按数组中属性值的和进行kotlin分组

data class Person(val name: String, val age: Int)

fun main() {
    val people = listOf(
        Person("Alice", 25),
        Person("Bob", 30),
        Person("Charlie", 25),
        Person("Dave", 35),
        Person("Eve", 30)
    )

    val groupedPeople = people.groupBy { it.age }

    for ((age, group) in groupedPeople) {
        println("People with age $age:")
        for (person in group) {
            println("- ${person.name}")
        }
        println()
    }
}

People with age 25:
- Alice
- Charlie

People with age 30:
- Bob
- Eve

People with age 35:
- Dave