JavaScript Exercises: Print a singly linked list in reverse order
JavaScript Singly Linked List: Exercise-2 with Solution
Write a JavaScript program to create a singly linked list of n nodes and display it in reverse order.
Sample Solution:
JavaScript Code:
class Node {
constructor(data) {
this.data = data
this.next = null
}
}
class SinglyLinkedList {
constructor(Head = null) {
this.Head = Head
}
add(newNode){
let node = this.Head;
if(node==null){
this.Head = newNode;
return;
}
while (node.next) {
node = node.next;
}
node.next = newNode;
}
reverse_list(){
let prevNode = null;
let currentNode = this.Head;
if(currentNode===null) return;
let nextNode;
while(currentNode){
nextNode = currentNode.next;
currentNode.next = prevNode;
prevNode = currentNode;
currentNode = nextNode;
}
this.Head = prevNode;
}
displayList(){
let node = this.Head;
var str = ""
while (node) {
str += node.data + "->";
node = node.next;
}
str += "NULL"
console.log(str);
}
}
let numList = new SinglyLinkedList();
numList.add(new Node(2));
numList.add(new Node(3));
numList.add(new Node(4));
numList.add(new Node(5));
numList.add(new Node(6));
numList.add(new Node(7));
console.log("Original Linked list:")
numList.displayList();
numList.reverse_list();
console.log("Reverse Linked list:")
numList.displayList();
Sample Output:
Original Linked list: 2->3->4->5->6->7->NULL Reverse Linked list: 7->6->5->4->3->2->NULL
Flowchart:

Live Demo:
See the Pen javascript-singly-linked-list-exercise-2 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Singly Linked List Previous: Create and display singly linked list.
Singly Linked List Next: Count number of nodes in a Singly Linked List.
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