DDraceNetwork - general

DDraceNetwork

DDraceNetwork / general

This channel is for all Teeworlds/DDNet and related chat. Gameplay questions can be asked here as well rather than in #questions. Ingame screenshots and any other Teeworlds related media goes to #showroom.

Between 2023-05-22 00:00:00Z and 2023-05-23 00:00:00Z

morning ddnet ddnet

ddnet

PES_Hi

5

Image attachment

Ryozuki

morning ddnet ddnet

ddnet

how's your monday going?

as usual

10:00

went to gym and now work

greenthing

2

@Ryozuki what is the difference between &str and String in rust. just that &str is not mutable, it has 2 fields in stack, pointer to the start of data and length when String can be flexible size and has ptr, length and capacity fields?

a String is owned

11:28

&str is a borrow to string

11:28

a string literal is a &str to

11:29

with 'static lifetime

11:30

and if u want to represent a possibly owned or borrowed string

11:30

cows are ur friend

11:30

Cow< 'static, str> is a nice trick (edited)

11:30

https://doc.rust-lang.org/std/borrow/enum.Cow.html

Cow in std::borrow - Rust

A clone-on-write smart pointer.

what happens if i teoretically do

let mut x = "Deez";
x = "nuts";

u simply change where the &str points to

11:32

both are literals

11:32

also #developer

when #developer

11:32

a gg

my js monke brain cant handle it

11:32

even tho i hate js feelsbadman

feelsbadman

MilkeeyCat

@Ryozuki what is the difference between &str and String in rust. just that &str is not mutable, it has 2 fields in stack, pointer to the start of data and length when String can be flexible size and has ptr, length and capacity fields?

pls don't tell me that you're rewriting the site on rust justatest

justatest

Lumpy ◐ω◑

pls don't tell me that you're rewriting the site on rust justatest

justatest

no, i cant even write a fucntion which works correctly with String and &str

11:47

justatest

11:47

but thats a good idea

11:47

for future

dat site is doomed

feelsbadman

MilkeeyCat

@Ryozuki what is the difference between &str and String in rust. just that &str is not mutable, it has 2 fields in stack, pointer to the start of data and length when String can be flexible size and has ptr, length and capacity fields?

&str is just a view, String is like a buffer that you can write to

12:05

you can get a &str view of String

Pointer with extra steps smh

Learath2

Pointer with extra steps smh

safe pointer*

Learath2

Pointer with extra steps smh

the problem is that pointers can be owned in C/C++, too

with lot of ergonomics due to not needing a stupid \0 char for valid strs

std::unique_ptr with extra steps

u cannot slice like rust does

12:09

u would need to make ur custom str

what the hell is &mut str

a mutable view of the string slice

12:09

u can only replace its contents

12:09

not add

ok

thonk

Ryozuki

not add

also it's rarely used, if at all

ye never seen

but does it work in theory?

yes, works in theory

would be useful if u have a inplace algorithm

12:12

maybe some sort

Ryozuki

u would need to make ur custom str

Did somebody say std::string_view? coolcry

coolcry

in fact

12:13

u can .sort() a mut str

12:13

it works on any slice

Learath2

Did somebody say std::string_view? coolcry

coolcry

justatest

Ryozuki

u can .sort() a mut str

I don't think so

The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.

>

Also, it allocates temporary storage half the size of self, but for short slices a non-allocating insertion sort is used instead.

Ryozuki

it works on any slice

but &mut str isn't a slice as far as the language is concerned

https://doc.rust-lang.org/std/primitive.slice.html#method.sort

A dynamically-sized view into a contiguous sequence, [T]. Contiguous here means that elements are laid out so that every element is the same distance from its neighbors.

12:14

hmm

12:14

is a sort on a str different than sorting its bytes view?

yes

12:14

due to utf-8

i see then yeah

going from &mut str to &mut [u8] would be unsound btw

12:14

which is why that method doesn't exist

i think u gotta put the chars in a vec<char>

12:15

or idk

yea, that'd work

let s = wordy.chars().sorted().rev().collect::<String>();

12:15

itertools sorted tho

12:15

or is it std

12:15

itertools is essential anyway

12:16

i love it

why do you reverse the sorting?

idk i copied it from so

12:23

but maybe the sort is not in the order they like

How does this even work btw? Don’t you need to consume the entire iterator to make a sorted version and thus kinda lose all the benefits of using an iterator?

Sort all iterator elements into a new iterator in ascending order.

>

Note: This consumes the entire iterator, uses the slice::sort method and returns the result as a new iterator that owns its elements.

>

The sorted iterator, if directly collected to a Vec, is converted without any extra copying or allocation cost.

sorted is just like in python

https://docs.rs/itertools/latest/itertools/trait.Itertools.html#method.sorted

Itertools in itertools - Rust

An [Iterator] blanket implementation that provides extra adaptors and methods.

it creates a new vector

12:27

so yes, it loses all the benefits of it being an iterator

Ryozuki

u can only replace its contents

do you know how to do it? 0_o

MilkeeyCat

do you know how to do it? 0_o

there's basically no way to do it with &mut str

12:32

don't get hung up on &mut str, I think

12:32

just ignore it ^^

12:32

it's not a type with a lot of useful methods in rust

12:32

you probably want a &mut String or a String

heinrich5991

don't get hung up on &mut str, I think

i also think so after staring 40 mins on monitor

I don't think I've ever used &mut str in my (checks calendar) ~10 years of rust

yeah

12:34

u probs confusing stuff

12:34

use String

12:34

doesnt matter if u clone a lot either when u learn

12:35

and remember, if u want to modify the String, use let mut

ok ill remember

fn main() {
    let mut hello = String::new();
    hello.push_str("hello");
    println!("{hello}")
}

damn, thanks for the help =]

12:37

i just wanted to know wtf are &str and &mut str and when to use them. it wasnt a problem just to use String

&str is useful, &mut str is not

2 hours of research also says so =]

@keb wanna hop on fng

i dead

MilkeeyCat

2 hours of research also says so =]

thanks for bringing up #developer things in #general troll

troll

Lumpy ◐ω◑

thanks for bringing up #developer things in #general troll

troll

np

15:15

im too dumb for #developer

feel free to post in #developer, everyone is free to do so

you don't want Milkeey in developer, trust me troll

troll

Lumpy ◐ω◑

you don't want Milkeey in developer, trust me troll

troll

ayo, it hurts

15:18

but true :|

yes

1

Image attachment

16:55

blocks so many directions it had to mention directions twice

Hm the word could be replaced with "every" to fix without much code change

cyberFighter

@keb wanna hop on fng

YES

17:28

IN A BIT

cyberFighter

Click to see attachment 🖼️

who do I ask for directions on how to use it?

Btw, many of the sentences in the Entity Descriptions don't have "." kek

kek

17:55

Some of the words which are capitalized, aren't capitalized at all

17:55

whoever made those descriptions, well... how did you guys not notice it?

I think it's in a repo somehwere

17:55

you can fix it

Pog

if you're interested, I can try finding it

found it

17:57

https://github.com/ddnet/ddnet-web/blob/master/explain-layers/tiles.csv

ddnet-web/tiles.csv at master · ddnet/ddnet-web

Static part of DDNet's website: https://ddnet.org/ - ddnet-web/tiles.csv at master · ddnet/ddnet-web

@Cellegen basically, I think you need to undo all the capitalization changes

19:07

I think the capitalization was correct before

If you want to

@heinrich5991 pls dm

@murpi pls dm bro

stop pinging people for no reason

masque

@murpi pls dm bro

did you get banned from a server

Voxel

did you get banned from a server

No

@Ravie @Skeith

Image attachment

23:48

best skin uncontested

Exported 136 message(s)