options1.rs maybe_icecream undefined for hour_of_day == 23

[supervaka]

https://github.com/rust-lang/rustlings/blob/main/exercises/12_options/options1.rs
options1.rs maybe_icecream undefined for hour_of_day == 23

// This function returns how much icecream there is left in the fridge.
// If it's before 22:00 (24-hour system), then 5 scoops are left. At 22:00,
// someone eats it all, so no icecream is left (value 0). Return `None` if
// `hour_of_day` is higher than 23.
fn maybe_icecream(hour_of_day: u16) -> Option<u16> {
    // TODO: Complete the function body.
    if hour_of_day < 22 { 
        Some(5) // If it's before 22:00 (24-hour system), then 5 scoops are left.
    } else if hour_of_day == 22 {
        Some(0) // At 22:00, someone eats it all, so no icecream is left (value 0)
    } else if hour_of_day > 23 {
        None // Return `None` if `hour_of_day` is higher than 23.
    } else {
        Some(0) // this is only here to satisfy the contradicting test case
                // assert_eq!(maybe_icecream(23), Some(0));
    }
}

[supervaka]

If we should follow the test cases, then I suggest changing the line

// hour_of_day is higher than 23.

to something like

// hour_of_day is 23 or higher

[temanmd]

I think the problem is that you dont include 23 in second condition else if hour_of_day == 22

In exercise comments we see:

At 22:00, someone eats it all, so no icecream is left (value 0)

That means we still have value 0 at 22:15, 22:30 etc including 23:00
But just AFTER 23:00 (>) we need to return None

My solution:

fn maybe_icecream(hour_of_day: u16) -> Option<u16> {
    match hour_of_day {
        0..=21 => Some(5),
        22..=23 => Some(0),
        _ => None,
    }
}