/** * Definition for singly-linked list. * function ListNode(val) { *     this.val = val; *     this.next = null; * } *//** * @param {ListNode} head * @param {number} val * @return {ListNode} */var removeElements = function(head, val) {    var dummy = new ListNode(0);          dummy.next = head;          var p = dummy;          var q = head;          while(q !== null) {              if(q.val == val) {                  p.next = q.next;              } else {                  p = p.next;              }              q = q.next;          }                    return dummy.next;  };

Remove Linked List Elements

Total Accepted: 36881 Total Submissions: 140906 Difficulty: Easy

 

Remove all elements from a linked list of integers that have value val.

Example

Given: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6

Return: 1 --> 2 --> 3 --> 4 --> 5

 

JavaScript向下取整：Math.floor(number);//Math.floor(5/2) = 2;

向上取整：Math.ceil(number);//Math.ceil(5/2) = 3;