The Nineteenth Byte

And another reminder if you're using re.sub, be sure to follow pattern, replacement, string syntax, often make errors on this and spend a lot of useless time on debugging

New Posts

8:21 AM

0

Q: If 2 singular values of the matrix Σ are excluded, how many entries are freed from memory?

In an SVD problem where A = UΣVt. Since the matrix Σ is an rxr diagonal matrix, to save space it was saved as a vector. Let M = 100, n =40 and r = 8. If 2 singular values of the matrix Σ are excluded, how many entries are freed from memory?

StackMeter

8:50 AM

oh I figured it out

A username

9:03 AM

First time beating 05AB1E!

ophact

Wow, forgot about the mini-golf. Today, right? Hopefully didn't miss it

A username

I don't think you missed ti

I will be asleeping tho'

ophact

This is the one time I can actually be on for the whole time, hopefully

rak1507

same

StackMeter

Is there a "sort an array" popularity challenge?

ophact

9:08 AM

I'm not sure, actually.

My first APL answer!

clap

@ophact thx

Nice!

nice @Wasif

9:21 AM

thx y'all

still learning it

StackMeter

Just had an idea for a new question

Wasif

@StackMeter go sandbox it

StackMeter

it's about boxes

ophact

about boxes of sand? That sounds fun, thanks for a new idea for a question.

StackMeter

wait I meant ASCII boxes

A username

9:44 AM

My 117th Vyxal answer, because that's somehow special :p

ophact

117! That's more answers than my total count.

A username

Ooh, I'm at 299 right now

#300 overall is actually special'

Also I have been doing way too much of this over the past week

ophact

Yeah, there was a time when the frontpage had 14 instances of "answered <number> hours ago by A username"

A username

Lol

Wasif

@ophact mostly it was deadfish~ answer flood

@Ausername wow nice

I think I have crossed 50?

IDK

A username

9:50 AM

Idk but the site's down for me

Wasif

me too

it shows "Connection failure"

A username

Ye

@ophact @StackMeter Is it down for you two as well?

ophact

No, still works

Wasif

now it gives 503

ophact

"Service Unavailable"

Wasif

9:52 AM

@ophact reload and tell here

ophact

No problems.

A username

"Varnish cache server"?

ophact

Maybe you're in the same area, that's why

Wasif

@ophact No, @AUsername is in New zealand and I am in Bangladesh

A username

I'm in New Zealand :P

Wasif

9:54 AM

oo sorry

A username

Its fine

Still down

ophact

Browser?

I'm on edge

A username

Firefox 89

Wasif

Chrome 83

ophact

Hmm, that is really strange.

Wasif

9:55 AM

Maybe maintenance is going on?

But they likely announce it before

Whole SE network is down

A username

Now it's just back to 'connection failure'.

Wasif

For me it is still 503

A username

Oh well I can do stuff with the tabs I had loaded before it went down :p

ophact

Not for me. I have tried SO, Superuser, CGCC and Music and none of them errors.

Wasif

yeah on Firefox it is connection failure

but on chrome it is 503 still

A username

9:57 AM

It was the 503 but now it's back to connection error :p

ophact

Works on firefox for me as well. Maybe the entire Eastern part of the world has a problem with the internet?

(cause I'm in Europe)

A username

Sometimes it's 'I/O error'.

ophact

Could you share a screenshot?

A username

Sorry imgur's broken as well

Wasif

Imgur is down too :-(

A username

9:59 AM

But now it says

Fastly error: unknown domain: stackoverflow.com.

Details: cache-akl10327-AKL

ophact

Everything is down?

Try the following URLs: google.com, yahoo.com, youtube.com

A username

Just the entire SO network

Wasif

they work fine

ophact

is imgur owned by SE?

Wasif

@ophact nope

maybe i.stack.imgur.com is down

A username

10:01 AM

imgur itself is down with 503

Wasif

but I am wondering how chat is surviving

ophact

You opened TNB before the servers went down for you.

A username

Because they haven't mantained it in years, which also means it's become completely independent

Wasif

don't reload TNB

A username

@ophact If that were the case, message posting would work

Wasif

10:02 AM

it will be down as well

A username

@Wasif It's fine'

ophact

Does it still show 503?

Wasif

oo then it is a mystery

ophact

What device are you on

Wasif

@ophact yep

A username

10:02 AM

@ophact Macbook Air

Wasif

Ubuntu 20.04 LTS 64-bit

ophact

Try restarting

Wasif

I don't think restarting would work

Its probably an internet problem

ophact

Sorry, can't help you then if it's to do with your configuration

A username

Hold on, I'll try connecting thru a European VPN.

Wasif

10:04 AM

Because this is too much for a coincidence to have this same problem on two different continents and also at the same time

ophact

~~Don't start sentences with "because"~~

Wasif

@ophact why

A username

UK VPN doesn't work :P

Wasif

I am now panicking

A username

Look on the bright side - at least chat survived

ophact

10:06 AM

It's not the end of the world if CGCC is down [even though I probably check codegolf.stackexchange.com every 5 minutes]

A username

On the other hand, we can't ask SO because SO is dead.

ophact

You can ask reddit if that wors

*works

Wasif

Let's check other sites if it works

looks like quora is down for me

ophact

"How can we sleep while our beds are burning" this song has been stuck in my head for some reason. It makes sense in this situation because for some time now CGCC was my "bed", where I went when I was bored, but it's burning (at least for you)

A username

I'm going to check out other chatrooms, hold on

Wasif

10:08 AM

Reddit is down too :-(

ophact

Can you google anything?

Or bing or duckduckgo

Wasif

@ophact yeah

both bing, duckduckgo work

youtube works too

ophact

OK, since it's mostly the forum sites, my guess is that there's a problem with whatever forum software they are all using, either that or Django?

A username

CSS on the site is dead

Wasif

Is it some kind of conspiracy?

ophact

10:10 AM

Conspiracy?

Wasif

sorry dunno what is the right word to use for that

ophact

What were you trying to say?

A username

Quora is dead

Might be some logic bomb attack

@StackMeter Is code golf down for you?

Wasif

@ophact all forum sites going dead at the same time is too much for being a coincidence

A username

27 secs ago, by A username

Might be some logic bomb attack

Wasif

10:11 AM

I think chat is down for the most other users

A username

Maybe

ophact

Yes, only us and StackMeter, who left and rejoined and is keeping quiet

A username

Or can't talk;'

ophact

What does reddit use on backend?

Maybe Django or Flask or whatever trending framework (React, Angular?) is down

@Ausername mentioned that it said "Varnish server" so maybe that

A username

All CSS on chat is dead

Wasif

10:13 AM

@ophact dunno

A username

Except here because it's cached

Wasif

but obviously big sites don't use flask

A username

HTML is being served, but now I have to find my way to some active room without css.

ophact

SocketIO? I guess a lot of forums that have realtime features use SocketIO

downdetector.com/status/stackexchange

Says reports of outages spiked recently

A username

This isn't helpful

ophact

10:17 AM

743

Q: Which tools and technologies are used to build the Stack Exchange Network?

What tools and technologies are used to build the Stack Exchange Network? See also: Which tools and technologies are used to build Data Explorer? Return to FAQ index

support faq stack-exchange technology

Maybe .NET as a lot of websites use it

If one of you has .NET, try creating a new app with .NET to see if it's working

A username

I'm using the wayback machine to read that

ophact

To read which one?

A username

The post you linke'

ophact

So web.archive.org is working for you

Wasif

There was no planned maintainence since few months

A username

10:20 AM

Scratch is down

Wasif

Is TIO working

@ophact yes

Should be

TIO is fine for me

Yep it is

Then DjangoBB is probably down

A username

10:21 AM

It's all Dennis's code, it

's fine'

Wasif

yeah phpBB is working

A username

Thankfully Github isn't, so I can go have a look at it

Wasif

I checked some phpBB forums

ophact

SE is closed-source, too bad

A username

Github's CSS is dead

ophact

10:22 AM

Now try SE again just to check

Wasif

@ophact still down

CSS for github and other sites are still working fine because it is cached i think

our avatars are visible

which source do they come from

A username

DjangoBB hasn't been mantained for a year

Must be some logic bomb

ophact

@Wasif i.stack.imgur.com/518sy.png?s=48&g=1

Wasif

So i.stack.imgur.com is up

A username

IT'S BACK!!!

ophact

10:24 AM

What if you enter this chat room again from a different tab?

Oh wait

Wasif

@Ausername no not for me

A username

Or was :(

For about a second

ophact

"The short-lived happiness"

A username

I managed to load your profile then it crashed again

Wasif

@Ausername its a sign of goodness

ophact

10:25 AM

>
What if you enter this chat room again from a different tab?

Wasif

Maybe everything will be OK soon

Neil

@cairdcoinheringaahing Charcoal, 14 bytes: ＮθＩ×θＥ⪪…·¹θ²Πι

Wasif

@ophact it loads

Neil

phew it's not just me

ophact

Looks like we're up again

Wasif

10:26 AM

no not yet

A username

That works fine, except a lot of PFPs aren't loading now

ophact

Well Neil's in the UK, so he probably just went to have lunch for a while

Wasif

@Ausername all PFPs are loading fine

A username

Yeah but as soon as I opened it in another tab it didn't.

ophact

hmm

Neil

10:28 AM

@Ausername this link happened to work for me, but then it went dead again

A username

AND IT"S BACK

ophact

For real this time, right?

A username

And it's not

ophact

Wow

Wasif

up and down

but I am not able to catch when it's up

A username

10:28 AM

I'm just trying to cache pages when that happens so I have something to do

ophact

Well I'm eating lunch right now so won't be available for 20-25 more minutes, but I'll be back to help you guys in a while

Wasif

@ophact bye see ya

Neil

I managed to load the questions page at least

Wasif

@Neil how

is any new question posted

Neil

luck, apparently

no, there was that closed question from 2 hours ago, which is the only once since the APL train question

A username

10:31 AM

I think I might be able to post an answer when its done

Would NMP work? I'm not sure if it's connecting to the websocket?

Wasif

@Ausername i don't think so

bots are likely to fail

A username

I managed to get an answer but it captcha'd me and broke again :(

Wasif

I have bad luck

A username

GOT AN ANSWER!

Wasif

Haven't managed to get to a single page yet

@Ausername you posted an answer in this time??

A username

10:37 AM

I occasionally get a few seconds where it works

I just typed it up, then managed to get it posted :p

I think it's actually working but this message might jinx it

Wasif

you are really lucky

A username

Nope I jinxed it'

Wasif

I think rest of the users are ok

they might be offline for some reason right now

StackMeter

Is the site down?

can't get access

Wasif

@StackMeter yeah

StackMeter

10:42 AM

k

Wasif

did you get access to chat

A username

Ye

StackMeter

when is it coming back

Wasif

ninja'd

StackMeter

@Wasif I always have chat open

Wasif

10:42 AM

I see

StackMeter

you don't?

Wasif

@StackMeter is entire SE network, Imgur, Quora and reddit down for you?

(to check if entire SE is down, just visit a few sites there(

StackMeter

@Wasif yep

did someone parse HTML with RegEx

A username

Scratch is down 2

@StackMeter We're blaming DjangoBB

StackMeter

ok

Wasif

10:45 AM

funny thing is djangobb.org itself works

ngn

is there a neat way in python to do x.index(y) but appending y to x if it's not already present?

StackMeter

it's back

A username

I got a notification but I can't tell what it is :p

Wasif

@StackMeter nope

StackMeter

rip

A username

10:55 AM

It's up now

Wasif

@Ausername nope

@ngn something like this?

x=[1,2,3,4]
y=5
try:
  x.index(y)
except ValueError:
  x.append(y)
print(x)

A username

I'm managing to get online

Wasif

@Ausername are you still online now?

A username

Yes it's working

ngn

@Wasif thanks. i was hoping to avoid dealing with the error and avoid searching the list twice, but there doesn't seem to be a way around it

ophact

10:58 AM

Hello again, is it up?

A username

@ophact Welcome bacK!

Sorta

Wasif

@ophact welcome back but not up for me

ophact

Sorta? Does that mean that you are able to access SE like 50% of the time?

A username

I think it's finally working but I don't want to jinx it

Wasif

@ngn yeah I think so

StackMeter

10:59 AM

@Wasif I'd refresh

Wasif

I have to go for tution now, will be back again in a few hours

bye

@StackMeter I have refreshed for like thousand times

ophact

Ok bye

A username

I have to go for sleep soon, bye. Also, #300 finished.

ophact

Bye

caird coinheringaahing

13

Q: Stack Exchange seems to be down

Meta Stack Exchange and many other sites in the network seem to be down, what's happening? (In case you were wondering: this question was posted via the officially deprecated Stack Exchange iOS app.)

discussion downtime

The app works completely fine, ironically :P

Shaggy

11:03 AM

Fastly killed the internet, the jerks.

ophact

what's fastly?

The wiki page even mentions their outage

caird coinheringaahing

google.co.uk/amp/s/techcrunch.com/2021/06/08/…

lyxal

@ophact edited in about a minute or so ago

ophact

If Fastly goes down again, not sure if we can still hold the minigolf

lyxal

See now the real question is how tf did they manage to fix their servers if they couldn't access Stack Overflow?

7

ophact

11:13 AM

These stackoverflow jokes never get old ;)

Now I have a problem with accessing SE

lyxal

11:40 AM

Hey so uh

Epic escalator time-lapse compilation

►

You should totally watch it

Very high quality

Wasif

hello again

oo eveything is back!!!

caird coinheringaahing

There should really be a backup in place. Let's be honest, how on earth are the staff at Fastly meant to fix anything if Stackoverflow is down?! :-D — berry120 42 mins ago

Oh thanks crappy internet :/

@NewPosts STATUS

New Posts

RUNNING: [1] 1 1

[08:21:26] request: chat.stackexchange.com/chats/240/messages/new
[09:24:19] 202-question-2140
[11:44:28] 200-questions-newest

caird coinheringaahing

I think you missed one @NewPosts (cc @RedwolfPrograms):

0

Q: Polyglot Interpreters

RULES: Choose any number of languages and call this set L. Write a program so that running it in any language in L produces an interpreter for another language in L. NOTE: Each language in L must have EXACTLY one interpreter for it. This is to prevent, for example, Nothing or Text being part of ...

polyglot

ophact

It's almost instant

not instant

caird coinheringaahing

11:50 AM

That's been up for 5 minutes, NP is practically instant

lyxal

Chances are that the internet outage probably screwed over the bot

caird coinheringaahing

Its status report says everything's running fine tho

ophact

@NewPosts status

@NewPosts STATUS

caird coinheringaahing

ROs and mods only

ophact

oh

caird coinheringaahing

11:55 AM

@NewPosts RRRRRRRRREEEEEEEEEEEEEEEEEEEEDDDDDDDDDDDDDDDDWWWWWWWWWWWWWWWWOOOOOOOOOOOLLLLLLLLLLLLLLLLFFFFFFFFFF

New Posts

RUNNING: [1] 1 1

[11:50:11] request: chat.stackexchange.com/messages/ack
[11:53:00] request: chat.stackexchange.com/messages/ack
[11:53:04] request: chat.stackexchange.com/messages/ack

caird coinheringaahing

Basically, if it has [1] 1 1, it's running fine according to Redwolf

Neil

@lyxal ...that escalated quickly?

5

New Posts

12:42 PM

0

Q: Reorder it up and down

Given infinite different integers, order them into a sequence \$a_1, a_2, a_3, ...\$ such that \$a_i>a_{i+1}\$ iff \$i\$ is even(or odd, as long as it's constant for all possible inputs and all \$i\$). In other word, make the sequence go alternately up and down (or down first, as long as it's con...

code-golf sequence

hyper-neutrino

12:59 PM

i'm not sure this is solvable

actually nvm with a bit of lookahead you should be able to prevent getting stuck i think

caird coinheringaahing

I think, for an arbitrary sequence, it is, as you can just form a bijection to ℤ, and order based on the provided example for ℤ

hyper-neutrino

the thing is since the sequence is infinite you can't really do this offline

but i think i thought of a solution so nvm

rak1507

1:15 PM

@lyxal nice reflection

lyxal

@rak1507 l'thank

Newly Featured Posts

28

Q: Shortest Code to randomly place points and connect them

The Task This is quite a simple coding task, all your program has to do is place a point on a canvas (or your alternative in another coding language) and connect it to all the dots already placed. Your program must take in one input, the number of dots that should be placed, and output some sor...

code-golf geometry graphical-output random

165

Q: Don't google "google"

We all know that if you google the word "google" it will break the internet. Your task is to create a function that accepts one string and returns its length, in the fewest possible Unicode characters. However, if the given string is google (lowercase), it will cause an error. For example, g('...

code-golf string

ophact

1:48 PM

Are we allowed to begin posting drafts? I already placed one in "BMG drafts"

hyper-neutrino

we have 2 hours, so yes, we should probably get working on that

if there are even enough people - this room seems kind of dead at the moment

ophact

at the moment

rak1507

might be bc of the outage earlier

ophact

Is it possible to run a SEDE query to see the location with the highest concentration of CGCC users?

rak1507

@ophact that's easy, my basement

unless one of the constraints is that they are still alive

hyper-neutrino

1:51 PM

Draft collection for the Biweekly Mini Golf is happening right now.

ophact

The minigolf is at 6:00 (my time), so that means people in the East are asleep, people in the Americas are at work or getting ready for work (or sleeping), that means only Europe and Africa have applicaple hours

ophact

2:07 PM

The average user in TNB has posted 1500 messages (or so.)

hyper-neutrino

@cairdcoinheringaahing is it possible to just sub eval and use like 8 major versions of python?

oh sorry for the ping I mistook that for a bot post >_<

hyper-neutrino

2:38 PM

@cairdcoinheringaahing it is actually a lowercase L

@Ausername ^

i checked this at one point

just assumed caird was right instead of rechecking :(