Published: 2024-11-06 | Origin: Hacker News

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Published: 2024-11-06 | Origin: Hacker News

The content discusses using ImHex, an advanced hex editor with a built-in pattern language, to analyze a custom binary file format based on a provided specification. The author shares their previous approach of writing Python code to parse the format and contrasts it with their experience using ImHex. The integrated domain-specific language (DSL) allows users to define structures and decode data easily, featuring a syntax that resembles C++ and Rust. Key features of ImHex include the ability to create complex patterns through nested structures,

Published: 2024-11-06 | Origin: /r/programming

Postgres manages memory using structures called MemoryContexts, which simplify memory management by automatically freeing memory when the corresponding arena is freed. Key considerations when using MemoryContexts are determining the appropriate context for object allocation and deciding when to create a new MemoryContext. To illustrate their usage, the author proposes building a small HTTP server and web framework as a Postgres extension, although this approach is not recommended for production use. The project will involve approximately 500 lines of code and aims to explore the functionality of Memory

Published: 2024-11-06 | Origin: Hacker News

“Passport Photos” examines the often overlooked genre of passport photography, which is characterized by strict regulations that limit personal expression—such as facing the camera directly, having a clear background, avoiding glare on glasses, and prohibiting smiles. The series aims to challenge these conventional requirements by exploring different ways one might express themselves while taking an official document photo.

Published: 2024-11-06 | Origin: /r/ruby

Ruby 3.3.6 has been released as a routine update that includes minor bug fixes and eliminates warnings regarding missing default gem dependencies intended for Ruby 3.5. The next stable release, Ruby 3.3.7, is expected on January 7th, 2024, although an earlier release may occur if significant issues arise. The release has been made possible thanks to contributions from various committers, developers, and users. For detailed information, users can refer to the release

Published: 2024-11-06 | Origin: /r/ruby

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Published: 2024-11-06 | Origin: /r/ruby

The content discusses the TTY::Link component of the TTY toolkit, which facilitates hyperlink support in terminal applications. It describes how to install TTY::Link, create a hyperlink instance, and use the `link_to` method to output clickable links in terminals that support them. For terminals that do not support hyperlinks, a plain text URL is displayed. The document explains that TTY::Link automatically detects terminal capability for hyperlinks using the `link?` method, and allows for this detection to be

Published: 2024-11-06 | Origin: /r/programming

Blazor is a modern framework for building web applications using C#/.NET, capable of running in various rendering modes, including pre-rendered static sites, server-rendered, and client-rendered applications. .NET 8 allows mixing these modes on a component level. This post specifically discusses using Blazor Server, which processes changes on the server and streams updates to the client via a SignalR connection. The article contrasts Blazor Server with ASP.NET Web API, a more established framework for creating Web

Published: 2024-11-06 | Origin: Hacker News

The content describes a feature that allows users to personalize their Hacker News frontpage by liking or disliking stories. Users can then click "Update" to receive recommended stories based on their preferences. It also clarifies that this service is not affiliated with Y Combinator or Hacker News.

Published: 2024-11-06 | Origin: Hacker News

In 2022, cfreal presented at BlackAlps 2022 about vulnerabilities in PHP's heap, and I expressed my intention to address this issue. Two years later, I created a meta-issue on PHP's bug tracker and began working on it, receiving significant contributions from Arnaud Le Blanc, who handled most of the development and reviews. We also explored some non-heap-related exploitation techniques. Many improvements have either been implemented or are forthcoming, and it's advised to keep PHP updated.

Published: 2024-11-06 | Origin: Hacker News

The content requests users to enable JavaScript in their web browsers and then refresh the page in order to access and view the site's content.

Published: 2024-11-06 | Origin: /r/programming

The diameter of a binary tree is defined as the longest path between any two nodes, measured in edges. It can be computed efficiently without needing to pass through the root. The diameter at any node can be determined by considering the longest path that passes through that node, the diameter of the left subtree, and the diameter of the right subtree. The algorithm has a time complexity of O(n), where n is the number of nodes, as each node is visited once, and a space complexity of O(h

Published: 2024-11-06 | Origin: Hacker News

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Published: 2024-11-06 | Origin: /r/programming

The content discusses the challenges of managing multiple SSH keys for the same host, specifically for GitHub accounts. While managing different SSH keys for different hosts is well-understood, the complexity arises when multiple accounts (like personal and enterprise GitHub accounts) share the same host name (github.com). The author illustrates the issue using an example where one personal account (fry) and one enterprise account (fry_plnx) both use github.com as the host, leading to potential SSH key conflicts. The

Published: 2024-11-06 | Origin: /r/programming

The Unicode Standard includes characters that have case distinctions but are not classified as either uppercase or lowercase, highlighting the existence of a "title case." Some Unicode characters represent diagraphs, which are combinations of two letters treated as a single letter in certain languages, such as Hungarian. For example, the character dz (U+01F1 LATIN SMALL LETTER DZ) represents the "dz" digraph, which is considered a separate letter in Hungarian. However, there are four diagraphs

Published: 2024-11-06 | Origin: /r/ruby

The author is a full-stack Software Engineer specializing in React, JavaScript, and Rails, with two years of remote work experience. Previously, they founded kwiq, a startup focused on hyperlocal delivery in remote villages. The content discusses Rails' ActionController::Parameters, a feature that enables secure handling of request data in controller actions by allowing only permitted attributes for mass updates. It introduces two new methods introduced in Rails 7.1: the `exclude?` method, which checks if a

Published: 2024-11-06 | Origin: /r/ruby

In a post by Daniel Lempesis dated October 30, 2024, he discusses the challenges of optimizing SQL database performance in Rails applications. Unlike NoSQL databases, which scale horizontally easily, SQL databases like PostgreSQL and MySQL tend to become bottlenecks as a business expands. While SQL databases are efficient, increased loads from a growing customer base necessitate careful optimization strategies. The article outlines basic optimization techniques including eager loading, addressing the N+1 query problem, database indexing, and

Published: 2024-11-06 | Origin: /r/programming

The content discusses methods for error handling in Bash scripts, highlighting that while Bash lacks built-in try-catch blocks, it provides several effective alternatives. Key methods include: 1. Checking command success with exit codes (zero for success, non-zero for failure). 2. Using conditional statements for specific error conditions. 3. Employing the `set -e` command to exit scripts on errors. 4. Utilizing the `trap` command to handle signals and execute specific code when errors occur. 5. Capt

Published: 2024-11-06 | Origin: Hacker News

The author has developed several unofficial applications for Brown University and previously for Macalester College, including an all-encompassing app called 75grand, a university shuttle tracker, and course catalogs. These projects utilized undocumented APIs, which the author enjoys discovering through various methods, notably using regex patterns in GitHub's code search to find potential API endpoints under Brown's domain. The author found that Brown's researcher database is open source and adheres to a predictable pattern for accessing JSON data, which could be

Published: 2024-11-06 | Origin: /r/ruby

Ruby 3.3 introduces significant enhancements to concurrency, essential for efficiently managing multiple simultaneous tasks, especially in fields like AI and machine learning. The article reviews Ruby's evolved concurrency ecosystem, highlighting various tools and abstractions available for developers: - **Thread API:** For traditional multi-threading. - **Fiber API:** For lightweight concurrency. - **Ractor System:** Enabling parallel execution. - **AsyncIO Libraries:** Such as async and async-io. - **Concurrent Ruby Gem:** Offering