The Nineteenth Byte

ATaco

12:01 AM

@ZacharyT All strings are lists of characters, that's how they work internally.

It's just that a list of characters outputs like a string would.

Leaky Nun

@ZacharyT what for?

@Lembik the bounty on this question is ending in 18 hours. What to do?

Destructible Lemon

@Mendeleev you started it

Mendeleev

I miiiiight have too many turrets... :P

Destructible Lemon

nope

you have placed them too much on top

they should be in a massive array around the entrances

Mendeleev

No

The enemies can break blocks

Also, the 4 gatling turrets and two repair turrets on the entrances are more than enough

DJMcMayhem

12:14 AM

@Mendeleev What game is that?

Mendeleev

@DJMcMayhem Dig or Die. It's like Terraria or Starbound, but more combat focused and with tower defense elements

It's really fun

I got it for \$3, I think the price went up to $10 though

Basic premise is that your AI spaceship crash landed on an alien planet with aggressive monsters

Progression works like this: Every time you kill a member of a new species, they attack you at night

Night is hellish

Also, this is actually not enough turrets. I need more regen ones

Zachary T

@LeakyNun I want this to actually map over to each char in the argument, rather than the whole string.

Hey, @Sean, you know Perl6?

Destructible Lemon

@Mendeleev you way over did it with the ceiling turrets, you probably need to move them to the sides

Leaky Nun

@ZacharyT be more specific

Mendeleev

@DestructibleLemon Nah, the sides are fine. I usually stay on the ceiling. There's flying monsters that try to break the turrets and succeed if I don't have enough. The ones that can't fly get hit by the ones in the entrances

The underground turrets repair other turrets

Destructible Lemon

12:25 AM

weird

Zachary T

Is there an atom that does this?
'012' => ['0','1','2']

Leaky Nun

@ZacharyT I mean, be more specific about the function you are mapping

because ['0','1','2'] is how the string is internally represented

if you don't trust me, add a "python string rep" atom to the end

totallyhuman

You can usually apply list functions on strings on Python

Zachary T

Nvm, I got it, I just didn't need the string list separator!

“0A”iÐ€ instead of “0“A”iÐ€

Leaky Nun

you don't tell me what you're using it for and say "nvm"?

Mendeleev

12:34 AM

@DestructibleLemon @DJMcMayhem About to stream a typical night in Dig or Die

totallyhuman

Well, nvm is probably valid jelly code

Zachary T

8

Q: Generate a US License Plate

Given one of the following as input: AK,AS,AZ,CA,CT,DC,FL,GA,IL,IN,IA,KS,KY,LA,MD,MI,MN,MS,NV,NH,NJ,NM,NY,NC,ND,MP,OH,OK,PA,PR,RI,SC,TN,TX,UT,VT,VA,WA,WI (with quotes) "AK","AS","AZ","CA","CT","DC","FL","GA","IL","IN","IA","KS","KY","LA","MD","MI","MN","MS","NV","NH","NJ","NM","NY","NC","ND",...

Leaky Nun

I'm not asking what you want to do (well, to turn a string into a list of characters) or the challenge you're trying to solve (because that isn't really useful data), but the specific function that you are applying to each character in the strings...

it's either too little data or too much data

Zachary T

Nah, I'll just do it in some other golfing language.

Mendeleev

@DestructibleLemon youtube.com/watch?v=y9TOiIrzHWw

Adám

12:41 AM

@all I'll appreciate any feedback on QuadR and QuadS my two new golfing languages.

Zachary T

Are all your golfing langs going to be APL names?

Adám

@ZacharyT Probably.

DJMcMayhem

@Mendeleev How much is it on steam?

Mendeleev

@DJMcMayhem $10

There's a coop multiplayer mode too

Here comes the "fun" part, if you're watching the stream

Zachary T

If I ever have enough programming knowledge, I'll probably stop making crappy golfing langs and make an APL-style-language,

Mendeleev

12:53 AM

Is Jelly "APL style"?

Just asking

Leaky Nun

@Mendeleev well, Jelly is based on J, so...

Mendeleev

OK

Zachary T

Array-oriented, yes. Symbols, yes. Any other way possible, no.

DJMcMayhem

@Mendeleev absolutely

Mendeleev

@DJMcMayhem OK, was just confused

Destructible Lemon

12:54 AM

@ZacharyT hah everyone disagrees with you

ETHproductions

I just spent an hour making a long piece of golfed code look neat and tidy, and fixed a few bugs along the way. I'm at about a week-long high right now

Zachary T

Yeah, there's multiple "APL styles". "APL isn't a golfing language"

Mendeleev

everything just crashed

brb rebootinhg

HyperNeutrino

CMC: Find an MD5 checksum whose MD5 checksum is itself.

Destructible Lemon

@HyperNeutrino what if it doesn't exist

HyperNeutrino

12:59 AM

Then everyone loses.

totallyhuman

1:15 AM

perfect end

:o i just looked stuff up and randomly found dennis on SO

Mendeleev

@HyperNeutrino md5 has no fixed point

totallyhuman

Here, have a gold badge. — Dennis Dec 3 '15 at 22:08

Mendeleev

@HyperNeutrino By the way, I (and everyone else here) just lost The Game.

HyperNeutrino

@Mendeleev No, I didn't.

;P

Mendeleev

well, you just did

HyperNeutrino

1:19 AM

nope

neutrinos don't have "thoughts"

Mendeleev

heh

HyperNeutrino

@Mendeleev aw :( is sad

totallyhuman

oh noes dennis used windows in 2011

HyperNeutrino

CMC: Find the longest loop of MD5 checksums checksumming in a loop.

@totallyhuman *le gasp*

Destructible Lemon

@Mendeleev how do you know

Mendeleev

1:22 AM

@DestructibleLemon google

2

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Destructible Lemon

@Mendeleev no

HyperNeutrino

please no

Destructible Lemon

1:46 AM

hey guys, we have officially done the first compiler in our compiler chain!

HyperNeutrino

yay! :D

Destructible Lemon

Github Compiler Chain

github.com/Compiler-Chain

Ataco made his better compiler, though it was very much longer

HyperNeutrino

Is it a compiler or an interpreter chain?

Destructible Lemon

Compiler

plus one interpreter

HyperNeutrino

ah k

Destructible Lemon

1:49 AM

we would invite you if you wanted to join

HyperNeutrino

I don't think I can devote the time to it, unfortunately.

Destructible Lemon

that's ok

you can check back in when it gets easier. We're one level above bf at the moment

also the resulting bf programs are gonna end up massive

ATaco

The first compiler is 161kb.

HyperNeutrino

lol wut

Mendeleev

@DestructibleLemon Do you want to do a multiplayer game of Dig or Die?

Destructible Lemon

1:53 AM

@HyperNeutrino he made a very inefficient compiler and then used it to compile itself

@Mendeleev schooool

Mendeleev

@DestructibleLemon lol wut

Destructible Lemon

also 10$

Mendeleev

it's late june

what school

Destructible Lemon

the school before the holidays start

Mendeleev

where do you live

Destructible Lemon

1:54 AM

not telling

Mendeleev

oh

Zachary T

Country, not address, obviously

Destructible Lemon

nah jk I have probably mentioned it in chat before tbh

Mendeleev

@ZacharyT yeah this

Zachary T

@DestructibleLemon So, bootstrapping?

Destructible Lemon

1:55 AM

yes. but of course he made a compiler in another language first

Zachary T

Of course ...

ATaco

Bootstrapping is the name of the game.

Destructible Lemon

otherwise it would be as impossible as literally lifting yourself by your bootstraps

4

ok who starred the fact that it is late june

that doesn't seem like a poignant fact

ATaco

It's a pain to write a compiler for a langauge in brainfuck, so write the compiler that compiles to brainfuck in a higher language, then write that compiler in its own language, which then is compiled to brainfuck.

Destructible Lemon

I actually wrote a compiler in bf

so ya know

HyperNeutrino

1:57 AM

I wrote a compiler in BF for Tautology.

Zachary T

Me, realizing the two messages link together to form a statement.

HyperNeutrino

+.

Destructible Lemon

if you wanted, you could probably take my autogenerator and tweak it slightly for each of the things

@HyperNeutrino wrong

ATaco

@HyperNeutrino That looks like an interpreter.

HyperNeutrino

close enough :P (funny how i was being picky about that just earlier)

Zachary T

2:01 AM

Is this decently golfed? codegolf.stackexchange.com/a/128731/55550

Destructible Lemon

@ZacharyT comment posted

musicman523

@ZacharyT You shouldn't need a function since you're using input() and print(). And there has to be a better way than that dictionary...

Zachary T

Thanks, I had them as if statements before (disgusting)

New Sandboxed Posts

2:34 AM

0

A: Sandbox for Proposed Challenges

Every Nth Char in Source Outputs N code-challenge source-layout Heavily inspired by Hello, World! (Every other character) Write a program that outputs 1. When the first, third, fifth, etc. chars are removed, it outputs 2. When all chars where their (1-based) index in the source, mod N, are not...

Zachary T

Hey, what are the kick times? As in, what are the durations of each successive kick from a SE chatroom? Or is there no set order?

Dennis

→ 19 messages moved to Trash

@ZacharyT 1, 5, 30 minutes. There are other repercussions though.

Zachary T

Are there times past that>

Dennis

The third kick raises a moderator flag. Whoever handles it will decide if further action is required.

Zachary T

Okay, so no more punny (please don't kick) business. And what are those "repercussions">

Destructible Lemon

2:40 AM

silently getting room creation banned

Dennis

Aside from the mod flag, that.

Destructible Lemon

I'm not sure why that needs to be by default

and why it is silent

Zachary T

I'm assuming those privileges have no decent chance of returning?

Destructible Lemon

actually I got room creation banned, but Dennis helpfully removed the ban

Zachary T

I'm assuming that's why you were so quick to respond>

(I can't seem to type a question mark today)

HyperNeutrino

3:09 AM

I hope you do know thta you can edit your messages...

totallyhuman

It's 11:11 yay

People went a little crazy in this challenge

Also the chat room was also hyper

New Main Posts

0

Q: Is multithreading in python a myth?

I am new to multithreaded code in python. In my current knowledge i know that multiple threads can be spawned within the system concurrently but 2 different threads can not access or modify the same resource at the same time. I have even tried many things like creating many threads and putting in...

python multi-threading

Leaky Nun

3:32 AM

TIL empty statement in Python is syntax error

(semicolons in succession)

HyperNeutrino

@totallyhuman I heard (half of) my name

Anonymous

4:01 AM

→ 3 messages moved to Trash

HyperNeutrino

Does anyone know of a framework that I could use for rich text + image collaborative editing? Preferably one that doesn't require me to keep my computer open all the time.

HyperNeutrino

4:30 AM

This is literally on the help page >.<

Anonymous

@HyperNeutrino What are you talking about?

HyperNeutrino

@Mego codegolf.stackexchange.com/help/privileges/moderator-tools

Anonymous

Is that added by the design userscript, or did SE actually do that?

Anonymous

Oh dear, SE actually did that.

Destructible Lemon

freehand cred

HyperNeutrino

4:33 AM

I think SE actually did that

It's still there when I turn the script off :P

lol about 34% of our traffic is from being referred from SO

Anonymous

I posted this a few months ago. That was not the solution I was hoping for.

HyperNeutrino

lol

Destructible Lemon

@Mego I only just realised that was there too...

Anonymous

That userscript that adds the tools button to the omnibar is really useful. The guy who wrote it must be really smart and successful.

HyperNeutrino

xD

ETHproductions

4:39 AM

Trying to put ideas in our heads, are you? :P

Destructible Lemon

Idea for a challenge, given a number, ecks dee-ify the string "XD" some amount of time

what I mean:

1: ecks dee

2: ee see kay es space dee ee ee

3 ee ee space es ee ee space kay ay wai space ee es space es pee ay see ee space dee ee ee space ee ee space ee ee

etc.

Anonymous

Idea for a challenge: something that isn't obnoxious

4

Destructible Lemon

idea for a chat post: not starbait

ETHproductions

@DestructibleLemon I can see that quickly spiraling out of control with the single y in 2, followed by the single w in 3

Destructible Lemon

yup. it would be very long outputs

ETHproductions

4:44 AM

But I don't really see a fixed point where you can just say "oh, I only need to support these letters"

Obviously you won't need q or x or z, but you will need most of the rest

HyperNeutrino

pastebin.com/weP48LPX

doublew?

double yoo

double + ew

wouldn't f be ef?

4:46 AM

@DestructibleLemon That's more of what I was thinking

HyperNeutrino

pastebin.com/JX5a7pHv

Destructible Lemon

also q should be kyoo

you should be yoo

but idk, doesn't matter too much

ETHproductions

So let's see... with e, these letters are self-supporting: bdflmnpstvz

And with s, c is supported

But if you require any of aghijkoqruwxy then you require a ton of other characters

HyperNeutrino

yay I made a reference implementation

tio.run/…

ETHproductions

abcdehiloswuy- for starters, assuming - is "dash"

@HyperNeutrino what about -? :P

HyperNeutrino

4:55 AM

tio.run/…

you saw nothing

:P

also lol w becomes over 128KiB after 10 cycles.

ETHproductions

Also z gives dash

HyperNeutrino

oh wait I forgot to define z

tio.run/##RVDLbsMgEDyHr9gbWCqRkktbS/…

ETHproductions

@HyperNeutrino e might be the only character that doesn't

ATaco

jee

HyperNeutrino

yeah, e gets exponentially larger by *2 each time

ATaco

4:58 AM

Oh gee I wouldn't have guessed using j...

ETHproductions

All of -abcdehilopsuwy and space seem to fall into the fixed point of that set

Leaving fgjkmnqrtvxz as the outsiders

HyperNeutrino

https://tio.run/##vVJBjtswDLzvK6YnJ9t6sd3eCvQlQVDQMh0plkVHlJO4n0/pON0t@oACJqihqeGQ4jgXL@ntdnOesuIHdq97POPbGz6j0pEcg68u0kAlSKoHyj1amZrI9WmSwvCkvtDBgjFSrjUcEkbOjlNZAQ0GlVILDenwfi9yV@omk@u5IIeD/0CkhXPQHmOcdCVxMgyEIaQ/AeMMYpTRyuMXZ4EkRrkIis/M6GTK6MKZreoVymdO4KUKUrBEJ1GShYewniKr1sWTJZ0miopDZjIVa@w0sX60T9bYPDQSQTMaq6VmrdnydR2O5ml2HjwzjpbTm3EEDzAR4k07o59FQBmsKAYXdF5o1tEukF2vuFCw7h7TUpOW@X1Mjbm1/3V8//x2Bgqm1Nr0nWS@55fg@v8t2005zndZjDGM/JD7d7iE2HL1omMMZbN9eupsEW3nmpZw/Y4K1ctRQtrs7ku6k9xu@u3e3jijR0i47u3OsryZLj9DGqc7yZhDKtCHr@rq@evrA3Qb3d5unmOUL7hIju2n3w

ETHproductions

oh my

s/period/dot

HyperNeutrino

sure

https://tio.run/##vVJBjtswDLzvK@aWpIWTRdrTAn1JEBS0TEeKZckR6STu51M63u4WfUABC9LQFDkczTCpz2n/eDhPRfADh9cjvuDbHl@xkoEcg@8uUk8acqp6Kh2aPNaRq8uYleFJvNLJgjFSqSScEgYujpMugHqDQqmBhHT6uBe51aou5DpWlHDyn4hEuQTpMMRRliIu9z2hD@lPoMkKidYbv7hk5MTQW4b6wow2jwVtuLK1vEP4ygk8t0AKluhyzMnCfVhOkUUq9WRJl5Gi4FSYjMISu4wsn7OTTTX1dY6gCbX1EluNrflrW5xtp8l58MQ4W05niyO4h5HI3rRhdFPOoAIWqMEZXecyi64zZNcJbhRsunepxKgV/tCotm2Zf9Hun9/OgGJMjUnvcuFnvgbX/W/abixxetJiDGHgd7p/hzXEhldbGWLQ9eblpTUXmuHqhnB/wwqr7TmHtD48HXrIpVl3m6O9cUGHkHA/2p3ZuYVuP0MaxmeRoYSkaNeyeTy86iBvu50V0K3orNDdzunEW/PVruTcy27//XWnnqvZITZdUl/Vk/Jv

Destructible Lemon

> hashtag

it is a hash you peasant

HyperNeutrino

5:04 AM

no 0800fc577294c34e0b28ad2839435945 is a hash

https://tio.run/##vVLRbtswDHzvV9xbkg0uiu5twL4kCAZapmPFsuiQchLv51M67tpiHzBAhHQURR5PHOfSSX6930NHaviF/csB3/DjFd@xsZECg28h0UAlSq4G0h6NTHXi6jxJYXRknXtSIq0sHjNG1sC5rIAGh0a5gcV8/HiUuC1VrRR6LtB47D4RWWGN1mNMk61JggwDYYj5r6ORAktL4T@sAsmMchWUTpnRyqRo44W95A3GF87gpQRy9MAgSbK7h7ieEptVpSMPOk@UDEdlcgqr7zyxfTZO3tU81JJAM2qvZW6N27JanHyjOXTgmXHykN6NE3iAc5DOpWH0swhIwYbicEGXJcuq6QI59IYrRW/uXSlzZsofEtW@re2v0v1zHRwUTLlx5YMoP@JLDP1/Zh0mTfODFWOMI7@z/eouMTW8ebYxxbLdPT21PoA@a3VDuP3EBpvnk8S83T@Gcy/abPvdwX9Y0SNm3A7@ZhlapevvmMfpkWTUmAvarX05L2h3v@/fAA

ATaco

> hash

It's a pound you swine.

HyperNeutrino

https://tio.run/##vVLRbtswDHzvVxywhyQrXAzd24B9SRAMtEzHimXRIeUk3s9ndNy1xT5ggAjpKIo8njjOpZP8er@HjtTwE/tvB3zF91c8Y2MjBQbfQqKBSpRcDaQ9GpnqxNV5ksK4dlT4wlqVjquOU6pmmaor5VIVqQK5IxZ/khJpZfGYMbIG9usHoMGhUW5gMR/fsyZuS1UrhZ4LNB67D0RWWKP1GNNka5Igw0AYYv7raKTAElmH36wCyYxyFZROmdHKpGjjhb3kDebkM3gpgRw9MEiS7O4hrqfEZt4cedB5omQ4KnvLuvrOE9uHMuRdzUMtCTSj9lrm1rgtq8XJN5pDB54ZJw/p3TiBBzgH6VwaRj@LgBRsKA4XdFmyrKIvkENvuFL05t6UMmem/C5R7dva/irdP9fBQcGUG1c@iPIjvsTQ/2fWYdI0P1gxxjjyG9vP7hJTw5sXG1Ms293TU@sT6sNYN4TbD2yweTlJzNv9Y3r3os223x38hxU9Ysbt4G@WqVa6/op5nB5JRo25oN3ap/OCdvf7l9j0fwA

Destructible Lemon

@ATaco *Poundsign, you scoundrel

HyperNeutrino

I like this better though

https://tio.run/##vVJbbuMwDPzvKQbYjyRbuCjavwX2JEFQ0DIdK3o5opTEvXxKx@kDe4AFTIhDUeRwzHEqQ4ov16sZKAv@Yvu8w2@8vuARKxnJMPhiPAUqNsUmUHboUm09N8eaCiPW0HJuxO6jXnhPd3/kbDiWBVBQKBQ7iI37r7ee@9K0mYzjgmz3wzciKZytOIy@ylLEpBAIwcbPQJcKxJMMeOeckCKjnBPKkJnRp5rR2xNrywuETxzBcwtEq4km@RQ1HOzieRZpykCadKzkBfvMpBSW2LGyfM9POtUU2uRBE1rtJWqd2vz1OOhBkxnAE@OgKU6NPThAOaRBpWG4KSVQBguKwhmd5iqLtDNk4wRnsjrcXSlRZpm/JGr1WMZfpPvn2igoqLFT5U3KfMsv1rj/zNrU7KcbK8ZoR76z/Rku1ne8epLR27LePDz0uoe6cm1HuPzBCqunQ7Jxvb3t6Dblbu02O/3DGQ424rLTN/PuZjq/2TjWW5Ex21jQr@WHP6PN9frLdu4D

Mendeleev

5:33 AM

what why kick

HyperNeutrino

strange, i guessed that you were kicked because i saw something that seemed to imply kick. i think it was because of hash with no context

Alex K Chen

How to work with numbers greater than uint_64 in C ?

Dennis

@Mendeleev I can read MD5.

Mendeleev

@Dennis oh?

Dennis

@totallyhuman en.wikipedia.org/wiki/Memoization

Alex K Chen

5:36 AM

@Dennis Is there a way to ~~freeze~~ ice-proof a chat room ? (Also, do you know C or python ?)

Mendeleev

I put it through all the unhashing tools I could find online, no result

HyperNeutrino

@AlexKChen There is a way to unfreeze a room (mods only), but not prevent it. And I know Dennis knows Python.

Dennis

@Mendeleev Just google it.

Anonymous

@AlexKChen I'm not Dennis, but a room won't be frozen if it isn't inactive. I also happen to know C and Python.

Alex K Chen

Why he isn't replying O_O ? You must be a sock of the menace :P

Dennis

5:38 AM

@AlexKChen I k ow both, but I'm going to bed. Sorry.

Mendeleev

@Dennis Possible to thaw the OPPCGMCS related rooms?

Alex K Chen

@Mego Come here

HyperNeutrino

md5lab.com

Mendeleev

@Dennis ok. I thought it was obscure enough

HyperNeutrino

MD5 is weak IIRC.

Mendeleev

5:39 AM

@HyperNeutrino It is

Destructible Lemon

I searched it and I didn't find it but I am not on google...

Anonymous

The kick happened, now let's all move on to more productive topics.

HyperNeutrino

but... this is tnb... xD but yeah

Mendeleev

@Mego Yeah, let's not talk about kicking. Anyone here like bans? /s

HyperNeutrino

ಠ_ಠ

Mendeleev

5:46 AM

trivia: a . is called a full stop

also, anyone who can figure out what this is gets a cookie:

Destructible Lemon

trivia: a . is a .

Mendeleev

RzTTlsSIjUoftMZUqbGpYWyUUS7p/gMWddbF56277ZkjO8Nx8BgOw2vbuyOpd8DctJRTHZUaxkQX
APsgrsc=

Key: hello

Destructible Lemon

@Mendeleev a ciphered string?

Mendeleev

post the string and you get a cookie

Destructible Lemon

RzTTlsSIjUoftMZUqbGpYWyUUS7p/gMWddbF56277ZkjO8Nx8BgOw2vbuyOpd8DctJRTHZUaxkQX
APsgrsc=

Key: hello

done

Mendeleev

5:47 AM

not what I meant

Anonymous

→ 3 messages moved to Trash

Mendeleev

Alex K Chen

Sorry for the ASCII art @Mego

Anonymous

→ 15 messages moved to Trash

Mendeleev

"ASCII"

HyperNeutrino

5:50 AM

@Mendeleev oh haha very funny >.< XD

Mendeleev

@HyperNeutrino what? I did what I said I would do

HyperNeutrino

lol

Alex K Chen

@Mendeleev I runned it under 64base decoder, and then tried Vignere, but it didnt' work.

Mendeleev

huh?

HyperNeutrino

gasp how were you not affected by my old account's deletion?

Mendeleev

5:51 AM

@AlexKChen Not Vignere

Alex K Chen

Playfair ?

Mendeleev

@HyperNeutrino Didn't you get it restored?

@AlexKChen No

HyperNeutrino

Yes, but not everyone else's rep. Votes are lost.

Mendeleev

Hint: It was relatively recently banned for SSL

HyperNeutrino

But somehow you don't have the user removed mark.

Mendeleev

5:51 AM

@HyperNeutrino I guess you never voted on my posts

Alex K Chen

@Mendeleev Then I dunno.

HyperNeutrino

Hm. That seems unlikely but maybe.

Mendeleev

Other hint: aircrack

but you have the key, so you don't need aircrack

Yet another hint: I was asking about it recently

HyperNeutrino

but we don't know what to do with key

Mendeleev

decrypt with it

HyperNeutrino

5:54 AM

>.<

TIL you can rename self to be this in python

Anonymous

@HyperNeutrino Yep, the name self isn't special. Only the fact that it is the first parameter is special. You can name it whatever you want, but self is the standard.

HyperNeutrino

yup. i realized sometime earlier today "wait self isn't a keyword so it's probably not special" lol

anyway i should go to sleep now

o/

Mendeleev

Anyway, it's RC4

Anonymous

@Mendeleev banana

Mendeleev

6:10 AM

@Mego Yay!! My implementation worked!!!!!

Yes, I'm excited

now time to rewrite it from ruby to C++

u.dk0.us/rc4.rb

RC4 is a very simple cipher, and afaik if you send short messages, skip the initial part of the keystream, and use keys hashed with nonces, it's very secure

Anonymous

6:30 AM

AES isn't much more complicated, and is secure for any length of message if implemented and used correctly (i.e. not using ECB mode, and using appropriate IVs and/or nonces)

Mendeleev

I decided to start with something as simple as possible while still being reasonably secure

Will probably do AES next

idea: pad the data to 512 byte blocks, use a randomized 16 byte nonce tacked onto the beginning of the output stream (when performing operation, append it to the key and use the resulting hash as a key) and also skip the first 4KB of the keystream

How much would those increase security?

Also do diffie hellman for establishing keys

@DestructibleLemon please say anyway

Anonymous

@DestructibleLemon Please avoid deleting your messages, especially several in a row. It disrupts the flow of conversation. Instead, please think before you hit send.

Destructible Lemon

ok

Alex K Chen

6:47 AM

@DestructibleLemon Please stop. It's getting disruptive, and agianst chattiquete.

Mendeleev

says the ascii art person

Destructible Lemon

are you serious @AlexKChen

ninja'd by mendeleev

Mendeleev

ninja'd

owait

Alex K Chen

I just posted 3 ASCII arts.

Mendeleev

double ninja'd?

Alex K Chen

6:49 AM

And you deleted >7 messages

Mendeleev

@AlexKChen Three messages.

Alex K Chen

@Mendeleev Definately not. Atleast 4

Mendeleev

@AlexKChen "Definitely"

Alex K Chen

Oh shit I counted it twice. Yeah, 3 message.

Qwerp-Derp

7:03 AM

Is there a specific name for a method that's part of a class, which is defined outside the class?

So something like bar() in foo.bar()

JS has the feature of allowing you to add functions to builtin classes without inheritance, which is nice, but I don't know what that's called

Is it called a "prototype function"?

ATaco

Ah yes, Array.prototype.letsmakeanewfunc=

Qwerp-Derp

@ATaco That's a really cool feature, it's not in other languages though

What's that called?

ATaco

I have no idea.

But lua has it too, almost.

Anonymous

Be Nice, people.

6

Qwerp-Derp

@Mego ??? What's the message for? What happened?

Anonymous

7:16 AM

@Qwerp-Derp Scroll up

Qwerp-Derp

Also @Mego do you have any idea as to what I'm referring to in my question above

Anonymous

@Qwerp-Derp In prototype-based languages like JS, it's called "using the language like it's intended". In other languages, it's called stuff like "mixin methods".

Anonymous

And in languages without dynamic dispatch, it's called "impossible" and "sorcery"

Qwerp-Derp

So to make a function like [...].average in Ruby, I have to do something like this, apparently:

module Average
  def average
    sum = self.reduce |a, b| a + b
    items = self.length

    sum / items
  end
end

class Array
  include Average
end

Anonymous

Oh, I remember the other thing they're called: extension methods (primarily by C#/VB)

Mayube

7:28 AM

@Mego Adding a new method to an existing class?

Qwerp-Derp

Ruby is cool :) It seems like a better whitespace language than Python so far

New Main Posts

2

Q: The best base is 10... Let's reach it!

Input: A positive integer n consisting of digits in the range 0-9. Challenge: If d is the highest digit in the integer, assume the base of the number is d+1. E.g. if the integer is 1256 then you shall assume it's in base-7, if it's 10110 then you shall assume it's base-2 (binary), and if it's ...

code-golf number base-conversion

Jim

@Adám Regarding my sandboxed question, I think "letter" is less ambiguous than "character". So I would use the title "Swap letter and digit runs" instead

Adám

7:49 AM

@Jim Good call. where the input string ends with a sequence of letters → a run of

@Jim I'd want a walked-through example: uV5Pt3I0 → uV 5 Pt 3 I 0 → 5 uV 3 Pt 0 I → 5uV3Pt0I

Jim

@Adám Edited that.

@Adám Okay, I will add one

Done

Adám

@Jim I made every other space double, to show the groupings. Alternatively, you can use parens.

Mendeleev

I have a book "Introduction to Algorithms" that's partially written by Ron Rivest. It has a detailed explanation of RSA.

I think the explanation is trustworthy ;)

Lembik

8:08 AM

hi @LeakyNun

New Main Posts

0

Q: Find the highest digit

Surprisingly we haven't had a simple "find the highest digit" challenge yet, but I think that's a little too trivial. Given input of a non-negative integer, return the highest unique (ie not repeated) digit found in the integer. If there are no unique digits, your program can do anything (undefi...

code-golf number integer

Qwerp-Derp

=begin
  Mixin function for swapping items in arrays:

     [1, 2, 3].swap 0, 2
  => [3, 2, 1]
=end
module Swap
  def swap first, second
    self[first], self[second] = self[second], self[first]
    return self
  end
end

class Array
  include Swap
end

=begin
  Generates all permutations of an array:

     permute [1, 2, 3]
  => [[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]
=end
def permute array
  if array.length == 1
    return [array]
  else
    new_arrs = []

    [*0..array.length - 1].each do |a|

I feel quite proud of myself: I made a permute function in Ruby, and it's my first day learning Ruby!

I don't think this is idiomatic Ruby code, but eh.

Jim

8:24 AM

@Adám I used parentheses, and it's indeed more clear

1

A: Sandbox for Proposed Challenges

Swap letter and digit runs Given an input string containing only alphanumeric characters and starting with a letter, swap each letter run with the digit run which follows. A run is a sequence of consecutive letters or digits. Note that in the case where the input string ends with a run of lette...

Adám

@Jim I like it.

Jim

@Adám I will wait a few hours in case someone comes up with other suggestions, and then post it

Dada

@Jim By "a few hours" I hope you mean at least 39 ?

Jim

@Dada Why 39?

Dada

just because in 39 hours it will have been in the sansbox for 2 days, which is, in my humble opinion, the minimum amount of time a challenge should stay in the sandbox

(plus, when there are flows in a challenge on main that hasn't been sandboxed long enough, people (including me) get annoyed)

Jim

8:31 AM

@Dada Okay, I will

Adám

@Jim I usually sandbox for at least a week. What's the hurry?

Jim

@Adám Not especially in a hurry, I had just no idea how long it should stay there. That's my first sandboxed challenge after all.

Dada

Good decision :) By the way, here is the relevant meta post

Jim

@Dada Thanks for the link