package main

import (
	"fmt"
	"runtime"
	"sort"
)

func main() {
        fmt.Println("確認環境: ", runtime.Version())
	people := []struct {
		Name string
		Age  int
	}{
		{"Gopher", 7},
		{"Alice", 55},
		{"Vera", 24},
		{"Bob", 75},
	}

	sort.Slice(people, func(i, j int) bool { return people[i].Age < people[j].Age })
	fmt.Println("By age 昇順:", people)

	sort.Slice(people, func(i, j int) bool { return people[i].Age > people[j].Age })
	fmt.Println("By age 降順:", people)

	p := []int {7, 55, 24, 75}
	sort.Slice(p, func(i, j int) bool { return p[i] < p[j] })
	fmt.Println(p)

}

確認環境:  go1.15.6
By age 昇順: [{Gopher 7} {Vera 24} {Alice 55} {Bob 75}]
By age 降順: [{Bob 75} {Alice 55} {Vera 24} {Gopher 7}]
[7 24 55 75]