デジタル生命？ Googleの研究者らが「自己複製するプログラム」の自然発生を確認【研究紹介】 - レバテックラボ（レバテックLAB）
生命の起源と人工生命の研究分野は、生命の本質とその発生過程を探求している。両分野とも、「非生命」の状態から「生命」がどのように生まれるかを問うている。生命が出現するほとんどの基質に共通する特徴の一つは、自己複製が始まると同時に、その系の動態が大きく変化することである。 しかし、自然界で自己複製体がどのように発生したかについていくつかの仮説はあるものの、自己複製体が出現するための必要条件については、まだほとんど解明されていない。 研究チームは、単純なプログラミング言語や命令セットを用いて、計算環境における自己複製能力を持つプログラム（自己複製プログラム）が自然発生する過程を詳細に観察し分析した。この研究の中心となったのは、「Brainfuck」（BF）という極めて単純な言語を拡張した「Brainfuck Family」（BFF）と呼ばれる言語環境である。BFFでは、64バイトの長さを持つ13
How to review code effectively: A GitHub staff engineer’s philosophy
As a staff engineer at GitHub, code review is one of my main focus areas in my day to day work. Over the past eight years, I’ve reviewed more than 7,000 pull requests. Why so many? Because code review is crucial to building good software and another set of eyes can often spot issues you would have otherwise missed. I see code review as one of the most important aspects of my job. In fact, whenever
Types as Interfaces
For the past few days, I have been toying with an idea for a board game. To test it out, I wanted to write a simple implementation of it. Here’s an example of a type we might need in a critical phase of the game. -- | A quote for a proposal. data Quote = Quote { _proposal :: Proposal , _premium :: Int , _share :: Int } In that phase, values of this type need to be communicated back and forth betwe
What the New York Times Missed: 71 More of the Best Books of the 21st Century
Susanna Clarke, Jonathan Strange & Mr. Norrell (2004) I should not have been surprised that the NYT list skewed heavily away from genre fiction—but missing Susanna Clarke’s world-changing doorstopper of a debut is a particular head-scratcher. On paper, the book still seems daunting in an almost comical way: a Regency-era epic (with footnotes and extensive digressions on philosophy, magic, politics
An Introduction to Asynchronous Programming in Rust and a High-level Overview of Tokio's Architecture
An Introduction to Asynchronous Programming in Rust and a High-level Overview of Tokio's Architecture Asynchronous programming allows the development of services that can handle millions of requests without saturating memory and CPU utilization. Support for asynchrony is usually baked into the programming language; we take a look at async support in Rust, a type-safe and memory-safe systems progra
Highlights from Git 2.46
The open source Git project just released Git 2.46 with features and bug fixes from over 96 contributors, 31 of them new. We last caught up with you on the latest in Git back when 2.45 was released. Before we get into the details of this latest release, we wanted to remind you that Git Merge, the conference for Git users and developers is back this year on September 19-20, in Berlin. GitHub and Gi
A Mini Monitor for a Pi
This post outlines how I used a small 2 inch display as a monitor for my pi. Where it can display tty terminals and X desktops and applications as if it was a normal screen connected over hdmi. My overall goal is to have a sort of handheld “console” that I can connect a keyboard to and use as a normal computer. This post implements the display functionality needed to fulfill part of the goal. I la
Primitive Recursive Functions For A Working Programmer Aug 1, 2024 Programmers on the internet often use “Turing-completeness” terminology. Typically, not being Turing-complete is extolled as a virtue or even a requirement in specific domains. I claim that most such discussions are misinformed — that not being Turing complete doesn’t actually mean what folks want it to mean, and is instead a stand
Foundry competition heats up in three dimensions and with novel technologies as planar scaling benefits diminish. The three leading-edge foundries — Intel, Samsung, and TSMC — have started filling in some key pieces in their roadmaps, adding aggressive delivery dates for future generations of chip technology and setting the stage for significant improvements in performance with faster delivery tim
Beyond Clean Code
There’s also a YouTube Video for this post. Optimization Programming can be an emotional rollercoaster. This isn’t externally obvious as we impassively look at our screens and tap on the keyboard, but inside it’s sometimes a tumultuous ride. And no software engineering endeavor produces more twists and turns than optimization. The dynamic range of possible outcomes of an optimization session are v
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Primitive Recursive Functions For A Working Programmer
Intel Vs. Samsung Vs. TSMC