Published: 2025-07-08 | Origin: /r/programming

The content encourages users to review the Terms of Service and Privacy Policy. By continuing, users agree to these terms and have the option to opt out by clicking a provided link. The message assures users that their personal information will not be sold or shared for advertising purposes, though they may still see interest-based ads from third parties. It invites users to stay updated with personalized news. The copyright notice indicates all rights are reserved for Bennett, Coleman & Co. Ltd.

Published: 2025-07-08 | Origin: /r/programming

The content discusses the role and importance of reverse proxies in distributed systems, such as in service mesh, load balancing, and edge proxy configurations. It highlights popular reverse proxies like HAProxy, Nginx, Envoy, and others, noting their specific strengths in different contexts. The primary function of a reverse proxy is to enable communication between clients and origin servers, with a focus on Layer 7 (HTTP) operations. Key functionalities of reverse proxies include HTTP request parsing, service discovery, and observability

Published: 2025-07-08 | Origin: /r/ruby

Rails applications that handle multiple requests need efficient database connection management to avoid overwhelming the database server. Connection pooling is the solution, as creating new connections for each request is resource-intensive and unsustainable. ActiveRecord provides a built-in connection pool, which retains a set of reusable connections instead of generating new ones for every request. It's important to note that each Rails process operates with its own connection pool, so if you run multiple Puma workers, each will have a separate pool. When a thread needs a database connection

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: Hacker News

The Gemini API has introduced a new Batch Mode designed for high-throughput, non-latency-critical workloads. Users can submit large jobs, which will be processed asynchronously, with results available within 24 hours and offered at a 50% discount compared to synchronous APIs. This feature is ideal for tasks where data is pre-prepared and immediate responses are not necessary, providing three key benefits by offloading large jobs from real-time processing. The API is user-friendly, allowing developers to package requests into a

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

Recall.ai operates a unique workload, recording millions of hours of meetings monthly, producing extensive data in audio, video, and structured formats like transcriptions and metadata. This structured data is written to a Postgres database by tens of thousands of simultaneous "meeting bots." However, this write-heavy workload caused Postgres to stall due to a bottleneck in its LISTEN/NOTIFY feature, which acquires a global lock during transaction commits, leading to serialization of all commits. Between March 19-22

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

The ChompSaw, created by designers Kausi Raman and Max Liechty, is a safer tool for kids to use for cutting projects, specifically designed to cut cardboard. It functions as a nibbler with an oscillating cutter protected beneath a puck-like cover, preventing any finger contact. The tool collects cuttings in a bin for recycling, and it costs $250. The author reflects on their own childhood experiences with tools, emphasizing the importance of safety and the potential legal liabilities associated with

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.