Questions tagged [rust-rustlings]
8 questions
2
votes
1 answer
Rustlings slice primitives
One of the rustlings exercises on primitive is about slices.
When I tried to solve this exercise I started by using the [start...end] syntax to take a slice into the given array as such
fn slice_out_of_array() {
let a: [u8; 5] = [1, 2, 3, 4,…
Nicola Pedretti
- 4,831
- 3
- 36
- 42
1
vote
1 answer
Rustlig if2 trying to convert 1 to "1" inside the function foo_if_fizz
I'm new to rust and I'm looking for a way to convert 1 to "1" at compile time;
pub fn foo_if_fizz(fizzish: &str) -> &str {
if fizzish == "fizz" {
"foo"
} else {
&(1.to_string()). <-- returns a reference to data owned by the…
Jean-Paul Abi-Ghosn
- 179
- 1
- 8
1
vote
1 answer
rustlings: hashmap3.rs expected `()`, found struct `Team`
I'm learning rust using rustlings. I was trying to implement a solution in a functional way (rustlings only asked for the imperative way). I'm running into the following compiler error and haven't been able to figure this out since 2 hours. Please…
Dheeraj Bhaskar
- 18,633
- 9
- 63
- 66
0
votes
1 answer
Rust visibility from child module to outside
I'm learning about Rust, and trying to figure out the visibility rules for modules.
I have the following code:
fn x() -> u8 {
5
}
struct Person {
name: String,
}
mod example {
use super::{x, Person};
pub fn foo(person: &Person) {
…
DACUS
- 33
- 1
- 5
0
votes
1 answer
Rustlings Quiz2: Why is i of type &usize instead of usize
I am new to Rust and I am attempting the Rustlings quiz2 problem.
Below is the whole code for reference.
// quiz2.rs
// This is a quiz for the following sections:
// - Strings
// - Vecs
// - Move semantics
// - Modules
// - Enums
// Let's build a…
jcleow
- 57
- 1
- 5
0
votes
0 answers
Rust pattern match for "not equal" to a literal
I'm a rust newbie. This is not a homework question.
I know I can match on literals like the first match below. I've indicated where I need help below with vvvv. I'm checking if a divides b completely (if it does return a/b, else return err…
Dheeraj Bhaskar
- 18,633
- 9
- 63
- 66
0
votes
0 answers
rust: integer multiplication in match
Hi I am learnig rust and doing the excercise rustlings/itertors3.rs
My first implementation of fn divide not behaves as I expected. Could Someone explain me why?
My first attempt was:
// Calculate `a` divided by `b` if `a` is evenly divisible by…
murku
- 1
- 2
0
votes
1 answer
Method `push_str` returns () instead of String
I'm trying to learn rust via rustlings and I'm encountering this weird error. I understand that it modifies self in place but why does it return a unit () instead of the modified String
impl AppendBar for String {
// TODO: Implement `AppendBar`…
Starfish
- 31
- 3