@ConorO'Brien Indeed

WTF? Chrome thinks my last challenge is german, and tries to translate it for me.

lol

2 Google errors in 8 messages. The world is crashing

Can you imagine what would happen if google were to inexplicably stop working?

The streets would run red, and everybody would lose their minds.

> A brief outage by the search engine Google led to a mild panic about the end of the world.

@HelkaHomba How much money do you think that cost Google?

anyone know ruby in here?

@ConorO'Brien a little

this gives the following error and I have no idea

array.rb:12:in `pop': no implicit conversion from nil to integer (TypeError)
        from array.rb:12:in `pop'
        from array.rb:33:in `<main>'

ignore get, it's still in progress

What are you trying to do? Wouldn't that create an infinite recursion?

no? because super refers to the array (parent) class?

You can seriously name a method top=?

Oh, I never got that far with ruby

@ConorO'Brien What if you just call "super" (no "pop")

@feersum yes. it refers to the definition of top, like (Stack.new [2, 3]).top = 45

@DJMcMayhem same error

It's just a guess that I got from this answer:

It seems like the base class (array) isn't being constructed correctly

ohhhh

I'm trying to find the easiest way to do a non-linear recurrence relation (/shift register) in BF.

What if you write n = 5 and then super. Will it forward the original argument or the new value you assigned to n?

@feersum thanks so much :D

def pop(*args)
    return super if args.empty?
end

this works

and then I just use args[0] later on as n

@El'endiaStarman thx for the playlist, has enough rotating songs to not get dull

@ΛεγίωνΜάμμαλϠΟΗʹ Glad to hear that! I typically end up adding a new song every week or so.

what's the name of that ID for identifying molecules?

it's like a number iirc

Molecular weight?

no

something similar to a CAS number, but not that

I just refactored my code to try and fix a bug, but it turns out that it was a different bug causing the issue >_<

lol

@ConorO'Brien I know for a fact that I have frequently fixed bugs that weren't the actual bugs I saw. It's mildly annoying and amusing when that happens.

I agree completely :D

When I was first working on V, basically every single thing that could be wrong was wrong. I tried fixing it, but it was like sticking your finger in a damn. I can totally relate.

maybe this is one of the fundamental programmer truths

O_O I just got a 695 byte pyth answer on my intersection challenge.

That's over three times as long as the python answer

@DJMcMayhem he just golfed it to 385. now its completely normal

I want to see the 695 byte version :/

@ConorO'Brien grace period

yeah

its literally the longest answer

It's a new user though

but longer than batch XD

I usually upvote new users unless it's invalid or cheating or something

Really all of the answers are longer than I was expecting. I didn't think that challenge was particularly difficult

I don't get most C++ submissions

(Looking at that C++ one)

@DJMcMayhem it doesn't look so, either. Intuitively, it's just taking the proper sections from an input...

CMC: The intersection challenge with no input. Do every direction, NESW

That one should just be a C solution... it's almost the same except can be golfed further

@ConorO'Brien Yeah, I should try to see if I can win my own challenge with some good ol V

I've done similar before

Although it's much less satisfying to win your own challenge.

@DJMcMayhem pyth.herokuapp.com/…

Wouldn't splitting it into two packed strings (half the top and the horizontal part) and printing it like 1, 2, 1 be shorter?

also did you use zopfli

@Maltysen Great thanks. I was trying to be productive, but now I have to outgolf you. :P

@DJMcMayhem I literally just threw it into zip compression

if it wasn't online, it would be 50 bytes since i wouldn't use the escapes

@DJMcMayhem psst try it in cg: you can use ! to provide constant input to p

@quartata Ooh, that sounds fun. Is there a way to bypass compression yet?

@Maltysen 77 bytes ;_;

No sorry :/

It can be golfed down further, but I'm lazy

@quartata OK. I tried to add that myself and make a PR, but I had a hard time with the libraries.

Which ones?

pip3 install exrex python-pcre

Wall of Hello, World!s courtesy my autogolfer:

+<<+[[<<+>++++>+++>-->-->-<<<]>-]<<<.<<++++.+++++++..+++.<<<.>--.>.>.+++.------.--------.<<+.
-<++<+[+[<<+>+>+++>-->+>+<<<]>--]<<<<.<<<++.+++++++..+++.>>.<+.<<--.>.+++.------.--------.>+.
-----<+[-[<<+>->+++++>->+<<]>-]>.<<<<<-.<+..<++.<<---------.------------.>+.>.+++.>.>-.<<<<+.
--<+++[[<<+>++>+++>->-->---<<<]>-]>+.<<<<<<---.<-..>>>++.<-.------------.>>+.<.+++.<<<.>-.>+.
-<++<++++[-[<<+>->+++++>->>+++<<<]>]<<.<<.>+..+++.<<<<<++++++++.>+.>>+.>>.+++.------.<-.<<<+.
--<+[+[<<+>----->+++++>-->---<<]>]>++++.<<<<<.<<+..+++.>>>.>++++.<<<---.<.+++.------.>>-.>>+.

all 78?

no... all 93. They are garbage.

what happened to the 78 generated one?

I'm trying a couple variations on the recurrence relation theme, to try to break the 78 wall. As you can see, my current approach is not working.

And just now it outputted 2 more length-93 versions.

@PhiNotPi why not just brute force every single one of the 7^77 possible solutions to see which one works? :P

@DJMcMayhem 2^77? I think you mean 7^77

That's what I said

twiddles thumbs

   7^77x
118181386580595879976868414312001964434038548836769923458287039207

that is one heckuva lot of programs

probably less if you enumerated them

A lot of those are invalid and could be skipped

You could also remove the ones with less than 13 dots

And any of them containing -+ or +-

Or []

or <>

Or ><

or ,

we could use this

Or just never generate those ones

except filter no-ops

Hey, look on the bright side. Grover's algorithm can do it in a mere 4 * 10^18 millennium

who?

@ConorO'Brien It's a quantum algorithm.

oh

It probably would be better if you brute forced something like TinyBF then converted

You could probably also filter out the ones that enter am infinite loop. That sounds pretty easy, right? :P

xD

You'd have to use a partial halting problem solver anyways

Very relevant:

Otherwise it woud get stuck on [>+] or the like

I'm starting to doubt the feasibility of this.

@quartata Today's program brought to you by the number 4 * 10^18!

are humans turing complete? :P

they can solve the halting problem, given enough time for an input

Really?

No they can't

Wait, is the halting problem still impossible if the program doesn't take any input?

sure we can

@ConorO'Brien Yes, but only as a species

@quartata couldn't you hand someone a BF program and they could eventually figure out if it terminated or not? (assuming no , in the program)

(hope someone got my joke)

Humans are Turing complete though. In fact it's fairly easy to envision a Turing machine as a human with a pencil a thin paper tape and a sticky note

@ConorO'Brien Tell me if this program terminates:

@ConorO'Brien How?

@ConorO'Brien for simple ones, sure

@HWalters we'll figure that out once if we ever figure out the brain

@quartata don't leave me hanging :/

def catch22(program):
  if (halts(program)):
    while True: pass
  else: return

Given itself as input

@ConorO'Brien Then I'd recommend waiting until you figure out the brain before claiming we can solve the HP

@quartata it halts with an error: halts is undefined

:P

I was talking about BF programs

This remind me of a discussion I had with someone about whether or not the brain counts as a computer. (I had to bail out once she used the double-slit experiment to argue for non-local consciousness.)

@PhiNotPi what's the double-slit experiment? (Asking for a friend)

@PhiNotPi That's actually easy... I would skip the philosophy and just point out that quite literally, computer was a job title before it was a machine

^

@DJMcMayhem a thing in quantum mechanics: en.wikipedia.org/wiki/Double-slit_experiment

@DJMcMayhem Spoopy stuff

@PhiNotPi That's way over my head :/

mine too

@ConorO'Brien fortississimo

That's what it looks like to me

@DJMcMayhem It's simply an experiment that showed that electrons have wave like properties, such as forming the above interference pattern when passed through a double slit, contrary to the once common belief that they were merely particles, like tiny ping pong balls.

Huh. Spoopy

@DJMcMayhem long story short: photons (and other things) act like both waves and particles. Rays of light can (con/de)structively interfere with each other, but it turns out that a ray of light can still interfere with itself even when there's only a single photon.

Pfft, that's nothing. I interfere with myself all the time.

PhitonNotPirticle

@PhiNotPi OK. And what does this have to do with human-Turing machines?

Nothing really.

Cool... first cut golfing fizzbuzz in CPP... 740 chars

@Geobits what just happened with those stars?

I dunno. Sometime stars interfere with each other too.

...and doesn't quite work... forgot to add "modulo shifters"

Hard CMC: Given a list of three words append such to one, so to another and very to the last such that such does not follow a noun, very does not follow an adjective or adverb and so does not follow an adjective. Return a falsey output if it can't be done. Using the Internet for the part of speech lookup is fine

Brain, 0 bytes: [awaiting input]

@quartata how do I convert a tf2 .dem file to a viewable video file, like .avi or something?

@Geobits [what, disallowed, silly]

Yesterday I tried running a simulation of the human brain on my computer, and my computer froze up.

@ConorO'Brien You can do startmovie but there are a few pitfalls:

@quartata false

@PhiNotPi Was it drinking an Icee too fast?

Default is uncompressed which outputs a bunch of Tegra pictures as well as a wav file containing the audip. Ths will maim your hard drive.

what would you suggest as an alternative?

Second is AVI but because of Valve time it doesn't support multi chunk AVIs (standard came out in 1996) meaning files can't be >1Gb

@ConorO'Brien Screen record the playback with xsplit (free)

Third is MP4 which looks awful

pick your poison

Or I think even Windows has a crummy screen recorder

@Geobits Der I was thinking of silly as the noun...

English is way too accommodating to make it easy. Nouns become verbs become adverbs become adjectives become nouns :/

Yeah, hrmm..

@quartata how might I do this?

Play the demo then run the command. See help startmovie for the syntax

] help startmovie
"startmovie"
 - Start recording movie frames.

fantastic

startmovie compression_method I think

This will take your computer hostage fyi

Hmm... How do I split an 18x6in. PDF page into two 8.5x11in. pages for printing?

(on Ubuntu)

@ConorO'Brien oh shit I was wrong it's startmovie filename methd

kill tf2 now

good thing I haven't done anything yet :P

@quartata Don't just kill TF2, burn it with fire

@ΛεγίωνΜάμμαλϠΟΗʹ ಠ_ಠ

MP4 is h264

dont specify a method for uncompressed

Does anyone here besides me ever hack in pure c preprocessor?

There are a couple people I've seen using it on main, but I don't hear much about it in chat, no.

More specifically, see any additional golfing opportunities here? coliru.stacked-crooked.com/a/432b7bccaac6d8ed

Hmmm... darn it... I see one. Dispense with everything and just preprocess the result directly. Given that I don't think it's worth posting.

@ConorO'Brien that just says that the probability of a particle existing somewhere at time t adds up to 1

@Maltysen fantastic, glad you can read it >_<

@ConorO'Brien no, I really don't know quantum mechanics, that one image you posted was the only one that didn't contain any spooky quantum mechanics math in it, just a standard triple integral

happy coincidence I guess :P

> standard triple integral

I have enough problems with the standard single

@ConorO'Brien it says "all space" under it, which means you are integrating over all space

which makes sense because space is 3-d here

Multiple integrals are just applying a single integral repeatedly, typically across different axes.

integrals are just the inverse of derivation right

@El'endiaStarman not really. thats what fubini's says multiple integrals are equal to, but they are defined as actually integrating 2d/3d objects (e.g. the dV up there)

More or less, yes

@ConorO'Brien and the fundamental theorem of calculus say that by awesome magic, that lets you add up areas under a curve (or add up other things)

yeah I don't know what that means

@Maltysen Indeed. I was speaking more to the practical/computational side of it.

@ConorO'Brien If you know the exact distance a car has traveled at any moment in time, you can figure out exactly how fast it was going at any moment in time. Conversely, if you know exactly how fast a car was going at any moment, you can figure out exactly how far it went by that time. This is the fundamental theorem of calculus.

:32253059 To my untrained ear, that sound like something that came from a bad markov generator.

Aww it's removed

@Geobits ...yeah, Elendia's explanation was about a billion times better

@El'endiaStarman yup this is why I prefer pure math to calculus. that makes zero sense :P

@El'endiaStarman It's also how inertial navigation units work, except that even the best of those accumulate drift over time :(

@Geobits Yeah, blame measurement error for that.

@Geobits crossing my fingers for tango

tango?

@ConorO'Brien Uh, what? Calculus isn't pure math?

@El'endiaStarman Yeah, we used to cross-ref with GPS every so often to keep them straight.

@El'endiaStarman no? it's applied math?

Calculus is much broader than pure/applied math.

Ironically, according to QM, if you know the exact distance a car has traveled over time, you have no clue how fast it's going

It's all about rates of change, which you can and will find practically everywhere.

@Geobits google's new standard for sensors on mobile devices.

@El'endiaStarman maybe I'm just tired, then :P

Oooh, I'll have to look into that.

@Maltysen ^ Agreed with Geobits. Though I'm lazier, so...link? :P

@HWalters Yeah, but the exactitude required there is more than we can achieve. :P

get.google.com/tango is the actual vr project they are using it for, and they are asking phone manufacturers to match specs that will let it work

"tango enabled smartphone"

Dammit google, I don't want to watch a commercial for it. Explain it in text form :(

@ConorO'Brien ignoring the part about inverting derivatives, a definite integral is finding the area under a curve

@Maltysen oh, is that it?

fundamental theorem of calculus says that this can be found by inverting a derivative

@El'endiaStarman was explaining why this works

the example just confuses me :/

@Geobits scrolling down has a little text

@ConorO'Brien let's say you had a graph of snowfall rates for the past 10 hours

the total snowfall would be the area under the curve right?

@ConorO'Brien Hmm, try graphing it? Alternatively, try rebooting first. Which may take several hours.

@Maltysen I think I'm going to reboot. conor.exe is taking a long time to respond.

@ConorO'Brien no, you're overthinking this

okay

@ConorO'Brien if the snowfall was falling at say, 10 ft/hour at t=0 and 7 ft/hour at t=1, etc.

ok

you would have to just add up the stuff to get the total snowfall

right

well...

but that isn't a curve?

10*1 hr+ 7* 1hr, but obviously more granular

@ConorO'Brien yes, that's why you need infinite presicion, and that's called a reimann sum, but no need to consider that now

@Maltysen gotcha

do you see how its just the total area under the curve?

ye

but total snowfall is trivialy also just your starting snowfall minus your ending snowfall

like you started with 20 in and ended with 50 in

k?

ok

@ConorO'Brien now, can you see how the rate of snowfall, our original function, is just the derivative of the total snowfall?

oh

aka, the total snowfall function can be considered the inverse derivitive of our original function

I see

that makes a lot more senes

now, if you generalize this, you get that the total area under our curve is the difference of our "inverse derivitives"(actually called indefinite integrals) from the starting and ending points of our range

this is the 2nd fundamental theorem of calculus, which says integration cancels out diffrentiaion

its a corollary of the first, which says that diffretiation cancels out integration, but that's harder to explain without reimann sums

I think now he's ready to use integrals to find the length of curves and integrate along paths

I see

thanks :D

I really have to go now, bai

bai

@HWalters haha

@Dennis Could you pull brain-flak? While you're at it, the wrapper might need some tweaking. Could you change it to ruby brain_flak.rb [args] -f input_file source_file?

@DJMcMayhem Done and done.

Thanks

@DJMcMayhem I don't think this is correct

No, it's working.

@ConorO'Brien you are familiar with ruby right? I need ruby halp >_>

My bad

@EamonOlive That's ascii input, not output.

@Downgoat for what

TIL n ^ 2 == sum(range(0, n - 1)) * 2 + n

@Downgoat what's your problem

@DJMcMayhem Yeah, which is 1+3+5+7...+(n*2-1) (the more common form)

@ASCII-only what is ! postfix operator do?

@Downgoat Just for readability, indicates that the function modifies the object

wait so its not an operator??

Not really

@ASCII-only How does that work out? I must be missing something

I mean, I already knew that, but I don't see how the two forms are related

A lot of the time there are things like downcase and downcase!, only the second one modifies the object

@DJMcMayhem range(0, n - 1) * 2 = 0, 2, 4...

add n is the same as adding one to every one of those terms

:O

^^^ Note: that's pseudocode

> Advanced Placement Computer Science A (also called AP Java)

;_; what did I sign up for

@Downgoat wait really

yup

Java != CS A

^

I don't even know any java ;_;

Even with JS' implicit type casting

that would be okay if we're using IDE... but we have to write JAVA code by HAND

gaot is vrey apprehensive

@Downgoat I learnt Java like 2 weeks ago to learn Android (with an IDE though)

@Downgoat You'll be fine, just use an IDE most of the time, eventually you'll remember to put every single semicolon in by hand

@ASCII-only but the thing is they are so many methods and classes how do i remember all of them

I mean luckily it's quite similar to JS

but still... ;_;

@Downgoat You only need the important ones

yah

boxed primitives (e.g. Integer), String, arrays, ArrayList maybe, HashMap maybe

@Downgoat C-like?

I meant like for abstract class kinda thing

@Downgoat If you mean headers, they're automatic

Look up abstract classes

@DJMcMayhem ... c requires functions to have prototype

@Geobits i know thats why i edited message to say "yah"

@Downgoat Java has abstract class (basically child class inherit to force it to implement)

@Downgoat ???

@Downgoat ... In my head I was thinking template. ._.

Now I feel dumb