golang interface 的类型断言

func main() {
	var data interface{} = "ehoo"
	if res, ok := data.(int); ok {
		fmt.Printf("int res:%d\n", res)
	} else if res, ok := data.(bool); ok {
		fmt.Printf("bool res:%b\n", res)
	} else {
		fmt.Printf("other res:%v\n", res) // 断言类型的零值,结果:false
	}
}