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System Design: Building TikTok-Style Video Feed for 100 Million Users

Published: 2025-05-21 | Origin: /r/programming

The article discusses the widespread consumption of video content, with the average person spending over two hours daily on platforms like Instagram, YouTube, and TikTok. It explores the technology and strategies that enable these platforms to effectively capture and maintain user attention, including personalized video recommendations and seamless transitions between videos. The author aims to provide insights into the engineering behind video feed platforms by proposing a system design approach to create a video feed product that allows user interactions such as likes, shares, and comments. The piece serves

The WinRAR Approach

Published: 2025-05-21 | Origin: Hacker News

The content discusses a new approach to distributing wallpapers on a website that has been free and ad-free for five years, despite increasing operational costs due to significant growth in visitor numbers. To maintain sustainability, the site now offers a purchase option for wallpaper collections, allowing users to instantly download an entire set with one click. However, all wallpapers remain available for free download without ads or exclusives. The approach is likened to WinRAR, which offers a trial experience while encouraging users to support the site if they

Show HN: Lipu sona – Toki Pona Learn the language of simplicity

Published: 2025-05-21 | Origin: Hacker News

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Convolutions, Polynomials and Flipped Kernels

Published: 2025-05-21 | Origin: Hacker News

The post discusses the process of multiplying polynomials and the relationship to convolution sums. It begins with the traditional method of cross-multiplying polynomials and collecting terms, then introduces a more systematic approach using a table to visualize how coefficients correspond to specific terms in the output. The table highlights the necessary diagonals that combine to form each term's coefficient. The text then shifts to an abstract representation of polynomials as sums of coefficients multiplied by powers of x. When two polynomials, P and R

“ZLinq”, a Zero-Allocation LINQ Library for .NET

Published: 2025-05-20 | Origin: Hacker News

ZLinq v1 was released last month, achieving zero allocations through the use of structs and generics. It includes features such as LINQ to Span, LINQ to SIMD, and support for various platforms like .NET Standard 2.0, Unity, and Godot. With over 2000 GitHub stars, ZLinq aims to provide practical LINQ functionality, overcoming limitations seen in previous struct-based implementations, such as assembly size bloat and performance issues. The library offers comprehensive

GitHub wants to spam open source projects with AI slop

Published: 2025-05-20 | Origin: /r/programming

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Why Good Programmers Use Bad AI

Published: 2025-05-20 | Origin: /r/programming

Namanyay Goel reflects on the use of AI in code generation, acknowledging that while it is often deemed error-prone, many in the tech industry, including CEOs and investors, advocate for its adoption. Despite recognizing the flaws and inefficiencies of AI coding tools, Goel underscores their necessity within a business context. He shares insights from his experience as a programmer, noting that while individual developers may prioritize code quality, businesses focus on timely delivery and revenue generation. Goel identifies areas where AI can

The Guide to Hashing I Wish I Had When I Started

Published: 2025-05-20 | Origin: /r/programming

Hashing is a principle that may seem complex but is fundamentally straightforward. It involves a one-way function that takes any type of input—such as strings, numbers, or files—and produces a fixed-size output, typically in binary format. The output size remains constant regardless of the input size. For example, a hash of the string "hello" could generate a 4-bit output, illustrating how diverse data can be transformed into a uniform size through hashing algorithms. Although hashing has many intricacies, its

Litestream: Revamped

Published: 2025-05-20 | Origin: Hacker News

Litestream is an open-source tool designed to enhance the reliability of full-stack applications using SQLite by enabling data recovery through object storage. Developed out of a desire to simplify application deployment without the burden of managing traditional, heavyweight databases like Postgres or MySQL, Litestream continuously streams database updates from SQLite to an S3-compatible storage, ensuring data can be restored efficiently if needed. Launched in 2020, Litestream proved successful, leading to the development of LiteFS, which offers advanced features like

Resisting the Rush: Why Careful Planning Beats Quick Coding

Published: 2025-05-20 | Origin: /r/programming

In the tech startup environment, there is a strong emphasis on delivering products quickly, often valuing speed over thoughtful design. This "move fast and break things" mentality can lead to software that is fragile and difficult to maintain, turning initial quick wins into costly technical debt. The rise of AI-powered development tools may further encourage bypassing essential design phases, as they allow for the rapid generation of code. However, good software engineering requires careful architecture and understanding of interactions among components, which are crucial for long

Gemma 3n preview: Mobile-first AI

Published: 2025-05-20 | Origin: Hacker News

The recent launches of Gemma 3 and Gemma 3 QAT mark advancements in open models designed for running on cloud or desktop accelerators. The focus is now on expanding the capabilities of on-device AI for everyday devices like phones and laptops. A new architecture, developed in collaboration with mobile hardware leaders such as Qualcomm, MediaTek, and Samsung, optimizes for fast, multimodal AI applications, including advancements in Gemini Nano. Gemma 3n, the first open model based on

Veo 3 and Imagen 4, and a new tool for filmmaking called Flow

Published: 2025-05-20 | Origin: Hacker News

On May 20, 2025, a new suite of generative media models was announced, including Veo 3, Imagen 4, and a filmmaking tool called Flow. These advancements aim to enhance creative expression across various media, allowing artists to produce stunning images, videos, and music. Veo 3 stands out with its ability to generate videos that include audio elements, such as ambient sounds and dialogue, while also improving text and image prompting capabilities. This model will be available to Ultra

Iterator helpers have become Baseline Newly available

Published: 2025-05-20 | Origin: /r/programming

The article discusses the recent introduction of iterator helpers in JavaScript, which allows developers to use functional programming methods like map, filter, and reduce on iterables without converting them to arrays. This is particularly useful for handling infinite datasets, such as those generated by generator functions. The iterator helpers are defined on the prototype of the Iterator object, enabling efficient operations on iterable sources. Examples include filtering DOM nodes based on their innerText and using generator functions to filter and log specific values, highlighting the practical benefits of

Rust turns 10: How a broken elevator changed software forever

Published: 2025-05-20 | Origin: /r/programming

ZDNET’s recommendations are derived from extensive testing, research, and comparisons, utilizing data from various sources including vendor listings and customer reviews. While ZDNET may earn affiliate commissions from purchases made through their links, this does not influence their editorial content or pricing. Their editorial team aims to provide accurate information and helpful advice to assist readers in making informed purchasing decisions. They prioritize thorough fact-checking and encourage users to report any inaccuracies. The content also mentions Graydon Hoare, a Mozilla developer who created

Reports of Deno's Demise Have Been Greatly Exaggerated

Published: 2025-05-20 | Origin: /r/programming

On May 20, 2025, Deno addressed recent criticisms regarding its products and overall momentum, acknowledging that some concerns are valid due to a lack of communication about the company's direction. However, they emphasized that Deno is not fading away; in fact, since the release of Deno 2 six months prior, its adoption has more than doubled, thanks to improved compatibility with Node.js. Deno's capabilities have expanded, leading to increased utilization. One major point of concern has been the

Cheat sheet on method argument types and order [OC]

Published: 2025-05-20 | Origin: /r/ruby

The provided content appears to be a binary data representation, likely from a PNG (Portable Network Graphics) file, rather than textual content meant for summarization. It includes binary chunks that are characteristic of image files, such as "IHDR" (the header chunk), "IDAT" (the data chunk), and other binary sequences. Since it's not composed of readable text, it cannot be summarized into a coherent format in the way typical text can. If you're looking for information regarding PNG files or need

Clojuring the web application stack: Meditation One

Published: 2025-05-20 | Origin: Hacker News

The blog post "Clojuring the web application stack: Meditation One" by Aditya Athalye, published on August 24, 2024, explores the architecture of web frameworks and web applications, particularly in the context of Clojure. Athalye emphasizes the importance of understanding both web framework and application architecture due to the absence of a dominant web framework in the Clojure ecosystem. The post serves as an extensive guide for those familiar with Clojure and web development, offering

A simple search engine from scratch

Published: 2025-05-20 | Origin: /r/programming

The author, along with Chris, created a blog search engine using word embeddings, specifically employing the word2vec method, which maps words onto a 300-dimensional space that reflects their meanings. They followed a blog post detailing how to train a mini word2vec to understand its internals. The search engine works by embedding each blog post through the sums of the embeddings of its words and then embedding search queries similarly. Posts are ranked based on the cosine similarity of their embeddings to the search query, which

Notes on file format design

Published: 2025-05-20 | Origin: /r/programming

The author discusses the considerations involved in designing file formats, emphasizing the importance of understanding the specific goals of the files. They suggest evaluating existing formats before creating a new one, particularly for common needs like image files, which often have established solutions. However, for specialized requirements (e.g., a custom LCD's 4-bit color format), a custom format might be necessary. The author also points out that using complex systems (like SQLite) or serialization features in programming languages has its advantages and disadvantages. They

I got fooled by AI-for-science hype–here's what it taught me

Published: 2025-05-20 | Origin: Hacker News

Nick McGreivy, a physicist who recently earned a PhD from Princeton, shares his experience with AI in physics research. Initially optimistic about AI's potential to accelerate the field, he became disillusioned when he found that AI techniques, specifically those meant to solve partial differential equations (PDEs), did not perform as well as expected. Despite claims from various studies that AI could outperform traditional numerical methods by significant margins, McGreivy observed that these comparisons were often misleading. His attempts to