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## listremoveif
6 years ago
### Instructions
Write a function `ListRemoveIf` that removes all elements that are equal to the `data_ref` in the argument of the function.
6 years ago
### Expected function and structure
```go
type NodeL struct {
Data interface{}
Next *NodeL
}
type List struct {
Head *NodeL
Tail *NodeL
}
func ListRemoveIf(l *List, data_ref interface{}) {
}
```
6 years ago
### Usage
Here is a possible program to test your function :
```go
package main
import (
"fmt"
"piscine"
)
func PrintList(l *piscine.List) {
it := l.Head
for it != nil {
fmt.Print(it.Data, " -> ")
it = it.Next
}
fmt.Print(nil, "\n")
}
func main() {
link := &piscine.List{}
link2 := &piscine.List{}
fmt.Println("----normal state----")
piscine.ListPushBack(link2, 1)
PrintList(link2)
piscine.ListRemoveIf(link2, 1)
fmt.Println("------answer-----")
PrintList(link2)
fmt.Println()
fmt.Println("----normal state----")
piscine.ListPushBack(link, 1)
piscine.ListPushBack(link, "Hello")
piscine.ListPushBack(link, 1)
piscine.ListPushBack(link, "There")
piscine.ListPushBack(link, 1)
piscine.ListPushBack(link, 1)
piscine.ListPushBack(link, "How")
piscine.ListPushBack(link, 1)
piscine.ListPushBack(link, "are")
piscine.ListPushBack(link, "you")
piscine.ListPushBack(link, 1)
PrintList(link)
piscine.ListRemoveIf(link, 1)
fmt.Println("------answer-----")
PrintList(link)
}
```
And its output :
```console
$ go run .
----normal state----
1 -> <nil>
------answer-----
<nil>
----normal state----
1 -> Hello -> 1 -> There -> 1 -> 1 -> How -> 1 -> are -> you -> 1 -> <nil>
------answer-----
Hello -> There -> How -> are -> you -> <nil>
$
```