Simplify solution to 06_ticket_management/01_arrays

[iurii-kyrylenko]

100-exercises-to-learn-rust/exercises/06_ticket_management/01_arrays/src/lib.rs

Lines 7 to 15 in d347d1f

	pub enum Weekday {
	Monday,
	Tuesday,
	Wednesday,
	Thursday,
	Friday,
	Saturday,
	Sunday,
	}

All variants in the enum are unit-only. According to enum casting, its discriminant can be directly accessed with a numeric cast.

So, instead of

100-exercises-to-learn-rust/exercises/06_ticket_management/01_arrays/src/lib.rs

Lines 24 to 33 in d347d1f

	pub fn get_temperature(&self, day: Weekday) -> Option<i32> {
	let index = weekday2index(&day);
	self.temperatures[index]
	}
	pub fn set_temperature(&mut self, day: Weekday, temperature: i32) {
	let index = weekday2index(&day);
	self.temperatures[index] = Some(temperature);
	}
	}

a simplified version can be used:

pub fn get_temperature(&self, day: Weekday) -> Option<i32> {
    self.temperatures[day as usize]
}

pub fn set_temperature(&mut self, day: Weekday, temperature: i32) {
    self.temperatures[day as usize] = Some(temperature);
}