按建议键对Swift数组进行排序

var numbers = [5, 2, 8, 1, 9]
numbers.sort() // 默认按照升序排序
print(numbers) // 输出：[1, 2, 5, 8, 9]

var numbers = [5, 2, 8, 1, 9]
let sortedNumbers = numbers.sorted() // 返回排序后的新数组
print(sortedNumbers) // 输出：[1, 2, 5, 8, 9]
print(numbers) // 输出：[5, 2, 8, 1, 9]，原始数组顺序未改变

var names = ["Alice", "Bob", "Charlie", "David"]
names.sort(by: { $0.count < $1.count }) // 按照字符串长度进行排序
print(names) // 输出：["Bob", "Alice", "David", "Charlie"]

struct Person {
    let name: String
    let age: Int
}

let people = [
    Person(name: "Alice", age: 25),
    Person(name: "Bob", age: 30),
    Person(name: "Charlie", age: 20)
]

let sortedPeople = people.sorted(by: \.age) // 按照年龄进行排序
print(sortedPeople) // 输出：[Person(name: "Charlie", age: 20), Person(name: "Alice", age: 25), Person(name: "Bob", age: 30)]