jarjar/rustlings
1
0
Fork 0
mirror of https://github.com/rust-lang/rustlings.git synced 2026-01-10 12:49:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

clippy

Browse Source
This commit is contained in:
palutz 2023-09-27 21:43:17 +01:00
parent 0c8944006f
commit 0c72fc9936
3 changed files with 15 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
exercises/clippy/clippy1.rs
View File

@ -9,12 +9,10 @@
// Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a // Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE use std::f32::{self, consts::PI};
use std::f32;
fn main() { fn main() {
let pi = 3.14f32; let pi = PI; // changed to the consts value
let radius = 5.00f32; let radius = 5.00f32;
let area = pi * f32::powi(radius, 2); let area = pi * f32::powi(radius, 2);

7
exercises/clippy/clippy2.rs
View File

@ -3,13 +3,12 @@
// Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a // Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let mut res = 42; let mut res = 42;
let option = Some(12); let option = Some(12);
for x in option { // switching to if let ...
res += x; if let Some(n) = option {
res += n;
} }
println!("{}", res); println!("{}", res);
} }

20
exercises/clippy/clippy3.rs
View File

@ -4,28 +4,28 @@
// //
// Execute `rustlings hint clippy3` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint clippy3` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
#[allow(unused_variables, unused_assignments)] #[allow(unused_variables, unused_assignments)]
fn main() { fn main() {
let my_option: Option<()> = None; let my_option: Option<()> = None;
if my_option.is_none() { // if my_option.is_none() {
my_option.unwrap(); // my_option.unwrap();
} // }
let my_arr = &[ let my_arr = &[
-1, -2, -3 -1, -2, -3,
-4, -5, -6 -4, -5, -6,
]; ];
println!("My array! Here it is: {:?}", my_arr); println!("My array! Here it is: {:?}", my_arr);
let my_empty_vec = vec![1, 2, 3, 4, 5].resize(0, 5); let mut my_empty_vec = vec![1, 2, 3, 4, 5];
my_empty_vec.clear();
println!("This Vec is empty, see? {:?}", my_empty_vec); println!("This Vec is empty, see? {:?}", my_empty_vec);
let mut value_a = 45; let mut value_a = 45;
let mut value_b = 66; let mut value_b = 66;
// Let's swap these two! // Let's swap these two!
value_a = value_b; // value_a = value_b;
value_b = value_a; // value_b = value_a;
value_a = std::mem::replace(&mut value_b, value_a);
println!("value a: {}; value b: {}", value_a, value_b); println!("value a: {}; value b: {}", value_a, value_b);
} }