The Nineteenth Byte

att

02:07

is there a vanilla bijective-base en/decode challenge

l4m2

@lyxal I think I can't pronounce half of sh

hyper-neutrino

02:34

@lyxal he sussy

(I assume that was the joke) (you're welcome for pointing it out anyway :P)

noodle man

shes fussy

@lyxal [ussy]

lyxal

03:44

@hyper-neutrino it's in the same spirit as sbeve

hyper-neutrino

I figured lol

lyxal

03:57

14 year old code golfers be shaking rn

Rydwolf Programs

05:07

> Austin Robert Carlile (born September 27, 1987) is an American singer, songwriter and musician from Pensacola, Florida. He achieved prominence as formerly the lead vocalist of Attack Attack! and Of Mice & Men. After leaving Of Mice & Men, he began coaching youth baseball in Costa Rica.

Such a random career change lol

chunes

06:07

I just made a catastrophic edit to one of my answers by mistake and for some reason I see no way to roll it back? codegolf.stackexchange.com/a/273239/97916

I thought you could do that if you click on the 'activity' button

lyxal

I rolled it back for you, but for reference, the rollback button is on the edit history page

you get there by clicking "edited <time frame> ago" next to the "answered by" box

chunes

aha, that's what I was missing. Thank you

lyxal

nw, happy to help

Rydwolf Programs

Personally I'm on the side of the skibidi toilets. The cameramen are too authoritarianism-pilled for me

I know it's a controversial take, but I think the skibidi toilets were here first and have the right to stand up to the well-organized, mind-controlling forces that want to keep them down

lyxal

06:22

unrelated, but I find it interesting that when MDN partners with OpenAI no one cares or makes noise about it, but when SE partners with OpenAI, you get protests, a thousand downvotes and displeasure from the community

mousetail

Far less people contribute to MDN

lyxal

even then, you don't hear of news articles quoting people quitting contributions to MDN and encouraging vandalism of posts

caird coinheringaahin g

@Adám Sorry for the delay in responding. Yeah, I'd be down, looks like an interesting podcast! For full clarity, Jam never really got off the ground (uni kinda took focus at the wrong moment :P) but I did publish the fork of Jelly that's been used for unofficial updates to Jelly

lyxal

I thought the fork was Jam

caird coinheringaahin g

Nope; Jam was the planned successor to the fork, as an official and independent language

lyxal

06:33

Ah

mb

caird coinheringaahin g

I suppose, technically, Jam is the fork, as the entire content of Jam atm is just the fork :P

But conceptually, Jam != Jelly (caird fork)

mousetail

@lyxal There is much less expectation of ownership on MDN. Posts don't even list their authors. So it makes sense people would be less upset. Also you can't deface because someone needs to review the pull request

emanresu A

I put caird's jelly fork on DSO a while back

There's also M which is jelly but with arbitrary-precision rationals

lyxal

@mousetail fair enough

Simd

08:13

@Bubbler I like this idea! The reason I ask is I want to multiply an array of numpy.float128 more quickly using cython or numba. But I don't really trust my expertise so I want to have some way I am still handling things with the right precision.

numba doesn't support np.float128 so I have to implement a type extension which I haven't done before

@Bubbler I get 16444 for np.float128 and 1074 for np.float64

is that expected?

Bubbler

sounds about right

Simd

it's all very confusing

y = np.float16(np.random.random())

c = 1
while y != 0:
    y /= 2
    c+=1
print(c)

1071

what on earth is going on?

l4m2

log2 plus a bias

Bubbler

float64 = C double = 11 exponent bits; about half of the space is used to express numbers lower than 1, so ~1024 divisions to get close enough to 0

Simd

yes.. but float16?

Bubbler

08:27

the exact number depends on things like subnormal numbers

l4m2

so y eventually convert into float64?

Simd

shouldn't float16 give a very different answer to float64?

Bubbler

what if you try with y = np.float16(1)?

(shouldn't significantly change the result but just checking)

Simd

1076

l4m2

>>> np.float16(2)**-1024
5.562684646268003e-309

Simd

08:30

ah I think numpy casts it to float64

l4m2

>>> np.float16(2**-32)
0.0

Is there a typeof in python?

Simd

In [39]: y = np.float16(1)

In [40]: np.finfo(y)
Out[40]: finfo(resolution=0.001, min=-6.55040e+04, max=6.55040e+04, dtype=float16)

In [41]: y /=2

In [42]: np.finfo(y)
Out[42]: finfo(resolution=1e-15, min=-1.7976931348623157e+308, max=1.7976931348623157e+308, dtype=float64)

Bubbler

so it seems like you need to divide by np.float16(2) instead of just 2

Simd

I then get 26

l4m2

>>> np.float16([1,2,3])*1e-8
array([0., 0., 0.], dtype=float16)
>>> np.float16([1,2,3])*1e-4
array([0.0001, 0.0002, 0.0003], dtype=float16)

Simd

08:32

numpy has its own implicit casting rules seems invented without any reference to what had been agreed in other more famous languages before

Bubbler

IEEE754 float16 has 5 exponent bits so it checks out

Simd

thanks.. no so see if I can get numba to multiply an array of np.float128s correctly!

gulp :)

l4m2

Is there IEEE754 float8 or even float4? (I know float8 and float4 exist)

Bubbler

no, smallest float type classified under IEEE754 is float16, according to wikipedia

Simd

@Bubbler what was "no" in reply to?

l4m2

08:35

@Simd I

Bubbler

^

Simd

s/no see/now to see/

but I didn't say there was a smaller float type

l4m2

Are 0xD6 L1OM opcodes only available in 64-bit to avoid confusion with SALC?

Bubbler

so ML people kinda arbitrarily invented 8-bit and 4-bit floats to train their models faster

...and I hear now that they reduced it down to just booleans

l4m2

float1 doesn't make much sense but int1 do

float2 can handle {0,1,2,4} but doesn't look like useful, though can't just claim useless like float1

Simd

08:40

that makes no sense!

they are supposed to be doing stochastic gradient descent

but what is that with a 4 bit number??

do you have any reference to them using booleans? I would be really interested in that

Bubbler

I just heard from a person who happens to work with such an AI model

Simd

ah ok. I would love to see that in practice. It's not a float!:)

Bubbler

lol yeah.

Simd

brainchip.com/4-bits-are-enough

@Bubbler arxiv.org/abs/2402.17764

Bubbler

~~AI researchers are so good at creating buzzwords for their papers~~

Simd

08:49

:)

Sandbox Posts

0

A: Sandbox for Proposed Challenges

The mail sender There are N houses and some paths in a town and. Some mails need sent from a house to another. You are now in house 1, and it's your job to send these mails as soon as possible. Output the shortest time. Test cases: (Path P1, P2, cost)... [Src, Dest]... => Cost (1,2,8) [1,2] => 8 ...

caird coinheringaahin g

09:04

@emanresuA My fork also uses arbitrary precision, to a degree. More than M does, but less than I'd like

Also, I either genuinely didn't know, or fully forgot, that it was on DSO :P
Thanks for adding it!

New Posts

0

Q: Is this a solvable Numberlink?

Challenge Per Wikipedia: Numberlink is a type of logic puzzle involving finding paths to connect numbers in a grid. The player has to pair up all the matching numbers on the grid with single continuous lines (or paths). The lines cannot branch off or cross over each other, and the numbers have t...

code-golf

Rydwolf Programs

14:58

Live Nation (Ticketmaster) just got hit by an anti-trust suit :D

Ginger

:D

Rydwolf Programs

15:17

@lyxal SE has a rebellious side, and more places to coordinate as a commubity

"Commubity" lol

My favorite part was when he said "it's commubing time" and commubed all over them

Ginger

rydwolf, check TGC

NP posted a question six times

mousetail

15:39

Does anyone else constantly press control-shift-C instead of control-C in places where that doesn't work?

Rydwolf Programs

16:36

I don't, probably since I'm used to using terminals where highlighting text automatically copies it

DLosc

It might be a bit late for this, but do y'all think Construct a uInt from an array of bits would benefit from a community wiki answer for languages where the solution is a builtin?

In skimming through the answers so far, I think I only see one that's a straight builtin. There's a couple more that are "join into string and then use builtin."

Unrelated String

17:56

4

Adám

19:00

@cairdcoinheringaahing can i give your email to the host?

Rydwolf Programs

20:18

Hey @Ginger, boy do I have good news for you

(CC @Seggan)

Ugh the image is too big

We have ceiling boot 😎

caird coinheringaahin g

@Adám feel free :)

DLosc