried using images once too!

@Lyxal this wins funniest answer award

@Zgarb Took a hot minute, but it's unfrozen now

8:09 AM

@JoKing Thanks!

@Lyxal did you make this manually?

@Razetime hand made in Ms Word

oh

8:26 AM

maybe there's some utility for writing these

It'll never be able to fully chunk code as we intend it

But that could make for an interesting challenge

Last time I gave a challenge suggestion, you got 18 upvotes

oh lol yeah

friendliness pellets!

9:09 AM

@Lyxal ok, lets have three inputs:

the code

the deltas at which the code needs to be split

and the explanatory string for it

and indentation depth

That's exactly what I was thinking

nvm, four

Post it and you'll get a ton of updoots

this is somehow more high effort than actually writing the thing manually smh

Lol

9:14 AM

you writing it or me?

Yours if you want!

9:35 AM

@Lyxal Related

@Lyxal it's gosh dang free rep

@Razetime hmmm, let answers decide indentation

Like whether they use tabs or spaces

4

Q: Language of the month for October 2020: Husk

In accordance with our meta agreement, since one candidate received more votes than the others, we have a new featured language! Throughout October 2020, our Language of the Month, nominated by myself, will be: Husk What's a Language of the Month? See the meta post for nominations. In short, du...

discussion language-of-the-month

9:59 AM

@Lyxal rep is temporary

although it is nice to get rep

10:13 AM

I feel sure that we had a challenge relating to placing n horizontal and n vertical dominoes in a square but I can't find it now...

11:12 AM

@Neil codegolf.stackexchange.com/a/205738/80214 ?

caird coinheringaahing

@HyperNeutrino Chat flags notify every 10k+ user in chat, but that means they get resolved very quickly, so you never see them

1 hour later…

12:39 PM

@Razetime yes, thanks, that was the challenge I was thinking of, even though it wasn't what I remembered

1:06 PM

lol imagine posting explanations for your answers

Redwolf Programs

1:23 PM

@rak1507 What's wrong with posting explanations? It gets you more votes and makes your answer more interesting and useful to other golfers

It takes so much effort

Redwolf Programs

But it helps other people and makes your answer better. Golfing takes a lot of work too, but you wouldn't post an ungolfed answer I'm sure.

caird coinheringaahing

The way I see it: if an answerer isn't willing to put in the effort to explain their answer, why should I put in the effort to upvote it?

@RedwolfPrograms looks nervously at code-bowling

Redwolf Programs

define callMeIshmaelSomeYearsAgoNeverMindHowLongPrecisely:

@cairdcoinheringaahing oh okay, makes sense

caird coinheringaahing

1:29 PM

Plus most rooms have 10k+ users in them so they get resolved extra fast :P

I don't seem to be able to edit a post, 'Suggested edits are not allowed on non-tag-wiki posts on meta sites.', what does this mean?

5

A: List of bounties with no deadline

100+ rep for APL answers to Bubbler's challenges To celebrate me (Bubbler) reaching 25k rep (with over 100 answers in APL, 50 challenges written, and several thousands of rep gained from Adám's APL bounties), I will share some of my rep for even more APL answers! Specifically, I offer 100 (or hig...

Trying to edit this ^

Redwolf Programs

You can't edit with less than 2k rep on meta sites. Is it an edit one of us could do for you?

Ah, probably

and bubbler's bounty isn't community wiki.

you should comment on the post or @ him here.

Ok

caird coinheringaahing

1:37 PM

I don't get that. We have a Suggested Edits review queue for meta, what's special about meta posts that mean we can't just do the same as main?

yeah that's kinda weird I wonder if there's a specific reason they don't want edit suggestions

Redwolf Programs

There are only 85 suggested edits on meta over all time. Probably tag edits.

(Compare that with over 12k on main)

caird coinheringaahing

Yep, they're all tag wiki edits

Last one was Jul 26

Redwolf Programs

Is there a way to get notifications when there's something in the review queues? I always want to help but there's never anything there

caird coinheringaahing

I use the Review Stalker userscript

I'll find a link to it, gimme a second

16

Q: Review Stalker Reloaded: A cross-site dashboard for reviews

About Based very loosely on the Review Stalker user script, this script has been rewritten several times since then. Its purpose is to be a one-stop pinned tab, always checking for review opportunities on main and meta as aggressively as is useful between multiple sites you configure. Usage...

Redwolf Programs

1:53 PM

Thanks!

caird coinheringaahing

You install it and whenever there's a review task available, it opens it in a new tab with a little magnifying glass icon

You have to keep a tab open on the reviews page, but beyond that it works great

It's why I'm in 6 5 of the "most recent reviews" things

Redwolf Programs

I stole your spot on suggested edits :p

caird coinheringaahing

Well, you were reviewing my edits :P

Redwolf Programs

Feels a little weird to be reviewing posts from someone with double my rep :p

caird coinheringaahing

I tend to try to ignore rep as much as I can. Helps me treat users by how I know them, rather than by some score. e.g. I've known HN for 3 years, training over in JHT (same with Mr Xcoder), and they both have loads more rep than me (and a mod diamond), but I view them as the people/personas they are, rather than by some number

But I know the feeling :P

Someone with 5k rep can review the tag edits for someone with 19.9k, which is definitely a weird feeling :P

Redwolf Programs

2:00 PM

I haven't spent much time interacting with other users before a few weeks ago, so I'm starting to get to know y'all I guess

lol nice to meet ya

Redwolf Programs

Wait, does y'all sound unusual to y'all? It's just the normal second person plural pronoun where I live :p

caird coinheringaahing

I never say it but I type it on occasion

But then again, "y'all" sounds weird in pretty much most non-American accents

Nah I don't mind it

It's not something I usually see but it's not too weird or anything :P

caird coinheringaahing

2:06 PM

@RedwolfPrograms It doesn't help that no one is suggesting edits :/

And that my internet is awful, so I keep missing them

I feel like our site especially doesn't have much room for edits because if you have an objectively good improvement to a post, you are supposed to comment it whereas normally it would make sense to edit the answer directly if you know it's 100% an improvement lol

caird coinheringaahing

Yeah, the "what can/can't be edited" is much stricter here

Most of the rejected edits I've done are for new/anonymous users trying to golf the code

Redwolf Programs

All of my approved edits/edits I've approved are either on tags or questions

most of my edits are probably formatting fixes especially on failed answer headers or questions that failed to use code block markdown correctly lol

@RedwolfPrograms i would be weirded out if i heard someone say it out loud irl

reading it isn't so bad

Redwolf Programs

2:17 PM

Where I live it's super normal, but it's not like we say it in a super thick Texas accent and wear cowboy hats

My school had us fill out "personality tests" for some sort of career day thing and I got a 0 on everything...am I that boring???

2:49 PM

uhhh

personality tests arent supposed to grade a personality.

they just need to categorize you personality

@RedwolfPrograms for all i know this is a bunch of hogwash meant to scare students into being slave workers

Redwolf Programs

I think it was a software glitch, everybody else got numbers around 20-50

hmm odd

maybe you have so much of a personality that it overflowed xD

must have been an unsigned short

also most personality tests you can get for free online are relatively meaningless anyway

Redwolf Programs

2:58 PM

Evidently :p

caird coinheringaahing

@HyperNeutrino Your latest answer, I think, falls under this deadline-less bounty of mine if you'd like to claim it

Oh, it does. Thanks for letting me know :D I'll leave a comment then

caird coinheringaahing

Don't worry about that :P

okay :P

caird coinheringaahing

I just wanted to check that you did want to claim it, I'll start the bounty in a bit :P

3:03 PM

alright thank you very much!!

TBH it's not an answer i'm currently overly proud of but it's okay and i'll definitely see if i can golf it down more

Redwolf Programs

How hard is a non-brute force answer?

caird coinheringaahing

As with all long Jelly answers, I feel like there are a few tricks to shave a couple of bytes off, but nothing is particularly obvious at first scan

I think I could do one in Python with moderate difficultly or possibly relative ease but it might not be very golfy

@cairdcoinheringaahing well I tried one thing which was to remove all the S$s and move summation to the end and it ended up changing the length by exactly 0 bytes :P

caird coinheringaahing

I definitely think the two ³ should be able to be removed, but tio isn't loading for me, so I can't test it :/

oh rip :/ yeah I think I can probably get rid of those too but I can't immediately see how

I remember when we were first learning Jelly I think someone liked using the $ and dyad combiner a lot and someone liked using the ^3/^4/^8/^9 things a lot, I can't remember which one I was and who the other person is

I found a way to change ØAœ!³L¤ into ØAœ!L}¥ for a total of... 0 bytes again ._.

3:15 PM

@rak1507 Made my post community wiki, so now you should be able to edit in your bounty claim.

Newly Featured Questions

3:49 PM

12

Q: Generate Menu Access Keys

This is thematically similar to Generate keyboard shortcuts for a menu, but its actually a pretty different challenge. Let's take PHPStorm's menu as an example: New Project New Open Directory Open Open URL New Project from Existing Files Save As Open Recent Close Project Rename Project We nee...

code-golf string

caird coinheringaahing

> Today: −112

Man, my heart stopped for a second :P

@cairdcoinheringaahing geez what happened

caird coinheringaahing

I set a bounty on that ^ question, but forgot about it for a second :P

whats the -12 for?

bounty tax?

caird coinheringaahing

No, I've already got +38 today, and the bounty's -150

3:59 PM

oh nice

4:25 PM

@JoKing @HyperNeutrino Can we get a featured tag on the Language of the Month for October? codegolf.meta.stackexchange.com/questions/19386/…

sure; do we usually feature LOTMs? I'm not sure what [featured] tag is exactly meant for, I thought it was only to highlight things like elections and consensuses or w/e

caird coinheringaahing

Not sure about this, but doesn't the Community user auto-feature popular posts?

> A special moderator-only tag to mark important meta discussions.

From the tag wiki, if that helps

@cairdcoinheringaahing I noticed that in the tag description but I'm not sure if LotM is considered "important" enough versus other things that might absolutely require community attention or immediate action

caird coinheringaahing

As far as I can tell, the LotM post wasn't featured last month

Redwolf Programs

I agree it shouldn't be featured, if it gains enough popularity (which it should) it'll be irrelevant anyway

4:37 PM

I just don't know if other LotMs have been featured because I don't think tag edits are logged in history

If LotM is usually featured or [featured] tag can be used on community events/things like this then I will gladly add it, but I agree with Redwolf and I think it's not really necessary and should probably be used specifically to draw attention to things the community needs to know

uhhhh... maybe I'm dumb but

where is the unprotect button? Hello World got auto protected again and I can't find the button to unprotect it

caird coinheringaahing

Underneath the question (with the share, edit, close links)

R LotM never had the featured tag

wait... i found it it's in the mod tools section so i don't see the regular button

that's why i couldn't find it :P

@cairdcoinheringaahing Okay, thanks. Why do I recall that tag edits from users that can directly edit without suggestion won't show up in history? Maybe I'm thinking of something else.

caird coinheringaahing

Community edits are sometimes ignored I think

oh okay

caird coinheringaahing

I keep getting AncientSwordRage mixed up with Dominic Van Essen cause their pfps are so similar :/

Redwolf Programs

4:47 PM

Any name ideas for a hexagon based esolang?

~~hexagony~~

dammit

thank you xD

caird coinheringaahing

@RedwolfPrograms Hex

Redwolf Programs

Creative, but it's already taken :p

HEX

@RedwolfPrograms permutohedron

caird coinheringaahing

4:49 PM

@RedwolfPrograms What kind of esolang?

although that implies a broader shape

Redwolf Programs

It uses the vertexes of a hexagonal lattice for operators

@RedwolfPrograms maybe permuto<sup>3</sup>

cause a hexagon is a third order permutohedron

caird coinheringaahing

Hexways?

Redwolf Programs

It uses self modification for some of its control flow, but also transistor-like operations

4:50 PM

how do i superscript here

why is the markdown different smh

caird coinheringaahing

You don't

life ruined

caird coinheringaahing

Mathjax doesn't work in chat, neither does html

chatting experience ruined beyond repair

Redwolf Programs

Maybe "hexplorer" or "hexpert"

4:52 PM

hexfunge

caird coinheringaahing

Any further feedback on this? I want to post a challenge soon and this looks to be my best at the moment

never seen this one before

I'll see if i can com eup with something

3 hours later…

caird coinheringaahing

7:55 PM

Man, I feel sorry for old PPCG questions. This is from a question I'm working on answering:

> Viewed 3k times

> Score: +4/-3

> Answers: 3

8:05 PM

oh rip. yeah many good old questions eventually just get buried under all the new stuff and kinda forgotten forever lol

Sometimes its for the best though.

caird coinheringaahing

Yeah, but there are a lot of good questions which are active for ~1 month then get forgotten about

And even more which would be perfectly up to our standards after a quick edit by someone who knows that they're doing

New Sandboxed Posts

8:28 PM

0

A: Sandbox for Proposed Challenges

AOG Day 1: The Advent Begins What good is Advent... without the actual Advent Calendar? Fortunately, we already have an advent calendar, so we don't need to worry about getting one of those! But since it's not a physical calendar, we can't open the doors with our hands; rather, it's a block of ch...

9:05 PM

0

Q: Bad matrix multiplication that gives the right answer

Executive summary: Print NxN matrices \$A\$ and \$B\$ where \$ AB = 10A + B \$. Largest N wins! Details: Entrants in this challenge should choose an N. Submit a program that takes an input integer 'seed', and produces two full rank NxN matrices \$A\$ and \$B\$, where each element of \$A\$ and \$...

code-challenge integer linear-algebra

Redwolf Programs

9:40 PM

@cairdcoinheringaahing Another reason an underappreciated challenges event would be nice

1 hour later…

10:46 PM

0

Q: Parse a nested parentheses

Objective Mimic Haskell's reads :: ReadS (). Or in other words, parse nested parentheses. Since the target type is () (the type with one possible value), "parsing" means discarding a leading nested parentheses. Valid Input "Nested parentheses" means (), (()), ((())), and so on. That is, leading n...

code-golf string parsing

caird coinheringaahing

10:57 PM

CMC: This. Given a matrix M consisting of integers, output the rational number x, that, when added to each element of M, makes the determinant of the resultant matrix 0

[[ 4, -4, 10],
 [-5, -8, -3],
 [10, -1,  7]] -> 10.42105... (= 198/19)

For any singular matrix, x = 0. If you can, check the comments of the Sandbox post, @xnor and @LuisMendo did an excellent job (independently) finding a formula for x

11:26 PM

^ a formula for x when M is not singular, that is

@cairdcoinheringaahing Sorry that the challenge turned out to be a near-dupe

Or maybe it's not a dupe after all?

caird coinheringaahing

11:55 PM

@LuisMendo It's fine, it happens to the best of them :P

Although I might have to post an inverse matrix challenge now...

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