mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-29 10:06:28 +08:00
45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
"""
|
||
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 include import *
|
||
|
||
""" 哈希查找（数组） """
|
||
def hashing_search(mapp, target):
|
||
# 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)
|
||
|
||
""" 哈希查找（链表） """
|
||
def hashing_search1(mapp, target):
|
||
# 哈希表的 key: 目标元素，value: 结点对象
|
||
# 若哈希表中无此 key ，返回 -1
|
||
return mapp.get(target, -1)
|
||
|
||
|
||
""" Driver Code """
|
||
if __name__ == '__main__':
|
||
target = 3
|
||
|
||
# 哈希查找（数组）
|
||
nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
|
||
# 初始化哈希表
|
||
mapp = {}
|
||
for i in range(len(nums)):
|
||
mapp[nums[i]] = i # key: 元素，value: 索引
|
||
index = hashing_search(mapp, target)
|
||
print("目标元素 3 的索引 =", index)
|
||
|
||
# 哈希查找（链表）
|
||
head = list_to_linked_list(nums)
|
||
# 初始化哈希表
|
||
map1 = {}
|
||
while head:
|
||
map1[head.val] = head # key: 结点值，value: 结点
|
||
head = head.next
|
||
node = hashing_search1(map1, target)
|
||
print("目标结点值 3 的对应结点对象为", node)
|