Published: 2025-07-07 | Origin: /r/ruby

The content compares a Ruby program to a kitchen with a single chef, illustrating how threads allow for concurrent execution similar to having multiple chefs. A thread is created using `Thread.new`, enabling independent task handling. The Global VM Lock (GVL) restricts Ruby to one executing thread at a time, but during tasks like network requests or file I/O, the GVL is released, allowing other threads to run. Race conditions can arise when multiple threads access the same data, which can be managed using

Published: 2025-07-07 | Origin: Hacker News

The content provided appears to be a fragment of a PDF file encoded in binary format. The document structure includes metadata references, objects, and a stream of binary data, potentially representing formatted text or images. However, the actual text content and its meaning are not discernible, as it is encoded. PDF files typically contain a combination of text, images, and other media elements, but due to the binary nature of this excerpt, no coherent summary of meaningful content can be extracted.

Published: 2025-07-07 | Origin: /r/programming

The author expresses hesitation in warning organizations in Belgium about vulnerabilities due to a negative experience with coordinated vulnerability disclosure (CVD). While unable to discuss specifics, they emphasize the importance of CVD in promoting overall security by responsibly sharing information about vulnerabilities. The process involves coordination to ensure that disclosures are handled appropriately and do not pose additional risks. The author aims to raise awareness about the challenges of engaging in CVD in Belgium, suggesting that potential disclosers should be cautious and aware of what to expect.

Published: 2025-07-07 | Origin: Hacker News

The content discusses a secure, decentralized peer-to-peer messaging app that operates over Bluetooth mesh networks, requiring no internet or servers, just enabling encrypted communication. It emphasizes the importance of user feedback and provides instructions for setting up the project in Xcode, including installing XcodeGen, generating the project, and running it on a target device. The app utilizes an efficient binary protocol optimized for Bluetooth LE, and details about this protocol can be found in the provided Technical Whitepaper. Additionally, the project is in

Published: 2025-07-06 | Origin: Hacker News

To enhance user experience, a special "Apple key" was added to the keyboard, allowing users to invoke menu commands directly through keyboard shortcuts, similar to the Lisa computer. This key, when pressed with another key, selected the corresponding command, and an Apple logo was displayed next to each menu item that had an associated keyboard command to reinforce the connection.

Published: 2025-07-06 | Origin: Hacker News

Lion Cove is Intel’s new high-performance CPU architecture, succeeding Raptor Cove. It offers improvements such as increased instructions per cycle, restructured execution engines, and an additional data cache level. These enhancements lead to notable performance gains in the SPEC CPU2017 benchmark suite, especially in higher IPC categories. In the Arrow Lake platform, Lion Cove competes well against AMD's Zen 5 and performs better than Raptor Cove, all while consuming less power. For gaming performance, tests were conducted using

Published: 2025-07-06 | Origin: /r/programming

Let’s Encrypt has announced that it has issued its first certificate for an IP address, a feature that has been frequently requested since its inception in 2015. Previously, only a few certificate authorities offered the ability to obtain certificates for IP addresses. This new option will be gradually rolled out to more subscribers over time. IP addresses serve as the fundamental numerical identifiers for devices on the Internet, with both IPv4 and IPv6 formats. While users typically interact with domain names, IP addresses are used behind the

Published: 2025-07-06 | Origin: Hacker News

The rise of "therapy-speak" is negatively impacting how we discuss romance, relationships, and personal identity. This therapeutic culture categorizes and labels every personality trait as a problem, making individuals feel that their natural behaviors and feelings are indicative of disorders. A survey showed that a significant portion of Gen Z girls view mental health challenges as part of their identity, a stark contrast to Boomers. This trend reflects a broader modern tendency to explain all aspects of human behavior through psychological and scientific frameworks. Consequently,

Published: 2025-07-06 | Origin: Hacker News

The author expresses a passion for working on the Rust compiler, specifically focusing on a significant project this summer: bootstrapping the Rust compiler using `cg_gcc` instead of LLVM. Bootstrapping refers to the compiler build process, which consists of three stages. Initially, they use a pre-existing LLVM-based Rust compiler to build a GCC-based code generator. Subsequently, they rebuild the Rust compiler using this GCC codegen, and for verification, they compile it again to ensure both builds produce identical execut

Published: 2025-07-06 | Origin: Hacker News

Crypto 101 is a free introductory course on cryptography designed for programmers of any age and skill level. It covers essential concepts like SSL/TLS, block and stream ciphers, hash functions, message authentication codes, public key encryption, key agreement protocols, and signature algorithms. The course also teaches how to exploit common cryptographic weaknesses, enabling learners to perform tasks such as forging administrator cookies and recovering passwords. Originally presented at PyCon 2013, Crypto 101 has evolved into a comprehensive resource that

Published: 2025-07-06 | Origin: /r/programming

The author presents a challenge related to adding a new column, `utr_number`, to a transaction table containing approximately 1 billion records. The `utr_number` needs to be reconciled with values obtained from an API that responds in about 100 ms and has rate limits of 10,000 calls per minute, along with potential uptime issues. To tackle the problem, the author suggests a batching approach: loading and processing records in manageable groups of 5,000 to avoid overwhelming the database and to

Published: 2025-07-06 | Origin: Hacker News

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Published: 2025-07-06 | Origin: /r/ruby

Ruby 3.4 introduces the `it` parameter as a clearer alternative to numbered parameters like `_1`, specifically for single-argument blocks. This change aims to improve code readability while maintaining performance. The adoption of the `it` parameter was driven by concerns over the cognitive load associated with remembering numbered parameters. The Ruby core team addressed potential conflicts, particularly with RSpec's `it` method, by gradually rolling out the feature: Ruby 3.3 will issue warnings, while 3

Published: 2025-07-06 | Origin: /r/programming

A security researcher, Sharon Brizinov, discovered sensitive information in deleted GitHub commits, including a personal access token that granted admin access to all Istio repositories, which are crucial for many enterprises. This discovery led to around $25,000 in bounties. The investigation highlighted the challenges developers face when they accidentally commit sensitive data (like passwords) and later attempt to delete those commits. Git's design preserves commit history, and while developers can use a force push to rewrite history to remove the

Published: 2025-07-06 | Origin: /r/programming

The author discusses a solution for synchronizing JavaScript/React state management across multiple Tauri processes (windows) using the Zustand library. While developing an application called Hopp, they faced challenges with state management in a multi-window environment, where both the main control panel and a separate window for screen-sharing needed to share and sync state. Instead of managing state purely on the backend to maintain reactivity, they opted for a loosely synced approach to avoid excessive complexity and ensure that components remained reactive without being burden

Published: 2025-07-06 | Origin: /r/programming

Open Policy Agent (OPA) is a powerful tool for enforcing Kubernetes policies, providing precise control to keep clusters secure and consistent. While Kubernetes allows for code-based resource management, it lacks built-in mechanisms to detect errors in configurations, which can lead to security vulnerabilities. OPA addresses this by enabling administrators to define and enforce admission control checks that ensure resource definitions adhere to specified criteria, helping to prevent configuration errors and maintain consistency within Kubernetes environments. OPA operates using a policy-as-code approach, allowing users to write

Published: 2025-07-06 | Origin: /r/programming

The July 2025 release of C3, version 0.7.3, focuses on refining the language, particularly its compile-time components. Key improvements include enhanced ways to inspect and manipulate types through direct type use and typeid values, allowing constant typeids to be used directly for implicit type conversion. This change simplifies macro code by eliminating the need for converting typeids to types, leading to clearer syntax. Additionally, the $assignable builtin has been updated to accept both types and typeids

Published: 2025-07-06 | Origin: /r/programming

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Published: 2025-07-06 | Origin: /r/programming

TUIKit is a C++ framework for creating rich and interactive Terminal/User Interfaces (TUIs), inspired by the Qt framework and based on FTXUI. It is particularly suited for scientific and engineering applications, providing a familiar development experience. The framework includes core components and supports the embedding of JSON UI definitions (.tuik files) into binaries, with examples and usage guidelines available. Developers can clone the repository, install dependencies, configure CMake, and build the project to run provided examples. Contributions to the

Published: 2025-07-06 | Origin: Hacker News

The excerpt discusses the uncertainty people felt about why objects remained on the ground and why celestial bodies like the moon did not fall to Earth. This uncertainty was addressed in Isaac Newton's 1687 work, "Philosophiæ Naturalis Principia Mathematica," which explained fundamental principles of motion and gravity. The book, funded by Edmund Halley, provided a scientific framework that replaced vague beliefs about gravity with clear laws that could predict the behavior of objects, both large and small. Newton's laws have