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## listpushback
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### Instructions
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Write a function `ListClear` that delets all `nodes` from a linked list, deleting the link between the list.
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- Tip: assign the list's pointer to nil
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### Expected function and structure
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```go
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func ListClear(l *List) {
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}
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```
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### Usage
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Here is a possible [program](TODO-LINK) to test your function :
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```go
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package main
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import (
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"fmt"
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piscine ".."
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)
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type List = piscine.List
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type Node = piscine.NodeL
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func PrintList(l *List) {
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link := l.Head
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for link != nil {
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fmt.Print(link.Data, " -> ")
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link = link.Next
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}
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fmt.Println(nil)
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}
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func main() {
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link := &List{}
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piscine.ListPushBack(link, "I")
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piscine.ListPushBack(link, 1)
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piscine.ListPushBack(link, "something")
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piscine.ListPushBack(link, 2)
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fmt.Println("------list------")
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PrintList(link)
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piscine.ListClear(link)
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fmt.Println("------updated list------")
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PrintList(link)
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}
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```
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And its output :
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```console
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student@ubuntu:~/piscine/test$ go build
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student@ubuntu:~/piscine/test$ ./test
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------list------
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I -> 1 -> something -> 2 -> <nil>
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------updated list------
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<nil>
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student@ubuntu:~/piscine/test$
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```
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