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Author SHA1 Message Date
Eric Eastwood
e525e52a7a
Merge fa6680ff76 into e6cb104294 2024-11-11 13:59:09 -06:00
2 changed files with 4 additions and 6 deletions

View file

@ -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 = &[

View file

@ -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.