map操作

package main

import "fmt"

func f1() {

    m := map[string]string{ //初始化map
        "name":  "zhangsan",
        "mouse": "luoji",
        "cup":   "greenCup",
    }

    for k, v := range m { //遍历map
        fmt.Printf("-------k=%v-----v=%v-------\n", k, v)
    }

    //m2:=make(map[string]int)//定义空的map  m2=empty map
    //fmt.Printf("---m2=--%v-------\n",m2)
    //
    //var m3 map[string]int//定义空的map  m3=nil
    //fmt.Printf("---m3=--%v-------\n",m3)

    if mc, ok := m["cup5"]; ok { //map取值，判断是否存在
        fmt.Printf(mc)
    } else {
        fmt.Printf("key does not exits\n")
    }

    mou, ok := m["mouse"]
    fmt.Println(mou, ok)
    delete(m, "mouse") //删除map
    mou, ok = m["mouse"]
    fmt.Println(mou, ok)

}

func main() {

    f1()

}