A programmer used Python, OpenCV, and PIL libraries to transform movie frames into unique pieces of art. Extracting frames from videos, compressing colors, and generating barcode and circular "iris" images, the project, 'Movie Iris,' visualizes the evolution of a film's color themes. The open-sourced code can process any video, turning everyday moments into art.
Nullboard is a minimalist kanban board prioritizing compactness and readability. A single-page web app, it stores all data locally, enabling offline use with JSON import/export functionality. Featuring drag-and-drop, autosave, and undo/redo, Nullboard offers efficient task management. Born from the developer's frustration with existing tools, it's a self-built solution now shared open-source.
Retis is a powerful tool that uses eBPF probes to trace packets within the Linux networking stack. It interacts with control and data paths like Open vSwitch and Netfilter, making it invaluable for debugging network issues, exploring the Linux networking stack, or testing network features. Retis offers packet filtering and tracking, retrieving metadata and contextual information beyond the packet itself. No compilation on the target system is required, and post-processing capabilities, such as reconstructing a packet's journey, are included. User-friendly with pre-built profiles and support for custom probes and filters, Retis provides flexibility and ease of use.
Botan is a powerful, open-source C++ cryptography library released under the permissive Simplified BSD license. It aims to be the best option for cryptography in C++, offering tools for implementing various systems like TLS, X.509 certificates, modern AEAD ciphers, PKCS#11 and TPM hardware support, password hashing, and post-quantum crypto schemes. A Python binding is included, with other language bindings available. A feature-rich command-line interface is also provided. Botan 3.6.1 is the latest release and is available through many distributions including Fedora, Debian, Arch, and Homebrew.
Trofaf is a super-simple live static blog generator written in Go. Requiring only three directories (posts, public, templates), it generates a static website from markdown files and front matter, automatically updating whenever changes are detected. It offers command-line options for customization and prioritizes simplicity over extensive features, making it ideal for users seeking a straightforward blogging solution.
Fish shell, a command-line shell known for its user-friendliness and smart features, has released version 4.0. The biggest change is a complete rewrite of the codebase from C++ to Rust, resulting in improved modern computing efficiency. Version 4.0 also boasts many new features, such as more natural keybindings and enhanced history search, designed to make the command line experience easier and more enjoyable. To ensure stability, the project has released a public beta inviting all users to participate in testing.
A veteran developer with 25 years of experience expresses a growing disconnect with younger web developers. He observes a lack of understanding regarding traditional web development methods (non-single-page applications) and confusion between JavaScript frameworks and vanilla JavaScript. This prompts reflection on the evolving abstraction levels in programming education and the focus on specific skills. Using a developer game show as an example, he points out that some 'computer science' questions overly emphasize JavaScript specifics, neglecting broader computational principles. This isn't a criticism of younger developers, but an observation and concern about industry trends, and a reflection on the increasing specialization within the programming field.
Northeastern University's computer science department has developed a unique programming curriculum that emphasizes explicit and systematic program design, rather than focusing on trendy programming languages. The curriculum starts with a simple teaching language, gradually introducing students to design principles before applying them to industrial languages. This approach cultivates logical reasoning and problem-solving skills for large, complex software. The curriculum also highlights the social aspects of programming, encouraging pair programming to improve communication and collaboration. This method not only enhances students' job prospects but also lays a solid foundation for their future careers.
A software engineer unearthed an ancient text in a Mayan city, revealing 14 astonishing memory safety approaches far beyond current programming language understanding. These methods include traditional techniques like borrow checking, reference counting, and garbage collection, alongside unprecedented innovations such as region-based memory management, generational references, and linear reference counting. This discovery not only broadens our comprehension of memory safety but also foreshadows the future direction of programming languages, potentially revolutionizing software development.
Tired of static keyboard layouts? The MarkovKeyboard project revolutionizes typing! It uses a Markov chain algorithm to dynamically adjust the keyboard layout based on your typing habits, moving frequently used keys closer to the home row. This Emacs library updates the layout with each keypress. While currently supporting only letters, it dynamically adapts. You can use a pre-trained model or train your own data for a personalized layout.
Firenvim is a browser extension that seamlessly integrates the Neovim editor into Chrome, Firefox, and other browsers. With a simple click on any textarea, you can instantly edit webpage content using Neovim's powerful features. Save changes with ':w' and close the editor with ':q'. Installation is straightforward, and extensive customization options allow you to fine-tune the plugin's behavior, including element selection, auto-takeover settings, command-line options, and more. Firenvim offers advanced features such as manual triggering, temporary disabling, custom configuration, special character handling, and webpage interaction. However, be aware that compatibility issues may arise with certain websites.
yadm is a dotfiles manager based on Git, supporting system-specific alternative files or templated files and encrypting private data using tools like GnuPG and OpenSSL. It offers customizable initialization and hooks for executing custom scripts before and after any operation. Features include adding, committing, encrypting, and decrypting files, and creating OS-specific configurations. Project address: https://github.com/yadm-dev/yadm
Reservoirs Lab is a lightweight Electron app that connects directly to a Postgres database to visualize high-dimensional vector embeddings stored alongside structured data. Users can interactively explore their data and see correlations between metadata and the semantic similarity of vector embeddings. Features include Postgres integration, vector visualization, neighborhood exploration, and a local, privacy-preserving workflow.
The Perl Advent Calendar 2024 features a unique video presentation by Randal Schwartz, titled 'Half My Life with Perl'. Randal, a Perl veteran, recounts his journey with the language from its early days to the modern era, including his involvement in creating the Camel and Llama books, and his humorous anecdotes of conquering the comp.unix.questions forum with Perl 2. This marks the first time a video has been included in the Perl Advent Calendar, offering a fresh and engaging perspective on the language's history.
This GreptimeDB blog post delves into their error handling practices within large Rust projects. It details how they built a cheaper, more accurate error stack to replace system backtraces, how they organize errors in large projects, and how they present errors differently to logs and end-users. GreptimeDB leverages the snafu crate for error management and implements a "virtual user stack." This approach proves more efficient and memory-friendly than system backtraces, providing clearer, more understandable error messages for both developers and end-users.
Piccolo OS is a small multitasking operating system designed for the Raspberry Pi Pico, primarily as a teaching tool. It demonstrates the fundamentals of a cooperative multitasking OS and the Arm Cortex-M0+ architecture. Tasks are scheduled in a simple round-robin fashion, using MSP and PSP stack pointers for context switching and transitioning between Thread and Handler modes. While simplified in functionality, it clearly illustrates core multitasking OS principles, making it ideal for learning about operating system internals.
ScyllaDB announced it's transitioning its flagship product, ScyllaDB Enterprise, from closed-source to a source-available license, offering a free tier with full enterprise capabilities. This simplifies their dual release stream, providing greater community value. The future involves a single release stream, consolidating core features for improved performance and efficiency; examples include 30X faster node addition/removal via file-based streaming and workload prioritization for balancing multiple workloads on a single cluster. While potentially unpopular with some open-source users, ScyllaDB believes this change benefits the company and accelerates progress on roadmap milestones like Raft for data, optimized tablet elasticity, and tiered (S3) storage.
This article challenges the common misconception about modern computer memory—the RAM myth—that assumes memory access is always random and uniform. By analyzing data sharding algorithms, the author demonstrates that simple linear algorithms are inefficient for large datasets due to frequent cache misses. To address this, an optimized strategy based on radix sort is proposed. Techniques like pre-sorting data, using generators, and pre-allocating memory significantly improve data sharding efficiency. Experimental results show that the optimized algorithm achieves a 2.5 to 9x speedup when processing large datasets.
After two years of development, the MoonBit compiler, including its Wasm backend, is now open source! MoonBit aims to be a WebAssembly-optimized programming language, known for its speed, compactness, and ease of use. This release uses a modified SSPL license, allowing users to freely choose the license for their generated artifacts and permitting modifications to the compiler for non-commercial purposes. The team chose this license to maintain stability while the project is still in beta and to prevent large cloud vendors from misusing their work. In the future, MoonBit plans to open source more components and generate revenue through hosting services and hardware SDKs, aiming to build a vibrant community ecosystem.
sqleibniz, a static SQL analysis tool for the SQLite dialect, has been enhanced with Lua scripting for increased configurability and extensibility. The author details the integration using the mlua crate in Rust, covering data structure conversion, Lua function calls, and error handling. Lua scripts allow users to define custom rules and hooks, enabling flexible static analysis such as customized diagnostics and style checks. This significantly improves sqleibniz's extensibility and user experience.
Musoq is an open-source project enabling developers to query diverse data sources like files, directories, and images using SQL-like syntax, without needing a database. It boasts a plugin architecture supporting various data sources including file systems, archives, Git repositories, C# code, Docker and Kubernetes resources, and even integrates with AI models like OpenAI and Ollama for advanced analysis. Musoq aims to simplify data querying, boosting developer efficiency, especially for ad-hoc queries on smaller to medium-sized datasets. While employing SQL-like syntax, it's not fully SQL compliant; prioritising user-friendly syntax and efficient execution.
Solaar is an open-source Linux device manager for many Logitech keyboards, mice, and other devices connecting wirelessly via Unifying, Bolt, Lightspeed, or Nano receivers, as well as many Logitech devices connecting via USB cable or Bluetooth. It's not a device driver; it responds to special messages from devices otherwise ignored by the Linux input system. Solaar supports pairing/unpairing devices with receivers, configuring device settings, custom button configurations, and running rules in response to special messages from devices. Installation options include pre-built packages and source code compilation.
K8s Cleaner is a Kubernetes cluster cleanup tool designed for administrators. It efficiently identifies and removes unused resources to boost cluster performance and reduce operational costs. Supporting all resource types, including CRDs, it offers pre-defined rules and customizable options (time-based, label-based, or custom Lua scripts). Notifications are sent via Slack, Email, and more, while a dry-run mode prevents accidental changes. K8s Cleaner streamlines Kubernetes resource management.
This article explores the surprising effectiveness of Java for small programs, particularly scripting and exploratory programming. The author details how Java's features, like implicit classes, records, and enums, simplify code, highlighting the ease of running Java scripts without compilation (using JEP 330 and JEP 458). Managing external dependencies with JBang is also discussed. The article further delves into using Java within Jupyter Notebooks, acknowledging current limitations while expressing hope for future improvements in the ecosystem. The author's experience automating tedious tasks showcases Java's strength over alternatives like bash scripting and Python, emphasizing the advantages of static typing and robust tool support.
BlackSheep is a fast asynchronous ASGI web framework for Python, inspired by Flask, ASP.NET Core, and the work of Yury Selivanov. It offers a CLI for rapid project bootstrapping, supports automatic binding, dependency injection, OpenAPI documentation generation, and various authentication and authorization strategies. BlackSheep boasts broad platform and runtime compatibility, and features middleware, WebSocket, SSE, static file serving, and Jinja2 integration, making it ideal for building high-performance web applications.
GitHub Copilot is an AI-powered pair programmer that provides real-time code suggestions based on your code and natural language prompts. It supports multiple programming languages and IDEs, offering free and paid plans to suit various needs. Copilot boasts powerful debugging and security vulnerability fixing capabilities, along with multi-file editing and cross-platform support. While trained on public code repositories, it doesn't copy-paste code but generates suggestions probabilistically, offering an optional code referencing filter to mitigate copyright concerns.
Zipshare offers seamless Android screen sharing, perfect for internal help desks supporting retail staff or field employees. No signup or meeting IDs are needed for the screen sharer – just instant sharing, with the option to add your own voice or video chat. Created by Miso Software, Zipshare is a simple yet powerful tool for team collaboration.
Every time you tap your card or pay online, you're interacting with the ISO 8583 protocol. This 1987 standard defines the format of real-time transaction messages between banking networks. It includes core fields like message type indicators, bitmaps, and data elements, but networks vary in their extensions and serialization, leading to compatibility challenges. This article delves into the complexities of ISO 8583's structure, field encoding, nested message handling, and demonstrates building a robust ISO 8583 parser to handle network variations and error scenarios.
The Castle Game Engine team announced updates including a web target (using JS+WebAssembly for browser-based game execution), support for the IFC (Industry Foundation Classes) format, and collaborative editing using mORMot2. The web target currently handles basic functions and is improving WebGL support. IFC support allows loading, modifying, and saving models, with future enhancements planned. Collaborative editing is still under development but already enables 3D world modification and server synchronization.
Brisk is a modern, cross-platform C++20 GUI framework built for creating responsive, high-performance applications with ease. Leveraging an MVVM architecture and reactive capabilities, Brisk boasts scalable GPU-accelerated rendering, making it ideal for graphics-intensive projects. It supports multiple backends (D3D11, D3D12, Vulkan, OpenGL, Metal, WebGPU) and features declarative GUI, stylesheets, and full Unicode support. Currently under active development, contributions are welcome.