The Nineteenth Byte

3:00 AM

And for languages like C, I might even have to tune the compiler flags to the architecture.

I hear one of the advantages of Gentoo is that building from source on the machine that will use the code is faster, but I don't actually know if compilation on different machines differs in any way other than arch.

user202729

Thanks. Do we have meta consensus? If not it would be good to post it somewhere on the meta.

Dennis

A meta consensus for what?

user202729

Looks like yes.

HyperNeutrino

how do I use media writer

Pavel

3:04 AM

@HyperNeutrino Launch media writer, plug in usb, follow directions on screen

It'll autodetect your flash drive

user202729

Wait...

> If the author of the challenge is unable to completely describe the testing environment, then they should take sole responsibility for testing the submissions on their own machine.

Dennis

@Pavel You can compile the code anywhere, but you'll have to use the appropriate compiler flags to make gcc (or whatever) take full advantage of everything your CPU has to offer. For the current machine, a simple -march=native takes care of that. The resulting executable might not work on other computers or if you switch CPUs.

HyperNeutrino

(as in how do I launch it)

(what's the correct thing to download lol)

Pavel

@Dennis So if you're building for your current machine, -march=native -o3 will emit the fastest executable?

user202729

-O3, not -o3.

Dennis

3:06 AM

No, that will create a file called 3.

And -Ofast or even -O2 may be faster than -O3.

user202729

I think everything >= -O2 is similar.

@user202729 that implies "describe the testing environment or test the submissions", while the actual consensus is "describe and test".

Dennis

In my experience, -O3 can be a lot slower than -O2, especially on my laptop.

Pavel

@HyperNeutrino github.com/MartinBriza/MediaWriter/releases For your current os. On Linux, that would require flatpack. If you have Linux and don't have Flatpack, just burn the correct iso for fedora without media writer.

HyperNeutrino

oh ok thanks

Pavel

@Dennis So what does -Ofast do? Default to -O2 or does it try to figure out which one is best?

user202729

3:09 AM

... I don't really care about fastest code, for most of the competitive programming problems I had solved, just using the correct algorithm suffices.

Dennis

   -Ofast
       Disregard strict standards compliance.  -Ofast enables all -O3 optimizations.
       It also enables optimizations that are not valid for all standard-compliant
       programs.  It turns on -ffast-math and the Fortran-specific -fno-protect-parens
       and -fstack-arrays.

Christopher 2EZ 4RTZ

Hello!

I just realized @Dennis you have a littler over 100 times my reputation :P

HyperNeutrino

still not sure how to get mediawriter to work :/

Pavel

@HyperNeutrino Well, good thing it's completely optional

Christopher 2EZ 4RTZ

hyper you need to have audio recording software so you can record your mic on thursday

HyperNeutrino

3:13 AM

ok

@Christopher2EZ4RTZ probably audacity ¯\_(ツ)_/¯ but yeah i'm setting up fedora for the computer i'm switching to so i'll figure it out tmr or thursday

Christopher 2EZ 4RTZ

Sweet thanks

user202729

Why? PPCG podcast?

HyperNeutrino

@Pavel should i use dd then or smth else?

Pavel

@HyperNeutrino dd or if you want whatever graphical tool comes with mint

HyperNeutrino

hm ok

there's this

Christopher 2EZ 4RTZ

3:16 AM

@user202729 bi-weekly podcast

HyperNeutrino

(i've been scammed that's for windows)

Pavel

@HyperNeutrino I prefer UNetbootin: unetbootin.github.io

HyperNeutrino

oh that thing.. i think that's what my friend used when helping me install mint on this computer lol. thanks

does unetbootin support fedora27?

Pavel

Should

HyperNeutrino

it has up to 26 i think?

Dennis

3:19 AM

Seriously, sudo dd if=<iso file> of=<device file> bs=4M conv=fsync, and that's it. Just triple-check that /dev/sdX is actually your flash drive.

HyperNeutrino

oh

Pavel

Or that. dd scares me though.

HyperNeutrino

hm

Christopher 2EZ 4RTZ

He is Dennis not Downgoat (i think?)

HyperNeutrino

my flash drive is /media/hyper_neutrino/UUI does that sound right

Pavel

3:20 AM

No

HyperNeutrino

ok

Pavel

There's a device file for it

It's probably, but not certaintly, /dev/sdb

Dennis

No, you need to use the device file. What does mount | grep /media/hyper_neutrino/UUI say?

HyperNeutrino

/dev/sdb1

Pavel

Well there you go

HyperNeutrino

3:21 AM

ok so yeah that makes more sense

thanks :D

Dennis

Then /dev/sdb (not /dev/sdb1) is your device file.

Christopher 2EZ 4RTZ

i feel like this can end badly

HyperNeutrino

it's fine dennis is here [:p]

Christopher 2EZ 4RTZ

i am confused @HyperNeutrino what are you doing again?

HyperNeutrino

hm alright

user202729

3:22 AM

@Christopher2EZ4RTZ Install Linux.

Pavel

@Christopher2EZ4RTZ That's because it can and I've nuked my hard drive on two seperate occasions by running sudo dd.

Dennis

Mind that all content of the flash drive will get erased.

user202729

Is it possible to see people's past user name? Mods or normal users?

Dennis

We can.

Pavel

The description for dd says "Copy and convert a file". In practice, it's one of A) Render your system unusable, B) Burn an iso to a flash drive.

Christopher 2EZ 4RTZ

3:23 AM

I have been changing back to my original name

HyperNeutrino

that's fine I just erased everything on it anyway when I installed Linux Mint iso onto it

now that I think of it I should've done this using Windows because I know I can use that utility thingy (forget its name)

Pavel

Media Writer

Christopher 2EZ 4RTZ

Yeah why would you ever use linux to install linux when you can use windows to install linux

HyperNeutrino

lol

Dennis

@Pavel It's also a great way of making backups of entire partitions or even drives, reading a part from a file (way more efficient than head+tail), or making a sparse copy of a file.

HyperNeutrino

3:26 AM

well i ran the command and so far nothing bad has happened

but nothing at all is happening.?

Dennis

It's happening.

HyperNeutrino

uh my computer is now like 80 times slower

Pavel

@Dennis There's a flag that enables a progress bar, I forgot what it is

Dennis

sudo killall -USR1 dd from another terminal window will show a progress report.

Christopher 2EZ 4RTZ

why would killall show progress bar??

Dennis

3:27 AM

Because SIGUSR1 isn't actually a kill signal. Most signals aren't.

HyperNeutrino

huh that did nothing

(then again i opened tty1 so that might not work)

Dennis

You have to check the original window.

wrong window

HyperNeutrino

still did nothing.?

Dennis

There may be a delay. Just wait and let it finish.

Christopher 2EZ 4RTZ

We just saw dennis do something wrong? I am going to record this moment for posterity

HyperNeutrino

3:29 AM

okay

Dennis

If your USB is as slow as you say it is, the entire ISO may take some time.

HyperNeutrino

hm okay. about how long, or do you not really know approx how long

Dennis

That depends entirely on your USB port and flash drive.

HyperNeutrino

ok

Christopher 2EZ 4RTZ

I am going to go to bed guys. TTYl o/

HyperNeutrino

3:31 AM

o/

I just did the killall command with chrome as a test and chrome died :/

user202729

Probably different commands handle different flags differently.

Dennis

@Christopher2EZ4RTZ chat.stackexchange.com/…

HyperNeutrino

probably

Pavel

You can also run dd and tack bs=1024k status=progress as arguments onto the end

Christopher 2EZ 4RTZ

Well i was wrong

Pavel

3:32 AM

Too late now though

You could restart I suppose

HyperNeutrino

i'll probably just wait :/

Dennis

@HyperNeutrino What SIGUSR1 and SIGUSR2 do is entirely up to the application. If it doesn't assign a special purpose to them, it will probably die.

HyperNeutrino

oh okay :/ lol

user202729

What's wrong window?

Christopher 2EZ 4RTZ

Trying to find peoples chat profiles :P

HyperNeutrino

3:35 AM

well I just used ps -ef | grep dd to find the PID and killed it with USR1 and it's still not doing anything :/ lol

Christopher 2EZ 4RTZ

Oh so on Thursday I am hosting a PPCG Bi-Weekly podcast from 9 to 10PM EST,

@HyperNeutrino It may bork things but you may be able to just shut down your computer :/

No idea if it will screw up the flash-drive

HyperNeutrino

uh well i entered the wrong number and /usr/bin/fish crashed

:/ i'm smart

pavel was right about dd :p

Christopher 2EZ 4RTZ

I would advise you just reboot to windows

a lot safer

user202729

@Christopher2EZ4RTZ chrome OS?

HyperNeutrino

yeah

Christopher 2EZ 4RTZ

3:38 AM

@user202729 wait what?

@HyperNeutrino are you screwing with your school chromebook again??

HyperNeutrino

[again...?] no

i got new computer

i'll just boot that computer into windows and do it there :p

Pavel

I'd get a new computer in the next month, but I'm currently saving up for Mathematica.

Christopher 2EZ 4RTZ

Nice!

@Pavel don't you have Mathematica?

HyperNeutrino

well I unplugged and replugged my USB and its name and contents are different for no reason :/

Pavel

@Christopher2EZ4RTZ The license is only for one computer and I transferred it like a dozen times and they got tired of my bullshit.

Also, you don't get upgrades,

Plus, it's for educational use only, and I'd rather have a personal license.

Christopher 2EZ 4RTZ

3:42 AM

Ahhh

So much money tho

TNB has been my home for about a year now. I have loved almost every second of it. Thanks for making it a great place guys!

Destructible Lemon

I was thinking about maybe making a koth which is basically that maze koth i failed to publish but without info weirdness

Christopher 2EZ 4RTZ

@DestructibleLemon what was your original name?

Destructible Lemon

username or maze koth thing?

Christopher 2EZ 4RTZ

username

Pavel

@Christopher2EZ4RTZ $235, I get two licenses and upgrades for a year.

Destructible Lemon

3:46 AM

Destructible Watermelon

Christopher 2EZ 4RTZ

Confusing i see

HyperNeutrino

CMP: What was your first ever SE username?

Christopher 2EZ 4RTZ

@Pavel ಠ__ಠ that is expensive

HyperNeutrino

@DestructibleLemon Oh I even remember your old profile pic :p

Christopher 2EZ 4RTZ

@HyperNeutrino Cis112233 iirc or Christopher

Pavel

3:46 AM

Or, $155 for one license.

user202729

@HyperNeutrino user202729.

HyperNeutrino

@Christopher2EZ4RTZ that name sounds familiar... is that your khanacademy name as well?

Pavel

@Christopher2EZ4RTZ Not really. Certaintly not when compared to geting a laptop.

HyperNeutrino

(BTW default names don't count though I think you choose your name upon account creation anyway)

Christopher 2EZ 4RTZ

@HyperNeutrino yes...

Pavel

3:47 AM

I've always been Pavel

Christopher 2EZ 4RTZ

How did you know that hyper?

Pavel

Well, actually I was Phoenix once

HyperNeutrino

because Newline

Christopher 2EZ 4RTZ

ah

Newline is art

Almost as great as PAIN-Flak

HyperNeutrino

lol

Pavel

3:48 AM

Not even

Christopher 2EZ 4RTZ

that is the only way to type PAIN-Flak that i will accept

It actually hurts my eyes to read that :|

HyperNeutrino

ew this new computer's keyboard bothers me

Christopher 2EZ 4RTZ

Ohh ic

@HyperNeutrino get a mechanical keyboard

tape to laptop

HyperNeutrino

the power button is the rightmost button on the top row so the home button is not aligned with the numpad [all keyboards i've used so far that have numpad and home set up this way all have it lined up that way]

Christopher 2EZ 4RTZ

ewww

Destructible Lemon

3:51 AM

how come no-one made a lang called REAL yet

HyperNeutrino

@Christopher2EZ4RTZ i used to have mechanical keyboard but i never used it and now i want one and we already got rid of it [i think donated to thing]

Christopher 2EZ 4RTZ

:|

why would you EVER not use a mechanical keyboard

Anonymous

@HyperNeutrino Mego. Don't fix what ain't broken.

HyperNeutrino

:D :P

Christopher 2EZ 4RTZ

@Mego well in here it is Mego

check mate

HyperNeutrino

3:52 AM

@Christopher2EZ4RTZ it was a while ago pls no hate

Anonymous

@Christopher2EZ4RTZ Sure, but originally it wasn't in italics ;P

Christopher 2EZ 4RTZ

@HyperNeutrino judges in the background

@Mego my point :P

Destructible Lemon

ok so for a maze koth thingy what are some good move/ply options each turn

Christopher 2EZ 4RTZ

@DestructibleLemon you haven't posted since june?!??

Destructible Lemon

yeah...

Christopher 2EZ 4RTZ

3:54 AM

geez man

Destructible Lemon

i think i posted more recently on puzzling

Christopher 2EZ 4RTZ

oic

user202729

I have a challenge idea; Given a (chat) user ID, scrape all chat message transcript in all rooms of chat stackexchange to determine all usernames of that user.

HyperNeutrino

(of course only getting usernames from when that user became active in chat)

user202729

Is that too much work?

HyperNeutrino

3:55 AM

QFT is a thing I think you'll be fine :p

I don't think I was ever active in chat as "Alex L." but I can't remember

user202729

(you cannot use an account on stack exchange)

HyperNeutrino

also 7Zip is bad at counting time :p

user202729

No, I mean because there are too many rooms and too many users it would take a lot of times to run the program.

HyperNeutrino

oh hm true I see.

DJMcMayhem

@Dennis Hmm, that's a really good question. I hadn't thought about it. I guess in theory, I don't mind solutions not being deterministic, but something like while !neighbored: flop(random) seems really cheap

So I'm not entirely sure

Pavel

3:57 AM

@HyperNeutrino Are you burning an iso by extracting it in 7zip?

Christopher

Mayo on taco

Sep 21 '17 at 21:31, 2 minutes total – 28 messages, 6 users, 20 stars

Bookmarked Sep 21 '17 at 21:35 by Christopher

quartata

Hey all, this has been up for a really long time

Pavel

That doesn't always work.

Christopher

The most important conversation in TNB history ^^^

HyperNeutrino

well universal USB installer is doing that

quartata

3:57 AM

Spam flag, no DVs

user202729

... in practice, random are implemented with random number generators...

DJMcMayhem

@quartata Charcoal?

Anonymous

@quartata Yep, I saw it and reported it in Charcoal

quartata

@DJMcMayhem we don't scan site metas, it was manually reported

Anonymous

Wonder why Smokey didn't pick it up

user202729

3:58 AM

facepalm Why does no one delete it?

Anonymous

Oh, that's why

DJMcMayhem

Ah

Should that be changed?

user202729

Uh wait...... should I delete it or flag it?

HyperNeutrino

@user202729 because then the user gets away with it. it's more severe if it's autodeleted by flags

Anonymous

@user202729 Flag it. That comes with harsher consequences for the spammer.

HyperNeutrino

3:58 AM

27

A: How do we handle spam posts?

Flag, don't vote to delete If three people vote to delete it before six spam flags get through, then the post will have to be undeleted before it can continue to be flagged. If six flags get through, that post is deleted and locked by Community (and gets its content shoved into the revision hist...

DJMcMayhem

ninja'd

Christopher

I flagged it since i couldn't VTD :P

Zacharý

You know you're a nerd when you get excited that your friend learned an array programming language.

HyperNeutrino

@DJMcMayhem I have advantage of user:me :p

o wait it's top for search:spam posts anyway

Christopher

@Zacharý I am so proud of him :)

Zacharý

4:00 AM

Wasn't APL though

user202729

What is an array programming language? ...

HyperNeutrino

uh...7Zip has been on 00:00:00 remaining time for like 3 minutes by now

and there are 14 errors of 37 files :/

Anonymous

@user202729 A programming language that operates on arrays

Anonymous

It's exactly what it says on the tin :P

Christopher

Don't you know? The final 1 percent of loading bars is actually around 75% of the work being done

Pavel

4:01 AM

@Zacharý Which one was it

@HyperNeutrino Because 7zip isn't an iso burning tool

HyperNeutrino

again, universal usb installer is using 7zip

Christopher

If it is java I take back everything i said that was positive about that thing

Zacharý

Octave or R I think. Basically the non-APL (J included) one (that's how I categorize array languages, APL-esque and others)

Anonymous

They could say "the connection is probably lost," but it's more fun to do naive time-averaging to give you hope that if you wait around for 1,163 hours, it will finally finish.

HyperNeutrino

lol

Christopher

4:02 AM

@Mego nice onebox

Pavel

@HyperNeutrino Get exe from github.com/MartinBriza/MediaWriter/releases

HyperNeutrino

ok

Pavel

It'll automatically downlaod the correct ISO, format your drive, and install everything.

HyperNeutrino

ok so boot menu doesn't even recognize my USB as a live USB after UUI finished :/ fail

anyway waiting for windows to boot so brb in like 10 minutes (/s more like 2)

Christopher

@HyperNeutrino format the USB

user202729

4:03 AM

@HyperNeutrino ... it's midnight for you already...

quartata

@user202729 please do not use delete votes on spam ever

oh sorry you were already pinged

Zacharý

Problem = Windows

user202729

I know, I just forgot it. At least it didn't cause any bad consequences this time.

Christopher

Uhh so in the US Flu is going around that is actually killing people, be careful guys!

Anonymous

@HyperNeutrino Use rufus

user202729

4:04 AM

I turn off sound notification most of the time, so no problem. Probably just a (1*).

Anonymous

@Christopher That's been happening for months. Every year, the flu kills people - old people and children that don't get vaccinated

Pavel

@Mego Fedora Media Writer for Fedora

HyperNeutrino

@user202729 (11:05 PM)

Pavel

It's remarkably not awful as far as live usb creators go

user202729

@HyperNeutrino Must be 12, or my computer clock setting is wrong.

No it isn't.

HyperNeutrino

4:06 AM

are you going by EDT

user202729

... what's that?

HyperNeutrino

timezone?

Christopher

@Mego this is people in hospitals dying though

user202729

... I don't know about daylight saving time.

or how it works.

ETHproductions

@HyperNeutrino I don't think EDT is being used anywhere at the moment

HyperNeutrino

4:07 AM

o ok. well it's EST rn because DST is off so I'm UTC-5 I think

EST is -4 (? idk)

@ETHproductions yeah that's why i asked

ETHproductions

wait, maybe in South America?

Anonymous

@Pavel Oh right, Linux. Try UNetbootin

Christopher

Ask dennis about SA time

ETHproductions

@HyperNeutrino EST = UTC-5, EDT = UTC-4

user202729

Ok I don't know how it work. Every day lasts 24 hours in my timezone.

Anonymous

4:08 AM

@Christopher Yeah, one of the strains this year is especially deadly. It's a big problem because the standard flu vaccine (trivariant) doesn't include the vaccine for the deadly strain. The vaccine variant that includes that vaccine isn't as widely-available.

HyperNeutrino

@user202729 well yeah globally that has to be true... a day is always 24 hours... but like DST just moves an hour from march to october to realign time during the summer

Christopher

@Mego I have not gotten a flu shot in years, never needed to b/c I just don't get sick

HyperNeutrino

@Mego tried already but it doesn't appear to support Fedora 27

i'm just going to go with fedoramediawriter :P

officialaimm

I have cold each year that usually goes for long duration, like 2+ weeks. Never remember having influenza or sth like that. However, I tend to use the term flu to denote common cold at times!

HyperNeutrino

I get a cold almost every year that lasts like 4-6 weeks but it's never anything severe just kinda annoying. sometimes I forget about it

Christopher

4:12 AM

I googled Tim Allen, got on the sidebar photos of Paul Allen and Tim Allen, Then it shows quotes from Tim Allen and the shows he was in, links Tim Allen's website and gives the bio for Paul Alen. GG

user202729

Google bots are bad?

officialaimm

@Hyperneutrino Yea, I feel ya.

Dennis

@DJMcMayhem If it's allowed: tio.run/##HYxBCsMgEEXXzSlmGYtZ2OxMcxJxUVCJYGZkKsSc3mo3/…

Christopher

Today on TNB: We go WEBMD

HyperNeutrino

@DJMcMayhem Just require that the program must have a 100% chance of terminating without failure assuming cosmic rays don't screw up the hard drive or something like that

inconsistent kerning between a and l in the picture on this wiki page bother anyone else too?

Christopher

4:19 AM

reddit.com/r/softwaregore/comments/7u796j/…

3

user202729

@Christopher Why don't people star this and instead star...

@Christopher this?

HyperNeutrino

because reddit

user202729

Jan 24 at 17:23, by HyperNeutrino

whi is my message starred and not the original message... oh well starring is just like voting on main

HyperNeutrino

[i wanted to ask mego to trash it because first of all weird star and second of all typo]

Christopher

It usually takes me until the end of the day to get my daily dose of stars :P

Anyways gtg bye o/

user202729

4:26 AM

55 mins ago, by Christopher 2EZ 4RTZ

I am going to go to bed guys. TTYl o/

HyperNeutrino

o/

(going to bed != leaving TNB and o/ != bye and "later" is very loosely defined) (:P)

when I close a tab in Microsoft edge and then Ctrl-T again, it preserves the omnibox content, which is bad for me because I frequently do "Ctrl-T G Space Ctrl-W" to check caps lock :p

mudkip201

lol

Pavel

@HyperNeutrino If you want KDE on Fedora, select spins when starting FMW. You might have figured that out already.

HyperNeutrino

Oh okay. No, I didn't figure that out, and it's already writing to the flash disk, so idk should I go back :/

Pavel

You'll get gnome by default. You could always put KDE on later, but it'll be easier to just install the KDE spin.

HyperNeutrino

4:32 AM

oh well I restarted it :/ time to wait another half hour

anyway I gtg now cya o/

Pavel

@HyperNeutrino You found the KDE Plasma desktop option?

Cya

user202729

4:46 AM

Some jelly please?

Pavel

5:05 AM

CMS (Chat mini survey): Does anyone actually use MATLAB, or do people stick with Octave if they need it?

DJMcMayhem

5:15 AM

@Pavel I know @LuisMendo does

Can't really speak for anyone else though

user202729

@user202729 First attempt failed.

user202729

6:33 AM

@user202729 Done.

Sherlock9

7:10 AM

Hi everyone

My friend's website got defaced by an irate customer: ingkarsa.com (text is in Indonesian)

The thing is, he can't figure out the hacker did it, and how to fix it

Though we think it's something with CloudFlare

user202729

... do you think PPCG users are hackers?

Also the hackers probably had patched the bug already...

Sherlock9

I don't

I do think you're better than my friend and I at backend

And that you all know more about website programming in general

So I hoped you guys might have some ideas

Anonymous

@Sherlock9 SQLi? XSS? Cookie theft?

user202729

There is nothing apart from the html on the site...

@user202729 I meant "being good at hacking and similar things"

Anonymous

@user202729 Right now, there isn't. Presumably there was before (because "customer")

user202729

7:17 AM

I don't know what is there before it was hacked, so I'm not sure...

Anonymous

With logs, I might be able to help, but my consultation is not free :P

Sherlock9

Wait, I'm getting news that he's found a thing

The hacker replaced my friend's index.php with their own

The next question is how

Anonymous

> index.php

Anonymous

Found the problem :P

user202729

Store something there? We need the original website to know...

Anonymous

7:20 AM

In order to replace that page, they'd need access to the server's files. That could be done in many ways: hijacking FTP access, exploiting a vulnerability in the website to overwrite it, exploiting a vulnerability in the server software, etc.

Sherlock9

Is the FTP port open on AWS?

Accidentally a word

user202729

I don't think it's FTP... but I don't know.

Anonymous

Dunno. It could be - it depends on how the AWS setup is done to upload files

Anonymous

Like I said - I'd need logs to know more

Sherlock9

And compensation :D

Anonymous

7:22 AM

Naturally :)

user202729

Someone close NMP please?

Why do we have this page?

Sherlock9

NMP = Not My Problem?

Anonymous

@user202729 Because we used to be a beta, and I guess that just doesn't get removed

user202729

NewMainPosts.

New Main Posts

-2

Q: Implement john cena in diffrent languages?

John cena is a command https://github.com/gauthamzz/John-Cena which is implemented in diffrent languages. It print /n infinite number of times. So you can't see anything. Any uncommon language implementation is appreciated.