Title

go中使用空接口保存任意值的字典

package main

import (
	"fmt"
)

// 空接口作为函数参数
func show(a interface{}) {
	fmt.Printf("type:%T value:%v
", a, a)
}

func main() {
	var studentInfo = make(map[string]interface{})
	studentInfo["name"] = "abao"
	studentInfo["age"] = "25"
	studentInfo["married"] = false
	fmt.Println(studentInfo)
}

go类型断言，提取空接口可以存储任意类型的值

func main() {
	var x interface{}
	x = "Hello World"
	v, ok := x.(string)  // v获取值，ok获取返回的状态
	if ok {
		fmt.Println(v)
	} else {
		fmt.Println("类型断言失败")
	}
}

使用swith case

func justifyType(x interface{}) {
	switch v := x.(type) {
	case string:
		fmt.Printf("x is a string，value is %v
", v)
	case int:
		fmt.Printf("x is a int is %v
", v)
	case bool:
		fmt.Printf("x is a bool is %v
", v)
	default:
		fmt.Println("unsupport type！")
	}
}