GO语言练习：map基本用法

1、代码

2、运行

---

1、代码

　　文件：map.go

 package main
 import "fmt"

 type PersionInfo struct{
     ID string
     Name string
     Address string
 }

 func main(){
     var persionDB map[string] PersionInfo
     persionDB = make(map[string] PersionInfo)

     persionDB[""] = PersionInfo{"", "Tom", "Room 203, ..."}
     persionDB[""] = PersionInfo{"", "Jack", "Room 101, ..."}

     persion, ok := persionDB[""]
     if ok {
         fmt.Println("Found persion", persion.Name, "with ID 1234.")
     } else {
         fmt.Println("Did not find persion with ID 1234.")
     }   

     persion, ok = persionDB[""]
     if ok {
         fmt.Println("Found persion", persion.Name, "with ID 12345.")
     } else {
         fmt.Println("Did not find persion with ID 12345.")
     }
 }

2、运行

$ go run map.go
Did not find persion with ID .
Found persion Tom with ID .