Golang map

m1 := map[string]string{
    "name":"falcon",
    "gender":"male",
}
if name, ok := m1["name"]; ok { //判断一个key是否存在，不存在时ok为false
   fmt.Println("key name exists ,value: " + name)
} else {
   fmt.Println("key not exists")
}
delete(m1, "name") //删除一个元素

if name, ok := m1["name"]; ok { //判断一个key是否存在，不存在时ok为false
   fmt.Println("key name exists ,value: " + name)
} else {
   fmt.Println("key not exists")
}

 

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