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Sha256 Algorithm Explained

Sha256 algorithm explained online step by step visually

Rob Pike

Expert advice anyone? I was surprised to see complex libraries in Go, and then in C, return a negative zero for the imaginary part of the result of cos(0+0i). The sign of imaginary zeros for real arguments seems unpredictable. Is it? See github.com/golang/go/issu… for context.

The mathematically optimal Wordle strategy

An excuse to teach a lesson on information theory and entropy. Help fund future projects: https://www.patreon.com/3blue1brown​ Special thanks to these supporters: https://3b1b.co/thanks An equally valuable form of support is to simply share the videos. Note, the way I wrote the rules for coloring while doing this project differs slightly from the real Wordle when it comes to multiple letters. For example, suppose in a word like "woody" the first 'o' is correct, hence green, then in the real Wordle that second 'o' would be grey, whereas the way I wrote things the rule as simply any letter which is in the word somewhere, but not in the right position, will be yellow. To be honest, even after realizing this differed from the proper rule, I stuck with it because it made the computation of the full matrix of word-combination patterns more elegant (and faster), and the normal rule has always slightly bothered me. Of course, it doesn't make any difference for the actual lesson here on entropy, which is the primary goal, and at least as I've gone back tried rerunning some of the models with the correct convention, it doesn't really change the final results. Contents: 0:00 - What is Wordle? 2:43 - Initial ideas 8:04 - Information theory basics 18:15 - Incorporating word frequencies 27:49 - Final performance Original wordle site: https://www.powerlanguage.co.uk/wordle/ Music by Vincent Rubinetti. https://www.vincentrubinetti.com/ Shannon and von Neumann artwork by Kurt Bruns. Code for this video: https://github.com/3b1b/videos/blob/master/_2022/wordle.py These animations are largely made using a custom python library, manim. See the FAQ comments here: https://www.3blue1brown.com/faq#manim https://github.com/3b1b/manim https://github.com/ManimCommunity/manim/ You can find code for specific videos and projects here: https://github.com/3b1b/videos/ ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe: http://3b1b.co/subscribe Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3blue1brown Reddit: https://www.reddit.com/r/3blue1brown Instagram: https://www.instagram.com/3blue1brown_animations/ Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown

New sponsors-only repositories, custom amounts, and more | The GitHub Blog

Along with the release of sponsors-only repositories, here’s a look at what’s new and what’s next for Sponsors.

proposal: doc: update Go memory model · Issue #50859 · golang/go

In June 2021 I posted a series of articles about memory models, ending with an article about changes I thought we should make to the Go memory model. See https://research.swtch.com/mm especially ht...

Experimental chill

Я редко делюсь ссылками, но тут прям невозможно устоять https://ciechanow.ski/gps/ Дизайн системы GPS, от спутников, как 3-4 из них пересекают ваши координаты до мелких деталей как хранятся данные и как считывают сигнал и его расшифровывают. Много интерактива, много деталей, много дизайн решений, читается на одном дыхании, как книжку прочитал! С восхитительным малым количеством пересылаемых данных со спутников мы имеем достаточно неплохую систему навигации (понятное дело, данные аккумулируются со временем, но всё равно!) The data rate at which GPS satellites send their signals is astonishingly small – they transfer only 50 bits every second. At that rate sending just the text contents of this article would take almost 2.5 hours. This means that a single subframe consisting of 10 words, each occupying 30 bits, takes 6 seconds to transfer and a single frame is received over 30 seconds. Интервью от дизайнера GPS (1999) вызывают прям дичайшее уважение. После прочтения хочется, чтобы все системы в мире продумывались…

GitHub - silentbicycle/greatest: A C testing library in 1 file. No dependencies, no dynamic allocation. ISC licensed.

A C testing library in 1 file. No dependencies, no dynamic allocation. ISC licensed. - GitHub - silentbicycle/greatest: A C testing library in 1 file. No dependencies, no dynamic allocation. ISC li...

Changes in the Core Team | Rust Blog

Empowering everyone to build reliable and efficient software.

Please make a dumb car

Today’s cars are dumb where they should be smart, and smart where they should be dumb. Enough already. Make a car that’s pretty much all dumb and watch it sell — because what automakers are giving people is so bad, they’ll pay more to have less of it. Cars now are like budget smartphones with […]

Monorepo Explained

Everything you need to know about monorepos, and the tools to build them.