标签：map string value interface 接口 go id name
点击查看代码
package main
import (
"fmt"
"math/rand"
)
func testInterface() {
var a interface {} // interface可以存储任何类型的值
fmt.Printf("00>> a=%#v %T\n",a,a)
if a==nil{
fmt.Println("01>> a is nil")
}else{
fmt.Println("01>> a is not nil")
}
var b int =100
var c float32=3.2
var d string="hello"
a = b
fmt.Printf("02>> a=%#v %T\n",a,a)
fmt.Printf("02>> b=%#v %T\n",b,b)
a =c
fmt.Printf("03>> a=%#v %T\n",a,a)
fmt.Printf("03>> c=%#v %T\n",c,c)
a =d
fmt.Printf("04>> a=%v %T\n",a,a)
fmt.Printf("04>> d=%v %T\n",d,d)
}
func studentStore() {
var stuMap map[int]map[string]interface {}
stuMap = make(map[int]map[string]interface{},16)
//插入学生信息 id=1,姓名=stu01,分数=78.5,年龄=14
var id =1
var name ="stu01"
var score =78.2
var age = 15
value,ok := stuMap[id]
if !ok{
value = make(map[string]interface{},8)
}
value["name"] = name
value["id"] = id
value["score"] = score
value["age"] = age
stuMap[id] = value
fmt.Printf("stumap:%#v\n",stuMap)
for i:=0; i<10; i++{
value,ok := stuMap[i]
fmt.Printf("02 i= %d>> ok=%t value=%v \n",i, ok , value)
if !ok{
value = make(map[string]interface{},8)
}
value["name"] = fmt.Sprintf("stu%d",i)
value["id"] = i
value["score"] = rand.Float32()*100.0
value["age"] = rand.Intn(100)
stuMap[i] = value
}
fmt.Println()
for k,v := range stuMap{
fmt.Printf("id=%d stu_infoMAp: %#v\n",k,v)
}
}
func main() {
testInterface()
//studentStore()
}
testInterface()输出:
点击查看代码
00>> a=<nil> <nil>
01>> a is nil
02>> a=100 int
02>> b=100 int
03>> a=3.2 float32
03>> c=3.2 float32
04>> a=hello string
04>> d=hello string
studentStore()输出:
点击查看代码
stumap:map[int]map[string]interface {}{1:map[string]interface {}{"age":15, "id":1, "name":"stu01", "score":78.2}}
02 i= 0>> ok=false value=map[]
02 i= 1>> ok=true value=map[age:15 id:1 name:stu01 score:78.2]
02 i= 2>> ok=false value=map[]
02 i= 3>> ok=false value=map[]
02 i= 4>> ok=false value=map[]
02 i= 5>> ok=false value=map[]
02 i= 6>> ok=false value=map[]
02 i= 7>> ok=false value=map[]
02 i= 8>> ok=false value=map[]
02 i= 9>> ok=false value=map[]
id=5 stu_infoMAp: map[string]interface {}{"age":11, "id":5, "name":"stu5", "score":51.521267}
id=8 stu_infoMAp: map[string]interface {}{"age":45, "id":8, "name":"stu8", "score":28.303415}
id=3 stu_infoMAp: map[string]interface {}{"age":40, "id":3, "name":"stu3", "score":6.563702}
id=6 stu_infoMAp: map[string]interface {}{"age":89, "id":6, "name":"stu6", "score":21.426388}
id=9 stu_infoMAp: map[string]interface {}{"age":6, "id":9, "name":"stu9", "score":67.90846}
id=1 stu_infoMAp: map[string]interface {}{"age":59, "id":1, "name":"stu1", "score":66.45601}
id=0 stu_infoMAp: map[string]interface {}{"age":87, "id":0, "name":"stu0", "score":60.466026}
id=2 stu_infoMAp: map[string]interface {}{"age":18, "id":2, "name":"stu2", "score":42.46375}
id=4 stu_infoMAp: map[string]interface {}{"age":0, "id":4, "name":"stu4", "score":9.696952}
id=7 stu_infoMAp: map[string]interface {}{"age":74, "id":7, "name":"stu7", "score":31.805817}
标签：map,string,value,interface,接口,go,id,name 来源： https://www.cnblogs.com/heris/p/15971242.html
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。