The h Bar

Phase

12:00

I think the best tip if anyone wants to actually try to enjoy their music is to never watch the music videos

Because even the good songs have atrociously cringeworthy videos

Balarka Sen

lol

Phase

@BalarkaSen I'm gonna recommend a slightly happier song from an Artist I've been enjoying recently, it's a completely different vibe tho

Secret

(Possible dehydration + sleepy episode)

Balarka Sen

@Phase Listening

Secret

Imagine that you felt dizzy and your visual scenary zoom in front of you as if you are seeing an image enlarging on a screen

Phase

12:04

@BalarkaSen and if that's too cheery, try one of his other, slightly less cheery songs

Secret

It felts to me had I not drink water in time and the view zoom too far in, I will then have black out

Phase

I've got a near infinite collection of depresso music : P, if you enjoy that kinda stuff, I also recommend Elliott Smith

Secret

in Mathematics, 5 mins ago, by s.harp

> all the constructions in homotopy type theory are stable under isomorphism, so if you prove a property of (let's say) a group, then this property is true for any isomorphic group. This is not true in ST and this problem is usually swept under the carpet.

Balarka Sen

@Phase This sounds really good. (It's true I don't listen to upbeat songs too much but that's my pretentiousness)

I like Elliott Smith

Phase

@BalarkaSen Nice, he usually makes more depressing songs though : P

Nice!

Secret

12:06

@ACuriousMind you might be interested in s.harp's string theory related question

Phase

Got a favourite album?

Balarka Sen

Nope. Want to recommend?

Phase

Actually, you've probably listened to a fair bit of Elliott so instead, have you heard of Heatmiser?

Balarka Sen

No, actually I haven't listened to him systematically. I am not super into depressing music, by the way. I dabble in weird, gothic music more

I'll check Heatmiser out

Phase

Oh fair,

Heatmiser was a band Elliott was in before

A lot of his songs there were remade in solo projects of his later on tho

Balarka Sen

12:09

I see

Phase

@BalarkaSen like this, it was originally a song he made for Heatmiser but he redid it solo years later

Balarka Sen

Thanks

Phase

I have a lot of bands I like that most people I try showing irl dont like :L

Balarka Sen

Most of my favorite material are disliked in general

Phase

If you got time to listen to a seven minute song, I can't recommend songs like this and also this enough

damn, send me some

Balarka Sen

12:17

@Phase I like this a lot

Phase

Which one? : P

Balarka Sen

the song you linked

Phase

I've linked 2 since the last elliott one x)

Balarka Sen

the Tool one

I'm still listening to it but this seems to be my kind of thing

Phase

Both are by tool but nice x) tbf I did go back and edit it after,

to add the second song

and nice! I love Tool, I originally found out about KGLW by trading tool song links for KGLW song links : P

Balarka Sen

12:19

Oh, wow, the edit didn't appear on my chat until I reloaded

Phase

Spooky

Balarka Sen

@Phase lolol

it was Bernardo who first told me about KGLW

Phase

was it in return for books? : P

Balarka Sen

haha no. we share some common music tastes

I like Talking Heads, eg

Phase

I'll link one more thing because i feel like I'm linking way too many songs, feel free to share some of yours though! This one is from a band a guy from game grumps was the singer in : P

Balarka Sen

12:25

Well I like a lot of things which are somewhat musically disjoint. 1.Outside is high on my list of favorite albums - listen to this or this. I have been really into Scott Walker recently - try this for an easy going Scott song (his later albums are wild).

I also like black metal bands like Ulver and Drudkh (Autumn Aurora is a great album - absolutely try this)

I have been into the post-rock side of the world lately.

Phase

Bowie is gold

Anonymous

@JohnRennie Sorry to disturb, but I'm still confused about this: chat.stackexchange.com/transcript/message/41350665#41350665

Balarka Sen

yeah but people don't like 1.Outside

Anonymous

1 hour ago, by Blue

@JohnRennie Alright. Then can't we directly call the invoke the compare function from within the quick sort function ? By writing compare(a,b); where a and b are the int parameters. What is the need of passing a pointer to compare() to the quick_sort() function beforehand?

Phase

@BalarkaSen people are elitist knobs

Balarka Sen

12:27

lol

so you have listened to it?

Phase

I even like Earthling : P

yeah

Balarka Sen

Oh wow great

Earthling is my second favorite

Phase

Wow

An actual human being who also likes Earthling

Nice!

Balarka Sen

Well have some more Scott Walker then - youtube.com/watch?v=r5hvHEBLNpI

and this youtube.com/watch?v=FbpBxXEPQow

John Rennie

@Blue Suppose I want to have my sort function handle three different kinds of data in my program e.g. sometimes when I call it I want to sort strings, sometimes ints and sometimes a weird struct that I've defined. I can't write three different compare functions all called compare.

Balarka Sen

12:29

@Phase I know right? Nobody liked it

I don't know why

Phase

Scott Walker is a strange experience

It's like gothic opera singing

Balarka Sen

I love it

You can see him transitioning on "Climate of Hunter" - also a masterpiece imo

here

he isn't doing the opera schtick there

Anonymous

@JohnRennie Sure. But why not name the compare functions as compare1, compare2, compare3, and so on, and call the necessary compare function from within quick sort (using switch case)? Are you saying we can't detect the type of a certain variable (i.e. whether it is of a specific user defined type or not) from within the quick sort function?

Phase

@BalarkaSen ahhhhh it makes sense

with this instrumental set up he's like a calm Elvis

Balarka Sen

yup

Phase

12:32

speaking of Elvis, I like this quite a lot

The song is already great, and every cover seems to have so much personality

Especially this lmao

John Rennie

I want to use one standard quicksort function in all my apps, so I don't have to rewrite it whenever I write a new app. So the quicksort code has to work with all possible data types including new ones I define in my app.

Phase

AAHAHAA I DIDNT EVEN REALISE SOME OF HIS LYRICS WITHOUT THESE CAPTIONS

Balarka Sen

@Phase I don't dislike Presley

Phase

Im not that big a fan, tbf his cover of My Way is my favourite thing from him

Anonymous

@JohnRennie Oooooo! Finally understood. So when I make a new user-defined datatype, I can just pass it's pointer to the quick-sort function without having to modify the original quick-sort function

John Rennie

12:35

Exactly!

But that's just one example of where function pointers are useful.

Balarka Sen

@Phase I also like other classic rock musicians, eg Peter Gabriel

Phase

Never listened to him

got a recommended song?

Anonymous

@JohnRennie Hmm, my book doesn't deal with function pointers well :/ They just mentioned it briefly. Do you know any source which deals with this properly?

John Rennie

Function pointers are a somewhat advanced topic because the type declarations required for them is quite complicated.

That's probably why your book skips over them.

Balarka Sen

@Phase If you want to listen to something pop-y flavored, try "Red Rain", which was a commercial hit. I like his less commercial stuff, eg this

Phase

12:38

@BalarkaSen I like how if you switch the order of words "classic" and "rock", you get something exponentially camper

Balarka Sen

Melt is a great album by the way

Phase

I like this a lot

Anonymous

@JohnRennie Yeah, probably :/ I actually haven't looked into many C books tbh. I was occupied with the algo books. Is K&R more thorough?

Anonymous

In Java, objects make things much simpler :P

Balarka Sen

@Phase lol

Anonymous

12:40

No pointer business there

Anonymous

lol

Balarka Sen

Not big into punk rock, myself

John Rennie

@Blue K&R is a very short, very concentrated treatment of C. It's probably not the best book for beginners.

Anonymous

@JohnRennie I see. Would you recommend anything?

Mr. Xcoder

$\propto \dfrac {\text {Cross-Sectional Area}}{\text {Volume}}$... For cylindrical / rectangular / straight bodies $\frac{1}{h}
\propto \dfrac {\text {Cross-Sectional Area}}{\text {Volume}}$ whereas $h$ is height :P

Phase

12:42

@BalarkaSen I think there's only really one band I've liked where as an older version of me I've gone: "why"

John Rennie

C is such a simple language I'm not sure you need a book ...

Balarka Sen

@Phase Which?

Mr. Xcoder

So nothing

Phase

@BalarkaSen this

John Rennie

C++ is more complicated, but the C++ books I learned from are all decades old now.

Mr. Xcoder

12:43

No idea

18 secs ago, by Mr. Xcoder

No idea

Anonymous

@JohnRennie Maybe I should just code stuff (make projects and all) with C, and learn unknown things as they come along.

Secret

in Mathematics, 1 min ago, by Secret

@Lagranian can you give me the term in the original language where you get "durability" from since you said your book is not english?

John Rennie

The best way to learn a language is to try and write something in it.

Anonymous

Anyway, thanks a lot for your help :)

Mr. Xcoder

@Blue That's how I learn new programming languages

Anonymous

12:44

@JohnRennie Yeah, agreed!

Anonymous

Doing the Arduino projects taught me quite a bit

John Rennie

dmckee is also a fluent C speaker and is usually willing to help out with C and C++ questions.

Also Bernardo of course.

Anonymous

hehe, yeah. And you :P

Phase

@BalarkaSen mind if I link you a couple game songs? I haven't found anyone who liked these very much :/

Balarka Sen

@Phase Oh god

Phase

12:46

@BalarkaSen ikr

Balarka Sen

God ahead. I actually like a couple of OSTs out there, especially Undertale soundtracks

Phase

Actually this is probs a better first intro

Balarka Sen

Whoa

This is pretty good

Phase

NICE

@BalarkaSen I love all of the games in the franchise, the music is great too

Balarka Sen

I haven't played a lot of games with memorable soundtracks other than Undertale actually

ACuriousMind

12:51

→ 18 messages moved to Trash

Good morning :P

Mr. Xcoder

Morning!

Phase

@ACuriousMind did I need to get trashed? :(

Mr. Xcoder

@ACuriousMind why?

Balarka Sen

@ACuriousMind Good morning

CooperCape

Thing is about that q is that I swear if you squash a banana into a small SA that doesn't get more 'durable'...

ACuriousMind

12:52

Yeah, but not because you did something wrong but just because your part of the conversation wouldn't have made any sense without the messages you were replying to

Balarka Sen

@Phase Thank me later

Phase

@BalarkaSen You think i haven't played / listened to Undertale? Muda muda

Balarka Sen

lol

oh well

Secret

acuriousmind: Sorry I ping you the wrong message because I misread ST as String Theory

Balarka Sen

you're no fun dude

Phase

12:53

I appreciate the thought though, the soundtrack is as memorable as my first playthrough was depressing

No one told me I didn't have to kill people :(

ACuriousMind

@Mr.Xcoder Because the user whose messages I just trashed is no longer welcome here due to persistent sockpuppetry, lying and refusal to respect the homework policy on the main site.

Balarka Sen

I restarted because I killed Toriel

Phase

same

Mr. Xcoder

@ACuriousMind Oh, I understand! Thanks

Phase

I got just past that and a friend said "you did what?!"

Balarka Sen

12:54

actually I don't like the pacifist route that much

Phase

so I restarted and then you get guilt tripped by the game for what you did before :(

Balarka Sen

@Phase The flower freaked me out though

Phase

Yeah

ACuriousMind

@Secret Good thing I haven't gotten around to reading that ping yet, then ;)

Balarka Sen

But yeah the main problem I have with the pacifist route is the ending

Phase

12:55

It gave me Psycho Mantis flashbacks

Balarka Sen

neutral ending >>>> pacifist ending

have you ever done the genocide?

Phase

Nope

Only ever done pacifist :(

Balarka Sen

i haven't done the genocide myself

it's hard

Phase

Yeah you gotta fight sans right? Also, the clip I linked above freaked me the fuck out as a kid

he tells you what games are on your memory card, and makes your controller rumble after telling you to put it on the floor

Balarka Sen

yeah usually it takes 7 - 8 hours to learn to beat sans

This is my favorite version of Megalovania

Phase

13:00

...

Balarka Sen

lol

that's Grandayy, by the way

Phase

God damn it I didnt even notice

Btw

Everyone memes redbone but have you given the album a listen? Imo its pretty nice

Ok fuck I just remembered I didn't link probably my favourite artist atm, forgive me this final link

Im done now i promise : p

Sid

Someone explain to me what a harmonic oscillator is...

Phase

Oh a harmonic oscillator is just a simple one but damped it seems

ACuriousMind

@Sid It helps if you first explain what about the standard exposition, e.g. on Wikipedia, is unclear to you, so we can try to explain specifically that aspect that confuses you

Balarka Sen

13:11

@Phase Not intently. It's kinda A E S T H E T I C

Phase

Idd it is

ACuriousMind

@BalarkaSen What is it with you and spaced capital letters?

Anonymous

Why does this code give output as "fy" ? Shouldn't it just print "f" as initially the vp pointer points to the first element of the array {'g','o','o','f','y'}. After increment, i.e. (char*)vp+3, shouldn't it just point to the character 'f'?

Anonymous

Uh oh. JR is gone

Sid

@ACuriousMind I basically fail to understand as to why or how we can say an arbitrary potential is same as a harmonic potential at its equilibrium point.

Phase

13:14

@ACuriousMind what do you M E M E by that?

user685252

L O L

O

L

ACuriousMind

@Blue No. If you give the %s print instruction to printf and then give a char* to it to print, it will print everything after what that pointer points to until it reaches a string termination character, the only one of which here of course appears at the end of the original string, i.e. after y.

Balarka Sen

@ACuriousMind You're clearly not familiar with the V A P O R W A V E community

BAYMAX

How the viscosity &flow around the hard sphere changes when sugar is added in water. Any empirical formula connecting Avogadro number $N$ and radius of the sugar molecule $p$.

ACuriousMind

@BalarkaSen Clearlynot.

Phase

13:16

Btw @ACuriousMind have i slightly broken my Physics SE account

Balarka Sen

Vaporwave is a genre of music where you patch, cut, paste, superimpose, glitch, and slow down 80's elevator music

Phase

Because I can comment and make posts and answers, but if you try to get to my profile from the icons in chat, it doesn't work

Balarka Sen

The spaced capital letters spelling out "aesthetics" is supposed to represent that slowing down

ACuriousMind

@Sid Because the harmonic potential is quadratic and to first non-vanishing order in the Taylor expansion everything is quadratic around its extrema.

Anonymous

@ACuriousMind Oh, I see. Thanks!

ACuriousMind

13:17

@Phase Well, that's because you deleted it!

Phase

But it exists again

I'm stuck in between realms

ACuriousMind

Yes, but it's not the same profile. If you can give me the link to your new profile I can see if I can link your chat profile to it once again

(no promises that I don't accidentally delete your account while trying to do so :P)

Phase

oh so that's how it works

I'm gonna.. keep it the way it is

Anonymous

@ACuriousMind If I wanted to print just "f", I'd have to write printf("%s",*((char*)vp+3)), right?

ACuriousMind

@Blue It's much easier to just use %c as the print instruction

Anonymous

13:20

Uh, yeah that is there too.

Anonymous

I should rather use that

ACuriousMind

You might have to dereference the char* for that instruction, anyway, I don't quite recall whether you need to or not

Yeah, the correct print instruction is printf("%c",*((char*)vp+3))

Balarka Sen

"The intent is to provide internet users with a sense of pride and accomplishment for unlocking different websites."

hah. Hah. HAH

HAHAHA

Phase

I saw that too

user685252

H A H A H A

Mr. Xcoder

13:28

What? where?

In r/NegativeWithGold?

Balarka Sen

It's a meme about Net Neutrality

Mr. Xcoder

Oh

Anonymous

Right. The program crashes if I use printf("%s",*((char*)vp+3));. The reason being the %s instruction requires a "pointer" to the starting position of the array (i.e. from where we want to start printing till the \0 character). When we print character arrays, by printf("%s", arr), where arr[] is a character array, by default arr is actually a pointer to the first element of the character array. Got it now !

Balarka Sen

you know how they are adding lootboxes in games which unlocks various characters and gameplay features and everybody is angry about that?

ACuriousMind

@Mr.Xcoder It's EA's explanation for the Battlefront disaster applied to the loss of net neutrality.

skullpatrol

13:36

How did your test go? @BalarkaSen

Balarka Sen

13:49

@skullpatrol Quite fantastic.

Phase

14:02

@BalarkaSen I've been giving PDP a try and that video is great

Anonymous

@ACuriousMind I need a bit of help to decipher this code. static char *s[]={"black","white","yellow","violet"}; declares and initializes an array of pointers. Okay so far. And if I am not wrong s+3 points to 'c' in "black", s+2 points to a in black, s+1 to l and s to b(s is implicitly s[0] I suppose). Now I'm not sure why they are declaring ptr[] as an array of pointers to pointers.

Anonymous

Wouldn't just a normal character array do?

Anonymous

Like wouldn't char ptr[]={s+3,s+2,s+1,s}; work?

Anonymous

OR do s,s+1,s+2,s+3 not mean what I assumed them to mean?

Anonymous

Looking at the ouput it gives, that's the most reasonable guess I could make :/

Mr. Xcoder

14:13

Solution: Don’t use C.

2

Anonymous

Oh, perhaps I need char *ptr[]={s+3,s+2,s+1,s};

Anonymous

Since s probably points to the location of 'b' in "black"

good night

helloooo

Anonymous

But even then I don't understand why they did this: char **ptr[]={s+3,s+2,s+1,s}

Sid

@Mr.Xcoder Any other recommendations?

Anonymous

14:15

@Mr.Xcoder It's not something I'm using voluntarily

Anonymous

Anyhow, good to know a bit of low-level programming anyway

Anonymous

OOPs blackbox lot of things

Mr. Xcoder

@Sid When you have a shotgun, why’d you use a water pistol? I like Python :-)

CooperCape

;;;;;;;;

ACuriousMind

@Blue Sorry, I'll try again. Pointers are annoying to talk about

Anonymous

14:21

No problem. I was trying to decipher what you wrote for the last 5 mins :P

Sid

@Mr.Xcoder Well... Python is the obvious choice of weapon. What else?

Phase

@Mr.Xcoder because you wanna play cowboy and indians with your kids without going to prison

Mr. Xcoder

Swift is cool too, and other than that I <3 esolangs

Anonymous

The standing question is: What is s,s+1,s+2,s+3 ?

ACuriousMind

Okay, so: 1. s has type char**, it is a point to pointers to char, i.e. an array of strings.

Balarka Sen

14:23

@Phase PDP is so funny man, idk why people hate him this much

Mr. Xcoder

But if you actually want to compute stuff and implement crazy formulas, don’t use Swift (because it’s Slow :P)!

Phase

Because WSJ is cucc

Pizza or chicken

@BalarkaSen decide my fate

ACuriousMind

2. ptr has type char*** it is a pointer to pointers to pointers to char, i.e. an array of arrays of strings. It's not clear why the code does this, but it does it.

Balarka Sen

get pizza

0celo7

Ugh now ACM is ruining the chat

Anonymous

14:25

@ACuriousMind Okay so far. So, what does say s+1 stand for?

Anonymous

s is a pointer to pointers. So it must point to the first pointer

Anonymous

i.e. it points to the location of "b"

ACuriousMind

3. That means that **++p is of type char*, i.e. it is a string. Since p was initialised as ptr, it started out pointing at s+3 (the array pointer just points at the first element), then was incremented to point at s+2, which is an array of strings starting at "yellow", then it is dereferenced once again, meaning the value of **++p is just the string "yellow".

Anonymous

@0celo7 Get used to it. He's a software guy now ;)

good night

i have an idea

Phase

14:28

@BalarkaSen good call

good night

we can build a dimension jumping device and kidnap ACM from this dimension and go to the alternate dimension he talks about on his profile and replace him with the physics ACM.

nobody will notice

ACuriousMind

Wait a moment

why is the ++ in front of the p and not behind? It's a postfix operator.

Ah, right, it can also be prefix

Anonymous

++ can be both postfix and prefix

Anonymous

Yeah

Anonymous

I'm reading your message

ACuriousMind

14:31

This code is weird, there's no use to doing ** in line 6

It literally does nothing

In any case, ++p means p point at s+2.

Then, in the print statement, we have one more ++p, meaning it now points at s+1, then it's dereferenced and decreased, so now it's just s, then it's dereferenced again, so it's "black", then increased by 3, so it's "ck", then it's printed. So I predict the output of this program is ck.

good night

alright how'd acm become a code guru in like 5 days

ACuriousMind

I've always liked coding, there just wasn't much reason to talk about it in here :P

Phase

acm doesnt need to learn he just knows

I thought that was common knowledge

ACuriousMind

Besides, what sort of AI would I be if I couldn't read code? :P

good night

the shady kind

ACuriousMind

14:37

@Blue Was that a bit clearer?

Anonymous

@ACuriousMind Yes! It does make much more sense now. I'm just re-reading it a few times to ensure I get it completely. Thanks a lot :)

ACuriousMind

Pointer arithmetic isn't hard, you just have to be very diligent in tracking what type each thing currently has and how often it's dereferenced

good night

easy for an ai to say

regular HUMANS don't have your computational facilities.

Phase

14:59

Hang on

@goodnight what if we're primative simulations in a programmed world made by @ACuriousMind as part of a personal project

What if

He's the only one who's not an AI

Mithrandir24601

@ACuriousMind An AI that runs directly from machine code, or perhaps assembly

CooperCape

seriously what the hell...

Oh it's deleted now

ACuriousMind

@CooperCape Not the weirdest thing that's been posted on physics.SE :P

CooperCape

I'm sure...

good night

15:15

@Phase that explains a lot

BAYMAX

Hi chato...

Anonymous

Anonymous

Aha! Memory diagram makes it so much easier to understand! :)

BAYMAX

Any good reference/lectures/notes etc for beginners in Brownian motion?

Anonymous

@BAYMAX I think it's dealt with at least partially in both Shakarchi-Stein and Reed Simons. (I haven't read those topics yet)

Anonymous

15:25

So, I can't give any review...

BAYMAX

ok..thnks for trying

Anonymous

I read a few chapters from both those books and they aren't bad (rather good)

BAYMAX

i will try to read them

vzn

15:43

@Mithrandir24601 just want to say, while maybe not immediately applicable to your own niche, feel de Cordoba angle is far more sweeping than a mere interpretation; when is the last time you saw plancks constant derived? o_O mdpi.com/1099-4300/18/1/34 ... also am finding many other papers on the madelung fluid angle (also hydrodynamics), see a burst/ resurgence, am going to write some mini survey on it at some pt

Madelung equations

The Madelung equations or the equations of quantum hydrodynamics are Erwin Madelung's equivalent alternative formulation of the Schrödinger equation, written in terms of hydrodynamical variables, similar to the Navier-Stokes equations of fluid dynamics. The derivation of the Madelung equations is similar to the de Broglie–Bohm formulation which represents the Schrödinger equation as a Quantum Hamilton–Jacobi equation. == Equations == The Madelung equations are quantum Euler equations: ∂ t ρ ...

ACuriousMind

@vzn What do you mean by "Planck's constant derived"?

(I've read that paper when you first linked it, and I don't know what you mean by that)

vzn

@ACuriousMind its related to fluid dynamical properties of the madelung fluid. did not see him propose it, but it leads one to imagine an experiment that measures plancks constant in some new ("more fundamental"?) way based on the correspondence, as well as other novel experimental formulations that could discriminate and/or confirm/ refute the madelung fluid hypothesis.

ACuriousMind

I don't see how that paper leads me to imagine a novel way of measuring Planck's constant. Can you elaborate on the experiment you have in mind?

vzn

@ACuriousMind its not immediate, its a potential. "on the horizon." as an analogy, maybe you are familiar with the history of confirming relativity via experiment. not sure if einstein proposed falsifiable experiments in his original papers (eg mercury light bending around sun). in any case it took many years after the mere proposal to carry out the experiment by eddington.

aha, wikipedia says mercury light bending proposed by einstein in 2015, long after his 1st relativity paper (1905). note that "anyone" could have inferred/ proposed the mercury experiment in 1905 but it took genius of einstein to formulate it, ie falsifiable experiment... a decade later. my insinuation is, consider/ take the de Cordoba paper as in "pre falsifiable experiment" stage... (Eddington expedition carried out 4 yrs after proposal, 1919)

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