python/golang 删除链表中的元素

 type Node struct { value int next *Node } type Link struct { head *Node tail *Node lenth int } // 向链表中添加元素 func (link *Link) add(v int) { if link.lenth == 0 { // 当前链表是空链表 link.head = &Node{v, nil} link.tail = link.head link.lenth = 1 } else { newNond := &Node{v, nil} link.tail.next = newNond link.tail = newNond link.lenth += 1 } } // 删除链表中的元素(双指针) func (link *Link) remove(v int) { if link.lenth == 0 { fmt.Println("空链表，不支持该操作") return } var previous *Node = nil for current := link.head; current != nil; current = current.next { if current.value == v { if current == link.head { // 要删除的是头节点 link.head = current.next } else if current == link.tail { // 要删除的是尾节点 previous.next = nil link.tail = previous } else { // 要删除的是中间的节点 previous.next = current.next } link.lenth -= 1 break } previous = current } } // 打印链表 func (link *Link) printList() { if link.lenth == 0 { fmt.Println("空链表") return } for cur := link.head; cur != nil; cur = cur.next { fmt.Printf("%d ", cur.value) } fmt.Println() } 

 class Node: def __init__(self, value, next): self.value = value self.next = next def __str__(self): return str(self.value) class Link: def __init__(self): self.head = None self.tail = None self.lenth = 0 <strong style="color:transparent">来源gao@daima#com搞(%代@#码@网</strong># 向链表中添加元素 def add(self, v): if self.lenth == 0: # 当前链表是空链表 self.head = Node(v, None) self.tail = self.head self.lenth = 1 else: new_node = Node(v, None) self.tail.next = new_node self.tail = new_node self.lenth += 1 # 打印链表 def print(self): if self.lenth == 0: print('空链表') return cur = self.head while True: if cur == None: print() break print(cur, end=' ') cur = cur.next # 删除链表中的元素 def remove(self, v): if self.lenth == 0: return cur = self.head pre = None while True: if cur.value == v: if cur == self.head: # 要删除的是头节点 self.head = cur.next elif cur == self.tail: # 要删除的是尾节点 pre.next = None self.tail = pre else: # 要删除的是中间的节点 pre.next = cur.next self.lenth -= 1 break pre = cur cur = cur.next if cur == None: print("未找到", v) break

 func (link *Link) remove_with_one_pointer(v int) { if link.lenth == 0 { return } if link.tail.value == v { // 要删除的节点是尾节点，需特殊处理 if link.lenth == 1 { // 如果链表只有一个节点 link.head = nil link.tail = nil } else { //大于一个节点 cur := link.head for ; cur.next.next != nil; cur = cur.next { } //找到尾节点的前一个节点 cur.next = nil link.tail = cur } link.lenth -= 1 return } //要删除的节点在头部/中间 的常规情况 for cur := link.head; cur != nil; cur = cur.next { if cur.value == v { cur.value = cur.next.value cur.next = cur.next.next link.lenth -= 1 return } } fmt.Println("未找到", v) }

 def remove_with_one_pointer(self, v): if self.lenth == 0: return if self.tail.value == v: # 要删除的节点是尾节点，需特殊处理 if self.lenth == 1: # 如果链表只有一个节点 self.head = None self.tail = None else: # 大于一个节点 cur = self.head while True: if cur.next.next is None: # 找到尾节点的前一个节点 break else: cur = cur.next cur.next = None self.tail = cur self.lenth -= 1 return # 要删除的节点在头部/中间 的常规情况 cur = self.head while True: if cur.value == v: cur.value = cur.next.value cur.next = cur.next.next self.lenth -= 1 break cur = cur.next if cur is None: print('未找到', v) break