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["12345"] = PersionInfo{"12345", "Tom", "Room 203, ..."}
    persionDB["1"] = PersionInfo{"1", "Jack", "Room 101, ..."}

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

    persion, ok = persionDB["12345"]
    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 1234.
Found persion Tom with ID 12345.