StackOverflow.com

VN:F [1.9.22_1171]
Rating: 8.5/10 (13 votes cast)

Random snippets of all sorts of code, mixed with a selection of help and advice.

How to get a Scala singleton object from its fully qualified name using Scala reflection

15 May 2026 @ 9:34 pm

I have a singleton object implementing a trait in Scala 2.13: package invalid.so trait MyTrait { def myValue: String } object MyObject extends MyTrait { override final val myValue = "my-value" } I want to use runtime reflection to get the instance of MyObject as an instance of MyTrait, based on the fully qualified name "invalid.so.MyObject". I know how to do this using Java reflection: val clazz = Class.forName("invalid.so.MyObject$") val instance: MyTrait = clazz.getField("MODULE$").get(null).asInstanceOf[MyTrait] However, this is somewhat arcane and requires specific knowledge of the generated JVM values used. In particular, the fact that the class name is "invalid.so.MyObject$" (with a trailing dollar sign) and that the inst

Cpp templates vs function pointers for AVX - agnostic system

15 May 2026 @ 9:27 pm

I want to create a computational block which should be able to use AVX if it is available. For that I want to use a template depending on the concrete AVX, compile all versions and in runtime use the one supported by the local CPU. I plan it to look something like this [note that for simplicity, we consider that at least one AVX is available]: enum AvxT : int { AVX_512, AVX_256, AVX_128 }; template<AvxT E> class AvxCalc { public: using Cell = std::conditional_t<E == AvxT::AVX_128, __m128i, std::conditional_t<E == AvxT::AVX_256, __m256i, __m512i> >; template<AvxT T = E> std::enable_if_t<T == AvxT::AVX_128, AvxCalc<E>> operator + (const AvxCalc<E> & other) const; // ... [the other AvxT declarations] private: Cell data; }; template<AvxT E> template<AvxT T> std::enable_if_t<T == AvxT::AVX_128, AvxCalc<E>>

Stuck in tutorial hell after 4 years: How do I build websites and think independently?

15 May 2026 @ 9:23 pm

I have been coding for about 4 years now. I have watched numerous courses and followed many tutorials, but I am facing a major roadblock: I still can't build beneficial websites or figure out how to think like a developer on my own. Whenever I start a project from scratch without a tutorial guiding me, I completely freeze and don't know how to write the code or structure the logic. I feel stuck in "Tutorial Hell" and don't know how to bridge the gap between watching someone else code and building something functional by myself. For those who have been in my shoes, what practical steps should I take to break this cycle? How can I train my brain to think programmatically and start building real-world projects independently? Thank you in advance for your advice!

Programming a arduino chip

15 May 2026 @ 9:23 pm

I am having trouble programming my Arduino chip for my robot. My laptop is school-owned, so I cannot utilize the free software. Please inform me of any non-downloadable websites that I can use to program my chip. Thank you!

How to set of data transfer between android and window apps (maui)?

15 May 2026 @ 9:19 pm

Need to transfer data from tablet to windows Hi I am quite new to maui. I have build an android app which is registering scores from a ball game played by at least four people. These scores should be transferred to a windows application and I have a hard time figuring out how to set up communication for this. I have two restrictions: there is no internet where the game is played and the windows machine don't have bluetooth :-( I have thought of Create a local web using the laptop and let the tablet use this connection to transfer data Raw data transfer (There may be issues with access rights) Buy a bluetooth dongle and use this as the communication channel. As I am new to this I look forward to your suggestions on the easiest way to do this in your opinion.

dbms minimal cover gate cs

15 May 2026 @ 9:09 pm

enter image description here Consider the following FD set : { P -> QR, Q -> PR, R -> PQ} Which of the following is/are the minimal cover for the above FD set? A) P -> Q, Q -> R, R -> P B) P -> R, Q -> R, R -> PQ C) Q -> P, P -> R, R -> Q D) P -> QR, Q -> P, R -> P how is the Answer coming as a,b,c,d and what is the logic behind this?

How are reconstructions of development releases of AOSP/Android versions made?

15 May 2026 @ 9:07 pm

This may be offtopic here, but I was looking on betawiki.net and found 'reconstructions' of Android development versions that weren't publicly released, up to Lollipop 5.0. I suspect that they were created by reverting several commits (that were made public after the release of a specific Android version to AOSP) and other minor changes. Is this correct?

JHipster Online Opeartor v2.41.1 — Worker CRDs, MCP Server Generator, Backend Statistics, Dark Mode

15 May 2026 @ 9:07 pm

Happy Friday, JHipster community 👋 v2.41.1 of the JHipster Online Operator is now available on [OperatorHub](https://operatorhub.io/operator/jhipster-online-operator). This operator builds on the upstream JHipster Online project and extends it with additional generators, AI capabilities, and Kubernetes-native tooling. --- **What the operator includes** - **Multi-framework generation** — Spring Boot, Quarkus, Micronaut, .NET, Node/NestJS, Python, Rust, and MCP server projects - **JDL Studio** — built-in visual editor for JHipster Domain Language models, served via nginx sidecar (port 8081) - **JDL AI Assistant** — AI-assisted JDL drafting with lexical + semantic RAG, running against in-cluster vLLM models. Tested with Granite, Nemotron, and Qwen; any OpenAI-compatible endpoint should work. No external API calls — runs fully on-cluster.

How do I make a scrollable tray with fixed-position custom scroll buttons?

15 May 2026 @ 9:00 pm

I'm trying to create a scrollable horizontal tray of thumbnails with custom scroll buttons and no scroll bar. The tray will be wider than its parent div, and I want to have button-divs fixed/stickied to the parent div so they stay in the same position when the tray gets scrolled. I've tried setting the button divs to position: absolute, but even though they're anchored to the parent div, they still scroll left and right with the tray div. Here's a minimal working reproduction: <html> <head> </head> <body> <style> .folio_ss_cont { position: relative; width: 50%; overflow: hidden; overflow-x: auto; background: #faa; color: #fff; } .folio_ss_slider { width: fit-content; min-width: 100%; display: flex; flex-flow: row nowrap; background:

Exiting if/elif Statements in Python [closed]

15 May 2026 @ 8:16 pm

I'm currently writing a text-based game to practice if/elif statements a bit and I'm running into an issue with exiting if/elif statements. I want to make it continue on from the initial if/elif statement, picking up from where the initial elif statement is (the last 2 lines of code). Is that possible? Here's what I have so far: cave_or_jungle = input("Do you go into the JUNGLE or the CAVE?").lower() if cave_or_jungle == "cave": print("You go into the cave! The cave is cold and dark. You find a rusty lantern and hear strange growling deeper inside.") deeper_or_leave = input("Do you go DEEPER or LEAVE?").lower() if deeper_or_leave == "deeper": print("Deep in the cave, a giant beast jumps out of the darkness.") fight_or_run = input("Do you FIGHT or RUN?").lower() if fight_or_run == "fight": print("The beast is too powerful. You are defe