Sort example in Go

gistfile1.go

package main

import (
        "fmt"
        "sort"
)

type Student struct {
        Name           string
        Height, Weight int
}

type Students []*Student

func (s Students) Len() int      { return len(s) }
func (s Students) Swap(i, j int) { s[i], s[j] = s[j], s[i] }

type ByName struct{ Students }

func (s ByName) Less(i, j int) bool { return s.Students[i].Name < s.Students[j].Name }

type ByHeight struct{ Students }

func (s ByHeight) Less(i, j int) bool { return s.Students[i].Height < s.Students[j].Height }

type ByWeight struct{ Students }

func (s ByWeight) Less(i, j int) bool { return s.Students[i].Weight < s.Students[j].Weight }

func printStudents(s []*Student) {
        for _, o := range s {
                fmt.Printf("%v: %v\t%v\n", o.Name, o.Height, o.Weight)
        }
}

func main() {
        s := []*Student{
                {"홍길동", 180, 77},
                {"김연아", 174, 76},
                {"류현진", 188, 82},
                {"김또깡", 182, 79},
                {"강호동", 188, 90},
                {"박소진", 165, 49},
        }

        sort.Sort(ByName{s})
        fmt.Println("Students by Name:")
        printStudents(s)

        println()

        sort.Sort(ByHeight{s})
        fmt.Println("Students by Height:")
        printStudents(s)

        println()

        sort.Sort(ByWeight{s})
        fmt.Println("Students by Weight:")
        printStudents(s)
}