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
    let node = this.Head;
        this.Head = newNode;
    while (node.next) {
        node = node.next;
    node.next = newNode;

    let prevNode = null;
    let currentNode = this.Head;
    if(currentNode===null) return;

    let nextNode;
        nextNode = currentNode.next;
        currentNode.next = prevNode;
        prevNode = currentNode;
        currentNode = nextNode;
    this.Head = prevNode;
    let node = this.Head;
    var str = ""
    while (node) {
        str += node.data + "->";
        node = node.next;
    str += "NULL"
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:")
console.log("Reverse Linked list:")

Sample Output:

Original Linked list:
Reverse Linked list:


Flowchart: JavaScript  Exercises: Create and display singly linked list.

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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JavaScript: Tips of the Day

Shorten an array using its length property

A great way of shortening an array is by redefining its length property.

let array = [0, 1, 2, 3, 4, 5, 6, 6, 8, 9]
array.length = 4
// Result: [0, 1, 2, 3]

Important to know though is that this is a destructive way of changing the array. This means you lose all the other values that used to be in the array.

Ref: https://bit.ly/2LBj213