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rustlings/exercises/option/option2.rs
Sanjay K 86b5c08b9b
feat: Add Option2 exercise (#290)
* added option2

* changed up the exercise, modified the help section

* Update exercises/option/option2.rs

Co-Authored-By: fmoko <mokou@posteo.net>

* Update exercises/option/option2.rs

Co-Authored-By: fmoko <mokou@posteo.net>

* Update exercises/option/option2.rs

Co-Authored-By: fmoko <mokou@posteo.net>

Co-authored-by: fmoko <mokou@posteo.net>
2020-04-07 20:16:10 +02:00

26 lines
800 B
Rust

// option2.rs
// Make me compile! Execute `rustlings hint option2` for hints
// I AM NOT DONE
fn main() {
let optional_value = Some(String::from("rustlings"));
// Make this an if let statement whose value is "Some" type
value = optional_value {
println!("the value of optional value is: {}", value);
} else {
println!("The optional value doesn't contain anything!");
}
let mut optional_values_vec: Vec<Option<i8>> = Vec::new();
for x in 1..10 {
optional_values_vec.push(Some(x));
}
// make this a while let statement - remember that vector.pop also adds another layer of Option<T>
// You can stack `Option<T>`'s into while let and if let
value = optional_values_vec.pop() {
println!("current value: {}", value);
}
}