203. Remove Linked List Elements

https://leetcode.com/problems/remove-linked-list-elements

Python

class Solution:
    def removeElements(self, head: Optional[ListNode], val: int) -> Optional[ListNode]:
        if not head:
            return None
        head.next = self.removeElements(head.next, val)
        return head if head.val != val else head.next

Javascript

var removeElements = function(head, val) {
    let list = new ListNode();
    let p = list;
    
    while (head !== null) {
      if (head.val !== val) {
        p.next = head;
        p = p.next;
      } 
      head = head.next;
    }
    p.next = null;
    return list.next;
};