JavaScript Exercises: Size of a Singly Linked list
JavaScript Singly Linked List: Exercise-12 with Solution
Write a JavaScript program that calculates the size of a Singly Linked list.
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;
}
size(){
let current = this.Head;
let count = 0;
while (current) {
count++;
current = current.next;
}
return count;
}
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(12));
numList.add(new Node(13));
numList.add(new Node(14));
numList.add(new Node(15));
numList.add(new Node(14));
console.log("Singly Linked list:")
numList.displayList();
console.log("Size of the said list Singly Linked list:")
console.log(numList.size());
console.log("Add more elements to the said linked list.");
numList.add(new Node(20));
numList.add(new Node(21));
numList.add(new Node(22));
numList.displayList();
console.log(numList.size());
Sample Output:
Singly Linked list: 12->13->14->15->14->NULL Size of the said list Singly Linked list: 5 Add more elements to the said linked list. 12->13->14->15->14->20->21->22->NULL 8
Flowchart:
Live Demo:
See the Pen javascript-singly-linked-list-exercise-12 by w3resource (@w3resource) on CodePen.
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Singly Linked List Previous: Remove a node at the specified index in a singly linked list.
Singly Linked List Next: Remove the first element from a Singly Linked list.
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