go排序示例

package main

import(

        "fmt"

        "sort"

        "math/rand"

)

const(

        male   =  iota

        female

        unknown

)

var genderStr []string=[]string{"male","female","unknown",}

type People struct{

        Id int `ID`

        Age int `Age`

        Name string `Name`

        Gender int `Gender`

}

func (p People) String() string{

        return fmt.Sprintf("People %q of age %v with ID %v,Gender %s\n",p.Name,p.Age,p.Id,genderStr[p.Gender])

}

type Classmate []People

func (c Classmate) Len() int { return len(c) }

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

func (c Classmate) Swap(i,j int) { c[i],c[j]=c[j],c[i] }

func main(){

        cs:=make (Classmate,10,20)

        for  i:=0;i<len(cs); i++ {

                cs[i].Id=i

                cs[i].Age=rand.Intn(50)

                cs[i].Name=fmt.Sprintf("cs_%v",i)

                cs[i].Gender=rand.Intn(3)

        }

        fmt.Println(cs)

        sort.Sort(cs)

        fmt.Println(cs)
}

Screen output sample:

[People "cs_0" of age 31 with ID 0,Gender male

 People "cs_1" of age 47 with ID 1,Gender unknown

 People "cs_2" of age 31 with ID 2,Gender male

 People "cs_3" of age 25 with ID 3,Gender unknown

 People "cs_4" of age 6 with ID 4,Gender male

 People "cs_5" of age 44 with ID 5,Gender female

 People "cs_6" of age 12 with ID 6,Gender unknown

 People "cs_7" of age 28 with ID 7,Gender unknown

 People "cs_8" of age 11 with ID 8,Gender unknown

 People "cs_9" of age 37 with ID 9,Gender unknown

]

[People "cs_4" of age 6 with ID 4,Gender male

 People "cs_8" of age 11 with ID 8,Gender unknown

 People "cs_6" of age 12 with ID 6,Gender unknown

 People "cs_3" of age 25 with ID 3,Gender unknown

 People "cs_7" of age 28 with ID 7,Gender unknown

 People "cs_0" of age 31 with ID 0,Gender male

 People "cs_2" of age 31 with ID 2,Gender male

 People "cs_9" of age 37 with ID 9,Gender unknown

 People "cs_5" of age 44 with ID 5,Gender female

 People "cs_1" of age 47 with ID 1,Gender unknown