sample.rs

   let mut guard_stats: HashMap<u16, (u16, [u16; 60])> = HashMap::new();
    let mut current_guard_id: u16 = 0;
    let mut current_sleep_start_time: NaiveDateTime = NaiveDateTime::from_timestamp(0, 0);
    for entry in log_entries {
        match entry.entry_type {
            EntryType::StartedShift(guard_id) => current_guard_id = guard_id,
            EntryType::StartedSleeping => current_sleep_start_time = entry.date_time,
            EntryType::WokeUp => {
                let _entry = guard_stats.entry(current_guard_id);
                let mut _temp0 = 0;
                let mut _temp1 = [0u16; 60];
                let stats = _entry.or_insert((_temp0, _temp1));
                let sleep_start_min = current_sleep_start_time.minute() as u8;
                let sleep_end_min = entry.date_time.minute() as u8;
                for i in sleep_start_min..=sleep_end_min {
                    stats.1[i as usize] += 1;
                }
            }
        }
    }