Published: 2025-06-17 | Origin: Hacker News

The author describes an experience of downloading Linux ISOs using qBittorrent and discovering that many of the trackers were inactive. This led them to consider acquiring a dead domain for a tracker to see how many clients would connect. Trackers are essential for connecting peers in the BitTorrent protocol, but their centralization can be problematic if they go offline. While there's an alternative called Mainline DHT for decentralized peer lookups, it has its limitations, including reliance on bootstrap nodes and vulnerability to attacks.

Published: 2025-06-17 | Origin: /r/ruby

The post discusses how to inspect the order of before, after, and around callbacks in Rails controllers by creating an initializer. This is helpful for understanding callback sequences in complex applications with deep controller hierarchies or multiple shared concerns. The author learned this technique while debugging a complicated controller. To implement this, a new initializer should be added to the initializers directory, which creates three methods for each controller class that return arrays of the corresponding callbacks in their execution order. The internal mechanism relies on Rails'

Published: 2025-06-17 | Origin: /r/programming

For nearly 30 years, JPEG has been the primary image format for sharing digital photos on the Internet, despite not being the original format used by early web browsers, which only supported GIFs. The JPG format was introduced in the mid-90s with Netscape and quickly gained traction due to its advantages, such as better degradation of image quality, which allowed it to scale better for various uses, from slow dial-up connections to high-end photography. Crucially, JPEG was developed as a documented standard

Published: 2025-06-17 | Origin: Hacker News

On June 17, 2025, Honda R&D Co., Ltd. successfully conducted a launch and landing test of its experimental reusable rocket in Taiki Town, Hokkaido, Japan. The rocket, measuring 6.3 meters in length and weighing 900 kg dry (1,312 kg wet), reached an altitude of 271.4 meters before landing within 37 cm of its target after a flight duration of 56.6 seconds. This test was aimed at demonstrating essential technologies

Published: 2025-06-17 | Origin: Hacker News

Tiger Cloud offers a robust PostgreSQL cloud solution tailored for various workloads, including time series data, real-time analytics, and AI applications. The service provides support options to fit different use cases and budgets, alongside tools and extensions for enhancing PostgreSQL performance. Industries that rely on Tiger Cloud benefit from its security and reliability features. The platform also features educational resources such as documentation, articles, tutorials, and benchmarks to help users optimize their PostgreSQL experience. Users can engage with community forums and subscribe to updates via

Published: 2025-06-17 | Origin: /r/ruby

The article by Paweł Dąbrowski emphasizes the importance of implementing encryption in applications, particularly for handling Personally Identifiable Information (PII). Since Rails version 7, Active Record Encryption is included, which simplifies the encryption process. The article provides a detailed guide on migrating existing database columns to encrypted versions in a Rails 8.0.2 application using PostgreSQL, focusing on a User model with attributes like email and date_of_birth. The setup involves generating configuration values for encryption,

Published: 2025-06-17 | Origin: /r/programming

In 1951, postgrad student Corrado Böhm achieved an impressive feat by creating a complete compiler by hand, without the aid of a compiler or a computer, which were not readily accessible at the time. Böhm devised a minimal programming language that allowed only assignment operations and handled non-negative integers. He utilized a special symbol for jumps (π) and for input/output (?). Despite its simplicity, the language enabled the creation of functional programs. Notably, the compiler was succinctly written in

Published: 2025-06-17 | Origin: /r/programming

The content discusses the challenges of triangle-triangle intersection algorithms, noting that no single implementation adequately addresses all edge cases due to varying requirements across applications like gaming, CAD, and physics engines. The author proposes a robust method suitable for CAD systems, structured similarly to a previous post on point-in-triangle determination. The algorithm is divided into two phases: **Phase 1:** Check if all vertices of triangle B are on the same side of triangle A's plane. If so, no intersection occurs,

Published: 2025-06-17 | Origin: /r/programming

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Published: 2025-06-17 | Origin: /r/ruby

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Published: 2025-06-17 | Origin: /r/ruby

The provided content appears to be a snippet from a PDF file, specifically its internal coding structure as defined by the PDF format. It includes information such as object references, metadata, and file structure elements typical of PDF documents, but without any readable content or context related to the main subject matter of the PDF, making it impossible to summarize further or derive meaningful information about its content.

Published: 2025-06-17 | Origin: /r/ruby

The content announces a podcast that releases new episodes on the first and third Tuesdays of each month, focusing on Ruby, Rails, JavaScript, and related topics. Each episode addresses three questions: what the hosts are working on, what challenges they are facing, and something cool they want to share. A key feature discussed is Vladimir Dementyev's (Vova) innovative project that enables Ruby on Rails to run entirely client-side via WebAssembly (WASM). This project aims to make it easier for newcomers

Published: 2025-06-17 | Origin: /r/ruby

The content discusses the concept of abstraction, using the example of explaining the cause of an old man's death. Multiple explanations, such as "died of a heart attack" or "died of old age," are valid depending on the level of detail desired. Abstraction is the process of simplifying complex information by focusing on higher-level descriptions, which results in an abstraction—a model representing some aspect of the world at a certain level of detail. The text further illustrates this by contrasting two programs: one

Published: 2025-06-17 | Origin: /r/programming

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Published: 2025-06-17 | Origin: Hacker News

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Published: 2025-06-17 | Origin: Hacker News

The content discusses the evolution of biological modeling and AI in scientific research, emphasizing how they contribute to modern biology. It begins with the quote "All models are wrong, but some are alive," highlighting advances such as virtual bacteria and AI-driven treatment recommendations. It traces the origins of this scientific journey back to 1952, when Alan Hodgkin and Andrew Huxley developed equations to describe and predict nerve activity, marking a significant shift in understanding life through mathematical modeling. After decades of stagnation due to

Published: 2025-06-17 | Origin: Hacker News

The content is a brief note about a simulation created in JavaScript by Justin Greisiger Frost. It mentions that users can use the keys 0-9 or click buttons to switch between demos. The copyright is attributed to Justin Greisiger Frost for the years 2021-2025.

Published: 2025-06-17 | Origin: /r/programming

The author shares their perspective on using Generative AI tools for coding, emphasizing that while they are not outright against AI, they find these tools ineffective for increasing productivity. They argue that the main issue is that reviewing AI-generated code takes as much, if not more, time than writing code themselves, as they need to ensure understanding and confidence in modifying it. The author references a common saying in the industry about the difficulty of reading versus writing code, underscoring their point that reviewing unfamiliar code is a

Published: 2025-06-17 | Origin: Hacker News

In "The Humble Programmer," Edsger W. Dijkstra reflects on his entry into the programming profession in 1952, noting that he may have been the first programmer in the Netherlands. He discusses the slow emergence of programming as a recognized field and shares a pivotal conversation with his boss, A. van Wijngaarden, regarding the legitimacy of programming as a profession. Dijkstra expresses his initial doubts about its intellectual respectability compared to the physical sciences, feeling a lack of foundational knowledge to

Published: 2025-06-17 | Origin: Hacker News

In a blog post dated June 16, 2025, Nolan Lawson discusses the challenges of prioritizing web accessibility for developers under tight deadlines. While many advocates emphasize the moral imperative of making the internet accessible to disabled individuals, Lawson suggests this approach is often ineffective in changing behavior. Instead, he offers personal reasons for building accessible user interfaces (UIs) based on self-interest. He emphasizes that accessible design makes it easier to debug web applications, as clearer hierarchies and naming conventions help developers navigate