The Nineteenth Byte

Adám

00:44

CMQ: I'm considering posting "APL Monday" questions here; every Monday an APL function and the task is to decipher what it does. Any interest?

rydwolf

Ooh, that could be neat (specifically the deciphering angle)

Adám

01:06

Some will be easy, some harder. Here's an easy example:

Here's a medium one:

@rydwolf I didn't really think about it, but I suppose deciphering code is in fact a type of coding challelnge (so, on-topic), just not a challenge type we ever see here.

lyxal

Make sure to also send a text version too

Also, is using things like aplcart disallowed?

Adám

01:27

@lyxal Yeah, I'll always do that; these were just as examples.

They are actually all either taken from or inspired by APLcart entries, but they are often not exact matches… Up to the people who answer if they want to use it.

lyxal

Fair enough

emanresu A

02:03

4

Q: Our robots.txt file is changing to allow only CloudFlare's verified bots

I’m elo, Stack Exchange’s Director of Reliability Engineering. I’ve been employed at Stack Exchange for just over three years - but this is my first time posting here on Meta! On December 10th, our robots.txt file will change. This change is part of our efforts to prevent unauthorized automated a...

TL;DR yet another failed attempt to block ai scrapers, because those definitely care about robots.txt

lyxal

02:15

I suppose it's in addition to the rate limiting changes

I wouldn't say failed though

Questionable, yes, but it can't be failed just yet

Given it hasn't been actually changed yet :p

Sandbox Posts

04:09

0

A: Sandbox for Proposed Challenges

Count Leap Years in a Given Range Objective You are tasked with writing a function that counts the number of leap years between two given years, inclusive. A leap year is defined as follows: A year is a leap year if it is divisible by 4. However, if the year is divisible by 100, it is not a leap...

rydwolf

05:31

I don't know how I never realized until now that ICs, including CPUs, are typically 2d

(with exceptions like multi-layer flash)

what the hell is the semiconductor industry on

What are they going to do once the term 1nm is used up? Start calling them picometer processes?

ugh I need to pull an all-nighter and lock in on something due very soon that will be a lot of work and I am currently only doing part 1

I have 200mg of caffeine in my system but my eyes are bleary still

I love the word "bleary", it's the sort of word where you know exactly what it means but have almost certainly never needed to look it up

New Posts

06:02

0

Q: Tracing light through a house of mirrors

Introduction Suppose you find yourself in a house of mirrors. For instance, if the room has three mirrors, you could imagine how your image might reflect off of mirror A, followed by mirror B, followed by mirror C again, followed by mirror A. If the mirrors are arranged in just the right way, it'...

code-golf string math combinatorics

rydwolf

08:50

Every day that I read something about C++ I get happier I never strayed too far down that route

14

Q: Why should C++ uint8_t data not be printable?

On this github C++ related page the writer said Note that the value_type of those two containers is uint8_t which is not a printable character, make sure to cast it to int before you print. Why should this be so? For numbers < 128 decimal the sign bit will be zero. In an ASCII based system an eg "

type-casting character-encoding

I was gonna learn C++ once, checked out a book from the library on it. The cover had a bunch of images of cakes for some reason. Half a dozen people asked me if I was learning to bake cakes by the end of the day and I returned it out of annoyance, and that happy accident may have forever altered the trajectory of my life and preserved my sanity until the start of college

Themoonisacheese

@rydwolf a lot of copium

basically the node name is nowadays a literal marketing term (hence why intel renamed its process from "10nm" to "intel 7", conveniently bringing it to the same number as TSMC), but basically the node name used to measure gate length, not pitch

gate length used to be a good indicator of gate pitch as well, because the limiting factor of how closely you could stack transistors was the gate length, but since about 2014, gate length has become tiny enough that it's possible to stack transistors so close together that electrons can quantum tunnel to nearby traces

emanresu A

or, well, can quantum tunnel frequently enough for it to be a problem

Themoonisacheese

so they've had to dial it back on the gate pitch, but smaller gates still allow you to use less energy to activate them, so by using a smaller gate you also get to slightly decrease gate pitch

@emanresuA well yes, and that was already a problem in 2014. nowadays, even if you managed to stack transistors at say a 20nm pitch, you would recreate Rowhammer but for logic and that's sure as fuck not passing QC

cant believe there finally was a question in TNB that i was the most qualified to answer

4

mousetail 'he-him'

09:06

I wonder if there would be a way to use the random quantum tunneling for something useful. A TRNG perhaps

Themoonisacheese

unfortunately asking TSMC to please pretty please ignore the "gate pitch too small" warning on their very expensive ASML machines just so you can get a TRNG you can also get by simply sampling EM noise too precisely isn't going to work

in theory though, sure, but that's additional R&D for a thing we already have

mousetail 'he-him'

I should pitch this idea to ASML

Adám

@mousetail'he-him' Might not happen often enough to produce enough randomness.

mousetail 'he-him'

That's just a matter of putting the tracks closer together till you get the desired number of tunnel events right?

Adám

Yeah, but even then, how do you translate events occurring at random intervals to evenly distributed 0s and 1s?

You'd have to know the exact expected average frequency.

Neil

09:19

you have two tunnels, and wait to see which one tunnels first

mousetail 'he-him'

I beleive modern TRNGS use random decay events from radioactive material, the algorithm to turn random events into uniform numbers should be well known

Adám

@Neil Ah, of course.

But how do you know they two are exactly the same?

I guess you could alternate between them.

mousetail 'he-him'

If the two tunnels are uneven, alternating would increase the chance the next bit is different than the previous

Neil

only alternate from the previous simultaneous events

sergiol

09:56

hello. can somebody please add Tcl 9 on TIO?

Themoonisacheese

10:14

@sergiol probably not. TIO has been on life support for... i want to say multiple years?

ATO has tcl but i can't tell if it's version 9 or not ato.pxeger.com

sergiol

10:35

@Themoonisacheese but I can. It is 8.6: tio.run/##K0nO@f@/oLSkWCE6My8tX6EkOacstag4Mz8v9v9/AA

Themoonisacheese

ato also has 8.6

@pxeger ^

sergiol

I didn't know ATO even existed! thanks.

I can confirm ATO has Tcl 8.6:
https://ato.pxeger.com/run?1=m724JDlnwYKlpSVpuhbbCkpLihWiM_PS8hWAwmWpRcWZ-XmxEEmoGphaAA

Themoonisacheese

11:02

→ 1 Island of Dubai moved to The bottom of the sea

lyxal

do note that we (RO's) typically wait until spam is deleted from main before moving

Themoonisacheese

i am aware, but this is... well.

lyxal

11:19

oh shit

doorknob's posted an answer

New Posts

12:02

0

Q: "Graphing" calculator

Kinda a short one, but yeah. Y=MX+C is the equation we all learnt to represent a line... But can you Code Golf it? Write a program that takes in a list in the format M, C, V, and then returns the first V worth of whole x values. V will always be 1 or greater, M and C can have any (float) value (...

code-golf

Themoonisacheese

13:32

Dirty bomb

A dirty bomb or radiological dispersal device is a radiological weapon that combines radioactive material with conventional explosives. The purpose of the weapon is to contaminate the area around the dispersal agent/conventional explosion with radioactive material, serving primarily as an area denial device against civilians. It is not to be confused with a nuclear explosion, such as a fission bomb, which produces blast effects far in excess of what is achievable by the use of conventional explosives. Unlike the rain of radioactive material from a typical fission bomb, a dirty bomb's radiation...

i'm gonna lose my mind at the "accidents with radioactives" section

two men get a capsule, they start shitting and vomiting, one has swelling on his hand
"oh no! surely they will go to the hospital and throw the extremely cursed artifact away!"
> A few days later one of the men punctured the 1-millimetre-thick (0.039 in) thick window of the capsule,

but wait, there's more!
> when realizing the powder glowed blue in the dark, brought it back home to his family and friends to show it off.

please do now show the cursed 50 TBq glow-in-the-dark powder to your family

Ginger

hm yes fifty terabecquerels

Themoonisacheese

the page on Gray (unit) also has this hilarious juxtaposition

mousetail 'he-him'

13:55

"Accidents with radioactives" seems not really related to the article topic "Dirty Bomb". Nothing malicious happened here

Themoonisacheese

i think it has to do with no instances of a dirty bomb being ever used, so they use that as a stand-in for the effects it could have

> The Goiânia incident to some extent predicts the contamination pattern if it is not immediately realized that the explosion spread radioactive material, but also how fatal even very small amounts of ingested radioactive powder can be

rydwolf

14:32

96 cores go brrr

Ginger

whar

rydwolf

research machine for my cybersecurity project lol

gotta generate a lot of heat

Ginger

ah

apparently chat does not have a way to escape strikethrough

Themoonisacheese

@rydwolf just yesterday i was asked to price 64c/128t machines for work lol

our compute farm has 600 cores and we're hitting max usage every afternoon

Adám

15:21

@Ginger ‐‐‐a‐‐‐ ;-)

Ginger

I see :p

Seggan

16:14

never knew this existed

Neil

16:28

I got an announcer badge for a post I don't remember sharing

Ginger

17:59

in Sandbox, 29 secs ago, by Vyxal Bot

@Ginger I am nuzzles your necky wecky d-d-d-doing my diwowce papews – ̗̀ (ᵕ꒳ᵕ) ̖́- :( A-A-Appawentwy I (uwu) nyewew payed smirks smugly enyough attention whispers to self to the wewationship and that instead I spent aww my time wesponding to commands with f-funny wesponses.

vyxal bot rewrite going great

mousetail 'he-him'

Does this qualify as brainrot?

emanresu A