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

The author shares their journey of building ProjectionLab, a side project that grew into a profitable business generating $1,000,000 in annual recurring revenue within four years. Inspired by the financial independence movement, the author started crafting a tool for personal finance after finding existing options unsatisfactory. The road to success wasn't smooth; it involved numerous challenges, including doubts, canceled subscriptions, and consideration of leaving entrepreneurship for a corporate job. Key lessons learned include the significance of persistence, emotional resilience in the face of

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

In the CVPR 2025 paper by Pascal Chang, Sergio Sancho, Jingwei Tang, Markus Gross, and Vinicius Azevedo from DisneyResearch|Studios, the authors explore the concept of anamorphosis, where images are deliberately distorted and only become recognizable from a specific viewpoint. Although such optical illusions date back to the 17th century, they typically lose meaning when viewed normally. The paper introduces a novel approach using latent rectified flow models to create anamorphic images that

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

The content discusses the development of a spatial-temporal map of human history, which utilizes a compact SQLite database for storage. The project emphasizes the importance of user feedback, directing readers to documentation for additional qualifiers. It leverages Wikidata's vast structured knowledge dataset, which consists of items and properties represented through statements in a specific format. Items of historical significance are prioritized, while static objects and recurring events are omitted. To efficiently import data, the JSON format is used, and a compression technique reduces import

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

Rails 8.1 introduces a new feature that allows developers to mark unused associations as deprecated, which helps in safely identifying and removing them without risking the stability of the application. Previously, removing an association necessitated extensive manual checks to prevent breaking existing code. The new deprecation system provides detailed warnings when deprecated associations are accessed, and it supports three reporting modes: logging warnings, throwing exceptions, or publishing notifications. This feature enhances Rails' association handling by adding deprecation checks in various components of Active Record

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

Quanta Magazine recently reported on significant advancements in the sphere-packing problem, a mathematical challenge focused on efficiently arranging spheres in high-dimensional spaces. This problem has intrigued mathematicians for centuries and has applications in various fields including cryptography and communication. The issue was famously tackled in the 17th century by Johannes Kepler, who proposed that the optimal packing of spheres in three dimensions fills about 74% of space. However, only recently has this been rigorously proven, and the quest continues in higher

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

The upcoming Lean 4.22 release features a new verification infrastructure aimed at proving properties of imperative programs. The post illustrates this feature by tackling the task of finding two distinct integers in a list that sum to zero. For instance, the list [1, 0, 2, -1] returns true because \(1 + (-1) = 0\), while [1, 0, -2] returns false. The initial approach uses nested loops, leading to inefficient quadratic time

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

The author recounts an experience of a failed production deployment due to a PostgreSQL restriction, specifically while trying to create a unique index. Although the feature performed well in test and staging environments, a problem arose during deployment when the row size exceeded the limit for the B-Tree index. The error indicated that a row of 3456 bytes was too large for the PostgreSQL index size limit of 2700 bytes. The author explains that PostgreSQL enforces uniqueness by efficiently comparing new entries against existing

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

The author critiques React for two major issues: excessive caching and excessive mutability, which complicate its use, especially at larger scales. The author's experience of nearly eight years developing complex web applications using React informs these criticisms, motivated by a desire to explain why React seems complicated and prone to bugs. The author also critiques JavaScript for not compensating well for these issues. Caching, as highlighted by the author, should be minimized in software design due to the challenges inherent in cache invalidation. React,

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

The article discusses less common target platforms for Go programming, noting that while many developers typically work with amd64 architectures on Windows or Linux and arm64 on Mac, building for arm64 on Linux or Windows is rarer. It highlights Go's strength in networking and network services, mentioning resources for running Go applications as systemd services on Linux and BSD. The author cites personal experience with a Ubiquiti EdgeRouter 8, which operates on EdgeOS, a Debian fork, to illustrate the broader

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

The author describes the challenges encountered while implementing PDB (Program Database) parsing for TypeSystemRust, highlighting a series of unexpected complexities. Issues such as inadequate documentation, unclear naming conventions, and cryptic implementations were prominent throughout the process. Despite these hurdles, the author successfully integrated PDB, enabling TypeSystemRust to work with executables targeting both *-gnu and *-msvc, marking significant progress toward its completion. The post signals a shift toward improving the debugging experience in Rust, with interest

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

Morph is an AI tool designed to improve the reliability and speed of code edits by allowing developers to make "lazy" modifications, which reference existing, unmodified lines of code. This method contrasts with traditional approaches that require extensive rewrites or risky search-and-replace tactics. Morph uses a Fast Apply model to quickly implement these changes, making them production-ready. Morph offers two Fast Apply models—morph-v3-fast and morph-v3-large—capable of processing over 4,500 and

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

The content is a guest collaboration by Jesper Christiansen, focusing on a pattern that improves the development experience with Hotwire applications in Ruby on Rails. The author shares their frustrations with using turbo_streams and partials, noting the difficulty in managing DOM IDs and passing data. They propose a different approach using a user card component that displays user information and allows the sending of introduction emails. This component updates its state to reflect ongoing processes via Hotwire's refresh functionality. The author illustrates how to implement this

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

Pocket is shutting down, which prompted the author to analyze nearly 900 saved articles accumulated over seven years. While using an AI tool named o3 to create a profile based on these articles, the author sought insights regarding demographics, preferences, and personal details such as age, geographic location, education, and political orientation. o3 provided a detailed response after analyzing themes and sources from the saved articles. The results were surprisingly accurate, revealing personal information that wasn't initially apparent, highlighting how much can be inferred from

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

arXivLabs is a platform enabling collaborators to create and share new features on the arXiv website, emphasizing values such as openness, community, excellence, and user data privacy. arXiv partners only with those who adhere to these principles. Users with project ideas that could benefit the community are encouraged to explore arXivLabs. Additionally, individuals can receive status notifications about arXiv's operational status via email or Slack.

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

The content presents a curated collection of tech-related resources, including episodes focused on infrastructure, hardware, and software. It features non-instructional videos, articles on software, and tutorials aimed at enhancing the learning experience. The invitation to connect suggests openness to discussions and questions on these topics. Additionally, there is a mention of "Quality Ruby Screencasts" as a specific resource.

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

The content discusses using multi-spectral satellite imagery in conjunction with large language models (LLMs) and contemporary remote sensing technologies. This approach harnesses the analytical capabilities of LLMs to enhance the interpretation and utilization of satellite data for various applications.

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

Bert Hubert discusses the state of advanced cloud services in Europe, highlighting strengths in hardware operations and software development, particularly in open source. However, he notes a significant gap in the availability of higher-level cloud service providers that businesses need. While European companies can leverage existing hardware and software, they face challenges in modifying software to create scalable and profitable business solutions. Hubert suggests that cooperation among European companies could facilitate the development of high-quality, cloud-service-ready software. He advocates for creating a portfolio of such software

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.