Published: 2025-01-14 | Origin: /r/ruby

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Published: 2025-01-14 | Origin: /r/programming

In this document, the author details their experience upgrading the Linux kernel on a Chumby 8 device from the old PXA166-based 2.6.28 version to a modern 6.x version. By part 8 of the series, all major hardware peripherals were functioning well. However, the author observed unexpectedly high CPU usage reported by the "top" command, with fluctuating readings of 100% user/system usage and rare instances of 100% idle or 0% usage

Published: 2025-01-14 | Origin: Hacker News

The passage discusses the evolution of timekeeping from natural celestial indicators, like the sun and moon, to mechanical clocks. Initially, these natural rhythms guided human activity, while later mechanical timepieces refined the concept of time. In the 17th century, tall case clocks began incorporating a representation of the lunar cycle to assist with fishing and nighttime travel, utilizing a simple mechanism with a rotating disk that displayed two moons. However, this mechanism does not accurately depict the moon's phases due to its flawed representation of

Published: 2025-01-14 | Origin: Hacker News

The article, written by Piotr Migdał, discusses the importance of understanding and utilizing vectors in data science, particularly regarding their application in artificial intelligence (AI). It draws a parallel between King Midas, who turned everything he touched into gold, and data scientists, who convert data into vectors. While vectors capture similarities between data points, the author cautions against blindly applying cosine similarity, which can lead to misleading results, such as mismatching questions and answers or focusing on superficial attributes like writing style

Published: 2025-01-14 | Origin: Hacker News

rqlite is a lightweight, open-source distributed relational database that combines SQLite and Raft, originally developed in 2014. It emphasizes reliability and quality, achieving notable robustness with fewer than 10 reported production panics over a decade of development. The testing strategy for rqlite follows the testing pyramid method, focusing primarily on unit tests at the base, which allows for efficient and precise testing of isolated components. This approach is supported by integration tests and limited end-to-end tests. Effective testing is

Published: 2025-01-14 | Origin: /r/programming

The author created a tool in TypeScript to extract level data and graphics from the Commodore 64 version of Bubble Bobble. They enjoyed revisiting familiar levels but sought to uncover more related data, such as platform graphics and monster positions, which required detailed analysis of the disassembled game binary. By using a debugger to check register values and studying the game mechanics, they discovered that platforms are represented as 1-bit bitmaps. Each level consists of 32 by 25 tiles, though only

Published: 2025-01-14 | Origin: /r/ruby

This tutorial provides a detailed guide on how to implement Single Sign-On (SSO) for web apps using SAML, Okta as the identity provider, Ruby as the programming language, and WorkOS as the authentication middleware. It covers two implementation methods: using AuthKit, a customizable login solution from WorkOS, or building a custom login interface. Key steps include adding the WorkOS Ruby SDK to your application via the Gemfile, authenticating with the WorkOS API key and client ID, and

Published: 2025-01-14 | Origin: Hacker News

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Published: 2025-01-14 | Origin: /r/programming

The author shares their experience of creating a simple model of a planet using real geographical elevation data, inspired by the aesthetics of the game Outer Wilds. The project involves projecting Earth's elevation data onto a sphere, which is a complex task requiring triangulation. Instead, the author suggests generating sample points on the sphere and querying the elevation data for them, using resources from the Wolfram Language's standard library that includes a rough map of Earth and the capability to fetch higher-resolution data online. The process involves retrieving

Published: 2025-01-14 | Origin: /r/programming

The text communicates several points regarding user feedback, project licensing, and issues encountered on GitHub. Users are encouraged to provide feedback, view documentation for qualifiers, and create GitHub accounts for further inquiries. The document outlines that the Apache 2.0 license was applicable for all past commits before a transition from open-source to a source-available licensing model, and indicates that changes in licensing should not affect existing owners or forks of the repository. There are mentions of issues related to locating the last open-source

Published: 2025-01-14 | Origin: /r/programming

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Published: 2025-01-14 | Origin: /r/ruby

The content discusses the FFaker library, a Ruby tool used for generating sample data in testing and development. It highlights its functionality, including various data types like names and credit card numbers, and notes that while the codebase is small, it features interesting elements such as metaprogramming and thread usage. The author focuses on the `FFaker::Name.first_name` and `FFaker::Name.unique.first_name` methods to explain their operation. Key points include that FFaker delays data loading until

Published: 2025-01-14 | Origin: /r/ruby

The article discusses a new feature in Ruby 3.4 that allows developers to refer to the first parameter in a block without explicitly naming it. Starting from Ruby 2.7, numbered parameters could be used within blocks, but Ruby 3.4 enhances this functionality. It highlights the behavior of block parameters in nested blocks, where Ruby resolves the reference to the innermost block's parameter. In contrast, numbered parameters can cause ambiguities if there are methods or variables with the same name in

Published: 2025-01-14 | Origin: Hacker News

The author shares their experience teaching their daughter to ride a bike using a traditional method, which proved frustrating and ineffective. After some research, the author's wife discovered a more effective technique: removing the pedals from the bike initially. This allows the child to focus on balancing by straddling the bike and running forward, then coasting. As the child gains confidence and learns to balance, the pedals can be re-attached, making it easier for them to learn to pedal and ride confidently. This method emphasizes

Published: 2025-01-14 | Origin: /r/programming

DB-Engines has named PostgreSQL as its DBMS of the Year for 2025, marking its second consecutive win and fifth overall, following previous victories in 2017, 2018, 2019, and 2023. PostgreSQL has outperformed 423 monitored database management systems, solidifying its status as the most popular choice in the past year. Released in September 2024, PostgreSQL 17 brought significant performance enhancements and expanded replication options. Following PostgreSQL

Published: 2025-01-14 | Origin: /r/programming

The author reflects on their experience implementing Conway’s Game of Life using Rust, motivated by a desire to enhance their skills and nostalgia for the GameBoy Advance (GBA) from their childhood. Facing challenges in displaying simulation output and lacking web or desktop application development expertise, they turned to GBA development, particularly after the release of a new Rust crate for the platform. While outlining the basic concepts of Conway’s Game of Life, the author emphasizes the simplicity and complexity that arise from its 2D grid

Published: 2025-01-14 | Origin: Hacker News

The content invites readers to edit an example for improvement and encourages support through donations. It acknowledges contributions from Gariany and the FFmpeg Discord Community.

Published: 2025-01-14 | Origin: /r/ruby

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Published: 2025-01-14 | Origin: /r/programming

The author shares an experience of encountering a challenging bug while using Microsoft Copilot for coding assistance in Python. The bug arose from an incorrect import statement using the "as" keyword, which allowed them to mistakenly import a Django test class with different semantics than intended. Specifically, they inadvertently imported `TestCase` instead of `TransactionTestCase`, leading to unexpected behavior in database transaction management during tests. The author highlights the consequences of this confusion and the importance of being cautious with naming conventions in imports to avoid

Published: 2025-01-14 | Origin: /r/programming

Many good programmers struggle with learning Rust and may even give up due to common mistakes. A key issue is a lack of focused learning; casually experimenting with Rust in short, scattered sessions is often ineffective. As learners encounter more complex concepts, they need to engage deeply to overcome challenges. Initial struggles are expected, but it's important to push through them, as proficiency will improve over time. To succeed, learners should familiarize themselves with Rust's core concepts, such as traits, macros, and smart pointers, preferably