Published: 2024-12-27 | Origin: Hacker News

The PolyDye Full Color 3D Printer Mod enhances Marlin-based 3D printers by incorporating inkjet printing technology to achieve vibrant full-color outputs. This modification layers ink between white filament, adding color to models. Currently in beta, the software will receive regular updates and additional features over the coming months. The project includes assembly and calibration guides, as well as a list of necessary hardware. Acknowledgments are given to contributors who helped make this project possible, with further updates promised in the

Published: 2024-12-27 | Origin: Hacker News

The MODEL 777 project originated in a high school architecture class where the creator initially used manila file folders to model building ideas. Inspired by the versatility of paper, the creator decided to challenge themselves by modeling a Boeing 777 airplane. Starting in mid-2008, the project has undergone multiple revisions, evolving into a detailed representation of the aircraft. To ensure accuracy, the creator gathers source material, including photos, videos, and technical drawings. This research aids in understanding the shape and function of each

Published: 2024-12-27 | Origin: /r/programming

The author shares their experience with Advent of Code, a yearly event in December that involves solving daily programming puzzles inspired by Christmas-related themes. This year’s focus was on locating the Chief Historian, linking the event to notable moments from past years. The author, originally from Germany, draws a parallel between Advent of Code and traditional Advent Calendars, which typically contain chocolates to celebrate the countdown to Christmas. They appreciate Advent of Code as an opportunity to fill gaps in their computer science knowledge, particularly in areas

Published: 2024-12-27 | Origin: /r/programming

In Python, exceptions can be linked to provide clarity about errors through the `raise [Exception] from [cause]` syntax. This feature helps to show the relationship between exceptions when one occurs during the handling of another. However, it may sometimes clutter stack traces and make them harder to comprehend. To address this, Python offers `raise Exception from None`, allowing developers to suppress exception chaining, resulting in simpler and clearer stack traces. By default, when an exception occurs in an `except` block

Published: 2024-12-27 | Origin: /r/ruby

The content emphasizes the importance of user feedback and describes a feature for checking version upgrades when updating a repository. This feature prevents the creation of a new release with an outdated version in the code. Users can pass an optional regex for version strings and must specify a filename containing the version to verify updates. The default regex is /[v]\d.\d.\d/ (e.g., v1.0.0), and users can test their regex formats on rubular.com. Additionally, it provides

Published: 2024-12-27 | Origin: /r/ruby

In September 2023, Ruby introduced Gem::SafeMarshal to enhance the safety of deserialization when processing .gem files. This feature can be accessed via `rubygems/safe_marshal` or `Gem.load_safe_marshal`, and offers two methods: `safe_load` (with a limited, hardcoded list of permitted items) and `load` (which allows the specification of permissible classes and symbols). The implementation posed challenges, as Ruby's Marshal does not provide built-in restrictions like

Published: 2024-12-27 | Origin: /r/programming

The content covers several topics, including insights into interviewing at Jane Street, details about their internship program, and various technical discussions involving OCaml. 1. **Interviewing and Internship**: There are posts related to the experiences and processes of interviewing for positions at Jane Street, as well as information on their internship program. 2. **Technical Topics**: - Usage of ASCII waveforms for hardware testing. - Detection of memory leaks using Memtrace. - Availability of OCaml with Jane

Published: 2024-12-27 | Origin: /r/programming

The blog discusses the concept of "confident LLMs" (large language models) and their tendency to express certainty even when they produce incorrect information, also known as hallucinations. This confidence is attributed to the instruction tuning process that models undergo after initial training. The writer mentions a prior experiment ranking Hacker News users based on their suitability for a software engineering role and notes that less sophisticated models typically hesitate to make definitive choices, often asserting that both options are equally good or bad. This raises the question

Published: 2024-12-27 | Origin: /r/ruby

The content discusses best practices for building an effective caching system for backend web applications, focusing on API response caching with JSON and using Redis. Key points include: 1. **Cache Structure**: Instead of a single cache for all data (like shopping cart, order status, and user profile), it's beneficial to split the cache into separate entities. This reduces the number of cache invalidations and improves the cache hit ratio, as more stable data (like user profiles) won’t be invalidated by frequent changes

Published: 2024-12-27 | Origin: Hacker News

Quiver is a modern, graphical editor for creating and editing commutative and pasting diagrams online. It allows users to efficiently draw high-quality diagrams that can be exported to LaTeX via tikz-cd, significantly speeding up the process compared to manual LaTeX coding. The interface is intuitive and supports complex diagram elements like pullbacks, pushouts, and adjunctions, utilizing a flexible grid for object placement and a variety of arrow styles with color options. Users can create and modify

Published: 2024-12-27 | Origin: Hacker News

The text describes the enduring legacy of the Inca Empire's remarkable road system, exemplified by a single grass bridge that is rewoven annually. It recounts a ceremonial event featuring Victoriano Arizapana, who prepares for a dangerous task while honoring mountain spirits. He carefully descends onto four braided cables suspended over a 30-meter chasm above the Apurimac River, balancing to connect them into a stable structure. The narrative captures the blend of ancient traditions, spiritual beliefs, and

Published: 2024-12-27 | Origin: Hacker News

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Published: 2024-12-27 | Origin: /r/programming

The content discusses a tool designed to convert eBooks into audiobooks while including chapters and metadata. It utilizes AI models and voice cloning, supporting over 1,100 languages. Users are reminded that the tool should only be used with non-DRM, legally acquired eBooks, and they bear responsibility for any misuse. Instructions are provided for running the conversion script in both headless and interactive modes, detailing commands and options for specifying language codes and voice files. Additionally, there's an option to use Docker

Published: 2024-12-26 | Origin: Hacker News

The SHARE IT Act (H.R. 9566), signed into law by President Joe Biden, mandates federal agencies to share custom-developed code to avoid redundant software development expenses, which are estimated at $12 billion annually. Sponsored by bipartisan legislators, including Senators Ted Cruz and Gary Peters, and Representatives Nicholas Langworthy and William Timmons, the law requires agencies to publicly list and share their custom code, excluding classified or privacy-sensitive information. Agency chief information officers must establish policies within 180 days for implementing

Published: 2024-12-26 | Origin: Hacker News

The content discusses the challenges of clustering algorithms used by software engineers for tasks like grouping similar users or categorizing content. While tools like k-means and DBSCAN are commonly employed, the article emphasizes a fundamental flaw in all clustering algorithms, as highlighted by Jon Kleinberg in a 2002 paper. Kleinberg proved that it is mathematically impossible for clustering algorithms to satisfy three desired properties simultaneously: scale invariance, richness, and consistency. This limitation can be likened to the CAP theorem in distributed

Published: 2024-12-26 | Origin: Hacker News

The content discusses the text rendering approach utilized by Use.GPU in WebGPU, which offers limited browser compatibility, recommending Chrome on Windows or Mac for the best experience. The rendering technique involves the use of Signed Distance Fields (SDFs), addressing common inaccuracies in generating SDFs from masks. SDFs represent the distance to a shape's edge and provide crisp, anti-aliased graphics. The process involves creating a gradient that distinguishes inside and outside areas before enhancing contrast to produce a precise opacity

Published: 2024-12-26 | Origin: Hacker News

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Published: 2024-12-26 | Origin: Hacker News

The content discusses the common feeling of inadequacy many aspiring programmers experience, particularly when comparing themselves to established developers of popular software. It proposes that creating a simple Unix shell in C, named lsh, can help boost confidence in one's programming skills. The walkthrough aims to inspire others to take on similar projects, with the source code available on GitHub. However, it warns university students against copying the code for class assignments without permission. The article outlines the basic structure of a shell, emphasizing that its

Published: 2024-12-26 | Origin: Hacker News

In this tutorial by Justin Meiners and Ryan Pendleton, readers are guided on how to create a virtual machine (VM) capable of running assembly language programs. The project is suitable for those with some programming knowledge who want to deepen their understanding of computer operations and programming language mechanics. The final implementation consists of approximately 250 lines of C code, and the tutorial is presented in a literate programming style, intertwining code snippets with detailed explanations. The tutorial covers the fundamental role of a VM, which

Published: 2024-12-26 | Origin: /r/programming

The content discusses the experience of debugging a complex multi-threading bug that occurred in a workplace, highlighted by the quote, "It's better to know nothing than to have half-knowledge." The narrator faced an issue in which multiple users encountered ambiguous column name errors in MySQL due to improperly formed queries that seemed nonsensical. Initially, the narrator examined error logs for patterns and noted that the problematic queries contained random and illogical table joins. They suggested that this could be a bug in the query