The Nineteenth Byte

@AlexA. Anyway, I was thinking of making an "Alex challenge" since you hit 10k but I was hoping you'd actually change your avatar for more inspiration

Alex A.

Aw, but I finally found a bird painting I like.

More than this monstrosity ^

Doorknob

That looks like one of those inkblot thingies.

PhiNotPi

Somebody I know paints her own bird paintings to use as avatars.

Alex A.

@Doorknob A Rorschach Test?

Doorknob

12:44 AM

Rorshahclkwawwaaaaashh, yeah.

(I can never spell that correctly.)

Alex A.

@PhiNotPi Cool! For what sites?

Calvin's Hobbies

@Doorknob I see a furry blue fork

PhiNotPi

Wait, apparently she changed her profile to be a selfie.

Nevermind then.

Doorknob

@PhiNotPi Just like mine!

Alex A.

@Doorknob An inkjet printer?

Zach Gates

12:46 AM

LOL

PhiNotPi

I would believe an inkjet printer.

Alex A.

Don't trust their tax advice though.

PhiNotPi

Or their automatic ink renewal subscription service.

Calvin's Hobbies

@Doorknob You were great in Beauty and the Beast

(Or was that Alice in Wonderland? Shucks)

Zach Gates

I believe he played many roles in both

Alex A.

12:50 AM

@Calvin'sHobbies Are you saying that Doorknob is a beautiful woman or a hairy beast man?

Doorknob

Both.

PhiNotPi

Beautifully hairy beast woman-man.

Zach Gates

A beautiful, hairy, feminine man

PhiNotPi

My phone just detected a wifi network named "this is not a router"

Alex A.

Haha

Doorknob

12:56 AM

I found a password-protected wifi network once called "no free wifi for you"

quartata

It should have been This is not the router you are looking for.

Alex A.

My wifi networks are Integral Domain and Principal Ideal Domain because I made them while I was studying abstract algebra.

PhiNotPi

For added context, we aren't allowed to put wifi routers in our dorm rooms.

Doorknob

My phone's hotspot is called The Sub-Etha Net. :P

Alex A.

Aren't hotspots the things that dogs get when they lick themselves too much in one spot?

PhiNotPi

12:57 AM

No, it's the area on the phone that heats up during heavy use.

undergroundmonorail

my network is just "monorail" but the one at home is pretty-fly-for-a-wifi

mbomb007

1:08 AM

@quartata It's another RPG like DND.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:20 AM

quick question if a programming language can be shown to have a surjective function mapping it to a Turing-complete language, would said programming language also be Turing complete? Is this the same thing as the language being reducible to the Turing-complete one?

(i.e., the commands in language X can be mapped surjectively to BrainF.)

PhiNotPi

I believe so.

Doorknob

If you can interpret a Turing-complete language in X, then X is also Turing-complete.

PhiNotPi

Because every possible algorithm in BF would have a corresponding program in language X.

Doorknob

(Same goes if you can convert a program in language X to BF and vice versa.)

PhiNotPi

Converting X to Bf doesn't mean anything, it's about converting BF to X.

Doorknob

1:22 AM

Yes, that's why I said and vice versa. I suppose being able to convert from X to BF isn't necessarily a requirement.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Thanks you two. Saves the trouble of proving my language is Turing-complete the long way around.

PhiNotPi

A surjective mapping would mean BF to X is always possible, so it would be Turing-complete.

@CᴏɴᴏʀO'Bʀɪᴇɴ Like Doorknob mentioned, you could also write a BF interpreter in your language X.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@PhiNotPi And that would also prove it's TC-ness?

PhiNotPi

yes

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Doorknob Thanks for that tip ^_^ would be a great test run

New Main Posts

1:30 AM

0

Q: Make a (software) modem!

Objective Design a modulator/demodulator pair to accurately transmit data as quickly as possible over simulated plain old telephone service (POTS). Steps Generate some random (/dev/random or the like) data that will take 3-4 seconds to transmit Modulate the data with your modulator to produce...

PhiNotPi

We should have a "Make a (hardware) modem" challenge.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@PhiNotPi chip golf, anyone?

PhiNotPi

Like the real-world version of TIS-100

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I googled it. My mind exploded three seconds into reading the wikipedia entry.

PhiNotPi

Does anyone know exactly what chips Wozniak used in the process of his golfing?

It says TTL chips, but there's a ton of those.

If we can figure out the details, we can make a challenge out of it.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:39 AM

@PhiNotPi I know what I'm doing tomorrow ^_^

Zach Gates

The first answer in Symphony! :D The shortest I could come up with, at the moment.

Doorknob

I've been waiting for a challenge to answer in Macaroni for most of the afternoon >_>

Zach Gates

Do the hello world challenge, haha

Doorknob

print "Hello, World!"

Too boring. :P

Nick T

@Doorknob what is unclear?

Doorknob

1:50 AM

I have no idea what the challenge is asking me to do. -_-

Nick T

I linked the Wikipedia modem page...

basically you need to take some digital data, turn it into analog, then back into digital

Doorknob

> A modem (modulator-demodulator) is a device that modulates signals to encode digital information and demodulates signals to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used with any means of transmitting analog signals, from light emitting diodes to radio.

What... does that mean? O_o

Nick T

back in my day...56k, yadda yadda...

Zach Gates

@Doorknob Still worth posting :P

El'endia Starman

@Doorknob Modulation is changing either the frequency or the amplitude of a signal. You can somewhat arbitrarily pick two frequencies/amplitudes to be 0 and 1 respectively. Then you can transmit digital information with analog signals. Modulation is turning the digital into analog (encoding) and demodulation is turning the analog signal back into digital (decoding).

Zach Gates

1:55 AM

I would definitely enjoy seeing it on this question. @Doorknob

El'endia Starman

Incidentally, the two main types of radio stations? AM - amplitude modulation and FM - frequency modulation.

Nick T

@Doorknob look at/listen to the example notebook

nbviewer.jupyter.org/github/nicktimko/pots-sim/blob/master/…

Calvin's Hobbies

@NickT Doesn't modulating the data to be as dense as possible count as a form of digital compression? (that you disallow) Do you just mean no built-in digital compression algorithms?

feersum

@Calvin'sHobbies Digital compression means transmitting fewer bits to transmit the same information

Increasing the density means to transmit bits faster

Nick T

2:13 AM

@Calvin'sHobbies the point is to make optimum use of the channel which has limited bandwidth

feersum

What seems to be missing is an error rate

Nick T

0

I maybe should relax that if people are transmitting extremely quickly

feersum

The testing protocol involves some random noise doesn't it?

Nick T

yes, but you can fix the seed

feersum

So how could the error rate be guaranteed 0?

other than optimizing against a specific seed

Nick T

2:17 AM

True, the BER will never be exactly 0 given randomness.

1 out of 1000 bits?"

feersum

ok

Nick T

Having to implement ECC probably outside the scope of the challenge

because that tends towards the digital realm again

Nick T

4:00 AM

Is there some way to do some hacky file hosting on a free Heroku instance? Was wondering about hosting the audio clips, but Heroku seems fairly restrictive for better or worse

Teh dataz! (980 bps in an awful-sounding file) astroeq.co.uk/FileDump/qpsk.wav

Nick T

4:17 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ code golfing a breakout game would be cool

New Main Posts

6:12 AM

0

Q: Golfing Strings in Your Language

I have always failed to give an answer for kolmogorov-complexity challenges which require string compression, the main reason being that I don't know to use string compression tools as effectively as I should. For this reason, I have posted this question. Unlike my other tips questions, this is ...

code-golf kolmogorov-complexity tips

0

Q: Implement "tac": Print lines from a file in reverse

Between the kitten question and seeing this question at U&L about some sed magic, how about implementing tac? Objective Implement a program that will reverse and print the lines in a file. Input A file, provided as a name or via standard input Output The lines, reversed, to standard o...

code-golf string

Martin Büttner

6:51 AM

@feersum I wasn't, but I'm sure you noticed that ;)

feersum

@MartinBüttner I wanted to ask how I'm supposed to use Retina

I couldn't get the chess pawn program to work

I used -s

randomra

has there been anything similar: "solve a task with spaces at prime positions in the code"?

it wouldn't be interesting for golfing languages as they can ignore spaces, but maybe the constraint can be twisted a bit

like removing any continous group of spaces in the code should break it

feersum

7:46 AM

@MartinBüttner so do you have any idea why I might get 0 for the first test case on that question?

Martin Büttner

8:33 AM

@feersum Mono or .NET?

feersum

.NET

Martin Büttner

Hm, try using the build from the replace branch instead of master

jrenk

0

Q: Password in Proxy Settings gets changed automatically (from cache?)

I want to change the Proxy Settings on my Macbook Air. But somehow the old password is stored in some kind of cache. When I change the settings and save the changes the password is instantly replaced with the old one. Can I delete this cache where the old settings come from or restrict that it is...

password settings proxy

Does anyone have an idea?

feersum

@MartinBüttner still not working

Martin Büttner

Weird, I'll have to look into that later

Optimizer

9:10 AM

@jrenk umm, wrong chatroom?

minxomat

10:10 AM

You know the situation is bad when the Canadian government warns people about traveling to Germany...

New Sandboxed Posts

12:20 PM

0

A: Sandbox for Proposed Challenges

Title tbd code-golf chess Objective The black pawn wants revenge. Plot out its last attack. Rules The pawn starts at the bottom and moves upwards. Maximise points taken, indicating the path with X. Pawns are 1, bishops and knights 3, rooks 5, and queens 9. There won't be any kings in the inp...

feersum

Does anyone know how to skip a target when using make?

I'm unable to google it because 'make' is too common of a word

Geobits

1:00 PM

I think you can use -W filename, but I may be wrong.

Optimizer

@feersum search 'make out a file'

Rainbolt

I read that "make out with a file" at first

Optimizer

creep

Geobits

That file is so small, I can barely make it out.

Optimizer

I think that is the reason -W is also not making it out

Rainbolt

1:05 PM

MTG appears to have slowed down

Now may be a good time to edit some of my older answers that even I can no longer understand

PhiNotPi

Magic: The Gathering slowing down?

Geobits

Maybe some more card-drawing instants would help speed it up a bit?

PhiNotPi

Major Teague Gaming

Geobits

Unless it's a land issue.

Rainbolt

Wow wrong chat room again

Wow. I forgot about this question: boardgames.stackexchange.com/q/14851/6692

Geobits

1:08 PM

@Calvin'sHobbies 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40... I can count :P

Rainbolt

Be honest - did you google "first hundred integers" or write a program to print them or actually type it out?

Geobits

Typed it. Without using the numpad :)

Rainbolt

Seems like it'd be easier without the numpad

Geobits

If I'd written a program I would've just pasted until post size limit.

Optimizer

it won't be

minxomat

1:13 PM

We just passed 4000 questions \o/

Rainbolt

1:27 PM

Mine says 3,987 questions

Geobits

/questions is always a bit lower than the front page for some reason.

sweerpotato

Hello!

Geobits

!ollɘH

sweerpotato

What do you think of a reverse fizzbuzz challenge?

Meh, apparently existed already

..sort of

Rainbolt

Hǝllo¡

Weird. The e and the o sank

sweerpotato

1:43 PM

I want to compose a fun challenge

Geobits

Composing is always a challenge for me. I can play well enough, but I don't know enough theory to write music well.

minxomat

Then you should stay away from fizzbuzz @sweerpotato

sweerpotato

Yes @minxomat

Not fun creating similar challenges just for the heck of it

@Geobits I play drums so I just blob crap on a paper

Geobits

Percussion notation is, and probably always will be, a complete mystery to me.

sweerpotato

whut

I actually switched to drums because it was way easier to read notes

minxomat

1:48 PM

I really respect (good) drummers. Mainly for the multitasking :) . Been playing the piano for about 8 years...

Geobits

Well, I pretty much get how it works, but I've never successfully been able to read it at even half-pace.

flawr

@minxomat Whaat?

minxomat

?

sweerpotato

I've been playing drums for 8~ years

Reading is harder while playing

I generally memorize the pattern and try to play by ear

Geobits

That's how I do guitar for the most part.

sweerpotato

1:50 PM

Yeah!

Well, some songs you just have to practise

minxomat

Oh I hate reading sheets. I try to memorize as fast as possible and dismiss the sheets.

sweerpotato

Mainly absurd metal patterns

flawr

@minxomat What is up with the canadian govmnt and germany?

sweerpotato

Meshuggah :<

minxomat

@flawr They just posted a tourist warning about radical gangs in east germany.

Bad timing...

I mean, it is true, but it's just really bad timing.

sweerpotato

1:52 PM

TesseracT - Nocturne Drum Cover by Troy Wright

►

Stuff like that

Bass drum wrecks me

flawr

@minxomat Can you give me a link/something? Google was not my friend today.

sweerpotato

I can handle the arm part, but haven't found the pattern for the bass drums yet

minxomat

> Extremist youth gangs are a threat, particularly in some smaller urban areas and in parts of former East Germany. Gang members have been known to harass or attack individuals because of their race or for looking “foreign”.

Official source: travel.gc.ca/destinations/germany

Article about that: panteres.com/2015/09/30/…

flawr

@minxomat thanks!

Zach Gates

What's up

sweerpotato

1:55 PM

Pondering why I'm bad at drums

:X

Biggest reason is probably lack of practise :~)!

Optimizer

^

flawr

How long have you been playing so far?

Practize?

8 years

9 years

1:56 PM

Well.. sort of

minxomat

Are you solo or do you do the "band" thing @sweerpotato ?

sweerpotato

Active playing maybe 4 years

Solo 100 %

I just want to play hard songs, and when I can't I get pissed off :|

minxomat

Being pissed off is the best motivation :D

sweerpotato

I've been practising Spasm a lot

But this solo kills me completely:
https://www.youtube.com/watch?v=MlCepFIiAj0

Better stick to coding

flawr

The internet is always a bad thing to compare yourself to.

Zach Gates

2:02 PM

I'm offering a 50 rep bounty for anyone who can beat my "Hello, World!" in Symphony :P

sweerpotato

Well, I don't necessarily compare myself with anybody - I just get pissed off because my mind know what to do but my body won't follow :|

It's not physically impossible to play the songs

I should make a programming language

PhiNotPi

@ZachGates Shorter, character-wise? Or number of commands?

flawr

I used to play a woodwind instrument and when I had a fast passage I was always told to practice it slowly first and then get progressively quicker. But usually I could never get to the speed I was supposed to play at, until I discovered another technique:

Just practise e.g. the first three notes at full speed, and at every other repetition and one or two notes more, but stay at full speed from the beginning.
This technique is quite tiring/not very exciting but brought me quite a bit faster to my goal.

sweerpotato

Yeah, good tip

I usually do something similar

Zach Gates

@PhiNotPi Number of commands

sweerpotato

2:08 PM

I should unpack my drumkit

flawr

I do not know, perhaps you get taught this in some places, but my teachers never told me to do it that way....

sweerpotato

I've had three teachers

The first two just told me to play songs and we jammed

The third (real) teacher just told me to practise double snare

"Do this and eventually you'll become fast"

Geobits

Hmm, whenever I was "close-to-full-speed" for something, I'd play along with a recording. I'd inevitably fail to keep up at some point, and pick it back up on the next measure or so. Eventually the fail points dwindle away.

flawr

A metronome can help too.

But really, after a few years playing I did not make any real progress anymore, just perhaps the last year until I had to quit.

PhiNotPi

@ZachGates There's no stack manipulation commands that I see. (duplicate, rotate, etc.)

Zach Gates

2:12 PM

Nope

It was created yesterday, though

PhiNotPi

Well, that means that it will be a lot easier to prove the shortest program.

Zach Gates

Why emphasize "prove"?

It should be pretty easy to beat mine by 1 command

Probably more

PhiNotPi

With most programming language, proving that a program is the shortest possible is really hard.

But the lack of stack manipulation means that the abstract syntax trees of the program are really simple.

What's the rules for Intermission and the curtains?

Optimizer

during a movie?

Zach Gates

@PhiNotPi Curtain Up must be the first line, and Curtain Down must be the last.

"\nIntermission\n\n" separates the Acts (once you output a value, you can't perform another Act without an Intermission)

PhiNotPi

2:21 PM

I don't see them mentioned in the ReadMe

Optimizer

They are mentioned in the PlayMe instead

PhiNotPi

What's the rules for where they must be placed?

okay

Zach Gates

@PhiNotPi I just added it to the readme

Curtain Up
Symphony No. 6
Symphony No. 30
Symphony in B-flat major
Oboe Concerto in C major
Curtain Down

That outputs an H to the console and exits.

It's the equivalent of print(chr((6 + 30) * 2)) in Python.

PhiNotPi

Does outputting pop from the stack or look at it?

flawr

Box Clever - Simon's Cat

►

Zach Gates

2:32 PM

@PhiNotPi Pops from the stack. No commands can be executed in an Act after an output command.

There is only ever one item on the stack.

PhiNotPi

Then it's not really much of a stack.

Geobits

Maybe it shouldn't be called a stack?

Zach Gates

It'll be more of a stack eventually.

I've only spent about 6 hours on it so far

PhiNotPi

Also, what does this do, from your Hello World.

Symphony No. 27
Symphony in D major
Oboe Concerto in C major

Intermission

Symphony No. 23
Symphony in D major
Symphony No. 16
Oboe Concerto in C major

Zach Gates

I'll be back in a bit. Going to Gym.

PhiNotPi

2:34 PM

Should correspond to the ll but it's two different sequences of commands.

Zach Gates

I'll take a look when I get back

sweerpotato

oo just thought of a challenge

flawr

2:50 PM