Mutating and borrowing, (owning) | Rust Programming Language Community | Page 1

zealous temple Jun 1, 2022, 10:53 AM

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Have you read the rust book?

ancient walrus Jun 1, 2022, 10:54 AM

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well mutability and ownership are two separate parts in the language

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to be mutable means you can change something

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so you can do this:

let mut x = 0;
x += 1;

but not this:

let x = 0;
x += 1;

ornate mulch Jun 1, 2022, 10:55 AM

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Yes

ancient walrus Jun 1, 2022, 10:55 AM

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yes

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oh hi alpha

ornate mulch Jun 1, 2022, 10:55 AM

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Hi sensei

ancient walrus Jun 1, 2022, 10:55 AM

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corroBut

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you might see code that "change" an immutable variable, like this:

let x = 0;
let x = x + 30;

and this is entirely okay in Rust, unlike some other languages

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so?

olive shellBOT Jun 1, 2022, 10:59 AM

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30()

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10()

ancient walrus Jun 1, 2022, 10:59 AM

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nope

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the big difference is, the first one is creating another variable entirely with the same name

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which means you can change its type

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let x = 0; // this is an i32
let x = x.to_string(); // this is a String

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you can't do this with mutable variables

let mut x = 0;
x = x.to_string(); // nope

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i'm not sure i get what you mean?

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ah. you're asking to do something like this?'

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yeah

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so that's actually a discouraged pattern in Rust

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Rust really, really doesn't like global state

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you can do it, but you're not really supposed to do it

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what's the error message?

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well, what's the error message 😛

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i can't help you if i don't even have an idea what's wrong

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most likely rust-analyzer is still indexing

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and that blocks the build directory and file caches

hallow merlin Jun 1, 2022, 11:08 AM

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could also be VS Code integrated terminal not updating because it's not selected (it does that sometimes for me)

ancient walrus Jun 1, 2022, 11:11 AM

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hmmmmmmmmmmmmmm

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could be a wayland issue, not really sure

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looks like SDL2 is looking for the wayland API and it can't find it

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yeah the tutorial wasn't really updated after august 2021

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https://github.com/rust-tutorials/learn-opengl

GitHub

GitHub - rust-tutorials/learn-opengl: Learn OpenGL lessons in Rust

Learn OpenGL lessons in Rust. Contribute to rust-tutorials/learn-opengl development by creating an account on GitHub.

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yeah again, bit outdated

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the primary contributor, @Lokathor#2627 is in this server so perhaps you can ask them

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well i don't think people will just tell you to do raw OGL for guis haha

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you can ask in #gui-and-ui for recommendations, but i personally like druid the best

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other options include egui and iced

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yeah swing right?

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well druid is a bit like it since it's widget based, but eh

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you'll see the differences

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mhm

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you ended up with Rusty C

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ferrisBut

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you mean to improve the code or like, work on something else?

#Mutating and borrowing, (owning)