The Nineteenth Byte

6:00 PM

@mınxomaτ hahaha I had to block PPCG and meta sites

@mınxomaτ I'm curious how the integration works between windows. Like, does sound work on the linux window? What about minimum/fixed sizes of windows? Notification flashing of a window?

TimmyD

@EᴀsᴛᴇʀʟʏIʀᴋ Fascinating. But reading some of the comments on that makes me sad, like "The simple fact that they allowed "uncommented" code into an operating system's codebase is simply embarrassing." ... I didn't realize that Pinball was considered a key component of Windows' codebase /eyeroll

mınxomaτ

@NathanMerrill Answer: Pretty much everything X provides works. Sound is not an X feature, but let me test that.

Leaky Nun

strawpoll.me/11061651

Nathan Merrill

Super Mario Bros. - Theme (Ground Theme)

►

mınxomaτ

6:06 PM

@NathanMerrill No, hardware devices are shielded from lxss (the WSL demon). There would most likely be a conflict of programs trying to access the same resource anyway. JACK would solve that, but I highly doubt that's ranking high on MS's feature list.

The only way I see to hack this together is writing a linux driver that pipes audio over some kind of local network and a client waiting on the windows side.

Nathan Merrill

especially because they don't officially support windows yet

TùxCräftîñg

mymoustache.net

wat

TimmyD

Heh. I just envisioned someone trying to write a time-sliced audio driver that allocated chunks of the audio queue to the two subsystems ... and the resultant hiss of sheer noise that would happen.

mınxomaτ

@NathanMerrill Well, the next hardware support is set to be GPU access. Which would be nice. Right now, it's a software OpenGL stack. But a good one, OpenGL tests (mesa) etc. run fine.

Helka Homba

What's everyone's favorite key on their keyboard? I'd say ESC.

Nathan Merrill

6:10 PM

space

TùxCräftîñg

altgr

Nathan Merrill

bigger is clearly better

TimmyD

@HelkaHomba Based off of keycap wear, I'd have to say the right hand side of the spacebar.

Nathan Merrill

and if you don't have a massive space bar, you're doing it wrong

Business Cat

Scroll lock

What does it even do

TùxCräftîñg

6:10 PM

@NathanMerrill wat a small spacebar is better

because smaller spacebar = more key = more macros = \o/

Business Cat

@NathanMerrill Size isn't everything

mınxomaτ

20

A: Sending audio through network

What you're looking for is a sound server. These programs send sound over the network. Choices include JACK, NAS, Pulseaudio and more. Pulseaudio is the default audio system on Ubuntu and is widely available on Unix. JACK is widely available on desktop operating systems and prides itself on its ...

El'endia Starman

@TimmyD In the course of trying to figure out which of my keys are most worn, I've noticed that keys that I press with my right hand are generally more worn than those I press with my left hand. With the exception of the spacebar, which I press only with my left hand.

TimmyD

@mınxomaτ Interesting. I use DLNA for that sort of stuff, but that's an admittedly different technology vertical.

mınxomaτ

I think the most promising option is a pulseaudio device in WSL sending stuff to a Windows client, since PA has native Windows builds. Gonna try that...

zyabin101

6:16 PM

Hello from Mom's phone :I

TimmyD

Which hand do you use to press the spacebar while typing?

mınxomaτ

Hand? Damn, I've just been banging my nose on the keyboard. Don't tell me there's a better way!

2

Business Cat

I use alt+32

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Lame template, powered by your language's own functions code-golf string This challenge is not about you doing the job, but you letting your language to do the job. In an imaginary language given a template string Hello {placeholder|upper|reverse|rot13} World! and a template variable place...

TùxCräftîñg

i use compose+s+p+a+c+e

TimmyD

6:19 PM

@mınxomaτ If you're doing that, you could at least do what Homer Simpson did and use a drinking bird

Dennis

@EᴀsᴛᴇʀʟʏIʀᴋ Your "wat".

Nathan Merrill

I use predictive text to identify where the words split

mınxomaτ

@TimmyD Actually that was a Simpsons reference, but to the orange juicer infomercial.

Nathan Merrill

woah, my "git status" just finished

and it marked every file as modified

TimmyD

@mınxomaτ Oh yeah.

Interesting that it's pretty evenly split left-hand/right-hand.

TùxCräftîñg

6:24 PM

.OOO

The domain name OOO (Triple O - Alphabet O) is a top-level domain (TLD) in the Domain Name System of the Internet. It was launched and is operated by Infibeam. == References... ==

...

Nathan Merrill

@mınxomaτ how does networking work? It sounds like X server listens on a network port that linux then connects to. Does that mean that both systems are running on the same network?

zyabin101

Sixth paste in the "Hi, What's Your Name?" series.

mınxomaτ

Of course. The network device is the same.

X always runs as a server. E.g. for X over SSH.

Nathan Merrill

I didn't realize that localhost still operated on the actual network device

mınxomaτ

As I said in my blog post, every process in WSL is run as an actual Windows process, manageable by the Task Manager etc. It's just called "picoprocess".

Lynn

6:27 PM

God, I’m speedrunning Vim.

Nathan Merrill

I thought it was kind of all magic that happened on the software side

Lynn

To make my recording short enough.

mınxomaτ

@NathanMerrill There isn't really any difference between the linux and Windows host config.

On any system.

@NathanMerrill lxss isn't open source and won't ever be, but if you are interested in how it actually works, take a look at flinux.

zyabin101

@Lynn To make your recording short enough, you can also throw away frames.

Lynn

I’m too lazy to edit GIFs.

zyabin101

6:32 PM

Aww...

Hmm, another idea: Use an automatic keyin program.

You use a console emulator, right?

Welp, I have a word. :/

Hmm, AutoHotkey. :3

mınxomaτ

The non-legacy Windows console has keybindings for copy and past. No need to access the context menu.

Here we go. That is CMD, Powershell, git-bash, alwsl and flinux bash all running in a ConEmu console host on Windows 10.

Madness indeed.

TimmyD

6:47 PM

@mınxomaτ You've gone drunk with power and must be stopped for the good of humanity. ;-)

4

mınxomaτ

7:01 PM

Also, new UAC exploit is way too easy

Just tried it on the latest Windows 10 Build, still works.

Nathan Merrill

does it require powershell?

mınxomaτ

It uses Powershell, but no. It works in pure batch, too.

Just a bit more tedious to write.

Nathan Merrill

so basically, any program can bypass UAC

mınxomaτ

Yes. But what most people just don't want to understand is that UAC is not security feature.

You are supposed to detach the local user accounts from the local admin account. That will prompt you even if UAC is not active. But no one does that for convenience reasons.

There are a few dozen ways to bypass UAC. This one is special, because it doesn't write any files.

Nathan Merrill

...how is UAC not a security feature? It (is supposed) to limit what can be run without the user's permission, correct?

mınxomaτ

7:08 PM

No it's not.

TimmyD

I'm really struggling to understand how that bypasses UAC.

mınxomaτ

That'd what AD permissions (and in 8.1+ smartscreen) are for. UAC is simply a prompt.

TimmyD

All it does is change the default open for .msc files to be whatever command you put in, rather than mmc.exe

mınxomaτ

@TimmyD Yes, and that file is run by a system demon with local admin privileges.

Leaky Nun

@Lynn How do you make those gifs?

mınxomaτ

7:10 PM

@TimmyD Here's a rundown of why it works: enigma0x3.net/2016/08/15/…

Lynn

recordit.co

Leaky Nun

Alright

Nathan Merrill

@mınxomaτ well, its not just a "notification service", because it does ask for permission

so I'm not sure how its not a security feature

mınxomaτ

@NathanMerrill blogs.msdn.microsoft.com/oldnewthing/20160816-00/?p=94105

> As Larry Osterman noted, UAC is not a security feature. It's a convenience feature that acts as a forcing function to get software developers to get their act together.

Leaky Nun

It's 3:14 AM and I have school tomorrow and I can't sleep.

Nathan Merrill

7:15 PM

right, but if "always notify" is set, then it certainly is a boundary, right?

Leaky Nun

Because I've been sleeping after 5AM for so long

TimmyD

@mınxomaτ Oh good gravy. Why the hell is Event Viewer run as a high integrity process to start with?

mınxomaτ

@NathanMerrill It's a barrier, but not a security barrier.[1]

@TimmyD Probably a) to access high integrity keys and b) to not be nuked by amateur AV scanners every few seconds.

TimmyD

Sure, but then run it as admin if you need that. Event Viewer should default to read-only.

Leaky Nun

What is to Cartesian product as 1 is to integer product?

xnor

7:25 PM

@LeakyNun there's no identity up to equality

Leaky Nun

@xnor I don't get this

xnor

there doesn't exist a set T so that S x T = T with cartesian product because S x T is a list of pairs and so has a different type than T

however, if S is any singleton set, there's a bijection between S x T and T

Leaky Nun

Alright

Nathan Merrill

unless S is the empty set

Leaky Nun

the empty set is not a singleton set

an empty list is still a list of pairs

Nathan Merrill

7:28 PM

you're saying that A = {}; A x {1,2,3} != A?

Leaky Nun

@NathanMerrill when did I say that?

Nathan Merrill

even though that {} x {1,2,3} = {}?

xnor

good catch, i meant "there doesn't exist a set S so that S x T = T with cartesian product for every T"

Lynn

7:41 PM

@DJMcMayhem They broke :h<_↵ in Vim 8??

Leaky Nun

@Lynn How do you submit Vim answers to anagol?

Lynn

Use raw bytes (0x1B for Esc, 0x01 for Ctrl-A…). Press ZZ at the end

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Exploded view of a string code-golf string Don't you love those exploded-view diagrams in which a machine or object is taken apart into its smallest pieces? Let's do that to a string! Challenge Write a program or function that Takes as input a string formed by printable ASCII characters...

βετѧ Λєҫαγ

Typical, I post the only badly received alphabet challenge XD

I guess it's all over now

Leaky Nun

@βετѧΛєҫαγ because it isn't easy

DJMcMayhem

7:49 PM

@Lynn I'm not using vim 8 (I don't think it's out yet) I'm on 7.4.2066

Gvim windows, if that matters at all

Lynn

Ooof. What’s in :help at_t? I don’t have it

Sadly no other length-2 infix of v_b_<_example takes you to that example ;-;

DJMcMayhem

ಠ_ಠ

El'endia Starman

@βετѧΛєҫαγ It could possibly be the fact that you duplicated the BbCc, though I doubt that's the main reason. Otherwise, I dunno.

DJMcMayhem

I figured it out.

@Lynn it's this plugin

Lynn

Haha

Maybe you can disable plugins?

DJMcMayhem

7:52 PM

-u NONE fixes it

Haha facepalm

An otherwise fantastic plugin

Leaky Nun

If the Cantor set is the end result, then what is this image?

Cumulative Cantor set?

Nathan Merrill

@mınxomaτ would you mind pinging me when alwsl is ready?

mınxomaτ

@NathanMerrill Sure.

Nathan Merrill

thanks :)

El'endia Starman

@LeakyNun Possibly "Cantor set series" or something like that.

Leaky Nun

8:04 PM

@El'endiaStarman but the Cantor set is specifically the end result

El'endia Starman

@LeakyNun Yes, I read what you said.

Leaky Nun

This image is so common yet it has no name

TimmyD

"An ineffective skyscraper"

Releasing Helium Nuclei

first few steps of creating a 0d fractal?

Leaky Nun

it isn't 0d

Releasing Helium Nuclei

8:16 PM

how many dimensions does the sierpinski pyramid have?

3? 2? 1?

Rohan Jhunjhunwala

hey @Dennis there seems to be a bug in the try it online S.I.L.O.S interrpeter
http://silos.tryitonline.net/#code=Ly9lY2hvIGVhY2ggbmV3bGluZSBzZXBhcmF0ZWQgaW50ZWdlciBmcm9tIHN0ZGluCmxibGIKcmVhZElPIDoKcHJpbnRJbnQgaQppZiBpIGI&input=MQoyCjMKNAow
each readIO call should return the next integer from the nextLine on stdin

Although it can extend itself to any arbitrary number of N dimensions greater than or equal to two

Leaky Nun

@ReleasingHeliumNuclei 2

@ReleasingHeliumNuclei Dimensions of fractals don't work that way.

Rohan Jhunjhunwala

Oh

I'm an idiot

:(

Releasing Helium Nuclei

@LeakyNun yeah fractions

Rohan Jhunjhunwala

So the sierpenski triangle is a one diemensional fractal?

Leaky Nun

8:19 PM

@RohanJhunjhunwala no

Releasing Helium Nuclei

1.5 at best

Leaky Nun

The S triangle is log(3)/log(2)

The pyramid is log(4)/log(2) = 2

Rohan Jhunjhunwala

um

ok irrational dimension numbers

I am unqualified for this conversation lol

Leaky Nun

@TimmyD Factum est.

flawr

@LeakyNun Well most images of fractals are just some point of an iteration where the limit of that iteration would produce dthe actual fractal=)

Releasing Helium Nuclei

8:22 PM

@LeakyNun is the castor set 1d at the end?

Leaky Nun

@ReleasingHeliumNuclei The Hausdorff dimension of the Cantor set is equal to ln(2)/ln(3) ≈ 0.631.

Releasing Helium Nuclei

so 0d was a good estimation :p

Rohan Jhunjhunwala

relevant xkcd

Dennis

@RohanJhunjhunwala Not sure how to fix that.

Rohan Jhunjhunwala

@Dennis how do you pass stdin to programs?

Leaky Nun

8:28 PM

@RohanJhunjhunwala -100

flawr

@RohanJhunjhunwala Yeah, all finite numbers are very small.

Rohan Jhunjhunwala

@flawr can you write a "small" number for me?

@flawr I want one googol zeros on a white board

@Dennis I perhaps could slap in a patch where when the interpreter is run through TIO it will receive the stdin as the command line arguments, and work from there.

Dennis

@RohanJhunjhunwala By piping. That might create problems if the interpreter reopens STDIN for each prompt. TIO isn't meant to run interactive programs.

Leaky Nun

I have no idea how to do my own challenge in GolfScript.

Rohan Jhunjhunwala

@Dennis ok one second, let me research piping, I never really understood the concept

Releasing Helium Nuclei

8:31 PM

@RohanJhunjhunwala provide me a 10^150 km^2 whiteboard and enough time, i'll write one gogol zeroes and there will be trillions of empty ly^2s

Rohan Jhunjhunwala

@ReleasingHeliumNuclei I will give you such a whiteboard if you can write the zeros for me by tomorrow.

Releasing Helium Nuclei

@RohanJhunjhunwala kk

Rohan Jhunjhunwala

@Dennis can you pass the input as command line arguments to my interpreter? i.e make the arguments look like this
fileName lineOneOfStdin lineTwofStdin lineThreeOfStdin?

I can trivially modify the interpreter to work that way

Releasing Helium Nuclei

brb

flawr

@ReleasingHeliumNuclei How about the chalk?

Nathan Merrill

8:38 PM

you use chalk on a whiteboard? oO

flawr

@NathanMerrill haha, a true mathematician never touches these filthy markers

but yes, I was mixing up white- and blackboards

You know, I have a black and white colour blindness.

DJMcMayhem

@RohanJhunjhunwala why not just take input through command line args then? That's what jelly does

Nathan Merrill

woah, everything's just an equal-brightness chromatic mess?

Rohan Jhunjhunwala

@DJMcMayhem I could do that. I prefer input to be in the box marked "input" for clarity, but that still works, Input as CLA is another option I can work with. The issue is that SIL was designed to be an interactive language, so some modifications have to be made to make it compatible with TIO.

Nathan Merrill

Language design question: is it a good idea to deduce the types of function parameters?

flawr

8:46 PM

@NathanMerrill Ew that would be aweful.

Releasing Helium Nuclei

back

Nathan Merrill

I mean, on one hand, it makes writing function definitions easier. However, on the other hand, functions are your API. Its a good idea to have well-defined parameters to any API, as you rarely want to change it

Releasing Helium Nuclei

i will bring my own markers

Rohan Jhunjhunwala

@NathanMerrill persolnally I like strongly typing a language to make clear what you work with at runtime

But a python fan will say otherwise, its all a matter of preference

Nathan Merrill

the question isn't of strongly typing, is basically whether you allow "auto" in function parameters

Dennis

8:47 PM

@RohanJhunjhunwala Using CLAs seems cleaner. Anyway, there are ways to read a line of input in Java. CJam does it.

Nathan Merrill

aka, let the compiler figure out what the type is

flawr

Rohan Jhunjhunwala

@Dennis is the new java.util.Scanner(System.in).nextInt (or .nextLine)(); method not the write way?

flawr

@NathanMerrill I think it is a good idea to explicitly write down the types. Deducing can perhaps result in abiguity, if you e.g. have typeclasses like in Haskell.

Rohan Jhunjhunwala

^

Dennis

8:49 PM

@RohanJhunjhunwala I don't know how CJam does it. You'd have to look into the source code.

Rohan Jhunjhunwala

doFooBar(ParamTypeA a, ParamTypeB b)

Nathan Merrill

well, it looks like everybody agrees with me. I was expecting more people to not want to write their types

:)

Leaky Nun

Can base conversion be done in sub-linear time?

Rohan Jhunjhunwala

oh goody a source forge repository

Not going there :(

flawr

@NathanMerrill You were talking about language design, not about what I want to do or what I actually do=)

Rohan Jhunjhunwala

8:53 PM

@Dennis ok I'll push out a modification which will allow reading of CLA. Is it ok if a ping you when I'm done.

DJMcMayhem

@LeakyNun I highly doubt it. Cause you have to look at every digit

Leaky Nun

@DJMcMayhem I see, thanks

Eᴀsᴛᴇʀʟʏ Iʀᴋ

9:10 PM

@RohanJhunjhunwala lel don't mention that to adsitu

New Main Posts

9:25 PM

0

Q: Find the minimum and maximum integers in an array, without using builtins

Challenge Given an array of integers, received from stdin, function arguments, program arguments, or some other method: Output only the minimum and maximum numbers in the array, through a return value, stdout, or other fitting methods. Example session > minmax( {0, 15, 2, 3, 7, 18, -2, 9, 6, ...

0

Q: Create an unlimited counterstring

A counterstring is some sort of self-describing test data that is used in software testing. Not sure it was actually invented by James Bach, but I know it from there. The idea is as follows: the test data contains many asterisk (*). The number in front of the asterisk tells you how long the test...

code-golf counting

Dmitry Kudriavtsev

9:38 PM

ugh, maybe I should have disallowed sorting

flawr

@DmitryKudriavtsev Welcome to PPCG, consider using the sandbox.

Dmitry Kudriavtsev

> welcome to ppcg

I've beenon here for months

Nathan Merrill

I would have personally allowed sorting

it does make answers easier, but disallowing sorting definitely makes the challenge more of an X without Y

Dmitry Kudriavtsev

why? It's boring and I want creative soltuions

Nathan Merrill

define creative

you want a for loop?

Martin Ender

9:43 PM

they aren't getting more creative than sorting and taking the first and last

Dmitry Kudriavtsev

ok, this is good enough I guess

Martin Ender

if you disallow that too you just get people looping over it, keeping track of the minimum and maximum. that's boring.

Dmitry Kudriavtsev

My reference implementation is a for looop

Martin Ender

one could also fold pair-wise minimum or maximum over the list, but you've disallow min/max built-ins, so...

Dmitry Kudriavtsev

@mınxomaτ How did you do that?

El'endia Starman

9:44 PM

Man, I wonder how creative solutions could have been with min/max built-ins...

mınxomaτ

@DmitryKudriavtsev How did I do what?

Dmitry Kudriavtsev

it's third in testar list

the star list**

mınxomaτ

4 hours ago, by mınxomaτ

Also, I'm currently finishing up alwsl. Should be stable in a few days.

Dennis

@RohanJhunjhunwala Sure.

Dmitry Kudriavtsev

@El'endiaStarman puts v.min;puts v.max

thanks

Martin Ender

9:46 PM

MinMax in Mathematica, actually...

Dmitry Kudriavtsev

Why yaourt??? Pacaur is objectively better

El'endia Starman

@DmitryKudriavtsev That'll only work in a few languages at most.

Dmitry Kudriavtsev

@El'endiaStarman True.

@mınxomaτ Seriously, why yaourt?

ΛεγίωνΜάμμαλϠΨΠʹ

@MartinEnder You know, we should compile a list of uncommon but useful-for-golfing functions in Mathematica...

El'endia Starman

It generally helps to give people the freedom to accomplish the core task of a challenge in any way they want.

Dmitry Kudriavtsev

9:48 PM

@ΛεγίωνΜάμμαλϠΨΠʹ I'll make the thing

Martin Ender

@DmitryKudriavtsev can you address Leaky Nun's comment? you're already getting answers making different assumptions about that.

Dmitry Kudriavtsev

I did

DJMcMayhem

It's actually a lot harder in V than it should be: v.tryitonline.net/…

Martin Ender

@DmitryKudriavtsev it usually helps to address comments in the main post. comments aren't meant to be permanent and moreover I wouldn't expect every participant to read the comments. people will assume that all the rules and edge cases are found in the challenge body.

Dmitry Kudriavtsev

OK, I'll update the post.

DJMcMayhem

9:57 PM

I suppose I could do :2,$-1dn but that's longer and boring

Leaky Nun

As a consequence it is 5:57AM and I never slept and I still have to go to school...

Dmitry Kudriavtsev

wow, lol

El'endia Starman

@LeakyNun Don't take a nap tomorrow. Hopefully that'll help you go to sleep earlier.

Leaky Nun

@El'endiaStarman I'd probably just sleep in class

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DJMcMayhem :sort doesn't have a short version?

New Main Posts

10:00 PM

0

Q: Pokemon GO Evolution Cost Calculator

Tired of always wondering how many more Pokémon you need to catch to get those high-tier evolutions? Wonder no more! Now you will write a complete program or function to calculate it for you! The Challenge: As input, your program will receive a list of the costs in candy to evolve a Pokémon to ...

code-golf game

DJMcMayhem

@EᴀsᴛᴇʀʟʏIʀᴋ Oh hey, there's "sor". Thanks!

I've been meaning to add a shortcut for it though

Eᴀsᴛᴇʀʟʏ Iʀᴋ

ye

DJMcMayhem

You wanna post that? I've been waiting for sometime else to do V, and I think it's a little bit boring so idk if I will.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

sure!

give me a sec

done

Anonymous

Gah. Today's theme for challenges is "use the frickin Sandbox"

Eᴀsᴛᴇʀʟʏ Iʀᴋ

10:07 PM

lel

DJMcMayhem

@EᴀsᴛᴇʀʟʏIʀᴋ Yay! Now see if you can explain it. :P

Eᴀsᴛᴇʀʟʏ Iʀᴋ

give me a mo

playing tf2

1

A: Find the minimum and maximum integers in an array, without using builtins

V, 12 bytes :sor ò2Gjkd Try it online! Credit to DJMcMayhem for this.

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Planting Sugarcane In the game Minecraft the crop sugarcane can only be planted on a block next to a water source block. Task Given a area what is the most efficient way to place water such that every tile in the area is next to a water block. That is how do you place water to maximize the am...

El'endia Starman

@Mego Bahaha, indeed...

Anonymous

I've said it on 3 out of the 5 newest challenges

Eᴀsᴛᴇʀʟʏ Iʀᴋ

10:09 PM

where are docs @DJMcMayhem

Anonymous

Make that 4/5

flawr

@Mego Vote to Close as a dupe from yesterday.

Anonymous

@flawr Vote to reopen and feature it because it constantly needs to be said

DJMcMayhem

@EᴀsᴛᴇʀʟʏIʀᴋ there's a little bit on GH wiki

Eᴀsᴛᴇʀʟʏ Iʀᴋ

kk

DJMcMayhem

10:11 PM

Other than that, just vim

Anonymous

I really don't know what more we can do to encourage new users to use the Sandbox, other than downvoting their problematic challenges and leaving "use the Sandbox please" comments.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DJMcMayhem ó goes to end if no closing ó?

El'endia Starman

@Mego I think that is pretty much all we can and should do. New users will always need to be educated on the fact that the Sandbox exists and should be used.

DJMcMayhem

@EᴀsᴛᴇʀʟʏIʀᴋ that's undocumented, but yes. But what does "d" do?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

no clue

DJMcMayhem

10:14 PM

:D

That's actually a relatively new feature that I'm very proud of

Eᴀsᴛᴇʀʟʏ Iʀᴋ

where do you keep the command codes?

nvm

:/ i don't know vimscript very well

Rohan Jhunjhunwala

I'm I the only one that thinks the pokemon go challenge is trivial (and MUST be a dupe of something!)

Leaky Nun

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A: Produce the number 2014 without any numbers in your source code

C (gcc 5.3.1), 49 bytes main(a){printf("%d",(++a<<(a<<a|a))-(a<<a+a)-a);} Undefined behaviours. Specifically, use this compiler (languages are defined by implementation). Without undefined behaviour (which would work on all compilers), 51 bytes main(a){a++;printf("%d",(a<<(a<<a|a))-(a<<a+...

Lynn

Non-halting programs are dangerous to online interpreters. — Leaky Nun 50 mins ago

This shouldn’t matter, IMO…?

Leaky Nun

CMC: given positive integer n, output at least how many distinct powers of 2 are required to represent n, using addition and subtraction.

Lynn

10:18 PM

Just don’t run your program in an online interpreter. Problem solved.

Dennis

Or use a sensible online interpreter like TIO that kills the program after 100 KB of output.

3

DJMcMayhem

@Dennis I thought TIO doesn't output until the program is over

Rohan Jhunjhunwala

I actually had to use TIO to generate 27 k z's for my java submission

Dennis

Nope, output is in fact incremental.

Leaky Nun

For example, 2014 can be represented as 2048 - 32 - 2, which requires 3 powers of 2

Rohan Jhunjhunwala

10:20 PM

(but that was thankfully less than 100k output)

DJMcMayhem

@Dennis huh. Til. But input is not?

Dennis

How would incremental input work?

DJMcMayhem

Idk, I don't know anything about the backend

Too bad incremental output is impossible for V

Leaky Nun

no love for my cmc

;_;

Dennis

Isn't that just the number of 1 bits?

feersum

10:24 PM

@LeakyNun lambda n:n != 0

Leaky Nun

@Dennis no, because 2048 - 32 - 2 = 2014

Dennis

Ah subtraction. Nevermind.

feersum

Better, 1 + 1 + 1 ... + 1 = 2014

Downgoat

@LeakyNun examples pls :3

Leaky Nun

@Downgoat 2048 - 32 - 2 = 2014

so 2014 -> 3

because I used 3 powers of 2

Downgoat

10:25 PM

oh ok

Leaky Nun

@feersum I said "at least"

Downgoat

so like 2^n not n^2

Leaky Nun

@Downgoat when did "powers of 2" mean n^2 ?

Downgoat

good question

Dennis

@Downgoat n² is a second power, not a power of 2.

feersum

10:27 PM

@LeakyNun I don't know what you mean by that. I don't see the words "at least" in your challenge.

Oh I see it now!

But it still makes no sense.

Leaky Nun

@feersum then read it again until you find it

well you cant do 2014 with two powers of 2

so you need at least three

feersum

The words "at least" don't make grammatical sense there to me.

Leaky Nun

@Dennis golfier: "a square"

feersum

Anyway, I made 2014 using only one distinct power of 2.

So I don't see how that isn't less than 3.

Leaky Nun

holy cow, your expression does not consist of distinct powers of 2

now get over semantics

feersum

10:29 PM

Maybe what you meant is to remove "distinct" ?

Leaky Nun

whatever

i meant unique

as in you cant use a power of 2 more than once

feersum

I don't think using a power of 2 more than once would even be helpful.

If you're trying to minimize the total number of terms.

Leaky Nun

i dont care, just do it alright

Dennis

@LeakyNun That doesn't highlight the difference though.

Leaky Nun

@Dennis on mobile, which message are you referring to?

feersum

10:36 PM

Mathematica: (a=#~IntegerDigits~2;Min[Tr[a],1+Tr[1-a]])& (Disclaimer: could be totally wrong)

Dennis

@LeakyNun Square vs second power.

Liam

can answers still be non-competing on questions that scored on a "per-language" basis?

Rohan Jhunjhunwala

@Dennis how do permalinks work on TIO?

feersum

Yep, it's totally wrong.

Rohan Jhunjhunwala

I know this may seem silly, but if you are low on space then can't permalinks simlply encode a compressed version of the source right into the url?

Leaky Nun

10:38 PM

@Dennis no me importa, es mas golfy

Dennis

@RohanJhunjhunwala That's what I'm doing atm.

Rohan Jhunjhunwala

@LeakyNun I hope you you aren't responsible for making medical equipment. en.wikipedia.org/wiki/Therac-25

@Dennis ok, my bad

trichoplax

@RohanJhunjhunwala you too, huh? I thought I was being original suggesting that too ;)

Rohan Jhunjhunwala

:)

trichoplax

What?? Mobile chat doesn't have a starboard? How am I supposed to tell if I'm saying the right things?

Leaky Nun

10:45 PM

@Dennis any algorithm?

Geobits

@trichoplax Ikr? A constant annoyance, having to navigate to the starred page.

Rohan Jhunjhunwala

@Dennis this may be another silly suggestion, but does the algorithm for compression depend on the language used. For example Jelly has a one byte per character code page (even though the utf-8 may be more than one byte). Certain languages only ascii characters, so you could only store 7 bits of entropy per character.

trichoplax

I just switched to desktop mode. Now I can read the starboard by holding the mobile screen against my eye

3

Rohan Jhunjhunwala

I took the starbait. You got a star (only so you can test the starboard)

trichoplax

I can see it :)

Rohan Jhunjhunwala

10:49 PM

lol

trichoplax

I can read chat fairly well in landscape mode, and see more than one entry on the starboard in portrait mode.

Sp3000

@LeakyNun Probably completely wrong, but f=lambda n:n and(n%2and-~f((n+n%4)/4)or f(n/2))

Leaky Nun

@Sp3000 btw i PR'd some optimizations, you might want to see

does it give 3 for 2014?

Sp3000

Also not sure if correct: f=lambda n:bin(n^3*n).count('1')

(These both give 3 for 2014 and seem to be correct for the first 100 results - fyi I'm lazy and ripping off A007302, assuming that's the right sequence)

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