Live data from Hacker News

Every V4 UUID

everyuuid.com

371–380 of 381 posts

Re: Every V4 UUID

#372

What percentage of the 100+ Zettabytes of data now on the internet does this page take up?

Around 9,400,000,000,000,000,000%

Thanks! I guess strictly you'd have to include this page, which would put the total internet data in the (roughly) ronnabyte or quettabyte range, with nearly all of it being this page.

Re: Every V4 UUID

#373

I spent far too much time being childish with this, but I am quite pleased that: 69420694-2069-4206-9420-694206942069 is a valid UUID.

you just need to set the two metadata positions to specific values, the rest are all valid

xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx

M = 4

N = 8,9,a,b

x = 0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f

Re: Every V4 UUID

#374
post #182

I tried to find the biggest UUID and if I got it right, it's 99999999-9999-4999-9999-999999999999 (note the 4 in the 3rd block) I'm curious why it's not 99999999-9999-9999-9999-999999999999 (all 9s)?

[deleted]

Re: Every V4 UUID

#375
post #142

Earlier quoted context omitted.

Memorable UUIDs? I think you're on to something here! (Also, dibs on 00000000-0000-4321-abcd-000000000001!)

The most offensive sentence I could come up with leetspeak/hexspeak is this one: fe11a710-babe-4150-ace5-b19b1accd1cc (Yes it's a valid UUID) (I am so sorry)

Wow, that's offensive, especially the last part. Good job!

Re: Every V4 UUID

#376
post #367
post #239

Earlier quoted context omitted.

Penn only agreed to the "Red Ball" trick after Teller hit on the idea to tell the audience how it works at the start. https://lasvegasweekly.com/news/2008/nov/20/man-ball-hoop-be... https://www.thisamericanlife.org/619/transcript https://www.youtube.com/watch?v=dhnATlPdG6A Here they are showing how they do ball & cups by using clear cups and it's no less amazing: https://www.youtube.com/watch?v=8osRaFTtgHo

I love these and my kids who are a little obsessed with stage magic right now are at the perfect age for Penn & Teller videos so I need to stash these for the next time I have them. There’s definitely skill levels involved, even at the professional level (and Penn & Teller are definitely among the best out there). We’ve been to two professional magic shows in the last year, one in Wisconsin Dells, the other in Lake G…

Ricky Jay (RIP) is also extraordinary and has a handful of videos on YouTube. His stuff is mostly with cards and his humor is more aimed at adults. One of my favorites is his appearance on Arsenio Hall (I wish this was better quality):

https://www.youtube.com/watch?v=7jKuHiY397U

You gotta watch to the end. Arsenio bends a card when Ricky looks away and thinks he can follow it that way but... well, just watch. :-)

One of his shows (with some fancy card throwing):

https://youtu.be/z7InE1zXAY4

Documentary:

https://www.youtube.com/watch?v=iWM4qQWwnu0

Re: Every V4 UUID

#377
post #376
post #367

Earlier quoted context omitted.

I love these and my kids who are a little obsessed with stage magic right now are at the perfect age for Penn & Teller videos so I need to stash these for the next time I have them. There’s definitely skill levels involved, even at the professional level (and Penn & Teller are definitely among the best out there). We’ve been to two professional magic shows in the last year, one in Wisconsin Dells, the other in Lake G…

Ricky Jay (RIP) is also extraordinary and has a handful of videos on YouTube. His stuff is mostly with cards and his humor is more aimed at adults. One of my favorites is his appearance on Arsenio Hall (I wish this was better quality): https://www.youtube.com/watch?v=7jKuHiY397U You gotta watch to the end. Arsenio bends a card when Ricky looks away and thinks he can follow it that way but... well, just watch. :-) One…

Yeah, Ricky Jay was the last of a breed (he was also a friend of a friend, something I only learned after both he and the friend had died). He was very schooled in a lot of the street con games and was also a scholar of historical frauds and cams. He published a small-circulation magazine with his researches in the latter.

And of course his appearances in various David Mamet–related properties were not to be missed.

Re: Every V4 UUID

#378

Earlier quoted context omitted.

My first thought was to use linear transformations over Z_2 as a field, as that would create a natural interpretation of fixing certain bits as taking a linear subspace. Interestingly this leads to the property that XOR is preserved. I implemented this in a very quick and hacky way for 32 bits. I generated a random boolean matrix M invertible in Z_2. To turn an input number x into a corresponding number y in an N-bit…

I did some fooling around with this and it seems promising. The first problem is that, when your enciphering function is a matrix, f(0) = 0. This looks bad, but we can easily solve that problem by starting the webpage sequence at an index higher than 0. I tried to work through a much smaller version of the problem* by hand, and it looks like this: We have our enciphering matrix N: [[1 1 1 1 1] [1 0 0 1 1] [1 1 1 0 0]…

Can you solve this in general without doing integer linear programming? How else would you know how to find the lowest index greater than the current? In the field GF(2), using 0 might not minimize.

Re: Every V4 UUID

#380
post #124

I'd like to announce my new `npm` package called `get-uuid`. Behind the scenes, it loads `everyuuid.com`, picks a random row number, and returns that UUID.

That's a terrific idea, I'll also create a npm package, that consumes yours and returns the Guid but without the '-' between the digits. Go code reuse!

> That's a terrific idea

I think you meant 'terrific' in the old original meaning.

Post reply on HN