Good morning! Here's our prompt for today.

Now that we've implemented a linked list, can you write a method that will delete all nodes of a given value?

You're given the following standard structure as the definition of a linked list node:

1class LinkedListNode {
2	constructor(val) {
3		this.val = val;
4		this.next = null;
5	}
6}

The follow scenario is how we would invoke the method with a linked list 1 -> 2 -> 2 -> 5 -> 6. As you can see, running the method results in removing all 2s in the list.

1// head = 1 -> 2 -> 2 -> 5 -> 6
2// val = 2
3removeNodes(head, val);
4// 1 -> 5 -> 6

Constraints

• The value of the nodes as well as the value to be deleted are within integer limits (between -1000000000 and 1000000000 )
• After deleting the nodes, you need to return the head of the new linked list
• The given linked list can be null
• In case all nodes are deleted, return null
• Expected time complexity : O(n)
• Expected Space complexity : O(1)

Try to solve this here or in Interactive Mode.

How do I practice this challenge?

xxxxxxxxxx

​

# delete node given its key

def removeNodes(head, key):

    # fill

    return head

​

​

# Node definition

class Node:

    def __init__(self, val):

        self.val = val

        self.next = None

​

​

def create_nodes(head, nodes):

    for val in nodes:

        new_node = Node(val)

        head.next = new_node

        head = new_node

​

​

list1 = Node(3)

nodes1 = [4, 5, 6, 7, 8, 9, 10]

create_nodes(list1, nodes1)

​

list2 = Node(1)

nodes2 = [2, 3, 4, 5, 6, 7, 8]

create_nodes(list2, nodes2)

​

​

We'll now take you through what you need to know.

How do I use this guide?