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singlyLinkedList.js
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singlyLinkedList.js
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class Node {
constructor(data) {
this.data = data;
this.next = null;
}
}
class SinglyLinkedList {
constructor() {
this.head = null;
this.tail = null;
}
addNode(data) {
const node = new Node(data);
if (!this.head) {
this.head = node;
this.tail = node;
} else {
this.tail.next = node;
this.tail = node;
}
}
insertAfter(data, toNodeData) {
let current = this.head;
while (current) {
if (current.data === toNodeData) {
const node = new Node(data);
if (current === this.tail) {
this.tail.next = node;
this.tail = node;
} else {
node.next = current.next;
current.next = node;
break;
}
}
current = current.next;
}
}
removeNode(data) {
let previous = this.head;
let current = this.head;
while (current) {
if (current.data === data) {
if (current === this.head) {
this.head = this.head.next;
}
if (current === this.tail) {
this.tail = previous;
}
previous.next = current.next;
} else {
previous = current;
}
current = current.next;
}
}
}
const mySLL = new SinglyLinkedList();
console.log('Newly constructed:', mySLL);
mySLL.addNode('graeme');
console.log('addNode(graeme):', mySLL);
mySLL.addNode('elliott');
console.log('addNode(elliott):', mySLL);
mySLL.insertAfter('nathaniel', 'elliott');
console.log('insertAfter(nathaniel, elliott):', mySLL);
mySLL.addNode('erickson');
console.log('addNode(erickson):', mySLL);
mySLL.removeNode('graeme');
console.log('removeNode(graeme):', mySLL);
mySLL.removeNode('nathaniel');
console.log('removeNode(nathaniel):', mySLL);
mySLL.removeNode('erickson');
console.log('removeNode(erickson):', mySLL);