项目中需要用到golang的队列，container/list，需要放入的元素是struct，但是因为golang中list的设计，从list中取出时的类型为interface{}，所以需要想办法把interface{}转换为struct。

这里需要用到interface assertion，具体操作见下面代码：

1 package main 2  3 import ( 4     "container/list" 5     "fmt" 6     "strconv" 7 ) 8  9 type People struct {10     Name string11     Age  int12 }13 14 func main() {15     // Create a new list and put some numbers in it.16     l := list.New()17     l.PushBack(People{
   "zjw", 1})18     19     // Iterate through list and print its contents.20     e := l.Front()21     p, ok := (e.Value).(People)22     if ok {23         fmt.Println("Name:" + p.Name)24         fmt.Println("Age:" + strconv.Itoa(p.Age))25     } else {26         fmt.Println("e is not an People")27     }28 }