If you have even tried to sort objects, you might have noticed it was a pain.
If you have a Date object:
struct Date {
let year: Int
let month: Int
let day: Int
}
Then comparing two dates would be:
static func < (lhs: Date, rhs: Date) -> Bool {
if lhs.year != rhs.year {
return lhs.year < rhs.year
} else if lhs.month != rhs.month {
return lhs.month < rhs.month
} else {
return lhs.day < rhs.day
}
}
Except if you use tuples and then it becomes:
static func < (lhs: Date, rhs: Date) -> Bool {
return (lhs.year, lhs.month, lhs.day)
< (rhs.year, rhs.month, rhs.day)
}
(example is taken from Comparable documentation at Apple)
