listpushback.go

package main

import "fmt"

type NodeL struct {
	Data interface{}
	Next *NodeL
}

type List struct { // list btbd2 b 2 node head and tail
	Head *NodeL // pointer to head awl node w7da fl linked list
	Tail *NodeL // pointer to tail de l node eli hfdl ndef feha
}

func ListPushBack(l *List, data interface{}) { // no3 interface by2ra ay no3 data
	newnode := &NodeL{Data: data} // newnode de l data eli hdefha ll list, Data dh l goz2 eli f struct node, data de esmaha hna fl function w dymn l next bt3ha nil
	if l.Head == nil {            //awl wa7da fadya          // lw eli gya nil
		l.Head = newnode // 5leha btsawy l data
		l.Tail = newnode // defli l data hna
		return           // dh w ana b7ot ISA awl node
	}
	if l.Tail.Next == nil {
		l.Tail.Next = newnode
	}
	//l.Tail.Next = newnode
	l.Tail = newnode
	//l.Tail = newnode
	// 5li l next bta3 l tail pointer ll new node (e3ml l data fl tail w 5li l text nil)
}

func main() {

	link := &List{}

	ListPushBack(link, "Hello")
	ListPushBack(link, "man")
	ListPushBack(link, "how are you")

	for link.Head != nil {
		fmt.Println(link.Head.Data)
		link.Head = link.Head.Next
	}
}

//Write a function ListPushBack that inserts a new element NodeL
// at the end of the list l while using the structure List.