什么时候在Go中使用匿名函数？ [关闭]

Go supports anonymous functions/closures which reminds me of Lambdas in Python, when would it be ideal to use them in your code?

I think function literals make best sense where the fact that they're closures is useful/used. Consider for example:

type handler func()

func HanldeSomething(h handler)  {
        //...
        h()
        // ...
}

func Elsewhere() {
        var foo int
        HandleSomething(handler(func(){
                fmt.Println("debug: foo in Elsewhere is", foo)
        }))
}

This way, when h is invoked in HandleSomething it can say/do something using the context of Elsewhere. That's handy in many situations.

jnml already gave one of the cases where anonymous functions are useful.

I'll add that you can use them when you simply need to pass a function which won't be called elsewhere :

Goroutine launch :

go func() {
    ...
}()

Pass some code to a function :

http.Handle("/ws", websocket.Handler(func(ws *websocket.Conn) {
  ...