The Nineteenth Byte

ASCII-only

12:49 AM

hmm what would be the best way in perl to golf (1,5,10,50,100,500,1000)

Riker

1:38 AM

I love how the top 2 [git] SO questions are "how do I burn this thing to the ground" and "how do I fix git's messes"

Pavel

@ASCII-only relevant oeis

ASCII-only

2:58 AM

@Pavel :| not golfy

ASCII-only

3:18 AM

the best i can do is equally ungolfy

ASCII-only

3:30 AM

side note: i'm probably doing this the worst way possible but i'm too bad at perl to figure out another way

New Main Posts

4:04 AM

0

Q: unRSA: solve the private key

Given positive integer n and e, knowing that e<n and that n is the product of two different primes, find such a positive integer d smaller than n that, for each integer m, (me)d ≡ m (mod n). Your program should handle n up to 24096 in reasonable space, but not necessary reasonable time. You can...

New Main Posts

4:21 AM

0

Q: Ten-pin bowling score - World Bowling edition

World Bowling scoring Many people have gone to their local bowling center to play a few games of bowling, and many people continue to struggle to calculate their scores. World Bowling has introduced a simplified scoring system in order to attract more people to the sport. This scoring system is...

code-golf number arithmetic

Lembik

7:37 AM

Hi. I want to make a challenge for code which opens a new window which you can move around using keys

is that too hard?

I mean using the keyboard

New Sandboxed Posts

9:07 AM

0

A: Sandbox for Proposed Challenges

Note: I published this question on another site a while ago and could use some guidance on how to make it suitable for SE. I've seen very similar challenges here that have slightly different input/output conditions, I hope that's okay. Things I could use feedback on: I have a ...

Laikoni

9:53 AM

@Lembik No, I don't see why it would be to hard. There have been some challenges involving windows, e.g. this and this. A tag like gui might actually be useful for those.

Lembik

12:46 PM

0

A: Sandbox for Proposed Challenges

Move a window around the screen Your code should open a new window that is at least 100 by 100 pixels in size. Once the window is open you should be able to move the window around the screen using the keyboard. The window should move smoothly but it doesn't matter how fast it moves. gui code...

New Sandboxed Posts

Come on people, I have one job :(

ASCII-only

sees Mego's chat bio

:|

New Main Posts

1:06 PM

0

Q: Two steps forward and one step back

Let's say I'm ten steps away from my destination. I walk there following the old saying, "Two steps forward and one step back". I take two steps forward, one back, until I'm standing exactly on my destination. (This might involve stepping past my destination, and returning to it). How many steps ...

code-golf

moonheart08

@ASCII-only noot noot

moonheart08

2:04 PM

I was looking through IOCCC entries for 2015, and then i saw this.
http://www.ioccc.org/2015/muth/hint.html
It looks like C preprocessor abuse can be 10x worse

J. Sallé

@moonheart08 Damn those computer scientists!

moonheart08

But yea, who knew #define was turing.

ASCII-only

2:21 PM

> was turing

moonheart08

err

is

lol

i can no use english correct

ETHproductions

I think you mean "Turing-complete"

ASCII-only

This is PPCG so we say "TC"

user202729

Yes, there is a language called "Preproc" on TIO.

Pavel

I have no idea if it's TC

user202729

2:29 PM

I wrote a reverse-a-list with it.

Pavel

That's hardly proof of TC-ness

J. Sallé

Well if C's preprocessing is TC and Preproc uses C's preprocessing...

user202729

@Pavel Of course it isn't...

ASCII-only

@J.Sallé Who knows, maybe Preproc only uses a subset of the preprocessor functionality :P

Pavel

@J.Sallé Is it TC?

user202729

2:32 PM

tio.run/##KyhKLSjKT/7/XzkzLzmnNCXVprgkJTNfL8Pu/38A

J. Sallé

@Pavel according to moonheart's link above, yes. (ioccc.org/2015/muth/hint.html)

@ASCII-only that's true

user202729

Looks like it actually uses full C preprocessor.

Pavel

It literally creates a cpp process

It's a really thin wrapper

Actually I was wondering if you can use it to output any arbitrary text

So you can quine in it

user202729

Arbitrary text... no. The text must be present in the program. About quine... probably yes.

Pavel

@user202729 I meant that there are certain things that are rather difficult with the preproccesor. For example, starting a line with a #.

Not sure if it's possible.

Although for quining purposes, you could just start every directive with a space before it.

user202729

2:36 PM

@Pavel tio.run/##KyhKLSjKT/7/XzklNS0zL1WhQgHK4qoAsiv@/wcA

... ok, prepend a space.

Yes, doesn't look possible.

Pavel

@user202729 In case you're intrested, here's the closest we've gotten to a quine (by ATaco): tio.run/##KyhKLSjKT/7/…

mınxomaτ

2:51 PM

Hm. Vue is pretty awesome.

Pavel

What's awesome about it?

moonheart08

3:17 PM

cppreference.com is my savior.

Seriously, i forget how something works, and it's the only ad free site that has help >_>

Pavel

@moonheart08 I find that MSDN is super nice (if you aren't looking for something UNIX-specific)

moonheart08

I work on UNIX(like) machines (Linux is my main OS) so it helps to not have to see their fluffy windows only replacement recommendations for various std functions :p

Pavel

Are there really a lot of those?

moonheart08

There are enough it can get annoying to see the top half of the doc just be a pointer to a windows only replacement

Pavel

I can't say I've run into anything like that, but I don't use C++ all that much either.

moonheart08

3:23 PM

Plus, i'm generally looking for syntax info

ASCII-only

Hmm where's the best place to ask math questions

Adám

@ASCII-only math.SE or mathoverflow or LeakyNun.

10

ASCII-only

> LeakyNun

+1

Pavel

Or Dennis

Or Wheat Wizard

quartata

@Pavel until C++11 creating a thread required conditional compilation

Pavel

3:28 PM

wat

moonheart08

Exactly what quartata said. C++11 (and higher) is the best

quartata

pthread == POSIX threads

moonheart08

C++17 especially.

quartata

Windows has CreateThread instead

C++17 got std::filesystem too if I'm not mistaken

moonheart08

Yup

std::filesystem was added in C++17

Pavel

3:30 PM

Good thing we don't have to use anything from earlier than C++ 11

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Make me some curry Tags: code-golf, function, functional-programming Related: Arbitrary-length currying Having a function f that takes arguments x1, x2, …, xn – ie. f : X1 × X2 × … × Xn → Y – currying redefines f as a function taking ...

Pavel

Because like everything supports 17

moonheart08

@Pavel Microsoft's C++ compiler only has partial support

everything else (GCC and Clang) has full support

quartata

I would also point out that there will never be a cross platform way of forking

Windows is trash

moonheart08

agreed

quartata

3:32 PM

I guess conversely.... uh..... hm.... Windows has APC? oh wait you can do signals

Pavel

And yet, I can't get rid of it, for it plays my games.

moonheart08

@Pavel Wine's support for various games is amazing these days

what games do you play?

Pavel

Rainbow Six: Siege

Which doesn't start in Wine

moonheart08

RIP

No support yet

Pavel

Also, Windows doesn't have SIGPIPE, and I don't know what the equivalent mechanic is.

moonheart08

3:34 PM

@Pavel a very cruddy virtual filesystem for pipes

that's it's "equivalent mechanic"

quartata

You can get an EPIPE

moonheart08

> in practice, everything's O(1) anyway.

quartata

you just don't get a signal, instead the syscall fails

moonheart08

What about infinite loops, for say a game loop

or a event loop

quartata

that's O(1)

moonheart08

3:38 PM

huh

Really depends on the timescale of O doesnt it? :P

quartata

in that the upper bound on it is about 10^100 years

Pavel

Everything dies eventually

moonheart08

@Pavel even my imaginary indestructable unkillable object?

Pavel

Yep. Imaginary things die once you stop thinking about them :P

moonheart08

I wonder. is this chat room imaginary? I should stop thinking about it, it's distracting.

2

~~I obviously enjoy my own messages, because i just tried to star it without looking at the name. >_>~~

ASCII-only

3:44 PM

Clearly the entirety of PPCG is just a figment of your imagination designed to make you abandon your (school)work every day for the rest of your life

moonheart08

Obviously, because i'm getting behind in schoolwork due to this chat room. ~~i really should stop talking now~~

At least they don't block stackexchange entirely.

ASCII-only

related: it's ~2AM here and I'm still working on my math assignment (well I only have one question I'm not sure of the working on, but still)

moonheart08

RIP. Get some sleep, it'll save you so many troubles. Source: am currently sleep deprived

J. Sallé

Sleep is for WEAKLINGS, drink coffee instead.

ASCII-only

well for me 2AM is early if anything (not that I'm normally allowed to sleep this late)

protip: don't drink coffee, you'll get addicted

stay awake via TNB, it's far better than any drug out there

5

moonheart08

3:49 PM

I only drink coffee as a last resort (like this morning) anyways

ASCII-only

:| last resort is clearly not a good enough excuse

moonheart08

@ASCII-only I'd say factorio is better at that, unless you count factorio as a drug too

Adám

There's no such thing as tired; only blood-caffeine deficiency.

11

J. Sallé

@ASCII-only pffff no one ever gets addicted to coffee, that's just a myth health organizations spread around

(I'm joking, caffeine is ~~delicious~~ addicting af)

Adám

(Yeah, I should add that I use caffeine very rarely, maybe once in a few months. It is addictive, and the effect diminishes quickly. However, for that rare event when sleep isn't an option, it is useful. Definitely a drug, though.)

moonheart08

3:58 PM

We all know (or rather, anyone in ppcg-gaming knows) that Factorio is the best drug

On that note, i need to go update the server again

Pavel

Even thought caffeine is addictive, is there any reason to not be addicted to caffeine

It doesn't cause harm

J. Sallé

@Pavel I myself enjoy a hearty dose of coffee every now and then. Good coffee is really pleasing to drink.

Also I'm fortunate(?) to live in a place where good coffee is easy to come by

ASCII-only

@Pavel kinda. you might suffer from caffeine withdrawal on like a holiday or something

Pavel

Where I live the average street block contains multiple Starbucks. IDK if you consider that good coffee

@ASCII-only just keep drinking coffee while on holiday ez

ASCII-only

@Pavel well i mean it would be bad in exceptional circumstances

Adám

4:05 PM

@Pavel Once thoroughly addicted it doesn't do good. Why bother?

@ASCII-only That.

ASCII-only

e.g. you're somehow caught in a traffic jam for 10 hours straight

J. Sallé

@Pavel american coffee is basically water, so not good :p

Pavel

My way of coffee is basically caffeinated milk with sugar in it anyway.

J. Sallé

My mother only drinks coffee with milk. I don't really care for it that much

Pavel

I don't dislike just coffee, but I think milk and sugar improve it.

Actually on the rare occasion I make coffee at home I put honey in it instead of sugar.

J. Sallé

4:11 PM

I've a friend who does that, but I'm not much of a honey fan either. I usually drink coffee with a bit of sugar, unless it's an espresso. Then, no sugar required.

Adám

I am disgusted by coffee and everything coffee-flavoured. Caffeine pills ftw.

ASCII-only

:| how do you do proofs with gcd

Pavel

If you go to Starbucks it's very easy to get something caffeinated that tastes nothing like coffee. Probably not good for you though.

DJMcMayhem

I don't care about caffeine.

But I really like coffee

Adám

@DJMcMayhem Decaf?

DJMcMayhem

4:15 PM

Not usually

Thomas Ward

@Pavel this is how you OD on caffeine.

Pavel

I'm pretty sure no one has ever OD'd on caffeine by drinking coffee

Adám

@ThomasWard You can't OD on caffeinated drinks, that'd require the equivalent of 80 cups of black coffee on a regular basis (not just once). However popping 40 caffeine pills is doable…

Pavel

You'd probably die of water intoxication first

DJMcMayhem

ODing on caffeine sounds horrible. Your heart pounding, hands shaking, sweating a ton... Ugh

Then again, I'm sure ODing on anything else is terrible too

Pavel

4:21 PM

The only people to have died of caffeine od were injecting pure caffeine through syringes.

Adám

@DJMcMayhem At least one would be awake while dying.

ASCII-only

@Adám *awake

J. Sallé

@Adám IMHO decaf doesn't taste like coffee at all

Pavel

CMP: Iced coffee y/n?

ASCII-only

yes because sugar

DJMcMayhem

4:23 PM

@Pavel Iced regular coffee? Nah. Iced sweet coffee drinks? mmmmhhhhmmmm

Adám

@Pavel This page disagrees. (about one quarter way down)

Pavel

Note to self: don't drink 25 red bulls in one day

ASCII-only

@Pavel or 7 double espressos. which is a lot more realistic.

DJMcMayhem

Strangely relevant: caffeineinformer.com/death-by-caffeine

ASCII-only

random math question: how can you show y + x z and z are coprime given y and z are coprime

H.PWiz

4:27 PM

y + x z?

Cows quack

what is x?

ASCII-only

yes

@Cowsquack it could be any integer

H.PWiz

what is y + x z? y + x*z?

ASCII-only

yeah, bad LaTeX copypasta

Blue

z is coprime because z is coprime.

Cows quack

4:34 PM

you can't factor out any of z's prime factors from $y+x*z$

because $y$ doesn't not share any prime factors from $z$

does that work?

H.PWiz

@ASCII-only If they were not coprime, there would be an Integer n which divides both y + xz and z. Since, if n divides z, it divides xz, it would also divide y. A contridiction

ASCII-only

:| i already have n. should I rename the existing one to m?

J. Sallé

@Pavel good god no it's hideous

H.PWiz

@ASCII-only No rename this one to d (or m)

moonheart08

I love making my C++ code concise.

float distance_nsqrt(const Point &a, const Point &b) {
auto tmp = pow(a - b, 2);
return tmp.x + tmp.y;
}

J. Sallé

4:43 PM

@moonheart08 no idea what any of that means, but nice? >.>

moonheart08

Wait. This was the wrong window

lol

well, too late now. Cant delete it.

DJMcMayhem

CMC: What answer that isn't on PPCG are you most proud of?

Leaky Nun

@ASCII-only let d divide y+xz and z, i.e. dm=y+xz and dn=z. Then, d(m-xn) = y and dn = z, so d is a common divisor of y and z, so d=1

J. Sallé

@DJMcMayhem either this one or this one, not sure. (I'm assuming you're talking about SE questions)

DJMcMayhem

Yes, answers to SE questions

Cows quack

4:51 PM

@DJMcMayhem this one :D I learnt a lot about vimscript in that answer

DJMcMayhem

:D

I remember that one, I forgot that it was you who answered it though

Cows quack

now that I look at it, it's really hacky

ASCII-only

Is this ok or is my working completely terrible:

Cows quack

what is the inverted epsilon?

DJMcMayhem

@Cowsquack I remember when you first posted that, it worked fine, but now I'm getting this error:

Error detected while processing function MouseScroll:
line    5:
E20: Mark not set

ASCII-only

4:54 PM

@Cowsquack I'm using it basically as shorthand for "such that" (it's just in but goes the other way)

DJMcMayhem

(No pressure if you don't feel like fixing it atm)

Cows quack

@ASCII-only not that, the other one (mirrored ∊)

DJMcMayhem

My proudest answer would have to be this one

ngn

@Cowsquack it's exactly that, a mirrored "is in" :)

H.PWiz

@ASCII-only Be careful, my working was pretty bad. You really want to end with m|y => m=1

Cows quack

4:56 PM

@DJMcMayhem I take it you are using the same mapping? imap <LeftDrag> <ESC>ma<LeftMouse>:call MouseScroll()<cr>:norm gi<cr>

ASCII-only

@H.PWiz wait wat

DJMcMayhem

I was using the map from normal mode

H.PWiz

@ASCII-only See Leaky Nun's proof

ngn

@ASCII-only do you really need to allow negative numbers? if not, you should use N instead of Z

ASCII-only

@ngn The question says Z, it's probably supposed to be N but idk if I should

H.PWiz

4:59 PM

@ASCII-only You have m|z => m⍭y, but if m=1 this implication doesn't hold

Cows quack

then I will have to look into it sometime later

ASCII-only

Oh yeah >_>

moonheart08

I wonder if C++20's spaceship (<=>) operator will be useful for golfing in any way

Pavel

What does it do?

moonheart08

Three way comparison

It's described a bit farther down the page on en.cppreference.com/w/cpp/language/operator_comparison

Adám

5:03 PM

@moonheart08 Not three way, just comparison yielding smaller/equal/bigger.

New Main Posts

0

Q: Integer in set theory

In set theory, we define integers as 0 = {} 1 = {0} = {{}} 2 = {0,1} = {{},{{}}} 3 = {0,1,2} = {{},{{}},{{},{{}}}} 4 = {0,1,2,3} = {{},{{}},{{},{{}}},{{},{{}},{{},{{}}}}} ... Given a non-negative integer, output its set theory expression. Order in sets doesn't matter. E.g. outputting 4 as {...

code-golf math set-theory

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Tidy up my bit string I have a series of binary switches, which I can represent as a bit string. The last person that used my switches left them in some arbitrary messy state, and it bugs me. I always keep the switches in one of four possible "tidy" configurations: All 1: 111111111 All 0: 0000...

Adám

@moonheart08 I wonder if the result of a<=>b is defined for cases when a≠b.

moonheart08

Really the <=> operator actually is useful for devs that otherwise don't need it, too, due to something it brings along with it: all the other operators can be implicitly implemented by the compiler if you define <=>

Pavel

Defining == should be able to implicitely define != but iirc that doesn't happen

moonheart08

5:06 PM

agreed

ASCII-only

@Pavel because of things like NaN maybe

moonheart08

^ maybe

Pavel

The point being, defining <=> probably won't define any other operators.

ASCII-only

@Pavel It does in a lot of languages

moonheart08

No, it will. It's part of the standard :)

Pavel

5:07 PM

Ah

ASCII-only

IIRC Python used to do that too when cmp was still a thing

Pavel

@moonheart08 Does defining < and == define <=?

moonheart08

I don

't think so

it's a <=> operator thing apparently

yea

default comparisons are C++20

only <=> does it

but C++20 is looking promising already, with things like a potential fix for how convoulted #include can be. (a compiletime module system)

Pavel

Near as I can tell, C++ 20 modules are basically C#/Java imports.

Adám

@moonheart08 Wouldn't - always be shorter than <=>?

moonheart08

5:15 PM

Well, even that is better than the include system lol

@Adám Hmm, good point.

Pavel

@moonheart08 C# imports are good. I don't know how I'd improve on them really.

moonheart08

@Pavel never used C#

i have used java tho, and java is just awful.

Pavel

@moonheart08 Howabout java?

Yeah but the import system isn't bad.

Although you have to tag on an extra .* at the end that's implicit in C#

moonheart08

Yea, java imports are actually fairly nice

J. Sallé

@moonheart08 don't you dare! Java has type inference!

moonheart08

5:17 PM

lol

@J.Sallé so does C and C++

auto

J. Sallé

that_was_the_joke.jpeg

Pavel

Doing imports by package/namespace rather than by file is a really neat idea.

moonheart08

well_moony_doesnt_understand_jokes.jpeg

J. Sallé

rofl fair enough

betseg

is _Generic in C type inference

Pavel

5:18 PM

I think the joke is specifically referencing that there wasn't type inference in Java until this week

moonheart08

lol

Pavel

They copied C#'s var.

moonheart08

java 10 is going to give the Minecraft Forge devs such a hard time

i feel bad for them

Pavel

@moonheart08 Why's that?

They'll probably just keep on using Java 8

moonheart08

True, but what happens if MC 1.13 is released using java 10?

Pavel

5:20 PM

It probably won't be, and so what if it is?

moonheart08

Well, for one, i bet there's probably been some changes to the JVM bytecode format

and that's just one possible issue

Pavel

It's still backwards compatible. Java 10 can load libraries compiled under way earlier Java versions.

And anyway, C# 10 doesn't really have breaking changes.

Except var became an illegal type name

mınxomaτ

@Pavel They should have copied Kotlin's val/var

Pavel

@mınxomaτ That was the original proposal but it got rejected.

moonheart08

shame the C++ std doesn't have a function to compute a value to a arbitrary root (i.e. like to the fourth or fifth root)

Pavel

5:24 PM

Apparantly Java doesn't like immutable state.

@moonheart08 Can you #define root(b, x) pow(x, 1/b)

mınxomaτ

Java is probably going to get val, but like this: final protected sealed missile-defended var

14

Pavel

@mınxomaτ Well considering it's only for local variables, the most you can stick on it is final.

C# has readonly var

mınxomaτ

It has readonly T

betseg

@Pavel yes

Poke

@Pavel why do you say this

betseg

5:33 PM

C#'s var == C++'s auto?

Pavel

Not quite

You can't use it as a function return type

But other than that yeah

J. Sallé

@Pavel the same as Java if I interpreted the release notes correctly?

Pavel

Yes

J. Sallé

Can you declare a function that returns a String and return that var instead? as in String foo() {var s="bar"; return s;}?

Pavel

Yes

Poke

5:38 PM

jdk 10 has val i'm pretty sure. it seems like you guys are talking about it "eventually getting" it

jdk 10 is released

Pavel

It does not have val

J. Sallé

Well that'll probably be useful somewhat.

Pavel

@Poke JDK 10 is TIO: tio.run/##y0osS9TNSsn@/…

J. Sallé

@Poke if I understand correctly val ≠ var

mınxomaτ

JDK 10 var/val discussion: news.ycombinator.com/item?id=16636646

Poke

5:40 PM

sorry that's a typo

meant var

Pavel

@mınxomaτ Reasoning for not including val: mail.openjdk.java.net/pipermail/platform-jep-discuss/…

@Poke Oh yeah, we all know that. That's not the point though.

moonheart08

did someone ping me?

Poke

@Pavel maybe i misread what someone typed. my bad

mınxomaτ

> The written comments had more of a negative bias, but this shouldn't be
surprising; people generally have more to say in disagreement than in
agreement.

ain't that the truth

J. Sallé

@mınxomaτ I mean, why write something positive when you can just leave your upvote? Downvotes are the ones that usually come with a justification.

mınxomaτ

5:46 PM

Heh, tell that to StackOverflow.

J. Sallé

↑↑ that was supposed to sound sarcastic btw.

New Main Posts

5:56 PM

-1

Q: Colliding balls

Two balls on an axis collide with no energy loss. Given the mass and velocity of two balls before they collide, what are their velocities after the collision? Hint: Before and after the collision, m1v1+m2v2 and m1v12+m2v22 both remain unchanged. Samples m1 m2 v1in v2in v1out v2out 1.0 ...

code-golf

DJMcMayhem

6:10 PM

@DLosc It looks like Brain-flak is going to end up being the language of the month for April. Can I help write part of that post? Assuming you use the same format as you did for Brachylog, I mean specifically the Information about Brain-Flak part?

@Pavel You helped with Brain-flak challenges last year. Do you have any more?

in The Third Stack, 1 min ago, by DJMcMayhem

@user56656 @Riley @Pavel Since you three helped out last year, we could use your help again this year. So dust off your brain-flak-themed-challenge-writing-hats, and try to see if you can come up with any more brain-flak themed challenges for the second birthday!

(The first ping didn't work because you haven't been in TTS in a while)

J. Sallé

Would be cool to learn some brain-flak

Although I don't know if I have the required amount of masochistic tendencies.

DJMcMayhem

@J.Sallé I'm always happy to help if you have questions.

And there are a bunch of people in TTS too

Erik the Outgolfer

@DJMcMayhem at least you didn't abuse superpings...

DJMcMayhem

That's why I pinged him in here

J. Sallé

@DJMcMayhem I don't even know where to begin though. I've never even messed with brainfuck.

DJMcMayhem

6:23 PM

They're actually pretty different. Brain-fuck is tape-based and flak is stack based

The only similarity is in the name and the turing tarpitness (both have 8 commands)

J. Sallé

Still, no idea where to begin.

DJMcMayhem

@J.Sallé If you're interested, start with the README. Then try some simple programs: 1) Add two numbers 2) Subtract two numbers 3) Shortest code to push 60 4) Reverse the input 5) given at least 2 inputs, output the first input minus the last input. Those 5 are all good starting points. And ask question in TTS

Then, if you want a bigger challenge, try to write a snippet to multiply two numbers without looking at existing snippets

Oh, also 6) Given N, print the n'th triangular number. That's a good beginners task. Plus it has a really cool more advanced technique to do it in 16 chars.

J. Sallé

@DJMcMayhem sounds good, will do.

quartata

6:41 PM

at the demands of <<The Haters>>) i have changed my chat bio. don't expect me to do this ever again. thank.

(@ASCII-only)

Pavel

@quartata What's Chaitin's constant?

quartata

Chaitin's constant

In the computer science subfield of algorithmic information theory, a Chaitin constant (Chaitin omega number) or halting probability is a real number that, informally speaking, represents the probability that a randomly constructed program will halt. These numbers are formed from a construction due to Gregory Chaitin. Although there are infinitely many halting probabilities, it is common to use the letter Ω to refer to them as if there were only one. Because Ω depends on the program encoding used, it is sometimes called Chaitin's construction instead of Chaitin's constant when not referring to...

forgot to mention not to @ me on this

Pavel

@DJMcMayhem Honestly superping would have been more convenient

DJMcMayhem

Oh sorry. I'll remember that next time lol

Esolanging Fruit

7:03 PM

Hi

Riker

@flawr @betseg en.reddit.com/r/AskReddit/comments/877zl5/…

betseg

10/10 will try

flawr

@Riker sounds great:) just don't know whether oreos actually have any value

(and I don't know anything about D&D)

does this mean that I'm not a true nerd?

betseg

ive played D&D once

am i nerd

DJMcMayhem

@betseg You're on TNB, the answer must be yes :P

moonheart08

7:19 PM

if (user.is_on_tnb == true) {
user.is_nerd = true;
}

Poke

@moonheart08 was this written by a non-tnb user? it seems golfable :P

DJMcMayhem

user.is_nerd=user.is_on_tnb;

moonheart08

aww you beat me lol

but

that wont work

what if they're a nerd and not on TNB

if(user.is_on_tnb){user.is_nerd=1;}

betseg

bool User::isNerd(User user) {
    if(user.groups.includes(Group.TNB))
        return true;
    else { /...

flawr

public static void main...

Riker

7:23 PM

@flawr no it means you should find a d&d group tho

Giuseppe

@moonheart08 TNB membership is a sufficient but not necessary condition

Poke

public class UserFactory...

moonheart08

@Giuseppe dont tell me that, i had it right. tell that to DJ

public class UserFactoryFactory

// used by factories that produce internet routers.
public class UserFactoryFactoryFactory

And finally

public class FactoryFactory

flawr

public class FactoryOutsourcingSubcontractor

moonheart08

How do i format a tag into a post?

nvm

figured it out. code-golf

Pavel

7:58 PM

CMC: Find a sufficient and necessary condition for being a nerd

moonheart08

being in TNB obviously

Pavel

Sufficient but not necessary

Riker

not sufficient either

ex: any bot somebody puts in here

the bot is 'in TNB' but not sentient/sapient (either) so it can't be a nerd

moonheart08

oh, i didn't read the 'sufficient' part

lol

being sentient

Pavel

Necessary but not sufficient

moonheart08

7:59 PM

hum

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