题解 | #反转链表#

/*function ListNode(x){
    this.val = x;
    this.next = null;
}*/
function ReverseList(pHead)
{
  	//pre 指向前一个
      let pre = null
      // current 指向当前
      let cur = pHead
      
      while(cur){
          
          let next = cur.next
          cur.next = pre
          pre = cur
          cur = next
      }
    return pre
}
module.exports = {
    ReverseList : ReverseList
};