浅谈Golang 嵌套 interface 的赋值问题

package main 
import (
    "fmt"
) 
 
func main() {
    s := map[string]interface{}{
        "code":0,
        "msg":"",
        "data":map[string]interface{}{
            "src":"",
        },
    }
 
    s["data"].(map[string]interface{})["src"] = "abc"           // 修改一个属性，类型转换为map[string]interface{}
    s["data"].(map[string]interface{})["new"] = "bbb"           // 新增一个属性
    fmt.Println(s)
}

bs := make(map[string]string)
bs["name"] = "张三"
bs["age"]  = "12"
var student interface{}
student = bs
a := student.(map[string]string)   //将interface转换为map类型，如果不确定数据类型的时候可以使用类型断言，确定其类型之后再转换为相对应的类型，然后取值
fmt.Printf("学生的姓名是: \n %v", a["name"])   //结果: 张三
fmt.Printf("学生的数据是: \n %v", student)

package main
import (
 "fmt"
)
type Integer int
func (a Integer)Less(b Integer) bool{
 return a<b
}
func (a *Integer)Add(b Integer) {
 *a += b
}
type Lesser interface {
 Less(b Integer) bool
}
type LessAdder interface {
 Less(b Integer) bool
 Add(b Integer)
}
func main(){
 fmt.Println("start ...")
 var inter Integer = 1
 var lesser Lesser = inter
 isLess := lesser.Less(3)
 fmt.Println(lesser,"less 3 is ",isLess)
 var lessAdder LessAdder = &inter
 lessAdder.Add(3)
 fmt.Println("lessAdder add 3 is ",inter)
 //fmt.Println("lessAdder is ",*lessAdder) //该条语句不能通过编译
}

package one
type ReadWriter interface{
 Read(buf []byte)(n int,err error)
 Write(buf []byte)(n int,err error)
}
package two
type Istream interface{
 Read(buf []byte)(n int,err error)
 Write(buf []byte)(n int,err error)
}
var file1 one.ReadWriter = new(file)
var file2 two.Istream = file1
var file3 one.ReadWriter = file2