class Node {
constructor(value) {
this.value = value;
this.next = null;
}
}
class LinkedList {
constructor(value) {
this.head = {
value: value,
next: null
};
this.tail = this.head;
this.length = 1;
}
append(value) {
const newNode = new Node(value);
this.tail.next = newNode;
this.tail = newNode;
this.length++;
return this;
}
prepend(value) {
const newNode = new Node(value);
newNode.next = this.head;
this.head = newNode;
this.length++;
return this;
}
printList() {
const array = [];
let currentNode = this.head;
while(currentNode !== null) {
array.push(currentNode.value);
currentNode = currentNode.next;
}
console.log(array)
return array;
}
insert(index, value) {
if(index >= this.length) {
return this.append(value)
}
const newNode = new Node(value);
const leader = this.traverseToIndex(index-1);
const holdingPointer = leader.next;
leader.next = newNode;
newNode.next = holdingPointer;
this.length++;
return this.printList();
}
traverseToIndex(index) {
let counter = 0;
let currentNode = this.head;
while(counter !== index) {
currentNode = currentNode.next;
counter++;
}
return currentNode;
}
}
const myLinkedList = new LinkedList(10);
myLinkedList.append(5)
myLinkedList.append(16)
myLinkedList.append(8)
myLinkedList.prepend(2)
myLinkedList.printList()
myLinkedList.insert(2, 8)
myLinkedList.insert(5, 18)
