mirror of
https://github.com/rust-lang/rustlings.git
synced 2024-12-26 15:26:29 +00:00
Compare commits
1 commit
1e335d4910
...
e525e52a7a
Author | SHA1 | Date | |
---|---|---|---|
|
e525e52a7a |
2 changed files with 4 additions and 6 deletions
|
@ -4,11 +4,9 @@
|
||||||
#[rustfmt::skip]
|
#[rustfmt::skip]
|
||||||
#[allow(unused_variables, unused_assignments)]
|
#[allow(unused_variables, unused_assignments)]
|
||||||
fn main() {
|
fn main() {
|
||||||
let my_option: Option<&str> = None;
|
let my_option: Option<()> = None;
|
||||||
// Assume that you don't know the value of `my_option`.
|
|
||||||
// In the case of `Some`, we want to print its value.
|
|
||||||
if my_option.is_none() {
|
if my_option.is_none() {
|
||||||
println!("{}", my_option.unwrap());
|
println!("{:?}", my_option.unwrap());
|
||||||
}
|
}
|
||||||
|
|
||||||
let my_arr = &[
|
let my_arr = &[
|
||||||
|
|
|
@ -3,11 +3,11 @@ use std::mem;
|
||||||
#[rustfmt::skip]
|
#[rustfmt::skip]
|
||||||
#[allow(unused_variables, unused_assignments)]
|
#[allow(unused_variables, unused_assignments)]
|
||||||
fn main() {
|
fn main() {
|
||||||
let my_option: Option<&str> = None;
|
let my_option: Option<()> = None;
|
||||||
// `unwrap` of an `Option` after checking if it is `None` will panic.
|
// `unwrap` of an `Option` after checking if it is `None` will panic.
|
||||||
// Use `if-let` instead.
|
// Use `if-let` instead.
|
||||||
if let Some(value) = my_option {
|
if let Some(value) = my_option {
|
||||||
println!("{value}");
|
println!("{value:?}");
|
||||||
}
|
}
|
||||||
|
|
||||||
// A comma was missing.
|
// A comma was missing.
|
||||||
|
|
Loading…
Reference in a new issue