Leetcode•Jul 19, 2025
Remove Linked List Elements
Hazrat Ali
Leetcode
Given the head of a linked list and an integer val, remove all the nodes of the linked list that has Node.val == val, and return the new head.
Example 1:
Input: head = [1,2,6,3,4,5,6], val = 6 Output: [1,2,3,4,5]
Example 2:
Input: head = [], val = 1 Output: []
Example 3:
Input: head = [7,7,7,7], val = 7 Output: []
Solution
/**
*
* @param {ListNode} head
* @param {number} val
* @return {ListNode}
*/
const removeElements = (head, val) => {
const dummy = new ListNode(0);
let p = dummy;
let node = head;
while (node) {
if (node.val !== val) {
p.next = node;
p = p.next;
}
node = node.next;
}
p.next = null;
return dummy.next;
};