Delete Linked List Head In JavaScript

1. Overview

To delete the head element of a linked list in JavaScript, you can simply assign the head to be equal to the next node in the list. You must also ensure that you return the updated list if you delete the first node. It is important to iterate through the list and check for the element to be deleted before making any changes. This will ensure that you do not delete an element that does not exist in your linked list.

2. Benefits Delete Linked List Head In JavaScript

Benefiting from deleting a linked list head in JavaScript can be beneficial due to its ease of use. You are able to easily delete the node at the beginning of the list by simply pointing the head pointer to the second node, freeing up memory for other nodes.

Additionally, you can also remove a node at a specific position without having to reorganize the entire data structure. This is an advantage it has over other data structures as it makes it easier and faster to manipulate. Lastly, you can add a pop method in your singly linked class to easily delete the last node in the list.

3. Implementation of Delete Linked List Head

 it('Implementation of Delete Linked List Head', () => {
    const linkedList = new LinkedList();

    expect(linkedList.deleteHead()).toBeNull();

    linkedList.append(1);
    linkedList.append(2);

    expect(linkedList.head.toString()).toBe('1');
    expect(linkedList.tail.toString()).toBe('2');

    const deletedNode1 = linkedList.deleteHead();

    expect(deletedNode1.value).toBe(1);
    expect(linkedList.toString()).toBe('2');
    expect(linkedList.head.toString()).toBe('2');
    expect(linkedList.tail.toString()).toBe('2');

    const deletedNode2 = linkedList.deleteHead();

    expect(deletedNode2.value).toBe(2);
    expect(linkedList.toString()).toBe('');
    expect(linkedList.head).toBeNull();
    expect(linkedList.tail).toBeNull();
  });

4. Conclusion

In conclusion, deleting the head of a linked list in JavaScript is a simple operation. All you need to do is point the head to the next node and free the unused node.

If you want to delete a node at some specific position, you will have to move the list entirely. Pop method can be included in singly linked class to delete last node in list. Deleting the head of a linked list is quick and easy, and it can be used when necessary.

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Dr. Padmaraj works as a code consultant for international students on this platform. Dr. Padmaraj influence young students to achieve their coding dreams. He is a recognized scholar and a leading expert in coding and technology. Today, via devoutput.com he helps students apply their coding skills to create software applications. Doctor.Padmaraj is a renowned author whose books are available worldwide on Amazon.

1. Overview

2. Benefits Delete Linked List Head In JavaScript

3. Implementation of Delete Linked List Head

4. Conclusion

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