CODEWITHSUNDEEP
gostruct
Volatil3
Volatil3

Reputation: 14978

How to access struct fields from list in a loop

I am inserting a struct variable in the list. I am able to retrieve that inserted item in the loop but not the individual value. I am getting the error:

e.Value.name undefined (type interface {} is interface with no methods)

Code given below:

type Item struct {
    name  string
    value string
}
queue := list.New()
per := Item{name: "name", value: "Adnan"}
queue.PushFront(per)

for e := queue.Front(); e != nil; e = e.Next() {
    fmt.Println(e.Value.name)
}

Upvotes: 0

Views: 63

Answers (1)

icza
icza

Reputation: 417402

container/list.List is not generic, it works with interface{}. Try to use a slice of type []*Item or []Item, so you won't have this problem.

If you must use list.List, you may use a type assertion:

fmt.Println(e.Value.(Item).name)

Using a slice it could look like this:

var queue []Item
per := Item{name: "name", value: "Adnan"}
queue = append(queue, per)

for _, v := range queue {
    fmt.Println(v.name)
}

Note however that append() appends to the end of the slice, so it's not equivalent with List.PushFront().

Upvotes: 5

Related Questions