The Nineteenth Byte

mınxomaτ

12:00

I improved the caching a bit for codegolf.xyz, it's now about 6% faster than codegolf.stackexchange.com. Authentication coming soon, to make the site browse-able for logged-in users.

Fatalize

12:10

@mınxomaτ is that even legal?

zyabin101

@Fatalize What is?

Fatalize

copying a SE site

Quill

@mınxomaτ you should apply Downgoat's design userscript naturally to the site

Mars Ultor

@Fatalize Yes

@Quill naturally?

Quill

like he should build it with the page

Mars Ultor

12:19

@Quill As in just add it in a script tag?

Quill

yeah

Mars Ultor

Or merge the CSS/HTML, then add the rest into a script tag

wat

No

Use num & 0x80 if it's 32-bit

Else num & 0x8000

Yeah

Basically that is num & 0b10000000000000000

@QPaysTaxes You use a bitshift

zyabin101

> unm

Mars Ultor

Say num = 0b1010

@QPaysTaxes Well, yes

In that specific case

zyabin101

>_> I was too late with the message. @MarsUltor you heard nothing. >_>

Mars Ultor

12:28

I guess it isn't too slow either

Bassdrop Cumberwubwubwub

Why does phoneNumber.split('-') feel so satisfying to write

Mars Ultor

But the & 0x80 works for every number and avoids a second operator and a variable duplication

Quill

@BassdropCumberwubwubwub it's like eating chocolate while on a diet

Mars Ultor

@QPaysTaxes Then you use & 8000

Basically it's a number with just the leftmost bit

@QPaysTaxes Hmm, wait a second. You need to get it using sizeof and bitshift a 1 by that many bytes * 8

You should store it globally

somehow

Wait nvm

But are you using it for more than one type?

Then you should probably write the mask in the source

@QPaysTaxes ?

It's (1 << (sizeof(SIZE_MAX) * 8 - 1))

Make sure you correct the mask

(I can't tell if you've fixed it or not)

It can be any primitive integral type

It may be an internet issue

oic, just read your previous message

Do you have any idea why the internet is like that?

The WiFi cost $2m?!

How big is the school

As in number of students

Bassdrop Cumberwubwubwub

12:45

300 students at any time? :D

Mars Ultor

I really doubt setting up my school's wireless cost $2m

Oh wait

> Enrollment 3,062

Bassdrop Cumberwubwubwub

Depends, if you want a really strong connection you could go for 100k routers, all $20 each

Mars Ultor

@BassdropCumberwubwubwub That's too many

Bassdrop Cumberwubwubwub

Ensures a strong connection though

Mars Ultor

I'm guessing ~200 at $200 each should be enough?

That's $40k for 15 students per router (I doubt it needs that much), plus say $60k for the rest of the setup (wiring etc.) should be enough

Bassdrop Cumberwubwubwub

12:48

More than enough

zyabin101

Weekly "dare to answer?" question:

5

Q: Jordan Decomposition

important note: Because this challenge only applies to square matrices, any time I use the term "matrix", it is assumed that I am referring to a square matrix. I am leaving off the "square" description for brevity's sake. Background Many matrix-related operations, such as computing the determin...

Bald Bantha

13:06

A wild bantha apears

zyabin101

Go! Bulbasaur!

Bald Bantha

What is a bulbasaur.... I am a bantha....

zyabin101

>_>

veekun.com/dex/pokemon/bulbasaur

Bald Bantha

¯_(ツ)_/¯

Ok so banthas play MTG not pokemon. Only reason Ill every play pokemon is for the games not the cards

zyabin101

I don't know MTG. >_>

And I won't, in the forthcoming future.

Bald Bantha

13:13

WAY to expensice.

I lost my 150 dollar deck camping (banthas are dumb) and yeah so I don't play anymore because my cards are gone

I'm 14 that was like a years allowance

Getting a job soon though

Fatalize

is everyone 14 here or what

Bald Bantha

No river is 13

zyabin101

@BaldBantha Riker.

mınxomaτ

@BaldBantha How much is sea?

zyabin101

@mınxomaτ Sea is 25.

Ocean is 200.

quartata

13:24

@mınxomaτ I would normally use the CDN but in this case I need it locally for opal-jquery

mınxomaτ

> opal-jquery provides DOM access to opal by wrapping jquery (or zepto) and providing a nice ruby syntax for dealing with jquery instances.

> nice ruby syntax

Just reading that hurts.

quartata

I like Ruby.

obviously I wouldn't do this in production but I was curious to see how functional Opal was

mınxomaτ

Anyone here every used mushroom network gear for link bonding?

No puns pls.

El'endia Starman

@Fatalize A few in here are 15. But yes, there are a lot of underage people. :P

Quill

For the voting, drinking definition of underage, not the SE requirements definition of underage

El'endia Starman

13:36

Indeed. ;)

PhiNotPi

I guess it's a good thing that there's lots of young people interested in programming?

El'endia Starman

I think so too.

quartata

@mınxomaτ Not sure why you're asking this here and expecting a serious answer

Bald Bantha

@zyabin101 Yeah river is

18

Q: How old is River Song?

How old is River Song? How old was she when she "died", and how old was she at other points in the series?

doctor-who age

El'endia Starman

It's crazy to think that Conor is developing bits and pieces of programming languages at the age that I was just starting to learn programming.

Quill

13:37

@El'endiaStarman Doorknob excepted ;p

PhiNotPi

What age is Conor?

Bald Bantha

IDK hes in highschool AFAIK

El'endia Starman

15, I think.

Bald Bantha

Doorknob is 15

and a mod...

Quill

Doorknob is magic, though

5

Bald Bantha

13:41

Where did @Doorknob learn to code?

Bassdrop Cumberwubwubwub

Kindergarten

Quill

My suspicions are still time travelling... come to think of it... time-travel is a Ruby gem, IIRC

Bald Bantha

@BassdropCumberwubwubwub Seriously? I'm jealous I started coding at 12 on code academy, got bored, then took a class in C# as part of the duke tips program now I'm self taught. I'm probably the worst programmer who frequents TNB, but I don't have any programmer friends IRL so

quartata

I think he was joking

Bald Bantha

OK there is no way he wrote cfractal in 2015 (he could have been 14 then) keyboardfire.com/portfolio

quartata

13:49

He wrote that for Code Day 2015 along with a couple other folks I believe

trichoplax

@BaldBantha Check out the transcript - he was posting images from it while developing it

Bald Bantha

@trichoplax Where?

trichoplax

Here :)

Bald Bantha

So what time 2015?

trichoplax

@BaldBantha There's a search at the top right of chat and you can also narrow it down by username: chat.stackexchange.com/…

quartata

13:51

Sometime in December I thought

trichoplax

Nov 8 '15 at 1:21, by Doorknob

Bald Bantha

He's a prodigy.

El'endia Starman

I hope he'll be more than a prodigy. He should be a lifelong expert programmer.

Bald Bantha

brb, trying to figure out the context for this:

10 hours ago, by Helka Homba

It's depressing when I take my shirt off and people tell me I should be programming instead

El'endia Starman

Is there a word for "expert among experts"? Like, I consider myself an expert since I've probably surpassed the 10,000 hours for mastery, but among other experts, I feel like I'm at the bottom of the barrel.

trichoplax

13:56

I think a lot of experts feel that way mutually about each other

El'endia Starman

@BaldBantha Context is the message right above.

Bald Bantha

Yeah figured out

El'endia Starman

@trichoplax Well, at least with Stack Overflow, it's objective. :P

trichoplax

I mean that someone you are impressed by can also be impressed with you for something you no longer realise is impressive due to becoming used to it

El'endia Starman

That's true.

Bald Bantha

13:59

It's funny, all my friends think I am a genious with computers when I'm really quite a n00b when it comes down to it

Zgarb

@El'endiaStarman I don't know, but the "opposite" is impostor syndrome.

trichoplax

There should still be a word for expert among experts though. There are some people who just seem to have all the background in every topic and the insight to put things together effortlessly from apparently unrelated topics

Sp3000

@El'endiaStarman "best of the best" in a sense, but for the "bottom of the barrel" part that could be "little fish in a big pond"

Quill

@El'endiaStarman it's a hard metric to measure... I felt the same about JavaScript, and then you get people like @Downgoat that come in and make you hesitate a little :p

@trichoplax True experts

Being a jack of all trades in every area gives you enough context to piece together CLI, DB, Web conversations

trichoplax

I suppose polymath covers a jack of all trades who is also master of them all

Quill

14:02

and hey you look like an expert, but really you don't know anything amazingly well

El'endia Starman

@trichoplax Yeah, polymath came to mind when you said this, but that means being a master in multiple areas.

"Best of the best" is definitely workable. I feel like that's more broad than I'd like, since you can apply it to skills like hotdog eating.

Sp3000

Closest I can think of atm, unfortunately :/

Bald Bantha

I think I'll get better As I take higher math classes... Much of the challenges on PPCG I can't due because of math, not code. (Not saying PPCG judges programming ability)

El'endia Starman

Yeah. I was thinking that maybe "Uber expert" could work? :P

trichoplax

"Guru" seems to be used occasionally, but I'm never quite sure what level it signifies

Sp3000

14:04

Everything else is more just general experts (one layer) rather than expert of experts (two layers), e.g. cream of the crop

Bald Bantha

@El'endiaStarman Expert at driving independently for pay?

El'endia Starman

Darn them for picking that name!

Bald Bantha

@El'endiaStarman Usually a specific name. Jon Skeet, Chuck Norris, Michael jordan, etc.

El'endia Starman

Nobel scientists too, but those are a bit too numerous to name individually.

Sp3000

In Chinese sayings, there's "there's always a taller mountain" to mean "there's always someone better than you", but unfortunately since the age of orienteering that's not really applicable any more

Zgarb

14:07

@trichoplax There's also "wizard".

Bald Bantha

@El'endiaStarman Einstein is used as a description of a genius

@Sp3000 Bigger Fish in english

El'endia Starman

SUMMON BIGGER FISH!

Sp3000

Yeah, I said "little fish in a big pond" earlier

Expert amongst experts does seem like it should have something though

Nathan Merrill

I'd still just call it "expert"

Bald Bantha

"Always a Bigger Fish" - The Phantom Menace [1080p HD]

►

Yes, I know, -1 for prequels.

Nathan Merrill

14:09

I mean, expert doesn't imply "top of the game"

El'endia Starman

@BaldBantha Hey, I liked them.

Bald Bantha

I smell an english usage question

Nathan Merrill

@El'endiaStarman I even preferred them to 4-6

Zgarb

I've used "world-class expert" in the past.

trichoplax

Ah that sounds good

Bald Bantha

14:10

@NathanMerrill Yeah, the politics were nice, but "yes master" "no master" "Ok master" gets so annoying

Sp3000

I like the sound of world-class

trichoplax

There's always a worse franchise

El'endia Starman

Yeah, "world-class" is good.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Shower this answer in upvotes please :3

2

A: Evaluate a string as a verb in J

Evoke gerund (`:) is what you want. Please refer to this short documentation for good examples. And in your case: str=: '+ @ >: @ %' (;: str) `:6 +@>:@% You may want to review Tie (`) to understand this. ;: returns gerunds in our case (atomic representations), and m `: 6 converts gerund ...

El'endia Starman

"Jon Skeet is a world-class programmer."

trichoplax

14:11

@CᴏɴᴏʀO'Bʀɪᴇɴ Why is stackoverflow trying to run flash when I follow that link??

Bald Bantha

BTW, I'm making an animatronic talking robot with a styrofoam head, and a raspberry pi. I'll post a video when I'm done

Cᴏɴᴏʀ O'Bʀɪᴇɴ

o_O

trichoplax

"I'm aiming to become a county-level programmer"

@BaldBantha ping me when you do :)

Bald Bantha

@trichoplax K. I was going to make it an AI, but I can't find a good speech-to-text API or `nix utility so

Googles is broken

Cᴏɴᴏʀ O'Bʀɪᴇɴ

> wat (Germanic)

Bald Bantha

14:20

Anyone here work for google? please fix the speech to text API or tell me how it works. ~~It's all your fault.~~

Sp3000

I'm pretty sure most people who answer yes for the "work for Google" part would have no say over the latter half

Cᴏɴᴏʀ O'Bʀɪᴇɴ

^:p

Sp3000

Actually, the "tell me how it works" part would probably be an NDA violation :P

PhiNotPi

Woo! I got into the IBM Quantum Experience! (research.ibm.com/quantum)

Bald Bantha

@Sp3000 I know. But I have to blame someone: and we all know that you always blame the devs.

Sp3000

14:22

What? No. Aren't we meant to blame the users?

Bald Bantha

@Sp3000 LIke, how to use it, because it is not working as it used to

@Sp3000 But the users didn't make the API

Nathan Merrill

@Sp3000 funny enough, I actually only signed 1 NDA agreement when I interviewed at google, and it was an agreement that I wouldn't violate other NDAs that I had signed with other companies

Bald Bantha

When programmers are using something other programmers made, you blame the other programmers

Nathan Merrill

I guess it wasn't really an NDA agreement, but they really were careful to make sure they were legal with everything

Sp3000

@NathanMerrill Funny that, cos I definitely had an NDA

Bald Bantha

14:26

gist.github.com/alotaiba/1730160

does not work

mınxomaτ

@PhiNotPi My application has been approved, too! Thanks for reminding me, the mail was in my spam folder >.>

PhiNotPi

@mınxomaτ It's because your classical computer has a grudge.

4

mınxomaτ

:D

New Main Posts

0

Q: Find the number of needles in the haystack

You have this huge book and want to know how often a sequence of chars (the needle) occurs in the text (the haystack). However your Frameworks search count function is broken, so you have to implement the algorithm yourself. TL;DR How many needles are in the haystack Input String of any lengt...

code-golf

Sp3000

The mail is actually in both the spam folder and your inbox.

mınxomaτ

14:35

@PhiNotPi The unit coupons are really complex (</sarcasm>). I'd design a qubit sandbox and let new users solve different quantum problems (e.g. complete this algorithm etc.) to get more units.

TimmyD

@Sp3000 Schrödinger's mail

quartata

So what's it like? Do you just drag and drop quantum gates or something?

mınxomaτ

@quartata It's basically this: qcad.osdn.jp, but real.

Sp3000

Well since everyone's applying, I might as well join the bandwagon :P

PhiNotPi

@mınxomaτ how much experience do you have with quantum computers/programming? Because I'm just flying by the seat of my pants.

Bald Bantha

14:44

IMO (IDK anything) Quantum computing is a terrible Idea because with great (processing power) comes great responsibility. Hashes could be decrypted much faster, so all security would be easily hackable. Encryption relies on how long it takes to decrypt, and quantum computers could decrypt hashes easily, which is bad for security and good for bitcoin mining

mınxomaτ

I was using libquantum when it was developed and teached a class on quantum systems in general. But I have to re-learn like 80%. I've been fooling around with qCAD, since it more accurately resembles IBM's quantum composer.

Sp3000

@BaldBantha ... the point is to come up with new security? No security system is designed to last forever.

Bald Bantha

@Sp3000 So how to create a hash that a quantum computer that is incredibly fast cannot decrypt?

PhiNotPi

It also looks like there's a distinction between "Standard" and "Expert" users. I wonder what it takes to be an expert user.

mınxomaτ

@PhiNotPi If you are learning, there's a partial JS port of libquantum that has a nice 3D representation of the running system and some really advanced examples at qcplayground.withgoogle.com. It simulates up to 22 quBits.

Zgarb

14:47

Post-quantum cryptography

Post-quantum cryptography refers to cryptographic algorithms (usually public-key algorithms) that are thought to be secure against an attack by a quantum computer. This is not true of the most popular public-key algorithms which can be efficiently broken by a sufficiently large quantum computer. The problem with the currently popular algorithms is that their security relies on one of three hard mathematical problems: the integer factorization problem, the discrete logarithm problem or the elliptic curve discrete logarithm problem. All of these problems can be easily solved on a sufficiently large...

mınxomaτ

@PhiNotPi You have to apply and give reasons for the upgrade.

PhiNotPi

@mınxomaτ Of which I have none.

Bald Bantha

@Zgarb yay I was right for once (about there being an issue with figuring out encryption post-quantum computing)

mınxomaτ

BTW: Here's a demo of integer factorization, performing on fac(15): qcplayground.withgoogle.com/#/playground/5191954035900416

Zgarb

@BaldBantha Yes, it seems that current public key protocols are vulnerable to quantum brute forcing (so new ones are needed), but current hash functions should still be secure.

New Sandboxed Posts

14:58

0

A: Sandbox for Proposed Challenges

How many needles are in the haystack? You have this huge book and want to know how often a sequence of chars (the needle) occurs in the text (the haystack). However your Frameworks search count function is broken, so you have to implement the algorithm yourself. Input String of any length > 0 ...

Cᴏɴᴏʀ O'Bʀɪᴇɴ

chat mini challenge: given strings I and J, output/return J + I + reverse(J).

Nathan Merrill

add a d, and you've got your python answer

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Sp3000

Not quite - you can't just add a reversed to a str like that :P

Nathan Merrill

bah, you're right

also, it'd be great if deleted questions didn't show on the sandbox

El'endia Starman

15:09

@CᴏɴᴏʀO'Bʀɪᴇɴ That took me longer than I'd like.

Sp3000

@NathanMerrill Not really, if there was a good reason. But I think I know which question you're talking about, so nevermind.

Nathan Merrill

no, I've thought this for a while*

Sp3000

?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman It's a hard one, but it's so good when you get it :3

Nathan Merrill

I mean, there's been so many times I've been going through the sandbox, and I have to scroll passed a bunch of posted/deleted challenges

Sp3000

15:12

I guess it's just that P(bad challenge|previously deleted) just happens to be pretty high.

quartata

@El'endiaStarman I just got it:/

El'endia Starman

@NathanMerrill I sort by votes so I don't have this problem.

Sp3000

But if it was a would-be-good challenge that has a minor but difficult to rectify immediately flaw that needs fixing, I wouldn't mind

El'endia Starman

@CᴏɴᴏʀO'Bʀɪᴇɴ I was initially sidetracked by thinking that it was geometrical in nature.

@CᴏɴᴏʀO'Bʀɪᴇɴ I feel like this would not work very well as a spoken joke. "Don't be such a third derivative of s with respect to t!"

quartata

In hindsight it seems really obvious

Nathan Merrill

15:18

@El'endiaStarman you could say "Don't be such a change in acceleration!"

maybe?

El'endia Starman

@NathanMerrill That'd be better, yeah.

Oooh, now I have a new way to yell at people! "Why'd you do that you change in acceleration?!"

Sp3000

To be extra obscure: "Don't be such a Rice Krispies preceder"

Nathan Merrill

also, let it be known that I drive in respect to jerkiness.

TimmyD

Quick language survey -- if your language doesn't have explicit casting, and you keep incrementing an integer (e.g., a loop) ... does the data type overflow into the next-higher-size int value, or into something else?

Nathan Merrill

aka, I brake soft at first, then increase, then back off

TimmyD

15:20

In PowerShell, an undeclared [int] value will eventually overflow into an undeclared [double] value

El'endia Starman

@Sp3000 I can't even find out what that is via Google.

Sp3000

@El'endiaStarman Hint

El'endia Starman

@TimmyD Python: automatic promotion to bignum.

Nathan Merrill

@Sp3000 lol

apparently, nobody cares about Jounce

TimmyD

PS C:\Tools\Scripts> for($a=2147483645;$a-lt2147483650;$a++){"$a - " + $a.GetType()}
2147483645 - int
2147483646 - int
2147483647 - int
2147483648 - double
2147483649 - double

El'endia Starman

15:22

@Sp3000 ...oh wow, that is obscure.

Sp3000

It's funny, because the Jounce page says it's also called Snap

So one of the two pages is wrong (4th vs 5th)

@TimmyD Yes for Python 2, in a sense

I guess that might depend on whether you count long() as casting

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@CᴏɴᴏʀO'Bʀɪᴇɴ a bit late, but I voted.

El'endia Starman

@TimmyD Blitz 2D/3D: wraps around like C. Blitz only has int and float for numeric types.

TimmyD

See, Python's promotion makes sense.

Why would PowerShell elect to go from [int] to [double] instead of [int64] is beyond me.

Sp3000

15:38

At least it's not JS

Optimizer

^ -15

> Straight out of the sewers of Cerulean City, it's the...
> Teenage Mutant Ninja Squirtles

Sp3000

Why am I not surprised there's already T-shirts for that

TimmyD

Nathan Merrill

hey, so I got a typing idea. Basically, I want to add a "read" attribute to types

so, a LinkedList can be read as a Graph

but not written as a graph

El'endia Starman

Hmm. Curious.

Nathan Merrill

15:49

So, if you have a function that takes a graph, and all it does is read it (like traversal), it'd work on a linkedlist

another cool usage is that cloning an object would also work

so you upcast a linkedlist into a graph

(which would be writable)

it also gets rid of the silly "wrap your array list with another as you return it)

which you have to do in Java

actually, question: would there be any benefit to "write-only", but not read?

(outside of files)

El'endia Starman

Not that I can think of immediately.

Writing data is only useful (except for a few niche cases) when you want to read it at another time.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb Found another bug (at least, according to the docs) on tryj.tk. __+_ should throw an NaN error and _. should be (?) _., not 1 :p

Nathan Merrill

ok, another question: what's a good currying syntax

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