Published: 2025-04-16 | Origin: /r/ruby

The article by Roman Samoilov, Tech Lead at SoftServe, introduces Rage, a Ruby web framework aimed at creating fast and developer-friendly APIs. Rage seeks to modernize the Ruby ecosystem by offering a syntax similar to Rails while emphasizing asynchronous I/O, performance, and easy OpenAPI documentation generation. The article outlines a tutorial for building a shared Todo list application using Rage. It covers the necessary steps, starting from project setup with SQLite, generating models and migration files, and defining data relationships. It

Published: 2025-04-16 | Origin: Hacker News

The content discusses the "Damn Vulnerable Model Context Protocol" (DVMCP), an educational project that intentionally presents vulnerabilities within the Model Context Protocol (MCP). It features 10 progressively challenging scenarios aimed at highlighting different security weaknesses and attack vectors relevant to MCP implementations. The project serves as a learning tool for security researchers, developers, and AI safety professionals. Additionally, it provides resources such as setup guides, challenge descriptions, and solution guides, encouraging users to first attempt the challenges independently before

Published: 2025-04-16 | Origin: /r/programming

The author reflects on a recent blog post about hash tables and discovers a new technique called "Fibonacci Hashing" from a comment by Rich Geldreich. Despite their extensive experience with hash tables, the author realizes that Fibonacci Hashing is a significant improvement over traditional methods, which often use prime number sizes and integer modulo for slot mapping. They argue that Fibonacci Hashing is not widely adopted, leading to slower performance in large hash tables, including common implementations like std::unordered_map. The author notes that

Published: 2025-04-16 | Origin: /r/programming

Janne Hellsten's post from August 18, 2019, summarizes a coding competition focused on creating a minimal C64 executable that draws two lines to form a specified image. Participants submitted their programs (PRG files) along with the byte-length and an MD5 hash, shared via Twitter replies and direct messages. The post provides a participant list with links to their source codes and highlights various coding tricks used in the submissions, especially those relevant to 6502 assembly language. The C64

Published: 2025-04-16 | Origin: /r/programming

IntelliJ IDEA 2025.1 introduces comprehensive support for Java 24 and makes K2 mode the default for an enhanced Kotlin development experience. Key features include enhanced debugging capabilities, powerful code completion, and the integration of JetBrains AI, which now offers free access to various AI tools within the IDE under a streamlined subscription model. This version boosts productivity with smarter code completion and support for new cloud models, while also integrating stable tools like stream gatherers into the workflow. Overall, the update focuses

Published: 2025-04-16 | Origin: Hacker News

On February 12, 2014, Darwin Day was celebrated, marking the 205th anniversary of Charles Darwin's birth. Much of his work is accessible online, including through platforms like Darwin Online and the Darwin Manuscripts Project at the American Museum of Natural History. This project features his personal notes and illustrations, including some remarkable nature drawings related to his seminal work, "On the Origin of Species." Among his manuscripts, there are intriguing drawings, some attributed to his children. One notable illustration,

Published: 2025-04-16 | Origin: /r/ruby

The post discusses how to use SQL subqueries in a Rails application to enhance performance by eliminating N+1 queries. It highlights the common task of fetching a single record from a has_many association, such as the latest comment, order, or activity, which can lead to performance issues when dealing with many associated records. While eager loading with `includes` can prevent N+1 queries, it often results in high memory usage since all associated records are loaded into memory. Instead, the post proposes a

Published: 2025-04-16 | Origin: /r/programming

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Published: 2025-04-16 | Origin: /r/ruby

The content discusses how to set up an older Ruby (2.1) and Rails (4.0) application on an Apple Silicon Mac using a Visual Studio Code development container. The author faced challenges with installing an older version of OpenSSL on a newer Ubuntu image and ensuring compatibility within an ARM Linux container, along with some complications related to RVM permissions. Despite these issues, the author successfully configured a .devcontainer/Dockerfile to run the application, which has also worked for a colleague.

Published: 2025-04-16 | Origin: /r/ruby

Thomas Riboulet discusses the importance of authentication in web applications, specifically within the Ruby on Rails ecosystem, which lacks a built-in authentication layer. He highlights Devise as a popular solution due to its extensive features and plugins, but notes that it operates separately from applications. An alternative approach is presented through Authentication Zero, which offers configurable scaffolding for authentication that adheres to security best practices. This solution is preferred over building authentication from scratch due to potential security concerns. Authentication Zero simplifies key aspects like user

Published: 2025-04-16 | Origin: Hacker News

The author expresses frustration with the complicated terminology and writing style in statistics, particularly when it comes to Markov Chain Monte Carlo (MCMC) methods. They find the language used in descriptions, such as the abstract from the Encyclopedia of Biostatistics, to be unnecessarily jargon-filled and difficult to understand, even for someone who is familiar with the subject. The author believes that complex terminology is often not needed for basic explanations and aims to provide a simpler explanation of MCMC. They liken MCMC to

Published: 2025-04-16 | Origin: Hacker News

MITRE announced that its contract with the Department of Homeland Security (DHS) to maintain the Common Vulnerabilities and Exposures (CVE) database will expire on April 16, 2025. This decision has raised significant concerns among cybersecurity experts, including Sasha Romanosky from the Rand Corporation, who described the potential end of the CVE program as "tragic." Romanosky emphasized that the CVE system is essential for tracking software vulnerabilities and making informed decisions about security. Ben

Published: 2025-04-15 | Origin: /r/programming

When creating shaders, SIMD code, or GPU kernels, a fast and efficient random number generator (RNG) is often sufficient, rather than a cryptographically secure one. An ideal RNG for these applications should be quick, straightforward, possess decent statistical properties without obvious patterns, handle floating-point numbers effectively, and be compatible with SIMD and GPU programming. The article introduces LCG-XS, an algorithm that meets these requirements by combining a linear congruential generator (LCG) with an xorshift

Published: 2025-04-15 | Origin: Hacker News

The author emphasizes the importance of feedback in developing LLM-powered software and invites contributions to an open-source project called "12-factor agents" available on GitHub. The author, Dex, has explored various AI agent frameworks and noticed many marketed as "AI agents" lack genuine agentic qualities, often relying on deterministic code. The goal is to establish effective principles for building reliable and maintainable LLM-powered software, highlighting that even with advancements in LLMs, core engineering techniques will remain crucial. The

Published: 2025-04-15 | Origin: Hacker News

Robots are increasingly handling manual tasks on dairy farms, such as milking, feeding, and cleaning, which eases the workload for farmers and improves the well-being of cows. In a barn equipped with these autonomous robots, cows can choose to be milked at their convenience, leading to increased comfort and a 10% boost in milk production. Jan Jacobs, a design lead at Lely, a company specializing in agricultural machinery, explains that happier cows, facilitated by robotic care, lead to higher

Published: 2025-04-15 | Origin: /r/ruby

The article provides readers with practical implementations in C, Rust, and Ruby for adding Gaussian noise to images, similar to a referenced GIF. It emphasizes hands-on coding over theoretical reading and invites readers to subscribe for upcoming content focused on reversing the diffusion process with a neural network. The target audience includes programmers looking to understand the forward and backward passes of Stable Diffusion in low-level languages. The article outlines a structured approach that starts with the fundamental concepts of diffusion models, then moves into coding, specifically generating the

Published: 2025-04-15 | Origin: /r/programming

A customer reported a long-standing issue with their application's UI thread hanging, which they couldn't diagnose. The kernel dump didn't show the user mode stack because it had been paged out due to the thread being hung. Notably, the UI thread was found to be suspended for over five hours, causing the hang. Upon investigation, it was discovered that the customer had a watchdog thread that periodically suspends the UI thread to capture its stack trace. The watchdog thread was observed in the middle of this stack

Published: 2025-04-15 | Origin: /r/programming

The content discusses a Python package called TARIFF, which humorously aims to impose import tariffs on foreign Python packages. It emphasizes the goal of making importing more expensive to promote domestic code usage. The message conveys a parody tone, suggesting that importing has become unfair and urges users to "make importing great again." The document also encourages feedback while directing users to the official documentation for more details on available qualifiers.

Published: 2025-04-15 | Origin: Hacker News

The content discusses a full-featured logic programming system, analogous to Prolog, that is embedded in and callable from Clojure. It emphasizes expressive power and execution transparency, aimed at facilitating rapid prototyping and proof-of-concept development, although it may not be the fastest option available. The system utilizes a Lispy syntax and supports logical variables, allowing for complex terms in assertion statements and answer templates. Key features include: - Clojure-based syntax with logical variable capabilities. - Various logical predicates

Published: 2025-04-15 | Origin: Hacker News

As of April 15, 2025, Google Advanced users can create high-resolution, eight-second videos using the new Veo 2 video generation model. This feature is part of Gemini and is available to Google One AI Premium subscribers. Users can generate videos from text-based prompts or images through the Whisk Animate tool. Veo 2 produces realistic, fluid animations by understanding real-world physics and human movement. To create videos, users select Veo 2 in Gemini and provide a detailed scene