题解 | #删除链表的节点#

/*class ListNode {
 *     val: number
 *     next: ListNode | null
 *     constructor(val?: number, next?: ListNode | null) {
 *         this.val = (val===undefined ? 0 : val)
 *         this.next = (next===undefined ? null : next)
 *     }
 * }
 */
/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 * 
 * @param head ListNode类 
 * @param val int整型 
 * @return ListNode类
 */
export function deleteNode(head: ListNode, val: number): ListNode {
    // write code here
    if(!head) {
        return null;
    }
    const dummy = new ListNode(0);
    dummy.next = head;
    let cur = dummy;
    while(cur.next) {
        if(cur.next.val === val) {
            cur.next = cur.next.next;
        }
        cur = cur.next;
    }
    return dummy.next;
}