如何使用golang中的sort.Slice函数对切片进行排序

func Slice(slice interface{}, less func(i, j int) bool)

package main

import (
    "fmt"
    "sort"
)

type Person struct {
    Name string
    Age  int
}

type Persons []Person

func (p Persons) Len() int {
    return len(p)
}

func (p Persons) Less(i, j int) bool {
    return p[i].Age < p[j].Age
}

func (p Persons) Swap(i, j int) {
    p[i], p[j] = p[j], p[i]
}

func main() {
    persons := Persons{
        {"Alice", 25},
        {"Bob", 30},
        {"Charlie", 20},
        {"David", 35},
    }

    fmt.Println("Before sort:", persons)

    sort.Slice(persons, func(i, j int) bool {
        return persons[i].Age < persons[j].Age
    })

    fmt.Println("After sort:", persons)
}