The Nineteenth Byte

12:04 AM

@flawr I edited my question to include a detailed explanation of how to execute movement.

user202729

12:29 AM

@iPhoenix As I can see in the post, "as fast as possible" doesn't seem to enforce anything, and "random" has no distribution specification.

Define "significantly interfere"?

Congratz myself for getting >=5000 rep! Now I wonder why should I need the site analytic...

iPhoenix

As fast as possible means that you shouldn't add code (like pauses, etc) to intentionally slow down your program unless it is too fast. And congratulations!

As for random, I'm accepting the

user202729

Unobservable rules.

iPhoenix

errm

@user202729 what exactly do you mean?

user202729

"you shouldn't add code (like pauses, etc) to intentionally slow down your program ..."

Because there may exists some languages where sleep(1) is shorter than sleep(0.01). (arguments of sleep are in seconds)

iPhoenix

I'll remove the clause

user202729

12:38 AM

"determinate"? "deterministic"?

iPhoenix

Same Input should give the same output each time

user202729

Just look up the words in a dictionary, probably the same.

@iPhoenix "accepting the" ?

So... reopened.

What is "apply a vector to a direction"?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Longest Non-repeating substring Given a string as input find the longest contiguous substring that does not have any character twice or more. If there are multiple such substrings you may output either. You may assume that the input is on the printable ASCII range if you wish. This is code-go...

iPhoenix

The direction itself is a vector, so you'd average the two vectors. I'll link a pseudocode implementation to my post to help clarify things.

@user202729 I modified my post to remove some of my ambiguities.

I accidentally pressed enter on the above sentence fragment.

Esolanging Fruit

1:27 AM

@Mr.Xcoder Rather demoralizingly, it was actually the first answer.

New Sandboxed Posts

1:43 AM

0

A: Sandbox for Proposed Challenges

Is it CVC palindromic? Given a string of letters, determine if it is a palindrome of vowels and consonants. This was inspired by one of my little brother's kindergarten goals for the year, to be able to recognize CVC words (consonant-vowel-consonant, i.e. dog). aeiouy are vowels Example In...

HyperNeutrino

I did a physics thing but I feel like it's wrong. Can anyone point out any errors in it?

tfbninja

2:00 AM

@DJMcMayhem any thoughts on this or that ↑ sandbox post?

HyperNeutrino

2:23 AM

oeis.org/A000222 & oeis.org/A000033 & oeis.org/A000159 ???

PhiNotPi

@HyperNeutrino I'm wondering why your answer is different than geostationary orbit.

HyperNeutrino

I'm wondering why the numbers are different. It makes sense that the other answer is right (and I'm probably going to delete mine since it doesn't appear right anyway) but like I'm pretty sure I did the math correctly so idk :?

PhiNotPi

Oh, duh.

The question is asking for acceleration of 1 G, but in real life gravity is weaker when you are out at geostationary orbit.

HyperNeutrino

wait so which answer is wrong lol

or both

PhiNotPi

I guess it depends a little bit on what "1 G of gravity" means.

HyperNeutrino

2:30 AM

oh okay

also when I try to trash files in Atom it errors and asks "is gvfs-trash installed?" (it is); any suggestions? I tried looking on the internet but it's just telling me how to install it, but I already have it installed.

huh the newer math answer gives an entirely different number as well... weird

oh that one includes the radius of the earth. still a big difference from mine tho¯\_(ツ)_/¯

PhiNotPi

One question is, does the 1G mean the amount due to the centripetal force alone, or do they mean the combined centripetal + gravitational forces?

In the first scenario, you'd have 1G pulling you outwards and a little less than 1G pulling you inwards (because gravity is weaker further away), so you wouldn't actually feel very much acceleration.

HyperNeutrino

That is a good question. I think I mentioned that in my answer IIRC but that does add a few more considerations because then you'd need to subtract the gravity of the Earth which introduces a few more things to the equation.

yeah

PhiNotPi

Geostationary orbit is incorrect as the problem is written because that is the height at which centripetal force = force of gravity, but both of those are less than 1G when you're that far away.

HyperNeutrino

Ah true, I see. That makes sense.

Downgoat

2:59 AM

@HyperNeutrino github.com/atom/tree-view/issues/799#issuecomment-238135395

HyperNeutrino

@Downgoat thanks; didn't work though unfortunately

Downgoat

do you own the .Trash folder?

HyperNeutrino

well I sudo chown'd it

so I should now

Downgoat

whats output if you run touch apple; gvfs-trash apple

HyperNeutrino

no output

Downgoat

3:03 AM

odd

OS?

HyperNeutrino

linux mint

ubuntu 14.04.1 or something like that

Pavel

Please upgrade your Linux

HyperNeutrino

i did? i thought

well i restarted my computer a few days ago and a lot of stuff's different now so i'm assuming that it upgraded or something like that. i ran the upgrade command and it didn't error and it reset/changed some of my workspace appearance settings so i thought it updated but apparently not

Pavel

@HyperNeutrino Ubuntu 14 is called that because it was released in 2014

HyperNeutrino

oh

wait is my computer even that old

i mean i don't think i ever upgraded my OS ever since I installed it lol

how should i do that though

Pavel

3:13 AM

The latest Mint definitely runs on at least Ubuntu LTS 16, maybe even LTS 18.

HyperNeutrino

i tried and it doesn't seem to do anything¯\_(ツ)_/¯

Pavel

sudo apt update
sudo apt dist-upgrade
sudo apt install mintupgrade
mintupgrade check
mintupgrade download
mintupgrade upgrade

@HyperNeutrino Run ^ and press the y key when prompted

And then restart

Downgoat

btw make sure to not uninstall kernel when doing sudo apt update

Pavel

@Downgoat How did you do that

That's not normal

HyperNeutrino

hm ok i'll do that sometime thanks

Downgoat

3:17 AM

long story

HyperNeutrino

actually i'll do it now and then restart later

W: GPG error: deb.torproject.org jessie InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 74A941BA219EC810

for sudo apt update

Pavel

ಠ________ಠ

Well it looks like you have bigger problems then

HyperNeutrino

o rip

Downgoat

Feb 21 '17 at 21:12, by Downgoat

@betseg speaking of package manager, NEVER do "apt-get install". It uninstalled my kernel ._.

Pavel

2

A: GPG error, signatures public key not available TRIED A LOT

You are probably affected by bug 1263540. I suggest you try: sudo apt-get clean sudo mv /var/lib/apt/lists /var/lib/apt/lists.old mkdir -p /var/lib/apt/lists/partial Remove any 0 lenght files in /etc/apt/trusted.gpg.d/ sudo apt-get update If it doesn't work restore /var/lib/apt/lists backed u...

Heeby Jeeby Man

3:19 AM

CMC: I wrote this code trying to optimize its source for some metric. Figure out the metric.

HyperNeutrino

meh i'm probably switching computers in a few days anyway and my brother's going to use this one and my parents don't trust him with using linux so he gets to use windows :p

o ok thx

@HeebyJeebyMan most insanity induced?

Pavel

@HyperNeutrino Just install GNOME if you haven't already and stick the Windows XP theme on it.

Heeby Jeeby Man

You do not need to be able to read haskell to figure out the puzzle. In fact even if you can read haskell the source is so obfuscated you would have a pretty hard time reading it.

@HyperNeutrino No, not quite.

HyperNeutrino

@Pavel lol not going to trick anyone xd

besides idc i'm not the one using it¯\_(ツ)_/¯

Pavel

Well, when you do switch, I reccommend installing Fedora

Downgoat

3:22 AM

@HeebyJeebyMan symmetry?

Pavel

And immediatly running sudo dnf remove PackageKit.

HyperNeutrino

Ah okay. Apparently the computer already comes with Linux installed but I don't know what version.

@Pavel ok but wait why

Heeby Jeeby Man

@Downgoat Not sure what you mean by symmetry but no it is not a form of symmetry.

Pavel

Because PackageKit sometimes decides you don't need dnf and breaks it for you.

HyperNeutrino

oh ok so instead you just delete package kit :P makes sense

hm tried the steps in the askubuntu thing but it still gives the same error

Heeby Jeeby Man

3:24 AM

Hint: What the program does is relevant.

Pavel

@HyperNeutrino ¯\_(ツ)_/¯

If your home folder has it's own partition (like it should) you could also just reinstall Mint entirely.

Or install Fedora

HyperNeutrino

@HeebyJeebyMan something about substrings?

Heeby Jeeby Man

Yes it is.

HyperNeutrino

:D

optimizing for the shortest substring that shows up twice?

hm ok. again, since i'm switching computers soon, so i probably won't worry about it

and yes /home does have its own partition

Heeby Jeeby Man

@HyperNeutrino No but you are pretty close.

HyperNeutrino

3:26 AM

hm ok i'll think about this a bit more maybe

actually no i have to go sleep now because french exam tmr morning :D fun

anyway gtg o/

and thanks for linux help :D

Heeby Jeeby Man

o/

Manish Kundu

4:04 AM

Hey

Pavel

Hi

Manish Kundu

Is my challenge good enough now, or still needs changes?

MD XF

4:52 AM

@ManishKundu I recommend leaving challenges in the sandbox for at least three days, a week if you're unsure about it

New Meta Posts

5:08 AM

1

Q: Community Promotion Ads - 2018

It's almost February in 2018, which isn't supposed to be the proper time to cycle these, but for this year it'll be once again, so we'll be refreshing the Community Promotion Ads for this year now! What are Community Promotion Ads? Community Promotion Ads are community-vetted advertisements tha...

DJMcMayhem

Vote on the Community Promotion Ads for 2018!

8

Mr. Xcoder

> 2018 Community Promotion Ads for 2018

Pls edit while you still can

DJMcMayhem

Haha, whoops

@Mr.Xcoder 2018 Community 2018 Promotions 2018 ads for 2018 that will appear in the 2018 year of our lord 2018

Mr. Xcoder

If Grace would also check our feature-requests...

New Main Posts

8:30 AM

-1

Q: Radiation Detector!

A radiation-hardened program is a program where, if any character of the code is removed, the program will still function the same. For this question, we'll be writing a program that detects when it is irradiated. Write a program or function that, when any single character is removed, the result...

code-challenge radiation-hardening

Potato44

@HeebyJeebyMan Is that meant to be Wunnel code

Heeby Jeeby Man

8:54 AM

Nope

Hyper neutrino wad quite close

flawr

9:24 AM

an alternative to the default twitter ad that @GraceNote posted:

Adám

@flawr TBF, out favicon is missing a P.

flawr

@Adám it is probably too small to fit another one in

perhaps when you arrange them in a square?

PP
CG

user202729

9:58 AM

I am still trying to understand what the program does...

Adám

@user202729 What program?

user202729

HeebyJeebyMan's CMC.

Is ([]::[Char]) the same as ""?

Adám

@user202729 I think so, yes.

user202729

11:56 AM

Is there any point in voting on community ads if they already got 6 votes?

Adám

@user202729 Nice meta question.

Sanchises

1:29 PM

I just realized how cruel the Sandbox community ad is. It promotes putting bugs in a sandbox and squashing them with a hot iron.

Adám

@Sanchises I always wondered about that. How can a challenge have "bugs" anyway, and you don't "iron out bugs". You squash (sorry!) or remove bugs and iron out wrinkles.

@Mego ^ Shouldn't it say "Iron out its wrinkles." ?

Sanchises

@Adám I guess it's a joke, but I only realized that now. And regardless, I would imagine that ironing out wrinkles is hardly possible in a sandbox either (although I have never in fact tried ironing shirts - or programs - in a sandbox)

Really, a sandbox is no use to a programmer, unless it has a shell (in which case it's more likely a beach) [/noise]

Adám

@Sanchises I think sand actually would be an excellent surface on which to iron shirts, if it wasn't for the fact that it would render them dirty, thus necessitating laundering and re-ironing.

Dennis

Although ironing in a sandbox sounds like something we'd do here.

Adám

@Dennis I fix (my programs') bugs in TIO, which is a sandbox.

Mr. Xcoder

1:43 PM

ಠ_ಠ TIO is more than just a sandbox.

Sanchises

@Adám I suppose dry monodisperse sand (i.e., no dust, only large particles) could work?

mudkip201

ಠ_ಠ

Adám

@Mr.Xcoder True; TIO has multiple shells, therefore it is a beach. QED.

7

Sanchises

@Adám Also, deadfish. (and a lot of different other animals, most not dead)

AdmBorkBork

PPIT: Programming Puzzles and Ironing Tips

J. Sallé

1:45 PM

This whole conversation should be tagged as "PPIT"

Adám

@Sanchises Yes, e.g. IronPython.

Sanchises

@Adám I feel a new esolang coming up.

Adám

@Sanchises Nooo…, what have I done‽

NieDzejkob

@Sanchises but it already exists and it's not an esolang

Mr. Xcoder

@Sanchises Iron Python is not an esolang ಠ_ಠ

Sanchises

1:49 PM

@Mr.Xcoder I see. But it's nothing like ironing a shirt in a sandbox, which is what programming in this esolang should feel like.

Mr. Xcoder

Oh, Triangularity is what you are looking for, in that case :P

J. Sallé

Or perhaps Malbolge?

Adám

I'd rather have a language called Zoo. Here are the built-ins: 🐭︎🐹︎🐰︎🐯︎🦁︎🐶︎🐺︎🦊︎🐴︎🐮︎🐷︎🐻︎🐼︎🐵︎🐸︎🐲︎🦄︎🐱︎😸︎😹︎😺︎😻︎😼︎😽︎😾︎😿︎🙀‌︎🐈︎🐅︎🐆︎🐀︎🐁︎🦏︎🐘︎🐂︎🐃︎🐄︎🐎︎🦌︎🐐︎🐏︎🐑︎🐖︎🐗︎🐪︎🐫︎🦍︎🐉︎🦇︎🐍︎🐇︎🐒︎🐕︎🐩‌︎🐨︎🐿︎🦅︎🦉︎🦆︎🐓︎🐔︎🦃︎🕊︎🐣︎🐤︎🐥︎🐦︎🐧︎🐋︎🐳︎🐬︎🦈︎🐟︎🐠︎🐡︎🐙︎🦑︎🦐︎🦀︎🐚︎🐌‌︎🐢︎🦎︎🐊︎🙈︎🙉︎🙊︎🎠︎♘︎♞︎🐽︎🐾︎🎠︎🏇︎🐀︎🐃︎🐅︎🐇︎🐉︎🐍︎🐎︎🐐︎🐒︎🐓︎🐕︎🐖︎🦓︎🦒︎�‌�︎🦕︎🦖︎🦗︎🦋︎🐝︎🐞︎🐜︎🐛︎🕷︎🕸︎🦂︎🦗︎

Sanchises

I was thinking of a language which only has a flatten array command xD

J. Sallé

If you want to have that authentic ironing-a-shirt-in-a-sandbox-full-of-fire-ants-and-they're-all-trying-to-kill-yo‌u feeling, Malbolge is the way to go.

AdmBorkBork

1:53 PM

@Adám I blinked and they turned from full color to monochrome and for a second I thought there was something wrong with my monitor.

Sanchises

@J.Sallé That escalated quickly, from just some bugs to fire ants trying to kill you.

Mr. Xcoder

My analogy with Triangularity is quite good: You write an inline program of ~20 bytes, then pad it accordingly in a triangular shape for 49 bytes (Iron the shirt perfectly, no crests, no troughs)... Then you realise you have to add 2 bytes to handle an edge case... Padding makes it 71 bytes (After Ironing the shirt, you realise it's dirty)

Adám

Hm, maybe I should start calling APL's monadic ∊ "Iron".

Mr. Xcoder

@Adám Is it just my browser, or there are some boxes in the middle?

Sanchises

@Mr.Xcoder True story. I find that it's much easier to iron in a new crease than iron it out again.

Adám

1:54 PM

@Mr.Xcoder I have two substitute chars in FQ/Win10

Sanchises

@Mr.Xcoder They're not boxes! These are obviously question mark animals.

Mr. Xcoder

I see ~10 boxes, and 2 question marks :P

J. Sallé

@Sanchises have you ever read the documentation for Malbolge? The analogy will make more sense.

Mr. Xcoder

@Sanchises Adám rediscovered dinosaurs :O!

Adám

0/10 Partial support for Unicode 10.

AdmBorkBork

1:56 PM

@Adám I think you mean □/10

Sanchises

@J.Sallé I know, I was commenting on the fact that you went from ironing a few bugs to Malbolge, which is indeed like ironing fire ants which have formed a raft on the steam water reservoir.

J. Sallé

@Sanchises indeed

Sanchises

I wonder how the Unicode people feel, now that most people know them from "oh, those are the people that make emoji, right?" instead of making a standardized encoding that encompasses virtually all scripts used in the world.

Adám

@AdmBorkBork More like 🦛/10.

@Sanchises They totally did it to themselves with this nonsense.

AdmBorkBork

Huh, I copied the half height box, lol

Dennis

2:01 PM

🦛/�‌�︎

mınxomaτ

> (IN: ∞ msg/s)

Apparently, our logging server receives all messages ever.

Dennis

.oO(Why are there two replacement characters between the emojis and boxes?)

Sanchises

@mınxomaτ Or it received a message instantaneously (t=0s), if the definition 1/0=Inf is used.

That, or your server uses the rare IEEE 754 8-bit floating point representation.

Adám

An APL built-in get's its own emoji: ⍨

J. Sallé

@Adám that's so good

Sanchises

2:08 PM

1 sign bit, 2 bit exponent, 5 bit mantissa, quarter precision float. One wonders why that's never used.

Adám

@J.Sallé It's proposed for Unicode 11.

J. Sallé

@Adám here's hoping it gets accepted

AdmBorkBork

At least the new main posts poster was honest that it was a homework problem ....

Sanchises

@Adám Isn't it Unicode 10 forever now, with regular updates? Unicode 10 Creators Update...

totallyhuman

we seriously need an ad for esolangs

and the mobile app

New Main Posts

2:10 PM

-1

Q: I have zero experience coding in Python or anything else and need help with this homework problem

Create a program that reads in three separate real numbers from the user. Then, the program should ask the user to choose one of three options: (1) addition, (2) multiplication, or (3) subtraction. Depending on the option chosen, the program should print out the appropriate calculation between e...

python

user202729

@NewMainPosts Seriously, you should not post "questions" that had been closed or deleted. (unless it's unclear)

Sanchises

...Never mind, apparently ¼ precision floats exist since April 1st 2017, github.com/sdd/ieee754-rrp

2

Dennis

HQ precision should be enough for everybody.

totallyhuman

CMP: what do people want in a "need help to make a mobile app for PPCG" ad

Sanchises

@Dennis I actually quite like QQ, it's like a boolean but with error codes.

Adám

2:20 PM

APL-emoji translate table: ¨:😶; ⍥:😮; ⍤:😯; ⍣:😗

mudkip201

half-quarter-quarter precision...

why

Sanchises

@mudkip201 To save space.

mudkip201

also, I refuse to believe that that is an actual thing. "pointless numbers"

Sanchises

@mudkip201 It's a real thing. I could show you many pointless numbers, if you like!

mudkip201

...

do they actually call them that?

Sanchises

2:24 PM

@mudkip201 Sure! There's also pointless strings, pointless arrays; there are entire software packages that are completely pointless!

mudkip201

lol

Sanchises

(hint: look at the publication date of that rfc)

mudkip201

oh derp

Sanchises

The preceding messages by me were also completely pointless.

mudkip201

yes

Sanchises

2:25 PM

I'll show myself out.

mudkip201

ಠ_ಠ

flawr

CMS: Is the gradient a column or a row vector (-field)?

user202729

What is CMS? Contest Management System?

flawr

chat mini survey:)

user202729

... should it be important?

flawr

2:37 PM

I have seen different conventions, but I think only one of them is "natural" even tough it is the more cumbersome to actually use:)

user202729

Only flawr use CMS.

betseg

CMP (poll) is more popular I think

flawr

One could argue that CMS was used before CMP:)

Dennis

CMS: CMP or CMS?

flawr

CMS of course, not gonna start new things :)

betseg

2:41 PM

insert xkcd about standards

user202729

CMS often means "Community Managers" here, and "Contest Management System" exactly once by NewMainPosts.

NieDzejkob

@Dennis CMP!

flawr

@user202729 the first are CMs

user202729

Because SE chat search is case insensitive.

flawr

It is insensitive in general, constantly hurting my feelings.

user202729

2:49 PM

Does SE store old user names?

NieDzejkob

@user202729 Yes. That's how they found DPR

Erik the Outgolfer

@Dennis uh, they don't mean the same thing?

"survey" doesn't necessarily mean "poll"

user202729

What is DPR?

NieDzejkob

@user202729 Dread Pirate Roberts

Dennis

Dread Pirate Roberts

ninja'd

totallyhuman

2:52 PM

...guys get your abbreviations together

user202729

So...? I don't understand.

Erik the Outgolfer

> Ross William Ulbricht (born March 27, 1984) is an American former drug trafficker and darknet market operator, best known for creating and running the Silk Road website from 2011 until his arrest in 2013.[2] He was known under the pseudonym "Dread Pirate Roberts".

from en.wikipedia.org/wiki/Ross_Ulbricht

NieDzejkob

@user202729 the guy who made silk road. He asked on SO about connecting to tor via curl on an account with his real name, then changed his nickname to "frosty", which he used in the silk road context

flawr

@Sanchises "After ratification of this standard by the IEEE, all official communication from the Institute will in future no longer use the term "Integers". Since this set of numbers does not contain a decimal point, this dated terminology will be replaced with the term "pointless numbers"."

4

user202729

This sandbox challenge seems to get more upvotes than I expected. Any review?

Sanchises

3:07 PM

@flawr No pun intended (but not avoided either): what your point?

flawr

@Sanchises this here -> .

totallyhuman

big point

Sanchises

That's mine, actually. But I meant, why did you quote that?

NieDzejkob

@totallyhuman I've got a bigger one, here: •

flawr

@Sanchises found it hilarious :)

user202729

3:12 PM

⬤,

New Main Posts

3

Q: Diluted Integer Sums

A positive integer can be diluted by inserting a 0 between two bits in its binary expansion. This means that an n-bit number has n-1 dilutions, which are not necessarily all distinct. For example, for 12 (or 1100 in binary), the dilutions are 11000 = 24 ^ 11000 = 24 ^ 10100 = 20 ^ In ...

code-golf arithmetic number-theory binary

New Main Posts

3:38 PM

1

Q: Solve the game Hitori

Introduction Write a solver for the game Hitori using least bytes. Challenge Your task is write a solver for the game Hitori (ひとり, the word for "alone" in Japanese; The meaning of the game name is "Leave me alone"). The rules of the game is as follows: You are presented with a n-by-n grid co...

code-golf game

wizzwizz4

4:39 PM

Does anyone know where sudo apt-get install ffmpeg puts the headers?

Neil

don't you need ffmpeg-devel for the headers? (I remember needing the headers for something, but I forgot what, and how I got them...)

wizzwizz4

@Neil Thanks.

Neil

well, I could be wrong, I have a memory like a colander

wizzwizz4

Wait, no. It doesn't exist.

@Neil Any of these jog it?

launchpad.net/ubuntu/+source/ffmpeg

Weijun Zhou

For apt-get, it's ffmpeg-dev

Anonymous

4:45 PM

@Adám I didn't make the ad - I just reposted it :P

wizzwizz4

I've a time-critical application.

Weijun Zhou

ffmpeg-devel is for RPM

wizzwizz4

@WeijunZhou Doesn't work. :-(

Neil

@WeijunZhou ah, so my memory isn't a complete failure then

Anonymous

@wizzwizz4 They're split up. Try sudo apt install libavcodec-dev

wizzwizz4

4:46 PM

@Mego Ok.

Thanks.

Weijun Zhou

Then you have a lot to install ...

Good luck

Adám

@Downgoat Shouldn't the sandbox ad say "wrinkles" instead of "bugs"?

Anonymous

Just install what you need

Anonymous

Alternatively, build from source

wizzwizz4

It works!

AdmBorkBork

4:48 PM

@Adám You don't like mixing metaphors?

wizzwizz4

But now the linker's borken.

Undefined references everywhere.

Adám

@AdmBorkBork Not particularly.

AdmBorkBork

It's a perfectly cromulent phrase.

wizzwizz4

Does anyone know what this means?

> Package libavfilter was not found in the pkg-config search path.

Weijun Zhou

It means you don't have the corresponding dev package installed.

Anonymous

4:54 PM

sudo apt install libavfilter

wizzwizz4

@Mego I tried that.

Anonymous

-dev?

wizzwizz4

It compiled!

sudo apt-get install libavfilter*

I'm going to have to clean up afterwards.

Weijun Zhou

don't use asterisk like this, for god's sake

wizzwizz4

I know.

I got desperate.

Weijun Zhou

4:55 PM

You just need libavfilter-dev

NieDzejkob

gosh, you've made a mess

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Learning your strengths and weaknesses king-of-the-hill Fighters have a unique, random Strength (between 1 and 1000) When two fighters fight, the stronger one wins. Your goal is to accurately guess your fighter's Strength. Gameplay: We start by randomly ordering all 1000 fighters. Each figh...

Erik the Outgolfer

5:18 PM

any feedback for this or this?

DJMcMayhem

@NewSandboxedPosts I wonder how well a binary search would work (ignore opponents previous guesses and repeatedly cut search space in half purely based on whether you win or lose)

That kinda relies on the other bots guessing well though

I really like this challenge idea

Pavel

Does anyone know what -pedantic does for C++/G++?

betseg

$ man g++ | grep "\-pedantic$" -A28
-pedantic
Issue all the warnings demanded by strict ISO C and ISO C++; reject all programs that use forbidden
extensions, and some other programs that do not follow ISO C and ISO C++. For ISO C, follows the
version of the ISO C standard specified by any -std option used.

Valid ISO C and ISO C++ programs should compile properly with or without this option (though a rare
few require -ansi or a -std option specifying the required version of ISO C). However, without this

Weijun Zhou

Also stackoverflow.com/questions/2855121/…

Pavel

@WeijunZhou After reading that I still couldn't tell if pedantic enforced the original C++ standard or not, it seems to not.

Anonymous

5:32 PM

@Pavel Short version: it makes the compiler complain if your code isn't strictly conforming to the ISO standard (e.g. if you use compiler extensions)

Pavel

Ok. I'm currently compiling with g++ -Wall -Wextra -Werror -pedantic -std=c++17, are there any other useful flags I should enable?

betseg

you dont have to use pedantic, you can use g++ extensions

Pavel

CMP: -pedantic or no?

betseg

-pedantic if the code will be used across platforms/compilers, no if not

wizzwizz4

@Pavel -pedantic and every warning possible but if it points out a problem with my code I silently drop that flag.

Anonymous

5:40 PM

@Pavel

-pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wswitch-default -Wundef -Werror -Wno-unused

Pavel

Is -std=gnu++2a a bad idea?

betseg

are we in 202a

Pavel

@Mego ;-; that's a lot of flags

wizzwizz4

@betseg No. It's talking about 192a.

Anonymous

@Pavel Not really, but the standard is still under construction, so it's not yet stable

Weijun Zhou

5:49 PM