The dotnet run command now supports directly executing single C# files, simplifying the process of running small programs or scripts. Previously, creating a project file was necessary, adding overhead for simple tasks. This streamlined approach allows developers to run dotnet run myapp.cs directly, handling compilation and execution in one step. The feature supports top-level statements, NuGet package dependencies declared within the file using #nullable directives, preprocessor directives, and more, providing a convenient and powerful way to execute C# code without project file management. This enhances the scripting capabilities of C# and makes it easier for quick prototyping and experimentation.
Linux in Excel demonstrates running a basic Linux system within a Microsoft Excel spreadsheet. Leveraging VBA scripting and x86 emulation, the project allows users to interact with a simplified Linux environment, complete with a command line interface, directly within Excel. It emulates a small subset of Linux system calls, enabling basic commands like ls, cat, and file manipulation within the spreadsheet's cells. While highly constrained and not a practical Linux replacement, it serves as a fascinating proof-of-concept, showcasing the flexibility of both VBA and the underlying architecture of Excel.
Hacker News users expressed both amusement and skepticism towards running Linux in Excel. Several commenters questioned the practicality and performance of such a setup, with some suggesting it's more of a novelty than a useful tool. Others were impressed by the technical feat, appreciating the ingenuity and creativity involved. Some discussed the potential for misuse, particularly in bypassing corporate security measures. There was also debate on whether this qualified as truly "running Linux," with some arguing it was merely simulating a limited environment. A few pointed out the historical precedent of running Doom in unexpected places, placing this project in a similar category of playful hacking.
This blog post demonstrates how to efficiently integrate Large Language Models (LLMs) into bash scripts for automating text-based tasks. It leverages the curl command to send prompts to LLMs via API, specifically using OpenAI's API as an example. The author provides practical examples of formatting prompts with variables and processing the JSON responses to extract desired text output. This allows for dynamic prompt generation and seamless integration of LLM-generated content into existing shell workflows, opening possibilities for tasks like code generation, text summarization, and automated report creation directly within a familiar scripting environment.
Hacker News users generally found the concept of using LLMs in bash scripts intriguing but impractical. Several commenters highlighted potential issues like rate limiting, cost, and the inherent unreliability of LLMs for tasks that demand precision. One compelling argument was that relying on an LLM for simple string manipulation or data extraction in bash is overkill when more robust and predictable tools like sed, awk, or jq already exist. The discussion also touched upon the security implications of sending potentially sensitive data to an external LLM API and the lack of reproducibility in scripts relying on probabilistic outputs. Some suggested alternative uses for LLMs within scripting, such as generating boilerplate code or documentation.
This 2015 blog post demonstrates how to leverage Lua's flexible syntax and metamechanisms to create a Domain Specific Language (DSL) for generating HTML. The author uses Lua's tables and functions to create a clean, readable syntax that abstracts away the verbosity of raw HTML. By overloading the concatenation operator and utilizing metatables, the DSL allows users to build HTML elements and structures in a declarative way, mirroring the structure of the output. This approach simplifies HTML generation within Lua, making the code cleaner and more maintainable. The post provides concrete examples showing how to define tags, attributes, and nested elements, offering a practical guide to building similar DSLs for other output formats.
Hacker News users generally praised the article for its clear explanation of building a DSL in Lua, particularly appreciating the focus on leveraging Lua's existing features and metamechanisms. Several commenters shared their own experiences and preferences for using Lua for DSLs, including its use in game development and configuration management. One commenter pointed out potential performance considerations when using this approach, suggesting that precompilation could mitigate some overhead. Others discussed alternative methods for building DSLs, such as using parser generators. The use of Lua's setfenv was highlighted, with some acknowledging its power while others expressing caution due to potential debugging difficulties. A few users also mentioned other languages like Fennel and Janet as interesting alternatives to Lua for similar purposes.
Scripton is a Python IDE designed for data science and visualization, emphasizing real-time, interactive feedback. It features a dual-pane interface where code edits instantly update accompanying visualizations, streamlining the exploratory coding process. The tool aims to simplify data exploration and model building by eliminating the need for repetitive execution and print statements, allowing users to quickly iterate and visualize their data transformations. Scripton is available as a web-based application accessible through modern browsers.
Hacker News users discussed Scripton's niche and potential use cases. Some saw value in its real-time visualization capabilities for tasks like data exploration and algorithm visualization, particularly for beginners or those preferring a visual approach. Others questioned its broader appeal, comparing it to existing tools like Jupyter Notebooks and VS Code with extensions. Concerns were raised about performance with larger datasets and the potential limitations of a Python-only focus. Several commenters suggested potential improvements, such as adding support for other languages, improving the UI/UX, and providing more advanced visualization features. The closed-source nature also drew some criticism, with some preferring open-source alternatives.
This blog post details the author's highly automated Vim setup, emphasizing speed and efficiency. Leveraging plugins like vim-plug for plugin management and a variety of others for features like fuzzy finding, Git integration, and syntax highlighting, the author creates a streamlined coding environment. The post focuses on specific configurations and keybindings for tasks such as file navigation, code completion, compiling, and debugging, showcasing a personalized workflow built around minimizing friction and maximizing productivity within Vim. The ultimate goal is to achieve a near-IDE experience using Vim's powerful extensibility.
Hacker News users generally praised the author's approach to Vim automation, emphasizing the balance between leveraging Vim's powerful features and avoiding over-complication. Several commenters shared their own preferred plugins and workflows, highlighting tools like fzf, vim-projectionist, and CtrlP for file navigation, and luasnip and UltiSnips for snippets. Some appreciated the author's philosophy of learning Vim gradually and organically, rather than attempting to master everything at once. A few commenters discussed the trade-offs between using a highly configured Vim setup versus a more minimalist approach, and the potential drawbacks of relying too heavily on plugins. There was also a brief discussion about the relative merits of using language servers and other external tools within Vim.
"Do-nothing scripting" advocates for a gradual approach to automation. Instead of immediately trying to fully automate a complex task, you start by writing a script that simply performs the steps manually, echoing each command to the screen. This allows you to document the process precisely and identify potential issues without the risk of automated errors. As you gain confidence, you incrementally replace the manual execution of each command within the script with its automated equivalent. This iterative process minimizes disruption, allows for easy rollback, and makes the transition to full automation smoother and more manageable.
Hacker News users generally praised the "do-nothing scripting" approach as a valuable tool for understanding existing processes before automating them. Several commenters highlighted the benefit of using this technique to gain stakeholder buy-in and build trust, particularly when dealing with complex or mission-critical systems. Some shared similar experiences or suggested alternative methods like using strace or dtrace. One commenter suggested incorporating progressive logging to further refine the script's insights over time, while another cautioned against over-reliance on this approach, advocating for a move towards true automation once sufficient understanding is gained. Some skepticism was expressed regarding the practicality for highly interactive processes. Overall, the commentary reflects strong support for the core idea as a practical step toward thoughtful and effective automation.
The blog post details how Perl can be used to enhance the functionality of MIDI devices. The author describes creating a Perl script to act as a bridge between different MIDI devices, specifically a MIDI keyboard and a drum machine. By intercepting and modifying MIDI messages in real-time using Perl's MIDI modules, the author implemented features like transposing notes, remapping drum sounds, and adding swing quantization. This allowed the author to combine and customize the capabilities of their hardware in ways not possible with the devices alone, showcasing the flexibility and power of Perl for manipulating MIDI data.
Hacker News users generally expressed appreciation for the author's ingenuity and the practical application of Perl for a niche purpose. Several commenters shared their own experiences with MIDI tinkering and fondly recalled older, simpler MIDI setups. One commenter highlighted the utility of Perl's flexible text processing capabilities in this context, while another pointed out the enduring relevance of older languages like Perl for hardware interfacing. A few users discussed the potential benefits and drawbacks of using other languages like Python or C for similar projects, with some arguing for the simplicity and speed of Perl for such tasks. The overall sentiment was positive, with a touch of nostalgia for a bygone era of computing.
Bunster is a tool that compiles Bash scripts into standalone, statically-linked executables. This allows for easy distribution and execution of Bash scripts without requiring a separate Bash installation on the target system. It achieves this by embedding a minimal Bash interpreter and necessary dependencies within the generated executable. This makes scripts more portable and user-friendly, especially for scenarios where installing dependencies or ensuring a specific Bash version is impractical.
Hacker News users discussed Bunster's novel approach to compiling Bash scripts, expressing interest in its potential while also raising concerns. Several questioned the practical benefits over existing solutions like shc or containers, particularly regarding dependency management and debugging complexity. Some highlighted the inherent limitations of Bash as a scripting language compared to more robust alternatives for complex applications. Others appreciated the project's ingenuity and suggested potential use cases like simplifying distribution of simple scripts or bypassing system-level restrictions on scripting. The discussion also touched upon the performance implications of this compilation method and the challenges of handling Bash's dynamic nature. A few commenters expressed curiosity about the inner workings of the compilation process and its handling of external commands.
The author recreated the "Bad Apple!!" animation within Vim using an incredibly unconventional method: thousands of regular expressions. Instead of manipulating images directly, they constructed 6,500 unique regex searches, each designed to highlight specific character patterns within a specially prepared text file. When run sequentially, these searches effectively "draw" each frame of the animation by selectively highlighting characters that visually approximate the shapes and shading. This process is exceptionally slow and resource-intensive, pushing Vim to its limits, but results in a surprisingly accurate, albeit flickering, rendition of the iconic video entirely within the text editor.
Hacker News commenters generally expressed amusement and impressed disbelief at the author's feat of rendering Bad Apple!! in Vim using thousands of regex searches. Several pointed out the inefficiency and absurdity of the method, highlighting the vast difference between text manipulation and video rendering. Some questioned the practical applications, while others praised the creativity and dedication involved. A few commenters delved into the technical aspects, discussing Vim's handling of complex regex operations and the potential performance implications. One commenter jokingly suggested using this technique for machine learning, training a model on regexes to generate animations. Another thread discussed the author's choice of lossy compression for the regex data, debating whether a lossless approach would have been more appropriate for such an unusual project.
Summary of Comments ( 202 )
https://news.ycombinator.com/item?id=44122582
HN commenters generally express enthusiasm for
dotnet run app.cs, finding it a welcome simplification for running single-file C# programs. Several compare it favorably to similar functionality in other languages like Python, Ruby, and JavaScript, appreciating the reduced ceremony for quick scripts and experimentation. Some raise questions about how it handles dependencies and more complex projects, while others note potential implications for teaching and onboarding new C# developers. A few point out that this feature isn't entirely new, with similar results achievable through piping to the compiler, but acknowledge the improved developer experience this dedicated command offers. There's also discussion about compilation speed and whether pre-compilation might offer further performance improvements for repeated executions.The Hacker News post "Run a C# file directly using dotnet run app.cs" discussing the Microsoft blog post about the new
dotnet run app.csfeature has generated a fair number of comments, mostly revolving around comparisons to other languages and ecosystems, and reflecting on the convenience and implications of this new functionality.Several commenters draw parallels to similar features in other languages. One commenter points out the resemblance to running Python scripts directly using
python my_script.py, highlighting the streamlined experience this offers. Another commenter mentions similar functionality in PHP, emphasizing the ease of use for quick scripting tasks. The ability to execute single files without explicit compilation or project setup is a recurring theme, with several comments praising the reduced friction for beginners and small projects.A few comments delve into the potential implications for tooling and development workflows. One user speculates about the impact on IDEs and how they might integrate this feature, suggesting a more dynamic development process. Another discusses the possibility of using this feature for scripting within larger .NET projects, foreseeing benefits in automation and build processes.
The discussion also touches on the performance aspects of this feature. A commenter raises the question of whether
dotnet run app.csincurs additional overhead compared to running a pre-compiled executable. This prompts a discussion about the potential for behind-the-scenes caching mechanisms and the trade-offs between ease of use and execution speed.Some commenters express concern about the potential for misuse or confusion, particularly among newcomers to C#. They worry that this simplified approach might encourage bad practices or obscure the underlying compilation process. However, others counter this argument by emphasizing the value of lowering the barrier to entry for beginners and promoting experimentation.
Finally, a few commenters offer suggestions for further improvements and extensions to the feature. One suggests the ability to specify command-line arguments directly to the script. Another proposes integrating this functionality with other .NET tools and frameworks. Overall, the comments reflect a generally positive reception to the
dotnet run app.csfeature, with many acknowledging its potential to simplify C# development and expand its use cases.