feat(options1): rewrite to remove array stuff

This commit is contained in:
mokou 2022-07-14 17:53:27 +02:00
parent b644558c19
commit 06e4fd3765
1 changed files with 23 additions and 9 deletions

View File

@ -8,16 +8,30 @@ fn print_number(maybe_number: Option<u16>) {
println!("printing: {}", maybe_number.unwrap());
}
fn main() {
print_number(13);
print_number(99);
// This function returns how much icecream there is left in the fridge.
// If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
// all, so there'll be no more left :(
// TODO: Return an Option!
fn maybe_icecream(time_of_day: u16) -> Option<u16> {
// We use the 24-hour system here, so 10PM is a value of 22
???
}
let mut numbers: [Option<u16>; 5];
for iter in 0..5 {
let number_to_add: u16 = {
((iter * 1235) + 2) / (4 * 16)
};
#[cfg(test)]
mod tests {
use super::*;
numbers[iter as usize] = number_to_add;
#[test]
fn check_icecream() {
assert_eq!(maybe_icecream(10), Some(5));
assert_eq!(maybe_icecream(23), None);
assert_eq!(maybe_icecream(22), None);
}
#[test]
fn raw_value() {
// TODO: Fix this test. How do you get at the value contained in the Option?
let icecreams = maybe_icecream(12);
assert_eq!(icecreams, 5);
}
}