In this tutorial, we are going to learn about PushFront() function in list package in go golang. PushFront() function is used to insert a new element at the front of list in go golang.
Function proto type:
func (l *List) PushFront(value interface{}) *Element PushFront() function:
PushFront() function inserts a new element at the front of list.
This function returns pointer of newly inserted element.
Example:
list_1 = 1 -> 2 -> 3 -> 4
list_1.PushFront(5)
list_1 = 5 -> 1 -> 2 -> 3 -> 4
Example to use PushFront() function in list:
package main
import (
"container/list"
"fmt"
)
func main() {
var ele *list.Element
// Create list and insert elements in it.
list_1 := list.New()
list_1.PushBack(1) // 1
list_1.PushBack(2) // 1 -> 2
list_1.PushBack(3) // 1 -> 2 -> 3
list_1.PushBack(4) // 1 -> 2 -> 3 -> 4
fmt.Println("Print list before inserting element")
for ele = list_1.Front(); ele != nil; ele = ele.Next() {
fmt.Println(ele.Value)
}
list_1.PushFront(5)
// Now list: 5 -> 1 -> 2 -> 3 -> 4
fmt.Println("Print list after inserting element")
for ele = list_1.Front(); ele != nil; ele = ele.Next() {
fmt.Println(ele.Value)
}
}
Output:
Print list before inserting element
1
2
3
4
Print list after inserting element
5
1
2
3
4 To learn more about golang, Please refer given below link:
https://www.techieindoor.com/go-lang-tutorial/
References:
https://golang.org/doc/
https://golang.org/pkg/
https://golang.org/pkg/fmt/
https://golang.org/pkg/fmt/#Println
https://golang.org/pkg/container/list/