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Q&A

Posts tagged rust

Use this tag for questions about code written in Rust.

This tag doesn't have a detailed wiki yet.

71%
+3 −0
Q&A How to correctly daemonize a Rocket-based app?

Summary I'm refactoring a Rust-based service/daemon to move away from gRPC and use a Rocket-based API instead. I'm also using the daemonize crate to turn the foreground process into a background p...

1 answer  ·  posted 5mo ago by ghost-in-the-zsh‭  ·  last activity 4mo ago by ghost-in-the-zsh‭

Question rust rocket daemon
81%
+7 −0
Q&A What allows a string slice (&str) to outlive its scope?

As a relative newcomer to Rust, I'm trying to understand the behaviour of lifetimes, but I am confused by the following code: let s: &amp;str = "first"; let mut r: &amp;str = s; println!("First ...

2 answers  ·  posted 5mo ago by InfiniteDissent‭  ·  last activity 5mo ago by Moshi‭

80%
+6 −0
Q&A Why is this symlink() call returning successfully while apparently failing to create the sym-link?

Summary I'm building an internal system (hardware simulator, using Rust) to help test some Python-based services that talk to hardware. (The services talk to hardware via TTYs.) To trick the Pytho...

1 answer  ·  posted 2y ago by ghost-in-the-zsh‭  ·  last activity 12mo ago by ghost-in-the-zsh‭

Question rust linux
50%
+1 −1
Q&A Nannou model requires a function pointer: How to return a function pointer

Trying to make a nannou app from the template but with a customizable model() function. The template has this main(): fn main() { nannou::app(model).update(update).run(); } The model t...

0 answers  ·  posted 1y ago by telefza‭  ·  edited 1y ago by Alexei‭

80%
+6 −0
Q&A error[E0507]: cannot move out of X which is behind a shared reference.

Making a Nannou App that draws a line to the screen. My model only contains the window itself and a vector of tuples describing the points and color. Similar to this example(under Drawing Lines) ...

1 answer  ·  posted 1y ago by telefza‭  ·  last activity 1y ago by telefza‭

Question rust nannou
77%
+5 −0
Q&A updating a function within a struct

What I want: An object that contains a function that I can update after creation. I created a struct that contains a parameter b and a function(closure?) named Internal_Fn. struct MyThing { ...

1 answer  ·  posted 1y ago by telefza‭  ·  last activity 1y ago by Derek Elkins‭

Question rust lifetime
80%
+6 −0
Q&A Strange change of object lightness and colour in Nannou application

Building a Nannou App from their template. I want a circle to slowly fade in color and randomly change color when hitting the boundary of the window. But there is something strange going on when ...

1 answer  ·  posted 1y ago by telefza‭  ·  last activity 1y ago by telefza‭

Question rust nannou
77%
+5 −0
Q&A Handling JSON files in Rust without manually creating mapping classes

I have JSON that looks something like this: {"id":"n-fsdf-6b6", "name":"JohnSmith", "revisionDate":1591072274000} The JSON data is named CharacterInfo. It comes from a static external URL. The str...

1 answer  ·  posted 2y ago by dustytrash‭  ·  last activity 2y ago by r~~‭

Question rust json
80%
+6 −0
Q&A Are generic enums completely abstract?

When using Result or Option to get a value, the value is wrapped in a Ok or Some. For example, with pattern matching to get a Result: let var: Json = match serde_json::from_str(&amp;my_string) { ...

1 answer  ·  posted 2y ago by jla‭  ·  last activity 2y ago by Derek Elkins‭

Question rust enum
83%
+8 −0
Q&A How can I define a method on [&mut T] where T: MyTrait?

I'm trying to make a trait method callable on mutable slices of a type implementing that trait (see main). Rust doesn't like me for it. use core::convert::AsMut; trait A { type B; fn f(m: ...

1 answer  ·  posted 2y ago by wizzwizz4‭  ·  last activity 2y ago by r~~‭

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