""" File: hashing_search.py Created Time: 2022-11-26 Author: timi (xisunyy@163.com) """ import sys, os.path as osp sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__)))) from modules import * def hashing_search_array(mapp: dict[int, int], target: int) -> int: """ 哈希查找(数组) """ # 哈希表的 key: 目标元素,value: 索引 # 若哈希表中无此 key ,返回 -1 return mapp.get(target, -1) def hashing_search_linkedlist(mapp: dict[int, ListNode], target: int) -> ListNode | None: """ 哈希查找(链表) """ # 哈希表的 key: 目标元素,value: 节点对象 # 若哈希表中无此 key ,返回 None return mapp.get(target, None) """ Driver Code """ if __name__ == '__main__': target: int = 3 # 哈希查找(数组) nums: list[int] = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8] # 初始化哈希表 map0 = dict[int, int]() for i in range(len(nums)): map0[nums[i]] = i # key: 元素,value: 索引 index: int = hashing_search_array(map0, target) print("目标元素 3 的索引 =", index) # 哈希查找(链表) head: ListNode = list_to_linked_list(nums) # 初始化哈希表 map1 = dict[int, ListNode]() while head: map1[head.val] = head # key: 节点值,value: 节点 head = head.next node: ListNode = hashing_search_linkedlist(map1, target) print("目标节点值 3 的对应节点对象为", node)